Carrier 69NT40-511-300 to 399 Container Operation Manual EN PDF
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Summary of Content for Carrier 69NT40-511-300 to 399 Container Operation Manual EN PDF
Container Refrigeration
T--285 Rev I
OPERATION AND SERVICE for
69NT40--511--300 to 399 (excluding --310, --344 & --359)
Container Refrigeration Units
OPERATION AND SERVICE MANUAL CONTAINER REFRIGERATION UNIT
69NT40--511--300 to 399 (excluding --310, --344 & --359)
T-285Safety-1
SAFETY SUMMARY
GENERAL SAFETY NOTICES
The following general safety notices supplement the specific warnings and cautions appearing elsewhere in this manual. They are recommendedprecautions thatmust beunderstood andapplied duringoperation andmaintenance of the equipment covered herein. The general safety notices are presented in the following three sections labeled: First Aid, Operating Precautions and Maintenance Precautions. A listing of the specific warnings and cautions appearing elsewhere in the manual follows the general safety notices.
FIRST AID
An injury, no matter how slight, should never go unattended. Always obtain first aid or medical attention immediately.
OPERATING PRECAUTIONS
Always wear safety glasses.
Keep hands, clothing and tools clear of the evaporator and condenser fans.
Nowork should be performed on the unit until all circuit breakers, start-stop switches are turned off, and power supply is disconnected.
Always work in pairs. Never work on the equipment alone.
In case of severe vibration or unusual noise, stop the unit and investigate.
MAINTENANCE PRECAUTIONS
Beware of unannounced starting of the evaporator and condenser fans. Do not open the condenser fan grille or evaporator access panels before turning power off, disconnecting and securing the power plug.
Be sure power is turned off before working onmotors, controllers, solenoid valves and electrical control switches. Tag circuit breaker and power supply to prevent accidental energizing of circuit. Donot bypass any electrical safety devices, e.g. bridginganoverload, or usingany sort of jumperwires. Problemswith the system should be diagnosed, and any necessary repairs performed, by qualified service personnel. When performing any arc welding on the unit or container, disconnect all wire harness connectors from themodules in both control boxes. Do not remove wire harness from the modules unless you are grounded to the unit frame with a static safe wrist strap.
In case of electrical fire, open circuit switch and extinguish with CO2 (never use water).
UNIT LABEL IDENTIFICATION
To help identify the label hazards on the unit and explain the level of awareness each one carries, an explanation is given with the appropriate consequences: DANGER -- means an immediate hazard which WILL result in severe personal injury or death.
WARNING -- means to warn against hazards or unsafe conditions which COULD result in severe personal injury or death. CAUTION -- means to warn against potential hazard or unsafe practice which could result in minor personal injury, product or property damage.
SPECIFIC WARNING AND CAUTION STATEMENTS
The statements listed below are applicable to the refrigeration unit and appear elsewhere in this manual. These recommended precautions must be understood and applied during operation and maintenance of the equipment covered herein.
WARNING Beware of unannounced starting of the evaporator and condenser fans. The unit may cycle the fans and compressor unexpectedly as control requirements dictate.
WARNING Do not attempt to remove power plug(s) before turningOFF start-stop switch (ST), unit circuit break- er(s) and external power source.
WARNING Make sure the power plugs are clean and dry before connecting to any power receptacle.
Safety-2T-285
SPECIFIC WARNING AND CAUTION STATEMENTS -- Continued
WARNING Make sure that the unit circuit breaker(s) (CB-1 & CB-2) and the START-STOP switch (ST) are in the O (OFF) position before connecting to any electrical power source.
WARNING Never use air for leak testing. It has been determined that pressurized, mixtures of refrigerant and air can undergo combustion when exposed to an ignition source.
WARNING Make sure power to the unit is OFF and power plug disconnected before replacing the compressor.
WARNING Before disassembly of any external compressor component make sure to relieve possible internal pressure by loosening the bolts and tapping the component with a soft hammer to break the seal.
WARNING Do not use a nitrogen cylinderwithout a pressure regulator. Do not use oxygen in or near a refrigera- tion system as an explosion may occur.
WARNING Do not open the condenser fan grille before turning power OFF and disconnecting power plug.
WARNING Oakite No. 32 is an acid. Be sure that the acid is slowly added to thewater. DONOTPUTWATER INTO THE ACID -- this will cause spattering and excessive heat.
WARNING Wear rubberglovesandwash thesolution from theskin immediately if accidental contact occurs. Do not allow the solution to splash onto concrete.
WARNING
Always turn OFF the unit circuit breakers (CB-1 & CB-2) and disconnect main power supply before working on moving parts.
WARNING Make sure power to the unit is OFF and power plug disconnected before removing capacitor(s).
WARNING With power OFF discharge the capacitor before disconnecting the circuit wiring.
WARNING The unit power plug must be disconnected to remove power from circuit breaker CB1
CAUTION Donot removewire harnesses fromcontroller unless you are grounded to theunit framewith astatic safe wrist strap.
CAUTION Unplug all controller wire harness connectors before performing arcwelding on any part of the con- tainer.
T-285Safety-3
SPECIFIC WARNING AND CAUTION STATEMENTS -- Continued
CAUTION Pre-trip inspection should not be performed with critical temperature cargoes in the container.
CAUTION When Pre-Trip key is pressed, dehumidification and bulb mode will be deactivated. At the comple- tion of Pre-Trip activity, dehumidification and bulb mode must be reactivated.
CAUTION Whencondenserwater flow isbelow11 lpm (3gpm)orwhenwater-cooled operation is not in use, the CFS switch MUST be set to position 1 or the unit will not operate properly.
CAUTION When a failure occurs during automatic testing the unit will suspend operation awaiting operator intervention.
CAUTION When Pre--Trip test Auto 2 runs to completion without being interrupted, the unit will terminate pre- trip and display Auto 2 end. The unit will suspend operation until the user depresses the ENTER key!
CAUTION The unit will remain in the full cooling mode as long as the emergency bypass switch is in the BY- PASS position. If the cargo may be damaged by low temperatures, the operator must monitor con- tainer temperatureandmanually cycleoperation as required tomaintain temperaturewithin required limits.
CAUTION The unit will remain in the DEFROST mode as long as the emergency defrost switch is in the DE- FROST position. To prevent cargo damage, the operator must monitor container temperature and manually cycle operation as required to maintain temperature within required limits.
CAUTION To prevent trapping liquid refrigerant in the manifold gauge set be sure set is brought to suction pressure before disconnecting.
CAUTION Removing the compressormotor press-fit stator in the field is not recommended. The rotor and sta- tor are a matched pair and should not be separated.
CAUTION The copper tube which connects to the oil suction strainer extends out the bottom with the bottom plate removed. Take precautions to avoid bending or breaking it while changing crankcase posi- tions.
CAUTION Ensure that thrust washer does not fall off dowel pins while installing oil pump.
CAUTION The set screw on the crankshaft must be removed for this type of oil pump.
CAUTION Use only Carrier Transicold approved Polyol Ester Oil (POE) -- Mobil ST32 compressor oil with R-134a. Buy in quantities of one quart or smaller. When using this hygroscopic oil, immediately reseal. Do not leave container of oil open or contamination will occur.
Safety-4T-285
SPECIFIC WARNING AND CAUTION STATEMENTS -- Continued
CAUTION Take necessary steps (place plywood over coil or use sling on motor) to prevent motor from falling into condenser coil.
CAUTION
If the thermostatic expansion valve is found to be in need of replacement, then the power head and cage assembly are to replaced as a pair. They are amatched pair and replacing onewithout the other will affect the superheat setting.
CAUTION DO NOT disassemble piston from NEW suction modulating valve powerhead assembly. Doing so may result in damage to piston.
CAUTION The unit must be OFF whenever a programming card is inserted or removed from the controller pro- gramming port.
CAUTION
All 69NT40-511-3XX units must use software revision 5108 or higher to enable stepper motor. Optional features may require higher software revision levels to enable functionality.
CAUTION Do not allow moisture to enter wire splice area as this may affect the sensor resistance.
CAUTION
Do not allow the recorder stylus to snap back down. The stylus arm base is spring loaded, and damage may occur to the chart, or the stylus force may be altered.
CAUTION
The insidemechanismof the recorder, particularly the insideof theelement housing should neverbe oiled, however, control mechanisms should be sprayed periodically (every 60 days) with corrosion inhibiting CRC 3-36a or 6-66 or LPS no. 2.
CAUTION
Recorder element capillary tubingmay be bent, but never sharper than 1/2 radius; extra careshould be taken when bending adjacent to welds. The bulb should never be bent, as this will affect calibration.
i T-285
TABLE OF CONTENTS
PARAGRAPH NUMBER Page GENERAL SAFETY NOTICES Safety-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FIRST AID Safety-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OPERATING PRECAUTIONS Safety-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MAINTENANCE PRECAUTIONS Safety-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . UNIT LABEL IDENTIFICATION Safety-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPECIFIC WARNING AND CAUTION STATEMENTS Safety-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 INTRODUCTION 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 CONFIGURATION IDENTIFICATION 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 OPTION DESCRIPTION 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.1 Battery 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.2 Dehumidification 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.3 Control Box 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.4 Temperature Readout 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.5 Pressure Readout 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.6 USDA 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.7 Interrogator 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.8 Remote Monitoring 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.9 Communications. 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.10 Compressor 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.11 Condenser Coil 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.12 Autotransformer 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.13 Temperature Recorder 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.14 Gutters 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.15 Handles 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.16 Thermometer Port 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.17 Water Cooling 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.18 Back Panels 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.19 460 Volt Cable 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.20 230 Volt Cable 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.21 Cable Restraint 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.22 Upper Air (Fresh Air Make Up) 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.23 Lower Air (Fresh Air Make Up) 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.24 Controlled Atmosphere 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.25 Arctic Mode 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.26 Humidification 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.27 Power Correction 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.28 Evaporator 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.29 Evaporator Fan Operation 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.30 Labels 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.31 Plate Set 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.32 Controller 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.33 Condenser Grille 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3.34 Emergency Bypass 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iiT-285
TABLE OF CONTENTS - Continued
PARAGRAPH NUMBER Page DESCRIPTION 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 GENERAL DESCRIPTION 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.1 Refrigeration Unit -- Front Section 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.2 Fresh Air Makeup Vent 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.3 Evaporator Section 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.4 Compressor Section 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.5 Air Cooled Condenser Section 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.6 Water-Cooled Condenser Section 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.7 Control Box Section 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.8 Communications Interface Module 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 REFRIGERATION SYSTEM DATA 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3 ELECTRICAL DATA 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 SAFETY AND PROTECTIVE DEVICES 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 REFRIGERATION CIRCUIT 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MICROPROCESSOR 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 TEMPERATURE CONTROL MICROPROCESSOR SYSTEM 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.1 Key Pad 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.2 Display Module 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.3 Controller 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 CONTROLLER SOFTWARE 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2.1 Configuration Software (Configuration Variables) 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2.2 Operational Software (Function Codes) 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 MODES OF OPERATION 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.1 Temperature Control -- Perishable Mode 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.2 Evaporator Fan Operation 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.3 Defrost Interval 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.4 Failure Action 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.5 Generator Protection 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.6 Condenser Pressure Control 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.7 Arctic Mode 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.8 Perishable Mode -- Conventional 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.9 Perishable Mode -- Economy 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.10 Perishable Mode -- Dehumidification 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.11 Perishable, Dehumidification -- Bulb Mode 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.12 Temperature Control -- Frozen Mode 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.13 Frozen Mode -- Conventional 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.14 Frozen Mode -- Economy 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 CONTROLLER ALARMS 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5. UNIT PRE-TRIP DIAGNOSTICS 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6 DataCORDER 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.1 Description 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6.2 DataCORDER Software 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6.3 Sensor Configuration (dCF02) 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6.4 Logging Interval (dCF03) 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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3.6.5 Thermistor Format (dCF04) 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.6 Sampling Type (dCF05 & dCF06) 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.7 Alarm Configuration (dCF07 -- dCF10) 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.8 DataCORDER Power-Up 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.9 Pre-Trip Data Recording 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.10 DataCORDER Communications 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.11 USDA Cold Treatment 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.12 USDA Cold Treatment Procedure 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.13 DataCORDER Alarms 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 INSPECTION (Before Starting) 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 CONNECT POWER 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.1 Connection To 380/460 vac Power 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.2 Connection to190/230 vac Power 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 ADJUST FRESH AIR MAKEUP VENT 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.1 Upper Fresh Air Makeup Vent 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.1 Fresh Air Vent Position Sensor (VPS) 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.2 Lower Fresh Air Makeup Vent 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 CONNECT WATER-COOLED CONDENSER 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.1 Water--Cooled Condenser with Water Pressure Switch 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.2 Water-Cooled Condenser with Condenser Fan Switch 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5 CONNECT REMOTE MONITORING RECEPTACLE 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6 STARTING AND STOPPING INSTRUCTIONS 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.1 Starting the Unit 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.2 Stopping the Unit 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7 START--UP INSPECTION 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.1 Physical Inspection 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.2 Check Controller Function Codes 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.3 Start Temperature Recorder 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.4 Complete Inspection 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.8 PRE-TRIP DIAGNOSIS 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9 OBSERVE UNIT OPERATION 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.1 Crankcase Heater 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.2 Probe Check 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10 SEQUENCE OF OPERATION 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.1 Sequence Of operation -- Perishable Mode Cooling 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.2 Sequence Of Operation -- Perishable Mode Heating 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.3 Sequence Of operation -- Frozen Mode Cooling 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.4 Sequence Of Operation -- Defrost 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.11 EMERGENCY OPERATION 4-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.11.1 Emergency Bypass Operation. 4-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.11.2 Emergency Defrost Operation. 4-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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TROUBLESHOOTING 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1 UNIT WILL NOT START OR STARTS THEN STOPS 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 UNIT OPERATES LONG OR CONTINUOUSLY IN COOLING 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 UNIT RUNS BUT HAS INSUFFICIENT COOLING 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4 UNIT WILL NOT HEAT OR HAS INSUFFICIENT HEATING 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.5 UNIT WILL NOT TERMINATE HEATING 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.6 UNIT WILL NOT DEFROST PROPERLY 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.7 ABNORMAL PRESSURES (COOLING) 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.8 ABNORMAL NOISE OR VIBRATIONS 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.9 CONTROLLER MALFUNCTION 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.10 NO EVAPORATOR AIR FLOW OR RESTRICTED AIR FLOW 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.11 THERMOSTATIC EXPANSION VALVE MALFUNCTION 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.12 AUTOTRANSFORMER MALFUNCTION 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.13 WATER-COOLED CONDENSER OR WATER PRESSURE SWITCH 5-4. . . . . . . . . . . . . . . . . . . . . . . .
SERVICE 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1 SECTION LAYOUT 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 SERVICE VALVES 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3. MANIFOLD GAUGE SET 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4 PUMPING THE UNIT DOWN 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.5 REFRIGERANT LEAK CHECKING 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.6 EVACUATION AND DEHYDRATION 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.6.1 General 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.6.2 Preparation 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.6.3 Procedure - Complete system 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.6.4 Procedure - Partial System 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.7 REFRIGERANT CHARGE 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.7.1 Checking the Refrigerant Charge 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.7.2 Adding Refrigerant to System (Full Charge) 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.7.3 Adding Refrigerant to System (Partial Charge) 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.8 COMPRESSOR 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.8.1 Removal and Replacement of Compressor 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.8.2 Compressor Disassembly 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.8.3 Compressor Reassembly 6-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.8.4 Preparation 6-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.8.5 Installing the Components 6-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.8.6 Compressor Oil Level 6-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.9 HIGH PRESSURE SWITCH 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.9.1 Replacing High Pressure Switch 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.9.2 Checking High Pressure Switch 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.10 CONDENSER COIL 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.11 CONDENSER FAN AND MOTOR ASSEMBLY 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.12 WATER COOLED CONDENSER CLEANING 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.13 FILTER-DRIER 6-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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PARAGRAPH NUMBER Page 6.14 THERMOSTATIC EXPANSION VALVE 6-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.14.1 Checking Superheat. 6-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.14.2 Hermetic Valve Replacement 6-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.14.3 Semi--Hermetic Valve Replacement 6-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.15 EVAPORATOR COIL AND HEATER ASSEMBLY 6-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.15.1 Evaporator Coil Replacement 6-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.15.2 Evaporator Heater Replacement 6-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.16 EVAPORATOR FAN AND MOTOR ASSEMBLY 6-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.16.1 Replacing The Evaporator Fan Assembly 6-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.16.2 Disassemble The Evaporator Fan Assembly 6-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.16.3 Assemble The Evaporator Fan Assembly 6-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.17 EVAPORATOR FAN MOTOR CAPACITORS 6-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.17.1 When To Check For A Defective Capacitor 6-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.17.2 Removing The Capacitor 6-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.17.3 Checking The Capacitor 6-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.18 SUCTION MODULATION VALVE 6-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.18.1 Precheck Procedure 6-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.18.2 Checking The Stepper valve 6-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.18.3 Checking The Drive Module 6-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.18.4 Checking The Controller 6-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.18.5 Emergency Repair Procedures: 6-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.19 AUTOTRANSFORMER 6-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.20 VENT POSITION SENSOR SERVICE 6-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.21 CONTROLLER 6-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.21.1 Handling Controller 6-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.21.2 Controller Trouble-Shooting 6-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.21.3 Controller Programming Procedure 6-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.21.4 Removing and Installing the Controller 6-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.21.5 Battery Replacement 6-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.22 TEMPERATURE SENSOR SERVICE 6-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.22.1 Sensor Checkout Procedure 6-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.22.2 Sensor Replacement 6-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.22.3 Sensor Re--Installation 6-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.23 ELECTRONIC PARTLOW TEMPERATURE RECORDER 6-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.24 MECHANICAL PARTLOW TEMPERATURE RECORDER 6-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.24.1 Checking The Temperature Recorder 6-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.25 SAGINOMIYA TEMPERATURE RECORDER 6-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.26 MAINTENANCE OF PAINTED SURFACES 6-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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PARAGRAPH NUMBER Page 6.27 COMPOSITE CONTROL BOX REPAIRS 6-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.27.1 Introduction 6-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.27.2 Cracks 6-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.27.3 Chips And Holes 6-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.27.4 Inserts 6-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.27.5 Door Hinge Inserts 6-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.28 COMMUNICATIONS INTERFACE MODULE INSTALLATION 6-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.29 POWER FACTOR CORRECTOR CAPACITORS (PFC) 6-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL WIRING SCHEMATIC 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.1 INTRODUCTION 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIST OF ILLUSTRATIONS FIGURE NUMBER Page Figure 2-1 Refrigeration Unit -- Front Section 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2-2 Evaporator Section 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2-3 Compressor Section 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2-4 Condenser Section 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2-5 Water-Cooled Condenser Section 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2-6 Control Box Section 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2-7 Refrigeration Circuit Schematic 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 3- 1 Temperature Control System 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 3- 2 Key Pad 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 3- 3 Display Module 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 3- 4 Micro-Link 2i Controller 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 3- 5 Standard Configuration Report 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 3- 6 Data Reader 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 4-1 Autotransformer 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 4-2 Make Up Air Flow Chart 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 4-3 Controller Operation -- Perishable Mode 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 4-4 Controller Operation -- Frozen Mode 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 4-5 Perishable Mode Cooling 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 4-6 Perishable Mode Heating 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 4-7 Frozen Mode 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 4-8 Defrost 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-1 Service Valve 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-2 Manifold Gauge Set 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-3 R-134a Manifold Gauge/Hose Set 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-4. Refrigeration System Service Connections 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-5. Compressor Service Connections 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-6 Compressor 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-7 Exploded View of Valve Plate 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-8 Bottom Plate Removed 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-9 Oil Pump and Bearing Head 6-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-10 Low Profile Oil Pump 6-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-11 Motor End Cover 6-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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LIST OF ILLUSTRATIONS (continued) FIGURE NUMBER Page Figure 6-12 Equalizing Tube and Lock Screw Assembly 6-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-13 Crankshaft Assembly 6-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-14 Suction Valve & Positioning Springs 6-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-15 Piston Ring 6-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-16 High Pressure Switch Testing 6-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-17 Water-Cooled Condenser Cleaning -- Forced Circulation 6-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-18 Water Cooled Condenser Cleaning - Gravity Circulation 6-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-19 Thermostatic Expansion Valve Bulb 6-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-20 Hermetic Thermostatic Expansion Valve 6-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-21 Hermetic Thermostatic Expansion Valve Brazing Procedure 6-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-22. Thermostatic Expansion Valve 6-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-23. Evaporator Fan Assembly 6-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-24 Suction Modulation Valve (SMV) 6-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-25 Jumper Assembly 6-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-26 Controller Section of the Control Box 6-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-27 Sensor Types 6-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-28 Sensor and Cable Splice 6-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-29 Supply Sensor Positioning 6-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-30 Return Sensor Positioning 6-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-31. Electronic Partlow Temperature Recorder 6-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-32. Partlow Mechanical Temperature Recorder 6-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-33. Saginomiya Temperature Recorder 6-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-34 Door Hinge Repair 6-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-35. Insert Location 6-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-36. Communications Interface Installation 6-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6-37 R-134a Compressor Pressure and Motor Current Curves Versus Ambient Temperature 6-36. . . . . Figure 7-1 LEGEND 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 7-2 SCHEMATIC DIAGRAM -- Normal Evaporator Fan Operation 7-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 7-3 SCHEMATIC DIAGRAM -- Single Evaporator Fan Capability 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 7-4 SCHEMATIC DIAGRAM -- TransFRESH, Vent Position Sensor (VPS), Humidity & Recorders 7-5 Figure 7-5 WIRING DIAGRAM -- Normal Evaporator Fan Operation,
Units with Dual Capacitor Evaporator Fan Motors 7-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 7-6 WIRING DIAGRAM -- Single Evaporator Fan Capacity ,
Units with Dual Capacitor Evaporator Fan Motors 7-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 7-7 WIRING DIAGRAM -- Normal Evaporator Fan Operation ,
Units with Single Capacitor Evaporator Fan Motors 7-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 7-8 WIRING DIAGRAM -- Single Evaporator Fan Capacity ,
Units with Single Capacitor Evaporator Fan Motors 7-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 7-9 WIRING DIAGRAM -- Electronic Partlow Temperature Recorder 7-14. . . . . . . . . . . . . . . . . . . . . . . . . .
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LIST OF TABLES
TABLE NUMBER Page Table 2-1 Safety and Protective Devices 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 3-1 Key Pad Function 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 3-2 DataCORDER Configuration Variables 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 3-3 DataCORDER Standard Configurations 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 3-4 Controller Configuration Variables 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 3-5 Controller Function Codes 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 3-6 Controller Alarm Indications 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 3-7 Controller Pre-Trip Test Codes 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 3-8 DataCORDER Function Code Assignments 3-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 3-9 DataCORDER Pre-Trip Result Records 3-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 3-10 DataCORDER Alarm Indications 3-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 6-1 Sensor Temperature/Resistance Chart 6-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 6-2 Temperature-Resistance Chart 6-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 6-3 Crack, Chip & Hole Repair Kit 6-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 6-4 Insert Repair Kit 6-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 6-5 Drill Information 6-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 6-6 Recommended Bolt Torque Values 6-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 6-7 Wear Limits For Compressors 6-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 6-8 Compressor Torque Values 6-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 6-9 R-134a Temperature - Pressure Chart 6-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1 T-285
SECTION 1
INTRODUCTION
1.1 INTRODUCTION
The Carrier Transicold model 69NT40--511--300 series units are of lightweight aluminum frame construction, designed to fit in the front of a container and serve as the containers front wall.
They are one piece, self-contained, all electric units which includes cooling and heating systems to provide precise temperature control.
The units are suppled with a complete charge of refrigerant R-134a and compressor lubricating oil and are ready for operation upon installation. Forklift pockets are provided for unit installation and removal.
The base unit operates on nominal 380/460 volt, 3 phase, 50/60 hertz power. An optional autotransformer may be fitted to allow operation on nominal 190/230 , 3 phase, 50/60 hertz power. Power for the control system is provided by a transformer which steps the supply power down to 18 and 24 volts, single phase.
The controller is a Carrier Transicold Micro-Link 2i microprocessor. The controller will operate automatically to select cooling, holding or heating as required to maintain the desired set point temperature within very close limits. The unit may also be equipped with a mechanical or electronic temperature recorder.
The controller has a keypad and display for viewing or changing operating parameters. The display is also equipped with lights to indicate various modes of operation.
1.2 CONFIGURATION IDENTIFICATION
Unit identification information is provided on a plate located near the compressor. The plate provides the unit model number, the unit serial number and the unit parts identification number (PID). The model number identifies the overall unit configuration while the PID provides information on specific optional equipment, factory provision to allow for field installation of optional equipment and differences in detailed parts.
Configuration identification for the models covered herein are provided in the Carrier Transicold Container Identification Matrix found at the Carrier Web site, www.container.carrier.com.
1.3 OPTION DESCRIPTION
Various options may be factory or field equipped to the base unit. These options are listed in the tables and described in the following subparagraphs.
1.3.1 Battery The refrigeration controller may be fitted with standard replaceable batteries or a rechargeable battery pack. 1.3.2 Dehumidification The unit may be fitted with a humidity sensor. This sensor allows setting of a humidity set point in the controller. In the dehumidification mode the controller will operate to reduce internal container moisture level. 1.3.3 Control Box The control box may be of aluminum or composite material and each type boxmay be fitted with a lockable door. 1.3.4 Temperature Readout The unit may be fitted with suction and discharge temperature sensors. The sensor readings may be viewed on the controller display. 1.3.5 Pressure Readout The unit may be fitted with suction and discharge pressure gauges or suction and discharge transducers or no pressure readout. The transducer readings may be viewed on the controller display. 1.3.6 USDA The unit may be supplied with fittings for additional temperature probes which allow recording of USDA Cold Treatment data by the integral DataCORDER function of the Micro--Link refrigeration controller. 1.3.7 Interrogator Units that use the DataCORDER function are fitted with interrogator receptacles for connection of equipment to download the recorded data. Two receptacles may be fitted, one accessible from the front of the container and the other mounted inside the container (with the USDA receptacles). 1.3.8 Remote Monitoring The unit may be fitted with a remote monitoring receptacle. This item allows connection of remote indicators for COOL, DEFROST and IN RANGE. Unless otherwise indicated, the receptacle is mounted at the control box location 1.3.9 Communications. The unit may be fitted with a communications interface module. The communications interface module is a slave module which allows communication with a master central monitoring station. The module will respond to communication and return information over the main power line. Refer to the ship master system technical manual for further information. 1.3.10 Compressor The unit is fitted with a single speed reciprocating compressor.
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1.3.11 Condenser Coil
The unit may be fitted with a 2 row or 4 row coil using nominal 3/8 inch tubing, or the unit may be fitted with a 3 row coil using 7mm tubing. The required refrigerant charge is different for each coil.
1.3.12 Autotransformer
An autotransformer may be provided to allow operation on 190/230, 3phase, 50/60 hertz power. The autotransformer raises the supply voltage to the nominal 380/460 volt power required by the base unit. The autotransformer may also be fitted with an individual circuit breaker for the 230 volt power.
If the unit is equipped with an autotransformer and communications module, the autotransformer will be fitted with a transformer bridge unit (TBU) to assist in communications.
1.3.13 Temperature Recorder
One of three recording devices may be fitted to the unit. The devices include a mechanical recorder manufactured by Partlow Corporation, a mechanical recorder manufactured by Saginomiya Corporation, and an electronic recorder manufactured by Partlow Corporation.
1.3.14 Gutters
Rain gutters may be fitted over the control box and recorder section to divert rain away form the controls. The different gutters include standard length bolted gutters, extended length gutters and riveted gutters.
1.3.15 Handles
The unit may be equipped with handles to facilitate access to stacked containers. These handles may include fixed handles (located at the sides of the unit) and/or a hinged handle at the center (attached to the condenser coil cover).
1.3.16 Thermometer Port
The unit may be fitted with ports in the front of the frame for insertion of a thermometer tomeasure supply and/or return air temperature. If fitted, the port(s) will require a cap and chain.
1.3.17 Water Cooling
The refrigeration system may be fitted with a water cooled condenser. The condenser is constructed using copper--nickel tube for sea water applications. The water cooled condenser is in series with the air cooled condenser and replaces the standard unit receiver. When operating on the water cooled condenser, the condenser fan is deactivated by either a water pressure switch or condenser fan switch.
1.3.18 Back Panels
Back panel designs that may be fitted include panels of aluminum and stainless steel. Panels may have access doors and/or hinge mounting.
1.3.19 460 Volt Cable Various power cable and plug designs are available for the main 460 volt supply. The plug options tailor the cables to each customers requirements. 1.3.20 230 Volt Cable Units equipped with an autotransformer require an additional power cable for connection to the 230 volt source. Various power cable and plug designs are available. The plug options tailor the cables to each customers requirements. 1.3.21 Cable Restraint Various designs are available for storage of the power cables. These options are variations of the compressor section front cover. 1.3.22 Upper Air (Fresh Air Make Up) The unit may be fitted with an upper fresh air makeup assembly. The fresh air makeup assembly is available with a Vent Positioning Sensor (VPS) and may also be fitted with screens. 1.3.23 Lower Air (Fresh Air Make Up) The unit may be fitted with a lower fresh air makeup assembly. These assemblies are supplied in two designs, the standard designand themacrodesign.The openings may also be fitted with screens. 1.3.24 Controlled Atmosphere The units may be fitted with the TransFresh option. For information on the TransFresh system, contact TransFresh Corporation, P.O. Box 1788, Salinas CA 93902 1.3.25 Arctic Mode To improve operation in cold ambients, the unit may be fittedwith a crankcaseheater and/or a condensate drain line heater. The crankcase heater is operated, before start--up, to warm the compressor oil and boil off any liquid refrigerant that may be present in the crankcase. The drain line heater is operated to prevent freezing of the evaporator condensate drain system. 1.3.26 Humidification The unit may be equipped with the Carrier Transicold NatureFresh humidity management system. The system includes awater tank, water pump, water heater and atomizer along with various control and monitoring devices. It is designed to add additional moisture into the supply air for control of cargo moisture level. A separately bound manual covering operation and parts for the CTD NatureFresh System is available, see the following chart.
Manual Number
Equipment Covered
Type of Manual
T-297 Humidity Management System Option
Technical Supplement
1.3.27 Power Correction The unit may be fitted with a set of power factor correction capacitors to assist in correction of imbalance in current draw by the compressor. 1.3.28 Evaporator Evaporator section options include a semi--hermetic thermal expansion valve, a hermetic thermal expansion
1-3 T-285
valve and two sizes of heat exchangers. The unit may have 4 or 6 heaters. 1.3.29 Evaporator Fan Operation Two evaporator fan motor operation systems are available. On units with Normal Evaporator Fan Operation, opening of an evaporator fan internal protector will shut down the unit. On units equippedwith Single Evaporator Fan Capability, additional relays are installed to allow the unit to continue to operate on a single fan. 1.3.30 Labels Operating Instruction and Function Code listing labels will differ depending on the options installed. For example, additional operating instructions are required to describe start--up of a unit equipped with an autotransformer. Where the labels are available with additional languages, they are listed in the parts list. 1.3.31 Plate Set Each unit is equipped with a tethered set of wiring schematic andwiring diagram plates. The plate sets are ordered using a seven digit base part number and a two digit dash number. See the unit identification Matrix found at the Carrier Web site, www.container.carrier.com. 1.3.32 Controller Two different controllers are available: 1. Remanufactured -- Controller is the equivalent of a new OEM controller and is supplied with a 12 month warranty. 2. Repaired -- Controller has had previous faults repaired and upgraded with the latest software. Note: Repaired controllers are NOT to be used for warranty repairs only full OEM Remanufactured controllers are to be used. Controllers will be factory equipped with the latest version of operational software, but will NOT be configured for a specific model number and will need to be configured, at the time of installation or sale.
The following Part numbers cover ALL previous MicroLink 2 and 2i controllers:
Part Number Model
Reman- ufactured Repaired
Description Usage
N/A 12--56000 ML2 Recip (SWR12XX)
69NT40--489 / 501
12--55001 12--56001 ML2I Recip. (SWR12XX)
69NT40--489 / 501
12--55002 12--56002 ML2I Recip. (SWR51XX) 69NT40--511
12--55003 12--56003 ML2I Scroll (SWR53XX) 69NT40--531
12--55004 12--56004 DataCorder (SWR21XX)
69NT40--489 / 501
12--55005 12--56005 CA (SWR31XX)
69NT40--489 --1XX
The identification label on each controller will have the part number as shown above followed by a dash and then a blank space to allow the final dash number to be added at the time of sale. Once a unit has been configured, the last digits of the part number can be found in the T--300 Unit Matrix. It is important when installing a controller that this final piece of the part number is added. Example -- If a repaired controller is required for a 69NT40--511--343, PID NT0809: Use the ML2I reciprocating compressor base controller 12--56002. The dash number from the T--300 Unit Matrix (Controller Column) is 90. The full part number for the necessary controller is 12--56002--90. 1.3.33 Condenser Grille Two styles of condenser grilles are available, direct bolted grilles and hinged grilles. 1.3.34 Emergency Bypass The unit may be equipped with switches to allow emergency bypass of the controller. TheEMERGENCY BYPASS switch functions to bypass the controller in the event of controller failure. The EMERGENCY DEFROST switch functions to bypass all controls and place the unit in the defrost mode.
T-2852-1
SECTION 2
DESCRIPTION
2.1 GENERAL DESCRIPTION
2.1.1 Refrigeration Unit -- Front Section
The unit is designed so that the majority of the components are accessible from the front, see Figure 2-1. Theupper access panels allowentry into the evaporator section, and the center access panel allows access to the thermostatic expansion valve and
evaporator coil heaters. The unit model number, serial number and parts identification number canbe foundon the serial plate to the left of the compressor.
2.1.2 Fresh Air Makeup Vent
The function of the upper or lower makeup air vent is to provide ventilation for commodities that require fresh air circulation.
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14
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1. Access Panel (Evap. Fan #1) 2. Access Panel (Heater & Thermostatic
Expansion Valve) 3. Fork Lift Pockets 4. Control Box 5. Compressor 6. Unit Serial Number, Model Number and
Parts Identification Number (PID) Plate 7. Condenser Fan 8. TransFRESH Communications Connector
9. Interrogator Connector (Front right) 10. Temperature Recorder 11. Lower Fresh Air Makeup Vent Location
(Blank Cover Shown) 12. TIR (Transports Internationaux Routiers)
Sealing Provisions - Typical All Panels 13. Upper Fresh Air Makeup Vent (with VPS if
equipped) 14. Access Panel (Evap. Fan #2)
Figure 2-1 Refrigeration Unit -- Front Section
2-2T-285
2.1.3 Evaporator Section The evaporator section (Figure 2-2) contains the temperature recorder bulb or return recorder sensor, return temperature sensor, thermostatic expansion valve, dual-speed evaporator fans (EM1 and EM2), evaporator coil and heater, drain pan heater, defrost heaters, defrost temperature sensor, heat termination thermostat, and heat exchanger.
The evaporator fans circulate air through the container by pulling it in the top of the unit, directing it through the evaporator coil, where it is heated or cooled, and discharging it at the bottom.
The evaporator components are accessible by removing the upper rear panel (as shown in the illustration) or by removing the front access panels.
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14 15
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ALTERNATE USDA LOCATION
HTT Alternate Location
1. Evaporator Fan Motor #1 2. Return Recorder Sensor 3. Return Temperature Sensor 4. Humidity Sensor 5. Mechanical Recorder Bulb 6. Evaporator Fan Motor #2 7. Defrost Temperature Sensor 8. Heater Termination Thermostat 9. Evaporator Coil 10. Drain Pan Heater
11. Hermetic Thermostatic Expansion Valve 12. Semi--Hermetic Thermostatic Expansion Valve 13. Heat Exchanger 14. Interrogator Connector (Rear) 15. USDA Probe Receptacle PR2 16. USDA Probe Receptacle PR1 17. USDA Probe Receptacle PR3 18. Cargo Probe Receptacle PR4 19. Evaporator Coil Heaters
Figure 2-2 Evaporator Section
T-2852-3
2.1.4 Compressor Section
The compressor section includes the compressor (with high pressure switch), power cable storage compartment, and autotransformer.
This section also contains the suctionmodulating valve,
modulating valve stepper motor drive, discharge pressure regulator valve and discharge/suction pressure transducers. The supply temperature sensor, supply recorder sensor and ambient sensor are located at the right side of the compressor.
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5 6
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1. Autotransformer 2. Power Cables and Plug 3. Compressor Sight Glass View Port 4. Compressor Guard 5. Supply Temperature Sensor 6. Supply Recorder Sensor 7. Ambient Sensor 8 Supply Air Thermometer Port 9. Discharge Service Valve 10. Discharge Temperature Sensor 11. Discharge Pressure Regulator Valve 12. Suction Temperature Sensor
13. Quench Valve Temperature Bulb 14. Stepper Motor Drive (for item 18) 15. Emergency Bypass Module (for item 18) 16. Quench Valve 17. Access Valve 18. Suction Modulating Valve 19. Suction Service Valve 20. Compressor Crankcase Heater 21. Compressor Motor 22. Suction Pressure Transducer 23. High Pressure Switch 24. Discharge Pressure Transducer
Figure 2-3 Compressor Section
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2.1.5 Air Cooled Condenser Section
The air cooled condenser section (Figure 2-4) consists of the condenser fan, condenser coil, receiver with sight glass/moisture indicator, quench valve, manual liquid
line valve, filter-drier, condenser pressure transducer and fusible plug. The condenser fanpulls air in thebottomof thecoil and it is dischargedhorizontally out through the condenser fan grille.
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1. Grille and Venturi Assembly 2. Condenser Fan 3. Key 4. Condenser Fan Motor 5. Condenser Coil Cover 6. Condenser Coil 7. Condenser Motor Mounting Bracket 8. Receiver
9. Sight Glass 10. Fusible Plug (Rupture Disc -- Alternate) 11. Condenser Pressure Transducer 12. Sight Glass/Moisture Indicator 13. Filter-Drier 14. Liquid Line Service Valve 15. Quench Valve
Figure 2-4 Condenser Section
T-2852-5
2.1.6 Water-Cooled Condenser Section
The water-cooled condenser section (Figure 2-5) consists of a water-cooled condenser, sight glass,
quench expansion valve, rupture disc, condenser pressure transducer, filter-drier, water couplings and water pressure switch. The water cooled condenser replaces the standard unit receiver.
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1011
1. Sight Glass 2. Water-Cooled Condenser 3. Rupture Disc 4. Condenser Pressure Transducer 5. Quench Valve 6. Filter-Drier
7. Liquid Line Service Valve 8. Moisture/Liquid Indicator 9. Coupling (Water In) 10. Self Draining Coupling (Water Out) 11. Water Pressure Switch
Figure 2-5 Water-Cooled Condenser Section
2-6T-285
2.1.7 Control Box Section The control box (Figure 2-6) includes the manual operation switches; circuit breaker (CB-1); compressor, fan and heater contactors; control power transformer; fuses; key pad; display module; current sensor module; controller module and the communications interface module.
2.1.8 Communications Interface Module The communications interface module is a slave module which allow communication with a master central monitoring station. The module will respond to communication and return information over the main power line. Refer to themaster system technicalmanual for further information.
192021 151718
1 2 3 4 5 6
710 922 1114 81213162324
1. Compressor Contactor 2. Heater Contactor 3. Display Module 4. Communications Interface Module 5. Controller/DataCORDER Module (Controller) 6. Key Pad 7. Emergency Defrost Light 8. Start-Stop Switch 9. Remote Monitoring Receptacle 10. Manual Defrost Switch (if equipped) 11. Condenser Fan Switch 12. Emergency Defrost Switch
13. Emergency Defrost Fuse 14. Emergency Bypass Switch 15. Controller Battery Pack 16. Interrogator Connector (Box Location) 17. Control Transformer 18. Evaporator Fan Contactor - E1 19. Evaporator Fan Contactor - S1 20. Evaporator Fan Contactor - S2 or EF 21. Evaporator Fan Contactor - E2 or ES 22. Condenser Fan Contactor 23. Circuit Breaker -- 460V 24. Current Sensor Module
Figure 2-6 Control Box Section
T-2852-7
2.2 REFRIGERATION SYSTEM DATA
Number of Cylinders 6 Model 06DR CFM 41
a Compressor/Motor Weight (Dry) 118 kg (260 lb). Assembly Approved Oil Mobil ST32
Oil Charge 3.6 liters (7.6 U.S. pints)
Oil Sight Glass The oil level range, with the compressor off, should be between the bottom and one-eighth level of the sight glass.
b. Expansion Valve Superheat Verify at --18 _C (0 _F) container box temperature
4.5 to 6.7 _C (8 to 12 _F)
c Heater Termination Thermostat Opens 54 ( 3) _C = 130 ( 5) _F
. Closes 38 ( 4) _C = 100 ( 7) _F
d High Pressure Switch Cutout 25 ( 1.0) kg/cm@ = 350 ( 10) psig
. Cut-In 18 ( 0.7) kg/cm@ = 250 ( 10) psig
Charge Requirements -- R-134a Unit Configuration 2 row
condenser 3 row
condenser 4 row
condenser e. Refrigerant Charge Water-Cooled
Condenser 4.5 kg (9.0 lbs)
4.9 kg (10.75 lbs)
5.2 kg (11.5 lbs)
Receiver 3.7 kg (8.3 lbs)
4.0 kg (8.8 lbs)
4.9 kg (10.8 lbs)
NOTE When replacing the following components (f ) (g ) and (h ) refer to the installation instructions included with. , . . ,
the replacement part for additional information.
f Fusible Plug* Melting point 99 _C = (210 _F)
. Torque* 6.2 to 6.9 mkg (45 to 50 ft-lbs)
g. Sight Glass/Moisture Indicator Torque 8.9 to 9.7 mkg (65 to 70 ft-lbs) Bursts at 35 5% kg/cm@ = (500 5% psig)
h. Rupture Disc Torque (P/N 14-00215-03) 1.4 to 2 mkg (10 to 15 ft-lbs)
i. Condenser Pressure
Condenser Fan Starts The condenser fan will start if the condenser pressure is greater than 14.06 kg/cm@ (200 psig) OR the condenser fan is OFF for more than 60 seconds.
Transducer
Condenser Fan Stops The condenser fan will stop if the condenser pressure is less than 9.14 kg/cm@ (130 psig) AND the condenser fan remains ON for at least 30 seconds.
j. Unit Weight Refer to unit model number plate.
k Water Pressure Switch Cut-In 0.5 0.2 kg/cm@ (7 3 psig)
. Cutout 1.6 0.4 kg/cm@ (22 5 psig)
l. Discharge Pressure Regulator Factory Setting 32.7 2.5 kg/cm@ (72 5.5 psig)
* Rupture Disc, part number 14--00215--04 may be installed as an alternate for the receiver mounted fusible plug.
2-8T-285
2.3 ELECTRICAL DATA CB-1 Trips at 29 amps
a. Circuit Breaker CB-2 (50 amp) Trips at 62.5 amps CB-2 (70 amp) Trips at 87.5 amps
b. Compressor Motor Full Load Amps (FLA) 17.6 amps @ 460 vac
(with current limiting set at 21 amps) 380 vac, Single Phase,
50 hz 460 vac, Single Phase,
60 hz
c. Condenser Fan Full Load Amps 1.3 amps 1.6 amps Motor Horsepower 0.43 hp 0.75 hp
Rotations Per Minute 1425 rpm 1725 rpm Voltage and Frequency 360 -- 460 vac 2.5 hz 400 -- 500 vac 2.5 hz Bearing Lubrication Factory lubricated, additional grease not required. Rotation Counter-clockwise when viewed from shaft end. Number of Heaters 0 or 1
d Drain Pan Heaters Rating 750 watts +5 /--10 % @ 460 vac
. Resistance (cold) 285 7.5% ohms @ 20 _C (68 _F) Type Sheath Number of Heaters 4 or 6
e. Evaporator Coil Rating 750 watts +5/--10% each @ 230 vac Heaters Resistance (cold) 66.8 to 77.2 ohms @ 20 _C (68 _F)
Type Sheath 380 vac/50 hz 460 vac/60 hz
Full Load Amps High Speed 1.6 2.0
Full Load Amps Low Speed 0.8 1.0
Nominal Horsepower High Speed 0.70 0.84
f. Evaporator Fan
Nominal Horsepower Low Speed 0.09 0.11
Motor(s) Rotations Per Minute High Speed 2850 rpm 3450 rpm
Rotations Per Minute Low Speed 1425 rpm 1750 rpm
Voltage and Frequency 360 -- 460 vac 1.25 hz 400 -- 500 vac 1.5 hz Voltage & Frequency us- ing power autotransformer 180 -- 230 vac 1.25hz 200 -- 250 vac 1.5 hz
Bearing Lubrication Factory lubricated, additional grease not required Rotation CW when viewed from shaft end Control Circuit 10 amps (F3) Controller/DataCORDER 5 amps (F1 & F2)
g Fuses Emergency Defrost 5 amps (FED). Drain Line Heater 5 amps (FDH) Humidity Power Transformer 5 amps (FH)
h. Compressor Crankcase Heater 180 watts @ 460 vac
T-2852-9
Orange wire Power Red wire Output Brown wire Ground Input voltage 5 vdc
i Humidity Sensor Output voltage 0 to 3.3 vdc
. Output voltage readings verses relative humidity (RH) percentage:
30% 0.99 V 50% 1.65 V 70% 2.31 V 90% 2.97 V
j. Controller Setpoint Range --30 to +30 _C (--22 to +86 _F)
2.4 SAFETY AND PROTECTIVE DEVICES
Unit components are protected from damage by safety and protective devices listed in the following table. Thesedevicesmonitor theunit operating conditions and open a set of electrical contacts when an unsafe condition occurs. Open safety switch contacts on either or both of devices
IP-CP or HPS will shut down the compressor.
Open safety switch contacts on device IP-CM will shut down the condenser fan motor.
The entire refrigeration unit will shut down if one of the following safety devices open: (a) Circuit Breaker(s); (b) Fuse (F3/15A); or (c) Evaporator Fan Motor Internal Protector(s) -- (IP-EM).
Table 2-1 Safety and Protective Devices
UNSAFE CONDITION SAFETY DEVICE DEVICE SETTING
Circuit Breaker (CB-1) -- Manual Reset Trips at 29 amps (460 vac)
Excessive current draw Circuit Breaker (CB-2, 50 amp) --Manual Reset Trips at 62.5 amps (230 vac)
Circuit Breaker (CB-2, 70 amp) --Manual Reset Trips at 87.5 amps (230 vac)
Excessive current draw in the control circuit Fuse (F3) 10 amp rating
Excessive current draw by the controller Fuse (F1 & F2) 5 amp rating
Excessive current draw by the emergency defrost circuit Fuse (FED) 5 amp rating
Excessive condenser fan mo- tor winding temperature Internal Protector (IP-CM) -- Automatic Reset N/A
Excessive compressor motor winding temperature Internal Protector (IP-CP) -- Automatic Reset N/A
Excessive evaporator fan mo- tor(s) winding temperature Internal Protector(s) (IP-EM) -- Automatic Reset N/A
Abnormal pressures/tempera- tures in the high refrigerant side
Fusible Plug -- Used on the Receiver
Rupture Disc -- Used on the Water-Cooled Con- denser
99 _C = (210 _F)
35 kg/cm@ = (500 psig)
Abnormally high discharge pressure High Pressure Switch (HPS) Opens at 25 kg/cm@
(350 psig)
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2.5 REFRIGERATION CIRCUIT
Starting at the compressor, (see Figure 2-7 upper schematic) the suction gas is compressed to a higher pressure and temperature.
The gas flows through the discharge service valve into the pressure regulator valve. During periods of low ambient operation, the pressure regulator valve modulates the flow of refrigerant to maintain a pre set minimum discharge pressure. Refrigerant gas then moves into the air-cooled condenser. When operating with the air-cooled condenser active, air flowing across the coil fins and tubes cools the gas to saturation temperature. By removing latent heat, the gas condenses to a high pressure/high temperature liquid and flows to the receiver which stores the additional charge necessary for low temperature operation.
When operating with the water cooled condenser active (see Figure 2-7, lower schematic), the refrigerant gas passes through the air cooled condenser and enters the water cooled condenser shell. The water flowing inside the tubing cools the gas to saturation temperature in the same manner as the air passing over the air cooled condenser. The refrigerant condenses on the outside of the tubes and exits as a high temperature liquid. The water cooled condenser also acts as a receiver, storing excess refrigerant.
The liquid refrigerant continues through the liquid line service valve, the filter-drier (which keeps refrigerant clean and dry), and a heat exchanger (that increases subcooling of the liquid) to the thermostatic expansion valve. As the liquid refrigerant passes through the variable orifice of the expansion valve, some of it vaporizes into a gas (flash gas). Heat is absorbed from the return air by the balance of the liquid, causing it to vaporize in the evaporator coil. The vapor then flows through the suctionmodulating valve to thecompressor.
The thermostatic expansion valve is activated by the bulb strapped to the suction line near the evaporator
outlet. The valve maintains a constant superheat at the coil outlet regardless of load conditions. During periods of low load, the suction modulating valve decreases flow of refrigerant to the compressor. This action balances the compressor capacity with the load and prevents operation with low coil temperatures. In this mode of operation, the quench valve will open as required to provide sufficient liquid refrigerant flow into the suction line for cooling of the compressor motor. The quench valve senses refrigerant condition entering the compressor andmodulates the flow to prevent entrance of liquid into the compressor. The refrigeration system is also fitted with a condenser pressure transducer which feeds information to the controller. When operating on the air cooled condenser, the controller programming will operate the condenser fan so as to attempt to maintain discharge pressures above 130 psig in low ambients. At ambients below 27_C (80_F), the condenser fan will cycle on and off depending on condenser pressure and operating times. 1 The condenser fan will start if the condenser pres-
sure is greater than 200 psig OR the condenser fan has been OFF for more than 60 seconds.
2 The condenser fan will stop if the condenser pres- sure is less than 130 psig AND the condenser fan has been running for at least 30 seconds.
At ambients above 27_C (80_F), condenser pressure control is disabled and the condenser fan runs continuously. On systems fitted with a water pressure switch, the condenser fan will be off when there is sufficient pressure to open the switch. If water pressure drops below the switch cut out setting, the condenser fan will be automatically started. When operating a system fittedwith a condenser fan switch, the condenser fanwill be off when the switch is placed in the O position. The condenser fanwill be onwhen the switch is placed in the I position.
T-2852-11
FILTER DRIER
TXV
TXV BULB
MODULATING VALVE
PRESSURE TRANSDUCER
HEAT EXCHANGER
SIGHT GLASS
FILTER DRIER
HEAT EXCHANGER
MODULATING VALVE
PRESSURE TRANSDUCER
SIGHT GLASS
FUSIBLE PLUG
RECEIVER
SERVICE VALVE
WATER-COOLED CONDENSER
PRESSURE REGULATOR
TXV
TXV BULB
EVAPORATOR
CONDENSER
PRESSURE TRANSDUCER
SERVICE VALVE
PRESSURE REGULATOR
EVAPORATOR
CONDENSER
SERVICE VALVE
SERVICE VALVE
Circuit with Receiver
QUENCH VALVE
QUENCH VALVE
Circuit with Water Cooled Condenser
FUSIBLE PLUG
Discharge Liquid Suction
Legend
Figure 2-7 Refrigeration Circuit Schematic
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SECTION 3
MICROPROCESSOR 3.1 TEMPERATURE CONTROL MICROPRO-
CESSOR SYSTEM
The temperature control Micro-Link 2i microprocessor system (see Figure 3- 1) consists of a key pad, display module, control module (controller) and interconnecting wiring. The controller houses the temperature control software and the DataCORDER Software. The temperature control software functions to operate the unit components as required to provide the desired cargo temperature and humidity. The DataCORDER software functions to record unit operating parameters
and cargo temperature parameters for future retrieval. Coverage of the temperature control software begins with paragraph 3.2. Coverage of the DataCORDER software is provided in paragraph 3.6.
The key pad and display module serve to provide user access and readouts for both of the controller functions, temperature control and DataCORDER. The functions are accessed by key pad selections and viewed on the display module. The components are designed to permit ease of installation and removal.
TO DISPLAY
CONTROL MODULE DISPLAY MODULE
KEY PAD
CONFIGURATION SOFTWARE
CONFIGURATION VARIABLE (CnF##)
TEMPERATURE CONTROL SOFTWARE
ALARMS (AL<70)
PRE--TRIP INTERROGATION CONNECTOR
DATAREADER
Computer Device With DataLine
Software
DataCORDER SOFTWARE
OPERATIONAL SOFTWARE
FUNCTION CODE (Cd)
TO DISPLAY
CONFIGURATION SOFTWARE
CONFIGURATION VARIABLE
(dCF## read only)
ALARMS (AL>69)
DATA STORAGE MEMORY
OPERATIONAL SOFTWARE
FUNCTION CODE (dC)
TO DISPLAY
(Scrollback)
Figure 3- 1 Temperature Control System
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3.1.1 Key Pad The key pad (Figure 3- 2) is mounted on the right-hand side of the control box. The key pad consists of eleven push button switches that act as the users interface with the controller. Descriptions of the switch functions are provided in Table 3-1.
ENTER
BATTERY
POWER
MANUAL DEFROST/
INTERVAL
CODE
SELECT
PRE
TRIP
ALARM
LIST
ALT.
MODE
RETURN
SUPPLY
_C
_F
Figure 3- 2 Key Pad
COOL HEAT DEFROSTIN RANGEALARM SUPPLY RETURN
SETPOINT/Code AIR TEMPERATURE/Data
Figure 3- 3 Display Module 3.1.2 Display Module The display module (Figure 3- 3) consists of five digit displays and seven indicator lights. The indicator lights include: 1. Cool -- White LED: Energized when the refrigerant
compressor is energized. 2. Heat -- OrangeLED: Energized to indicate heaterop-
eration in the heat or defrost mode. 3. Defrost -- Orange LED: Energizedwhen the unit is in
the defrost mode. 4. In-Range -- Green LED: Energized when the con-
trolled temperature probe iswithin specified tolerance of set point.
NOTE The controlling probe in the perishable range is the SUPPLY air probe and the controlling probe in the frozen range is the RETURN air probe.
Table 3-1 Key Pad Function
KEY FUNCTION
Code Select Accesses function codes.
Pre-Trip Displays the pre-trip selection menu. Discontinues pre-trip in progress.
Alarm List Displays alarm list and clears the alarm queue .
Manual Defrost/ Interval
Displays selected defrost mode. De- pressing and holding the Defrost in- terval key for five (5) seconds will ini- tiate defrost using the same logic as if the optional manual defrost switch was toggled on. The Manual Defrost function can also be selected by simultaneously press- ing and holding the Pre--Trip and Alt. Mode buttons.
Enter Confirms a selection or saves a selection to the controller
Arrow Up Change or scroll a selection upward Pre-trip advance or test interruption.
Arrow Down Change or scroll a selection down- ward. Pre-trip repeat backward
Return/ Supply
Displays non-controlling probe tem- perature (momentary display).
_C/_F
Displays alternate English/Metric scale (momentary display). When set to _F, pressure is displayed in psig and vacuum in /hg. P appears after the value to indicate psig and i ap- pears for inches of mercury. When set to _C. pressure readings are in bars. b appears after the val- ue to indicate bars.
Battery Power
Initiate battery backup mode to allow set point and function code selection if AC power is not connected.
ALT. Mode
This key is pressed to switch the functions from the temperature soft- ware to the DataCORDER Software. The remaining keys function the same as described above except the readings or changes are made to the DataCORDER programming.
5. Supply -- Yellow LED: Energized when the supply air probe is used for control.When this LED is illuminated, the temperature displayed in the AIRTEMPERATURE display is the reading at the supply air probe. This LED will flash if dehumidification or humidification is en- abled.
6. Return -- Yellow LED: Energized when the return air probe is used for control.When this LED is illuminated, the temperature displayed in the AIRTEMPERATURE display is the reading at the return air probe. This LED will flash if dehumidification or humidification is en- abled.
7. Alarm -- Red LED: Energizedwhen there is an active or an inactive shutdown alarm in the alarm queue.
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81 2 3 3 3 3 34 5 6 7
1. Mounting Screw 2. Micro-Link 2i
Controller 3. Connectors 4. Test Points
5. Fuses 6. Control Circuit Power Connection
(Location: In back of controller) 7. Software Programming Port 8. Battery Pack
Figure 3- 4 Micro-Link 2i Controller 3.1.3 Controller
CAUTION Do not remove wire harnesses from con- troller unless you are grounded to the unit frame with a static safe wrist strap.
CAUTION Unplug all controller wire harness connec- tors before performing arc welding on any part of the container.
NOTE Do not attempt to service the controller. Break- ing the seal will void the warranty.
The Micro--Link 2i controller is a single module microprocessor as shown in Figure 3- 4. It is fitted with test points, harness connectors and a software card programming port.
3.2 CONTROLLER SOFTWARE
The controller software is a custom designed program that is subdivided into the Configuration Software and the Operational Software. The controller software performs the following functions:
a. Control supply or return air temperature to required limits, provide modulated refrigeration control, elec- tric heat control and defrost. Defrost is performed to clear build up of frost and ice from the coil to ensure continuous conditioned air delivery to the load.
b. Providedefault independent readouts of set point and supply or return air temperatures.
c. Provide ability to read and (if applicable) modify the Configuration Software Variables, Operating Soft- ware Function Codes and Alarm Code Indications.
d. ProvideaPre-Trip step-by-step checkout of refrigera- tion unit performance including: proper component operation, electronic and refrigeration control opera- tion, heater operation, probe calibration, pressure limiting and current limiting settings.
e. Provide battery powered ability to access or change selected codes and set point without AC power con- nected
f. Provide the ability to reprogram the software through the use of a memory card. The memory card auto- matically downloads new software to the controller when inserted.
3.2.1 Configuration Software (Configuration Variables)
The Configuration Software is a variable listing of the components available for use by the Operational Software. This software is factory installed in accordance with the equipment fitted and options listed on the original purchase order. Changes to the Configuration Software are required only when the original software has been lost or a physical change has beenmade to the unit such as the addition or removal of an option. A Configuration Variable list is provided in Table 3-4 . Change to the factory installedConfiguration Software is achieved via a configuration card. 3.2.2 Operational Software (Function Codes) The Operational Software is the actual operation programming of the controller which activates or deactivates components in accordancewith current unit operation conditions and operator selected modes of operation. The programming is divided into function codes. Some of the codes are read only while the remaining codes may be user configured. The value of the user configurable codes can be assigned in accordance with user desired mode of operation. A list of the function codes is provided in Table 3-5 . To access the function codes, perform the following: a. Press the CODE SELECT key, then press an arrow key until the left window displays the desired code number.
b. The right window will display the value of this item for five seconds before returning to the normal display mode.
c. If a longer time is desired, press the ENTER key to extend the time to 30 seconds.
3.3 MODES OF OPERATION The Operational Software responds to various inputs. These inputs come from the temperature and pressure sensors, the temperature set point, the settings of the the configuration variables and the function code assignments. The action taken by the Operational
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Software will change if any one of the inputs changes. Overall interaction of the inputs is describedas a mode of operation. The modes of operation include, perishable (chill) mode and frozen mode. Descriptions of the controller interaction and modes of operation are provided in the following sub paragraphs.
3.3.1 Temperature Control -- Perishable Mode
With configuration variable CnF26 (Heat Lockout Temperature) set to --10_C the perishable mode of operation is activewith set pointsabove --10_C(+14_F). With the variable set to --5_C, the perishable mode is active below --5_C (+23_F). Refer to Table 3-4.
When in the perishable mode the controller maintains the supply air temperature at set point, the SUPPLY indicator light will be illuminated on the display module and the default reading on the display windowwill be the supply temperature sensor reading. When the supply air temperature enters the in-range temperature tolerance (as selected at function code Cd30), the in-range light will energize.
3.3.2 Evaporator Fan Operation
Opening of an evaporator fan internal protector will shut down a unit with Normal Evaporator Fan Operation. (CnF32 set to 2EFO). On units equipped with Single Evaporator Fan Capability (CnF32 set to 1EFO) additional relays are installed to allow the unit to continue to operate on a single fan. Refer to Table 3-4.
3.3.3 Defrost Interval
Controller function code Cd27 sets two modes for defrost initiation, either user--selected timed intervals or automatic control. The user--selected values are 3, 6, 9, 12, or 24 hours. The factory default for the timed interval is 12 hours.
All defrost interval times reflect the number of compressor runtime hours since the last defrost de--ice cycle. The minimum defrost interval under the automatic setting is 3 hours while the maximum is 24. Refer to Table 3-5.
Defrost interval time is not accumulated in any mode until the defrost termination sensor reads less than 10_C (50_F).
When the unit is set to automatic control and in perishable mode, perishable--pulldown mode, or frozen--pulldown mode, defrost starts with an initial defrost set to 3 hours and then adjusts the interval to the next defrost based on the accumulation of ice on the evaporator coil. In this way, defrosts are scheduled to occur only when necessary.
Once setpoint has been reached in frozenoperation, the automatic control selectionwill set the time interval to 12 hours for the first two defrosts once the return probe is reading below the frozen setpoint and then adjust to 24 hours thereafter.
3.3.4 Failure Action
Function code Cd29 may be operator set to allow continued operation in the event the control sensors are reading out of range. The factory default is full system shutdown. Refer to Table 3-5.
3.3.5 Generator Protection
Function codes Cd31 and Cd32 may be operator set to control start up sequenceof multiple units andoperating
current draw. The factory default allows on demand starting of units and full current draw. Refer toTable 3-5. 3.3.6 Condenser Pressure Control When configuration variable CnF14 is set to In the condenser pressure control logic is activated to maintain discharge pressures above 130 psig in low temperature ambients. The logic turns the condenser fan on or off in accordance with the condenser pressure transducer reading. Refer to Table 3-4. The function is enabled when the following conditions are met: 1. The ambient sensor reading is less than or equal to
27_C (80_F) 2. Voltage/Frequency ratio is less than or equal to 8.38 When the above conditions are met, either pressures or timersmay dictate a changeof state fromOFF toON, or ON to OFF. If the condenser fan is OFF, it will be energized if saturated condensing pressure is greater than 200 psigOR if the condenser fan has beenOFF for a variable time period of up to sixty seconds depending on the ambient temperature. As the ambient temperature increases, the amount of time that the condenser fan is energized will correspondingly increase towards the maximum If the condenser fan is ON, it will de-energize only if the saturated condensing pressure is less than 130 psig and the condenser fan has been running for a minimum of thirty seconds depending on the ambient temperature. 3.3.7 Arctic Mode With arctic mode enabled, (configuration variable CnF29 set to In) there will be a 30minute time delay at startup if the ambient is colder than --10.0_C. (14 F) When the START/STOP switch is placed in the I (ON) position the controller will energize the compressor crankcase heater . Operation of the heaterwill warm the oil and boil off any liquid refrigerant that may be present in the crankcase. If Pre-Trip is initiated during the 30 minute time period, Pre-Trip will be allowed to run normally. Once Pre-Trip is over, the controller will revert to its normal control mode logic. Refer to Table 3-4. 3.3.8 Perishable Mode -- Conventional The unit is capable of maintaining supply air temperature to within 0.25_C (0.5_F) of set point. Supply air temperature is controlled by positioning of the suction modulation valve (SMV), cycling of the compressor and cycling of the heaters. Whenpulling down froma temperature that is more than 5_C (9_F) above set point, the SMV will open to reduce the pulldown time. However, pressure and current limit functions may restrict the valve, if either exceeds the preset value. The Operational Software is designed so the SMV will begin to close as the set point is reached. The SMV will continue to close and restrict refrigerant flow until the capacity of the unit and the load are balanced. If the temperature drops below the set point, the compressor will remain running for a few minutes. This is to accommodate any initial undershoot which might occur. After this time has expired and the temperature is 0.2_C (0.4_F) or greater below the set point, the compressor will be turned OFF. If the temperature drops to 0.5_C (0.9_F) below set point, the heaters will be energized . The heaters will
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de-energize when the temperature rises to 0.2_C (0.4_F) below the set point. The compressor will not restart until the temperature rises to 0.2_C (0.4_F) above the set point and three minutes have elapsed since the last compressor turn off. 3.3.9 Perishable Mode -- Economy The economymode is an extension of the conventional mode and is applicable to units with two speed evaporator fan motors. Themode is activated when the setting of function codeCd34 is ON. Economymode is provided for power saving purposes. Economy mode could be utilized in the transportation of temperature tolerant cargo or non-respiration items which do not require high airflow for removing respiration heat. There is no active display indicator that economy mode has been activated. To check for economy mode, perform a manual display of code Cd34. In order to achieve economy mode, a perishable set point must be selected prior to activation. When economy mode is active, the evaporator fans will be controlled as follows: At the start of each cooling or heating cycle, the evaporator fans will be run in high speed for three minutes. They will then be switched to low speed any time the supply air temperature is within 0.25_C (0.45_F) of the set point and the return air temperature is less than or equal to the supply air temperature + 3_C (5.4_F). The fans will continue to run in low speed for one hour. At the end of the hour, the evaporator fans will switch back to high speedand the cyclewill be repeated. 3.3.10 Perishable Mode -- Dehumidification The dehumidification mode is provided to reduce the humidity levels inside the container. The mode is activated when a humidity value is set at at function code Cd33. The display module SUPPLY led will flash ON and OFF every second to indicate that the dehumidification mode is active. Once the Mode is active and the following conditions are satisfied, the controller will activate the heat relay to begin dehumidification. 1. The humidity sensor reading is above the set point. 2. The Supply air temperature is less than 0.25_C
above set point. 3. The heater debounce timer (three minutes) has
timed out. 4. Heater termination thermostat (HTT) is closed. If the above conditions remain true for at least one hour the evaporator fans will switch from high to low speed operation. The evaporator fan speed will switch every hour thereafter as long as all conditions are met (see Bulb Mode section for different evaporator fan speed options). If any condition except for item (1) becomes false OR if the relative humidity sensed is 2% below the dehumidification set point, the high speed evaporator fans will be energized. In the dehumidification mode power is applied to the defrost and drain pan heaters. This added heat load causes the controller to open the suction modulating valve tomatch the increased heat loadwhile still holding the supply air temperature very close to the set point. Opening the modulating valve reduces the temperature of the evaporator coil surface, which increases the rate at which water is condensed from the passing air. Removing water from the air reduces the relative
humidity. When the relative humidity sensed is 2% below the set point , the controller de-energizes theheat relay. The controller will continue to cycle heating to maintain relative humidity below the selected set point. If the mode is terminated by a condition other than the humidity sensor, e.g., an out-of-range or compressor shutdown condition, the heat relay is de-energized immediately.
Two timers are activated in the dehumidification mode to prevent rapid cycling and consequent contactorwear. They are:
1. Heater debounce timer (three minutes).
2. Out-of-range timer (five minutes).
The heater debounce timer is started whenever the heater contactor status is changed. The heat contactor remains energized (or de-energized) for at least three minutes even if the set point criteria are satisfied.
The out-of-range timer is started to maintain heater operation during a temporary out-of-range condition. If the supply air temperature remains outside of the user selected in-range setting for more than fiveminutes, the heaters will be de-energized to allow the system to recover. The out-of-range timer starts as soon as the temperature exceeds the in-range tolerance value set by function code Cd30.
3.3.11 Perishable, Dehumidification -- Bulb Mode
Bulbmode is an extension of the dehumidificationmode which allows changes to the evaporator fan speed and/or defrost termination set points.
Bulbmode is activewhenconfiguration codeCd35 is set to Bulb. Once thebulbmode is activated, the usermay then change the dehumidification mode evaporator fan operation from the default (speed alternates from low to high each hour) to constant low or constant high speed. This is done by toggling function code Cd36 from its default of alt to Lo or Hi as desired. If low speed evaporator fan operation is selected, this gives the user the additional capability of selecting dehumidification set points from 60 to 95% (instead of the normal 65 to 95%).
In addition, if bulb mode is active, function code Cd37 may be set to override the previous defrost termination thermostat settings. (Refer to paragraph 4.10.4) The temperature at which thedefrost termination thermostat will be considered open may be changed [in 0.1_C (0.2_F) increments] to any value between 25.6_C (78_F) and 4_C (39.2_F). The temperature at which the defrost termination thermostat is considered closed for interval timer start or demand defrost is 10_C (50_F) for open values from 25.6_C down to a 10_C setting. For open values lower than 10_C, the closed values will decrease to the same value as the open setting.
Bulb mode is terminated when:
1. Bulb mode code Cd35 is set to Nor.
2. Dehumidification code Cd33 is set to Off.
3. The user changes the set point to one that is in the frozen range.
When bulb mode is disabled by any of the above, the evaporator fan operation for dehumidification reverts to alt and the DTS termination setting resets to the value determined by controller configuration variable CnF41.
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3.3.12 Temperature Control -- Frozen Mode
With configuration variable CnF26 set to --10_C the frozen mode of operation is active with set points at or below --10_C (+14_F).With the variable set to --5_C, the frozen mode is active at or below --5_C (+23_F).
When in the frozen mode the controller maintains the return air temperature at set point, the RETURN indicator light will be illuminated on the display module and the default reading on the display windowwill be the return air probe reading.
When the return air temperature enters the in-range temperature tolerance as selected at function code Cd30, the in-range light will energize.
3.3.13 Frozen Mode -- Conventional
Frozen range cargos are not sensitive to minor temperature changes. The method of temperature control employed in this range takes advantage of this fact to greatly improve the energy efficiency of the unit. Temperature control in the frozen range is accomplished by cycling the compressor on and off as the load demand requires. The unit will operate in the conventional frozen mode when the controller set point is at or below the frozen range and function code CD34 is set to OFF
If the return air temperature in the container drops 0.2_C (0.4_F) below the set point, the compressor is cycled off. When the temperature is greater than 0.2_C (0.4_F) above the set point and the three minute time delay has been met, the compressor will restart. The unit will always operate at full capacity, and the suction modulation valve will open as allowed by current and pressure limiting.
NOTE Onstart upof theunit, SMVwill reset to aknown open position. This is accomplished by assum- ing the valve was fully open, driving it fully closed, resetting the percentage open to zero, then opening to a known 21% staging position.
To prevent rapid cycling of the compressor, a three minute compressor off timemust be satisfied before the compressor will restart. Under a condition of rapidly changing return air temperature, the time delay may allow the return air temperature to rise slightly above set point temperature before the compressor can restart.
3.3.14 Frozen Mode -- Economy
In order to activate economy frozen mode operation, a frozen set point temperature must be selected. The economymode is active when function codeCd34 is set to ON. When economy mode frozen is active, the system will perform normal frozen mode operations except that the entire refrigeration system, excluding the controller, will be turned off when the control temperature is less than or equal to the set point -- 2_C. After an off-cycle period of 60 minutes, the unit will turn on high speed evaporator fans for three minutes, and then check the control temperature. If the control temperature is greater than or equal to the set point + 0.2_C., the unit will restart the refrigeration system and continue to cool until the previously mentioned off-cycle temperature criteria are met. If the control temperature is less than the set point + 0.2_C, the unit will turn off the evaporator fans and restart another 60minute off-cycle.
3.4 CONTROLLER ALARMS
Alarm display is an independent controller software function. If an operating parameter is outside of expected range or a components does not return the correct signals back to the controller an alarm is generated. A listing of the alarms is provided in Table 3-6.
The alarm philosophy balances the protection of the refrigeration unit and that of the refrigerated cargo. The action takenwhen anerror is detected always considers the survival of the cargo. Rechecks aremade to confirm that an error actually exists.
Some alarms requiring compressor shutdown have time delays before and after to try to keep the compressor on line. An example is alarm code LO, (low main voltage), when a voltage drop of over 25% occurs, an indication is given on the display, but the unit will continue to run.
An alarm is indicated by flashing an alarm code on the display panel, and for some alarms, by the alarm light illuminating.
When an Alarm Occurs:
a. The red alarm light will illuminate for 20 series alarms, and alarm code number AL55.
b. If a detectable problem is found to exist, its alarm codewill be alternately displayedwith the set point on the left display.
c. The user should scroll through the alarm list to deter- mine what alarms exist or have existed. Alarms must bediagnosedandcorrectedbefore theAlarm List can be cleared.
To Display Alarm Codes :
a. While in the Default Display mode, press the ALARM LIST key. This accesses theAlarmList DisplayMode, which displays any alarms archived in the Alarm Queue.
b. The alarm queue stores up to 16 alarms in the se- quence in which they occurred. The user may scroll through the list by depressing an ARROW key.
c. The left display will show AL##, where ## is the alarm number sequentially in the queue.
d. The right display will show the actual alarm code. AA## will display for an active alarm, where ## is the alarm code. Or IA## will display for an inactive alarm, See Table 3-6.
e. END is displayed to indicate the end of the alarm list if any alarms are active.
f. CLEAr is displayed if all alarms are inactive. The alarmqueuemay thanbe clearedby pressing theEN- TER key. The alarm list will clear and -- -- -- -- -- will be displayed.
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3.5. UNIT PRE-TRIP DIAGNOSTICS Pre--Trip Diagnostics is an independent controller function which will suspend normal refrigeration controller activities and provide preprogrammed test routines. The test routines include Auto Mode testing, which automatically preforms a pre programmed sequenced of tests, or Manual Mode testing, which allows the operator to select and run any of the individual tests.
CAUTION Pre-trip inspection should not be per- formed with critical temperature cargoes in the container.
CAUTION When Pre-Trip key is pressed, dehumidifi- cation and bulb mode will be deactivated. At the completion of Pre-Trip activity, dehu- midification and bulb mode must be reacti- vated.
Testing may be initiated by use of the Key Pad or via communication, but when initiated by communication the controller will execute the entire battery of tests (auto mode). At the end of a pre-trip test, the message P, rSLts (pretest results) will be displayed. Pressing the ENTER key will allow the user to see the results for all subtests. The results will be displayed as PASS or FAIL for all the tests run to completion. A detailed description of thepre-trip tests and test codes is provided in Table 3-7, page 3-20. detailed operating instructions are provided in paragraph 4.8.
3.6 DataCORDER 3.6.1 Description The Carrier Transicold DataCORDER, software is integrated into the controller and serves to eliminate the temperature recorder and paper chart. The DataCORDER functions may be accessed by key pad selections and viewedon thedisplaymodule. The unit is also fitted with interrogation connections which may be used with the Carrier Transicold Data Reader to down load data. A personal computer with Carrier Transicold Data View software may also be used to download data and configure settings. The DataCORDER consists of:
Configuration Software Operational Software Data Storage Memory Real Time Clock (with internal battery backup) Six thermistor inputs Interrogation Connections Power supply (battery pack).
The DataCORDER performs the following functions:
a. Logs data at 15, 30, 60 or 120 minute intervals and stores twoyears of data (basedonone hour interval).
b. Records and displays alarms on the display module.
c. Records results of pre--trip testing.
d. Records DataCORDER and temperature control software generated data and events as follows: Container ID Change Software Upgrades Alarm Activity Battery Low (Battery Pack) Data Retrieval Defrost Start and End Dehumidification Start and End Power Loss (w/wo battery pack) Power Up (w/wo battery pack) Remote Probe Temperatures in the Container (USDA Cold treatment and Cargo probe recording) Return Air Temperature Set Point Change Supply Air Temperature Real Time Clock Battery (Internal Battery) Replace- ment Real Time Clock Modification Trip Start ISO Trip Header (When entered via Interrogation program) Economy Mode Start and End Auto 2 Pre-Trip Start and End Bulb Mode Start Bulb Mode changes Bulb Mode End USDA Trip Comment Humidification Start and End USDA Probe Calibration
3.6.2 DataCORDER Software
The DataCORDER Software is subdivided into the Configuration Software, Operational Software and the Data Memory.
a. Operational Software
The Operational Software reads and interprets inputs for use by the Configuration Software. The inputs are labeled Function Codes. There are 35 functions (see Table 3-8, page 3-24) which the operator may access to examine the current input data or storeddata. Toaccess these codes, do the following:
1 Press the ALT. MODE & CODE SELECT keys.
2 Press an arrow key until the left window displays the desired code number. The right window will display the value of this item for five seconds before returning to the normal display mode.
3 If a longer time is desired, press the ENTER key to extend the time to 30 seconds.
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Table 3-2 DataCORDER Configuration Variables
CONFIGURATION NO. TITLE DEFAULT OPTION dCF01 (Future Use) ---- ---- dCF02 Sensor Configuration 2 2,5,6,9,54,64,94 dCF03 Logging Interval (Minutes) 60 15,30,60,120 dCF04 Thermistor Format Short Low, Normal dCF05 Thermistor Sampling Type A A,b,C dCF06 Controlled Atmosphere/Humidity Sampling Type A A,b dCF07 Alarm Configuration USDA Sensor 1 A Auto, On, Off dCF08 Alarm Configuration USDA Sensor 2 A Auto, On, Off dCF09 Alarm Configuration USDA Sensor 3 A Auto, On, Off dCF10 Alarm Configuration Cargo Sensor A Auto, On, Off
b. Configuration Software
The configuration software controls the recording and alarm functions of the DataCORDER. Reprogramming to the factory installed configuration is achieved via the same configuration card as the unit control module software. Changes to the software may be made made using the Data View integration device. A listing of the configuration variables is provided in Table 3-2. Descriptions of DataCORDER operation for each variable setting are provided in the following paragraphs.
3.6.3 Sensor Configuration (dCF02)
Two modes of operation may be configured, the Standard Mode and the Generic Mode.
a. Standard Mode
In the standard mode, the user may configure the DataCORDER to record data using one of seven standard configurations. The seven standard configuration variables, with their descriptions, are listed in Table 3-3. The six thermistor inputs (supply, return, USDA #1, #2, #3 and cargo probe) and the humidity sensor input will be generated by the DataCORDER. An example of a report using a standard configuration is shown in Figure 3- 5.
NOTE The DataCORDER software uses the supply and return recorder sensors. The temperature control software uses the supply and return temperature sensors.
b. Generic Mode
The generic recordingmode allows user selection of the network data points to be recorded. Theuser may select up to a total of eight data points for recording. A list of the data points available for recording follows. Changing the configuration to generic and selectingwhich data points to recordmay be doneusing theCarrier TransicoldData Retrieval Program.
1. Control mode 2. Control temperature 3. Frequency 4. Humidity
5. Phase A current 6. Phase B current 7. Phase C current 8. Main voltage 9. Suction modulation valve percentage 10. Discrete outputs (Bit mapped -- require special
handling if used) 11. Discrete inputs (Bit mapped -- require special
handling if used) 12. Ambient sensor 13. Compressor suction sensor 14. Compressor discharge sensor 15. Return temperature sensor 16. Supply temperature sensor 17 Defrost temperature sensor 18. Discharge pressure transducer 19. Suction pressure transducer 20. Condenser pressure transducer
Table 3-3 DataCORDER Standard Configurations
Standard Config. Description
2 sensors (dCF02=2) 2 thermistor inputs(supply & return)
5 sensors (dCF02=5)
2 thermistor inputs(supply & return) 3 USDA thermistor inputs
6 sensors (dCF02=6)
2 thermistor inputs(supply & return) 3 USDA thermistor inputs 1 humidity input
9 sensors (dCF02=9) Not Applicable
6 sensors (dCF02=54)
2 thermistor inputs(supply & return) 3 USDA thermistor inputs 1 cargo probe (thermistor input)
7 sensors (dCF02=64)
2 thermistor inputs(supply & return) 3 USDA thermistor inputs 1 humidity input 1 cargo probe (thermistor input)
10 sensors (dCF02=94)
2 thermistor inputs(supply & return) 3 USDA thermistor inputs 1 humidity input 1 cargo probe (thermistor input) 3 C.A. inputs (NOT APPLICABLE)
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Raw Data Report for ABC1234567 May 31, 2001 to Jun 04, 2001
System Configuration at the Time of Interrogation:
Interrogated On Sept 05, 2001 Extracted by DataLine Rev 1.0.0
Controller Software: 5120 Controller Serial #: 04163552
Bill of Lading #: 1 Origin: Origin Date: Destination: Discharge Date: Comment: DataLine Tool
Probe Calibration Readings: USDA1: 0.0 USDA2: 0.0 USDA3: 0.0 Cargo: 0.0 Temperature Units: Centigrade ________________________________________________________________________________________
May 31, 2001
Setpoint: 1.66, Container : Serial : 04189552
9 Sensors Logged at 15 Minute Interval
Sensor Format Resolution
Figure 3- 5 Standard Configuration Report
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3.6.4 Logging Interval (dCF03) The user may configure four time intervals between data recordings. Data is logged at exact intervals in accordancewith the real time clock. The clock is factory set at Greenwich Mean Time. 3.6.5 Thermistor Format (dCF04) The user may configure the format in which the thermistor readings are recorded. The low resolution is a 1 byte format and the normal resolution is a 2 byte format. The low requires less memory and records temperature in 0.25C (0.45F) steps when in the perishable mode or 0.5C (0.9F) steps when in the frozen mode. The normal records temperature in 0.01C (0.02F) steps for the entire range. 3.6.6 Sampling Type (dCF05 & dCF06) Three types of data sampling are available, average, snapshot and USDA. When configured to average, the average of readings taken every minute over the recording period is recorded. When configured to snapshot, the sensor reading at the log intervale time is recorded. When USDA is configured the supply and return temperature readings are averaged and the 3 USDA probe readings are snapshot. 3.6.7 Alarm Configuration (dCF07 -- dCF10) The USDA and cargo probe alarms may be configured to OFF, ON or AUTO. If a probe alarm is configured to OFF, then the alarm for this probe is always disabled. If a probealarm is configured toON, then theassociated alarm is always enabled. If the probes are configured to AUTO, they act as a group. This function is designed to assist users who keep their DataCORDER configured for USDA recording, but donot install the probes for every trip. If all the probes are disconnected, no alarms are activated. As soon as one of the probes is installed , then all of the alarms are enabled and the remaining probes that are not installed will give active alarm indications. The DataCORDER will record the initiation of a pre-trip test (refer to paragraph 3.5) and the results of each of the tests included in pre--trip. The data is time-stamped and may be extracted via the Data Retrieval program. Refer to Table 3-9 for a description of the data stored in theDataCORDER for each correspondingPre-Trip test. 3.6.8 DataCORDER Power-Up The DataCORDER may be powered up in any one of four ways: 1. Normal AC power: The DataCORDER is powered up when the unit is turned on via the stop-start switch. 2. Controller DC battery pack power: If a battery pack is installed, the DataCORDER will power up for communication when an interrogation cable is plugged into an interrogation receptacle. 3. External DC battery pack power: A 12 volt battery pack may also be plugged into the back of the interrogation cable, which is then plugged into an interrogation port. No controller battery pack is required with this method.
4. Real Time Clock demand: If the DataCORDER is equipped with a charged battery pack and AC power is not present, the DataCORDER will power up when the real time clock indicates that a data recording should take place. When the DataCORDER is finished recording, it will power down. During DataCORDER power-up, while using battery-pack power, the controller will perform a hardware voltage check on the battery. If the hardware check passes, theController will energize and performa
software battery voltage check before DataCORDER logging. If either test fails, the real time clock battery power-up will be disabled until the next AC power cycle. Further DataCORDER temperature logging will be prohibited until that time. An alarm will be generated when the battery voltage transitions from good to bad indicating that the battery pack needs recharging. If the alarm condition persists for more than 24 hours on continuous AC power, the battery pack needs replacement. 3.6.9 Pre-Trip Data Recording The DataCORDER will record the initiation of a pre-trip test (refer to paragraph 3.5) and the results of each of the tests included in pre--trip. The data is time-stamped and may be extracted via the Data Retrieval program. Refer to Table 3-9 for a description of the data stored in theDataCORDER for each correspondingPre-Trip test. 3.6.10 DataCORDER Communications Data retrieval from the DataCORDER can be accomplished by using one of the following; DataReader, DataLine/DataView or a communications interface module.
NOTE A DataReader, DataLine/DataView or a com- munications interface module display of Com- munication Failed is caused by faulty data transfer between the datacorder and the data retrival device. Common causes include:
1. Bad cable or connection between DataCORDER and data retrieval device.
2. PC communication port(s) unavailable or misassigned.
3. Chart Recorder Fuse (FCR) blown . a. DataReader The Carrier Transicold Data Reader (see Figure 3- 6) is a simple to operate hand held device designed to extract data from the DataCORDER and then upload it to a personal computer. The Data Reader has the ability to store multiple data files. Refer to Data Retrieval manual 62-10629 for a detailed explanation of the DataReader.
DataReader
Figure 3- 6 Data Reader b. DataLine The DataLINE software for a personal computer is supplied on both floppy disks and CD. This software allows interrogation, configuration variable assignment, screen view of the data, hard copy report generation, cold treatment probe calibration and filemanagement. Refer to Data Retrieval manual 62-10629 for a more detailed explanation of the DataLINE interrogation software. The
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DataLine manual may be found on the net at www.contaner.carrier.com c. Communications Interface Module The communications interface module is a slave module which allows communication with a master central monitoring station. The module will respond to communication and return information over the main power line. With a remotemonitoring unit installed, all functions and selectable features that are accessible at the unit may be performed at the master station. Retrieval of all DataCORDER reports may also be performed. Refer to the master system technical manual for further information. 3.6.11 USDA Cold Treatment Sustained cold temperature has been employed as an effective postharvest method for the control of Mediterranean and certain other tropical fruit flies. Exposing infested fruit to temperatures of 2.2 degrees Celsius (36_F) or below for specific periods results in the mortality of the various stages of this group of insects. In response to the demand to replace fumigation with this environmentally sound process, Carrier has integrated Cold Treatment capability into its microprocessor system. These units have the ability to maintain supply air temperature within one-quarter degree Celsius of setpoint and record minute changes in product temperature within the DataCORDER memory, thus meeting USDA criteria. Information on USDA is provided in the following subparagraphs a. USDA Recording A special type of recording is used for USDA cold treatment purposes. Cold treatment recording requires three remote temperature probes be placed at prescribed locations in the cargo. Provision is made to connect these probes to the DataCORDER via receptacles located at the rear left-hand side of the unit. Four or five receptacles are provided. The four three-pin receptacles are for the probes and fifth, five pin, receptacle is the rear connection for the the Interrogator. The probe receptacles are sized to accept plugs with tricam coupling locking devices. A label on the back panel of the unit shows which receptacle is used for each probe. The standard DataCORDER report displays the supply and return air temperatures. The cold treatment report displays USDA #1, #2, #3 and the supply and return air temperatures. Cold treatment recording is backed upby a battery so recording can continue if AC power is lost. b. USDA/ Message Trip Comment A special feature is incorporated which allows the user to enter a USDA (or other) message at the head of a data report. The maximum message length is 78 characters. Only onemessagewill be recorded per day. 3.6.12 USDA Cold Treatment Procedure The following is a summary of the steps required to initiate a USDA Cold Treatment. a. Calibrate the three USDA probes by ice bathing the probes and performing the calibration function with theDataReader or a personal computer. This calibra- tion procedure determines the probe offsets and stores them in the controller for use in generating the cold treatment report. Refer to the Data Retrieval manual 62-10629 for more details.
b. Pre-cool the container to the treatment temperature or below.
c. Install the DataCORDERmodule battery pack (if not already installed).
d. Place the three probes. The probes are placed into the pulp of the fruit (at the locations defined in the fol- lowing table) as the product is loaded.
Sensor 1 Place in pulp of the product located next to the return air intake.
Sensor 2
Place in pulp of the product five feet from the end of the load for 40 foot con- tainers, or three feet from the end of the load for 20 foot containers. This probe should be placed in a center carton at one-half the height of the load.
Sensor 3
Place in pulp of product five feet from the end of the load for 40 foot containers or three feet from the end of the load for 20 foot containers. This probe should be placed in a carton at a side wall at one- half the height of the load.
e. To initiate USDA Recording, connect the personal computer and perform the configuration as follows:
1. Fill in ISO header information 2. Add a trip comment if desired 3. Configure for five probes (s, r, P1, P2, P3) 4. Configure for one hour logging interval 5. Set the sensor configuration at USDA 6. Configure for two byte memory storage format 7. Do a trip start 3.6.13 DataCORDER Alarms Alarm display is an independent DataCORDER function. If an operating parameter is outside of the expected range or a component does not return the correct signals back to the DataCORDER an alarm is generated. TheDataCORDER contains a buffer of up to eight alarms. A listing of the DataCORDER alarms is provided in Table 3-10, page 3-26. Refer to paragraph 3.6.7 for configuration information. To display alarm codes: a. While in the Default Display mode, press the ALT. MODE&ALARMLIST keys. This accesses theData- CORDER Alarm List Display Mode, which displays any alarms stored in the Alarm Queue.
b. To scroll to the end of the alarm list press the UPAR- ROW. Depressing the DOWNARROWkey will scroll the list backward.
c. The left display will show AL# where # is the alarms number in the queue. The right display will show AA##, if the alarm is active, where ## is the alarm number. IA##, will show if the alarm is inactive
d. END is displayed to indicate the end of the alarm list if any alarms are active. CLEAr is displayed if all the alarms in the list are inactive.
e. If no alarms are active, the Alarm Queue may be cleared. The exception to this rule is the DataCORD- ER Alarm Queue Full alarm (AL91) , which does not have to be inactive in order to clear the alarm list. To Clear the Alarm List:
1. Press the ALT. MODE & ALARM LIST keys. 2. Press the UP/DOWN ARROW key until CLEAr is displayed.
3. Press the ENTER key. The alarm list will clear and -- -- -- -- -- will be displayed.
4. Press the ALARM LIST key. AL will show on the left display and -- -- -- -- -- on the right display when there are no alarms in the list.
5. Upon clearing of the AlarmQueue, the Alarm light will be turned off.
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Table 3-4 Controller Configuration Variables CONFIGURATION
NUMBER TITLE DEFAULT OPTION
CnF01 Bypass Valve Enable In Out CnF02 Evaporator Fan Speed dS (Dual) SS (Single) CnF03 Control Sensors FOUr duAL CnF04 Dehumidification Mode On OFF CnF05 Reserved for future use ---------- n/a CnF06 Condenser Fan Speed Select OFF (Single) On (Variable) CnF07 Unit Selection, 20FT/ 40FT/45FT 40ft 20ft,45 CnF08 Single Phase/Three Phase Motor 1Ph 3Ph CnF09 Refrigerant Selection r134a r12, r22, bLEnd CnF10 Two Speed Compressor Logic Out (Single) In (Dual) CnF11 Defrost Off Selection noOFF OFF CnF12 TXV/Solenoid Quench Valve Out (TXV) In (Solenoid) CnF13 Unloader Out In CnF14 Condenser Pressure Control (CPC) In Out CnF15 Discharge Temperature Sensor Out In CnF16 DataCORDER Present On (Yes) OFF (No) CnF17 Discharge Pressure Sensor Out (No) In (Yes) CnF18 Heater Old (Low Watt) nEW (High Watt) CnF19 Controlled Atmosphere Out (No) In (Yes) CnF20 Suction Pressure Sensor Out (No) In (Yes) CnF21 Autotransformer Out In CnF22 Economy Mode Option OFF Std, Full CnF23 Defrost Interval Timer Save Option noSAv SAv CnF24 Advanced Pre-Trip Enhanced Test Series Option Auto Auto2, Auto 3 CnF25 Pre-Trip Test Points/Results Recording Option rSLtS dAtA CnF26 Heat Lockout Change Option Set to --10_C Set to --5_C CnF27 Suction Temperature Display Option Out In CnF28 Bulb Mode Option NOr bULb CnF29 Arctic Mode Out In CnF30 Compressor Size 41 CFM 37 CFM CnF31 Probe Check Option Std SPEC CnF32 Single Evaporator Fan Option 2EF0 1EF0 CnF33 Snap Freeze Option OFF SnAP CnF34 Degree Celsius Lockout Option bOth _F CnF35 Humidification Mode OFF On CnF36 SMV Type 1 (standard) 2, 3 (stepper) CnF37 Electronic Temperature Recorder rEtUR SUPPL, bOth CnF38 Quench Bypass Valve Out In CnF39 Expanded Current Limit Range Out In CnF40 Demand Defrost Out In CnF41 Lower DTT Setting Out In CnF42 Auto Pre--trip Start Out In CnF47 Fresh Air Vent Position Sensor OFF UPP, LOW CnF48 CFS Override OFF On CnF49 Datacorder Configuration Restore OFF On CnF50 Enhanced Bulb Mode Selection OFF Bulb, dEHUM CnF51 Timed Defrost Disable 0 0--out, 1--in
Note: Configuration numbers not listedare not used in this application. These itemsmayappear when loading configuration software to the controller but changes will not be recognized by the controller programming.
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Table 3-5 Controller Function Codes (Sheet 1 of 4)
Code No. TITLE DESCRIPTION
Note: If the function is not applicable, the display will read -- -- -- -- -- Display Only Functions
Cd01 Suction Modulation Valve Opening (%)
Displays the SMV percent open. The right display reads 100% when the valve is fully open and 0% when the valve is fully closed. The valve will usually be at 21% on start up of the unit except in very high ambient temperatures.
Cd02 Quench Valve Displays state of the solenoid quench valve, open or closed. Cd03 Not Applicable Not used
Cd04
Cd05
Cd06
Line Current, Phase A
Line Current, Phase B
Line Current, Phase C
The current sensor measures current on two legs. The third unmeasured leg is calculated based on a current algorithm. The current measured is used for control and diagnostic purposes. For control processing, the highest of the Phase A and B current values is used for current limiting purposes. For diagnostic processing, the current draws are used to monitor component energization.. Whenever a heater or a motor is turned ON or OFF, the current draw increase/reduction for that activity is measured. The current draw is then tested to determine if it falls within the expected range of values for the component. Failure of this test will re- sult in a pre-trip failure or a control alarm indication.
Cd07 Main Power Voltage The main supply voltage is displayed.
Cd08 Main Power Fre- quency
The value of the main power frequency is displayed in Hertz. The frequency dis- played will be halved if either fuse F1 or F2 is bad (alarm code AL21).
Cd09 Ambient Tempera- ture The ambient sensor reading is displayed.
Cd10 Compressor Suction Temperature Compressor suction temperature sensor reading is displayed.
Cd11 Compressor Dis- charge Temperature Compressor discharge temperature sensor reading is displayed.
Cd12 Compressor Suction Pressure Compressor suction pressure transducer reading is displayed.
Cd13 Condenser Pressure Condenser pressure transducer reading is displayed.
Cd14 Compressor Dis- charge Pressure Compressor discharge pressure transducer reading is displayed.
Cd15 Unloader Valve (On-- Off) Not used in this application
Cd16 Compressor Motor Hour Meter
Records total hours of compressor run time. Total hours are recorded in incre- ments of 10 hours (i.e., 3000 hours is displayed as 300).
Cd17 Relative Humidity (%)
Humidity sensor reading is displayed. This code displays the relative humidity, as a percent value.
Cd18 Software Revision # The software revision number is displayed.
Cd19 Battery Check
This code checks the Controller/DataCORDER battery pack. While the test is run- ning, btest will flash on the right display, followed by the result. PASS will be displayed for battery voltages greater than 7.0 volts. FAIL will be displayed for battery voltages between 4.5 and 7.0 volts, and -- -- -- -- -- will be displayed for battery voltages less than 4.5 volts. After the result is displayed for four seconds, btest will again be displayed, and the user may continue to scroll through the various codes.
Cd20 Config/Model # This code indicates the dash number of the model for which the Controller is con- figured (i.e., if the unit is a 69NT40-489-100, the display will show 89100).
Cd21 Humidity Water Pump/Atomizer Status
This code displays the status of the humidity water pump (-- -- -- -- -- , forward, re- verse or off). If not configured, the mode is permanently deactivated and will dis- play -- -- -- -- -- .
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Table 3-5 Controller Function Codes (Sheet 2 of 4)
Cd22 Compressor Speed The status of the compressor is displayed (high, low or off). Cd23 Evaporator Fan Displays the current evaporator fan state (high, low or off).
Cd24 Controlled Atmosphere State Not used in this application
Cd25 Compressor Run Time Remaining Un- til Defrost
This code displays the time remaining until the unit goes into defrost (in tenths of an hour). This value is based on the actual accumulated compressor running time.
Cd26 Defrost Temperature Sensor Reading Defrost temperature sensor reading is displayed.
Configurable Functions NOTE
Function codes Cd27 through Cd37 are user-selectable functions. The operator can change the value of these functions to meet the operational needs of the container.
Cd27 Defrost Interval (Hours or Automatic)
There are two modes for defrost initiation, user--selected or automatic control. The user--selected values are (OFF), 3, 6, 9, 12, or 24 hours with a factory de- fault of 12 hours. Automatic defrost starts with an initial defrost at 3 hours and then adjusts the in- terval to the next defrost based on the accumulation of ice on the evaporator coil. Following a start--up or after termination of a defrost, the time will not begin count- ing down until the defrost temperature sensor (DTS) reading falls below set point. If the reading of DTS rises above set point any time during the timer count down, the interval is reset and the countdown begins over. If DTS fails, alarm code AL60 is activated and control switches over to the the return temperature sensor. The controller will act in the same manner as with the DTS except the return tempera- ture sensor reading will be used. Defrost Interval Timer Value (Configuration variable CnF23): If the software is configured to SAv (save) for this option, then the value of the defrost interval timer will be saved at power down and restored at power up. This option prevents short power interruptions from resetting an almost expired defrost interval, and possibly delaying a needed defrost cycle.
NOTE The defrost interval timer counts only during compressor run time.
Cd28 Temperature Units (_C or _F)
This code determines the temperature units (_C or _F) which will be used for all temperature displays. The user selects _C or _F by selecting function code Cd28 and pushing the ENTER key. The factory default value is Celsius units.
NOTE This function code will display --- --- --- --- --- ifConfiguration Variable CnF34 is set to _F.
Cd29 Failure Action (Mode)
If all of the control sensors are out of range (alarm code AL26) or there is a probe circuit calibration failure (alarm code AL27), the unit will enter the shutdown state defined by this setting. The user selects one of four possible actions as follows: A -- Full Cooling (stepper motor SMV at maximum allowed opening) B -- Partial Cooling (stepper motor SMV 11% open) C -- Evaporator Fan Only D -- Full System Shutdown -- Factory Default
Cd30 In-Range Tolerance
The in-range tolerance will determine the band of temperatures around the set point which will be designated as in-range. If the control temperature is in-range, the in-range light will be illuminated. There are four possible values: 1 = 0.5_C ( 0.9_F) 2 = 1.0_C ( 1.8_F) 3 = 1.5_C ( 2.7_F) 4 = 2.0_C ( 3.6_F) -- Factory Default
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Table 3-5 Controller Function Codes (Sheet 3 of 4)
Cd31 Stagger Start Offset Time (Seconds)
The stagger start offset time is the amount of time that the unit will delay at start- up, thus allowing multiple units to stagger their control initiation when all units are powered up together. The eight possible offset values are: 0 (Factory Default), 3, 6, 9, 12, 15, 18 or 21 seconds
Cd32 Current Limit (Amperes)
The current limit is the maximum current draw allowed on any phase at any time. Limiting the units current reduces the load on the main power supply. This is ac- complished by reducing the SMV position until current draw is reduced to the set point. When desirable, the limit can be lowered. Note, however, that capacity is also reduced. The five values for 460vac operation are: 15, 17, 19, 21 (Factory Default), 23
Cd33 Perishable Mode Dehumidification/Hu- midification Control (% RH)
Relative humidity set point is available only on units configured for dehumidifica- tion. When the mode is activated, the control probe LED flashes on and off every second to alert the user. If not configured, the mode is permanently deactivated and -- -- -- -- -- will display. The value can be set to OFF. TEST, or a range of 65 to 95% relative humidity in increments of 1%. [If bulb mode is active (code Cd35) and Lo speed evaporator motors are selected (code Cd36) then set point ranges from 60 to 95%.] When TEST is selected or test set point is entered, the heat LED should illuminate, indicating that dehumidification mode is activated. After a period of five minutes in the TEST mode has elapsed, the previously selected mode is reinstated.
NOTE If humidification (CnF35) is enabled, then humidification will be enabled and dehumidification locked out at set points of 75%and above. At set points be- low 75%, dehumidification will be enabled and dehumidification locked out.
Cd34 Economy Mode (On--Off)
Economy mode is a user selectable mode of operation provided for power saving purposes.
Cd35 Bulb Mode
Bulb mode is a user selectable mode of operation that is an extension of dehu- midification control (Cd33). If dehumidification is set to Off, code Cd35 will dis- play Nor and the user will be unable to change it. After a dehumidification set point has been selected and entered for code Cd33, the user may then change code Cd35 to bulb. After bulb has been selected and entered, the user may then utilize function codes Cd36 and Cd37 to make the desired changes.
Cd36 Evaporator Speed Select
This code is enabled only if in the dehumidification mode (code Cd33) and bulb mode (Cd35) has been set to bulb. If these conditions are not met, alt will be displayed (indicating that the evaporator fans will alternate their speed) and the display cannot be changed. If a dehumidification set point has been selected along with bulb mode then alt may be selected for alternating speed, Lo for low speed evaporator fan only, or Hi for high speed evaporator fan only. If a setting other than alt has been selected and bulb mode is deactivated in any manner, then selection reverts back to alt.
Cd37 Defrost Termination Temperature Setting (Bulb Mode)
This code, as with function code Cd36, is used in conjunction with bulb mode and dehumidification. If bulb mode is active, this code allows the user to change the defrost termination thermostat settings. If bulb mode is deactivated, the DTS set- ting returns to the default.
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Table 3-5 Controller Function Codes (Sheet 4 of 4)
Display Only Functions - Continued
Cd38 Secondary Supply Temperature Sensor
Code Cd38 will display the current secondary supply temperature sensor reading for units configured for four probes. If the unit is configured with a DataCORDER, Cd38 will display -- -- -- -- -- . If the DataCORDER suffers a failure, (AL55) Cd38 will display the supply recorder sensor reading.
Cd39 Secondary Return Temperature Sensor
Code Cd39 will display the current secondary return temperature sensor reading for units configured for four probes. If the unit is configured with a DataCORDER, Cd39 will display -- -- -- -- -- . If the DataCORDER suffers a failure, (AL55) Cd39 will display the return recorder sensor reading.
Cd40 Container Identifica- tion Number
Code Cd40 is configured at commissioning to read a valid container identification number. The reading will not display alpha characters, only the numeric portion of the number will display.
Cd41 Cd42 Not Applicable Scroll Units Only
The following Configuration Codes (Cd43--45) highlighted in gray apply to Software Revisions 5123 and 5124 ONLY.
Cd43 Air Slide Mode
This code is only applicable to units with Auto Fresh. If not configured, the mode is permanently deactivated and CD 43 will display -- -- -- -- --. When mode is available, it can be set to OFF, AUTO, USER, or TEST. After AUTO or USER mode has been selected and entered, the user may use function code 45 and 46 to make desired changes.
Cd44 Air Slide Opening This code is only applicable to units with Auto Fresh. If not configured, the per- cent opening is permanently deactivated and Cd44 will display -- -- -- -- -- . When percent opening is available, it can be set to 0% to 100%.
Cd45 Air Slide Timer This code is enabled only if Air Slide Mode is AUTO or USER. If not, Cd45 will display -- -- -- -- --.
In software revision 5125, Codes Cd43--Cd45 were consolidated into Code Cd43, and Codes Cd44--Cd45 were reassigned.
Cd43 AutoFresh Mode
Code Cd43 is a user selectable mode of operation that allows the opening and closing of a mechanical air vent door via a stepper motor. These selection modes are as follows: OFF -- Air makeup vent will remain closed. User -- Allows for manual selection of the setting. Delay --The opening of the door is based on selected time, return temperature
and flow rate (percent opened). gASLM -- The opening is based percent open and CO2 and O2 selectable limits
(LM). This selection is only active if the unit has a CO2 sensor. TEST / CAL (CO2 sensor option units only) -- The door will fully open and close
to allow the user to inspect its operation. If CAL is selected the controller will zero calibrate the CO2 sensor input.
If the unit is not configured with AutoFresh the CD43 will display --------.
Cd44 AutoFresh Values Code Cd44 will display CO2 and O2 concentrations and limits. If the unit is not configured for AutoFresh or a CO2 sensor is not installed , CD44 will dis- play-------- .
Cd45 Vent Position Sensor (VPS)
Code Cd45 will display whenever the control detects movement via the sensor unless alarm 50 is active. The code will display for 30 seconds, then time out and return to the normal display mode. If the Temperature unit is _F, the VPS units will be CFM and in _C the VPS units shall be CMH.
Cd46 Not Used --
Cd47 Variable Economy Temperature Setting
The variable temperature _C or _F setting is used with economy mode. Func- tion code is -------- when unit is not configured for economy mode.
Cd48 Dehumidification/ Bulb Mode Parameter Selection
Code CD48 is used to determine limits (between 60%--95%) for dehumidification and/or bulb mode (CNF28) when active.
Cd49 Days Since Last Successful Pre--Trip
Code CD49 will display the number of days since the last successful Auto1, Auto2 or Auto3 pre--trip sequence.
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Figure 3- 1Table 3-6 Controller Alarm Indications (Sheet 1 of 3)
Code No. TITLE DESCRIPTION
AL11 Evaporator Motor 1 IP Trip
Alarm 11 is applicable to units with Single Evaporator Fan Capability (CnF32 set to 1EFO) only. The alarm is triggered if the evaporator fan motor #1 internal pro- tector opens. If the alarm is active, probe check is deactivated.
AL12 Evaporator Motor 2 IP Trip
Alarm 12 is applicable to units with Single Evaporator Fan Capability (CnF32 set to 1EFO) only. The alarm is triggered if the evaporator fan motor #2 internal pro- tector opens. If the alarm is active, probe check is deactivated.
AL20 Control Circuit Fuse Open (24 vac)
Alarm 20 is triggered by control power fuse (F3) opening and will cause the soft- ware shutdown of all control units. This alarm will remain active until the fuse is replaced.
AL21 Micro Circuit Fuse Open (18 vac)
Alarm 21 is triggered by one of the fuses (F1/F2) being opened on 18 volts AC power supply to the Controller. The suction modulation valve (SMV) will be opened and current limiting is halted. Temperature control will be maintained by cycling the compressor.
AL22 Evaporator Fan Mo- tor Safety
Alarm 22 responds to the evaporator motor internal protectors. On units with Nor- mal Evaporator Fan Operation (CnF32 set to 2EFO) the alarm is triggered by opening of either internal protector. It will disable all control units until the motor protector resets. On units with Single Evaporator Fan Capability (CnF32 set to 1EFO) the alarm is triggered by opening of both internal protectors. It will disable all control units until a motor protector resets.
AL23 KA2--KB10 Jumper Disconnected
Alarm 23 is triggered by a missing jumper wire. The alarm will stay active until the jumper wire is reconnected. On units with Single Evaporator Fan Capability (CnF32 set to 1EFO) this alarm is deactivated.
AL24 Compressor Motor Safety
Alarm 24 is triggered by the opening of the compressor motor internal protector. This alarm will disable all control units except for the evaporator fans and will re- main active until the motor protector resets. This alarm triggers the failure action code set by Function Code Cd29.
AL25 Condenser Fan Mo- tor Safety
Alarm 25 is triggered by the opening of the condenser motor internal protector and will disable all control units except for the evaporator fans. This alarm will remain active until the motor protector resets. This alarm is deactivated if the unit is operating on water cooled condensing.
AL26 All Supply and Re- turn temperature Control Sensors Failure
Alarm 26 is triggered if the Controller determines that all of the control sensors are out-of-range. This can occur for box temperatures outside the range of --50_C to +70_C (--58_F to +158_F). This alarm triggers the failure action code set by Function Code Cd29.
AL27 Probe Circuit Cal- ibration Failure
The Controller has a built-in Analog to Digital (A-D) converter, used to convert analog readings (i.e. temperature sensors, current sensors, etc.) to digital read- ings. The Controller continuously performs calibration tests on the A-D converter. If the A-D converter fails to calibrate for 30 consecutive seconds, this alarm is activated.This alarm will be inactivated as soon as the A-D converter calibrates.
AL50 Fresh Air Position Sensor (VPS)
Alarm 50 is activated whenever the sensor is outside the valid range. There is a 5 minute adjustment period where the user can change the vent position without generating an alarm event. The sensor requires 5 minutes of no movement to confirm stability. If the vent position changes at any point beyond the 5 minute adjustment period, the sensor will generate an alarm event. The alarm is trig- gered off when the unit power cycles and the sensor is within valid range.
AL51 Alarm List Failure
During start-up diagnostics, the EEPROM is examined to determine validity of its contents. This is done by testing the set point and the alarm list. If the contents are invalid, Alarm 51 is activated. During control processing, any operation in- volving alarm list activity that results in an error will cause Alarm 51 to be acti- vated. Alarm 51 is a display only alarm and is not written into the alarm list. Pressing the ENTER key when CLEAr is displayed will result in an attempt to clear the alarm list. If that action is successful (all alarms are inactive), Alarm 51 will be reset.
AL52 Alarm List Full Alarm 52 is activated whenever the alarm list is determined to be full; at start-up or after recording an alarm in the list. Alarm 52 is displayed, but is not recorded in the alarm list. This alarm can be reset by clearing the alarm list. This can be done only if all alarms written in the list are inactive.
3-18T-285
Table 3-6 Controller Alarm Indications (Sheet 2 of 3)
AL53 Battery Pack Failure Alarm 53 is caused by the battery pack charge being too low to provide sufficient power for battery-backed recording. Renew replaceable batteries. If this alarm occurs on start up, allow a unit fitted with rechargeable batteries to operate for up to 24 hours to charge rechargeable batteries sufficiently to deactivate the alarm
AL54 Primary Supply Tem- perature Sensor Failure (STS)
Alarm 54 is activated by an invalid primary supply temperature sensor reading that is sensed outside the range of --50 to +70_C (--58_F to +158_F) or if the probe check logic has determined there is a fault with this sensor. If Alarm 54 is activated and the primary supply is the control sensor, the secondary supply sen- sor will be used for control if the unit is so equipped. If the unit does not have a secondary supply temperature sensor, and AL54 is activated, the primary return sensor reading, minus 2_C will be used for control.
NOTE
The P5 Pre-Trip test must be run to inactivate the alarm
AL55 DataCORDER Failure
This alarm activates to indicate the DataCORDER has a software failure. To clear this alarm, reconfigure the unit to the current model number. This failure may be the result of a voltage dip in excess of 25%.
AL56 Primary Return Tem- perature Sensor Failure (RTS)
Alarm 56 is activated by an invalid primary return temperature sensor reading that is outside the range of --50 to +70_C (--58_F to +158_F). If Alarm 56 is acti- vated and the primary return is the control sensor, the secondary return sensor will be used for control if the unit is so equipped. If the unit is not equipped with a secondary return temperature sensor or it fails, the primary supply sensor will be used for control.
NOTE The P5 Pre-Trip test must be run to inactivate the alarm.
AL57 Ambient Tempera- ture Sensor Failure
Alarm 57 is triggered by an ambient temperature reading outside the valid range from --50_C (--58_F) to +70_C (+158_F).
AL58 Compressor High Pressure Safety
Alarm 58 is triggered when the compressor high discharge pressure safety switch remains open for at least one minute. This alarm will remain active until the pres- sure switch resets, at which time the compressor will restart.
AL59 Heat Termination Thermostat
Alarm 59 is triggered by the opening of the heat termination thermostat and will result in the disabling of the heater. This alarm will remain active until the thermo- stat resets.
AL60 Defrost Temperature Sensor Failure
Alarm 60 is an indication of a probable failure of the defrost temperature sensor (DTS). It is triggered by the opening of the heat termination thermostat (HTT) or the failure of the DTS to go above set point within two hours of defrost initiation. After one-half hour with a frozen range set point, or one-half hour of continuous compressor run time, if the return air falls below 7_C (45_F), the Controller checks to ensure the DTS reading has dropped to 10_C or below. If not, a DTS failure alarm is given and the defrost mode is operated using the return tempera- ture sensor. The defrost mode will be terminated after one hour by the Controller.
AL61 Heaters Failure Alarm 61 is triggered by detection of improper amperage resulting from heater activation or deactivation. Each phase of the power source is checked for proper amperage.This alarm is a display alarm with no resulting failure action, and will be reset by a proper amp draw of the heater.
AL62 Compressor Circuit Failure
Alarm 62 is triggered by improper current draw increase (or decrease) resulting from compressor turn on (or off). The compressor is expected to draw a mini- mum of 2 amps; failure to do so will activate the alarm.This is a display alarm with no associated failure action and will be reset by a proper amp draw of the compressor.
AL63 Current Over Limit
Alarm 63 is triggered by the current limiting system. If the compressor is ON and current limiting procedures cannot maintain a current level below the user se- lected limit, the current limit alarm is activated.This alarm is a display alarm and is inactivated by power cycling the unit, changing the current limit via the code select Cd32, or if the suction modulation valve (SMV) is open beyond the control- ler desired point.
3-19 T-285
Table 3-6 Controller Alarm Indications (Sheet 3 of 3)
AL64 Discharge Tempera- ture Over Limit
Alarm 64 is triggered if the discharge temperature sensed is greater than 135_C (275_F) for three continuous minutes, if it exceeds 149_C (300_F), or if the sen- sor is out of range. This is a display alarm and has no associated failure action.
AL65 Discharge Pressure Transducer Failure
Alarm 65 is triggered by a compressor discharge transducer reading outside the valid range of 73.20 cm Hg (30 in Hg) to 32.34 Kg/cm2 (460 psig). This is a dis- play alarm and has no associated failure action.
AL66 Suction Pressure Transducer Failure
Alarm 66 is triggered by a suction pressure transducer reading outside the valid range of 73.20 cm Hg (30 in Hg) to 32.34 Kg/cm2 (460 psig). This is a display alarm and has no associated failure action.
AL67 Humidity Sensor Failure
Alarm 67 is triggered by a humidity sensor reading outside the valid range of 0% to 100% relative humidity. If alarm AL67 is triggered when the dehumidification mode is activated, then the dehumidification mode will be deactivated.
AL68 Condenser Pressure Transducer Failure
Alarm 68 is triggered by a condenser pressure transducer reading outside the valid range of 73.20 cm Hg (30 in Hg) to 32.34 Kg/cm2 (460 psig). This is a dis- play alarm and has no associated failure action.
AL69 Suction Temperature Sensor Failure
Alarm 69 is triggered by a suction temperature sensor reading outside the valid range of --60_C (--76_F) to 150_C (302_F). This is a display alarm and has no associated failure action.
NOTE If the Controller is configured for four probes without a DataCORDER, the DataCORDERalarms AL70 and AL71 will be processed as Controller alarms AL70 and AL71.
The Controller performs self-check routines. if an internal failure occurs, an ERR alarm will appear on the display. This is an indication the Controller needs to be replaced. ERROR DESCRIPTION
ERR 0 -- RAM failure Indicates that the Controller working memory has failed.
ERR Internal Microprocessor
ERR 1 -- Program Memory failure Indicates a problem with the Controller program.
# Failure ERR 2 -- Watchdog time--out
The Controller program has entered a mode where- by the Controller program has stopped executing.
ERR 3 -- On board timer failure
The on board timers are no longer operational. Timed items such as; defrost, etc. may not work.
ERR 4 -- Internal counter failure
Internal multi-purpose counters have failed. These counters are used for timers and other items.
ERR 5 -- A-D failure The Controllers Analog to Digital (A-D) converter has failed.
Entr StPt
Enter Setpoint (Press Arrow & Enter)
The Controller is prompting the operator to enter a set point.
LO
Low Main Voltage (Function Codes Cd27--38 disabled and NO alarm stored.)
This message will be alternately displayed with the set point whenever the supply voltage is less than 75% of its proper value.
3-20T-285
Table 3-7 Controller Pre-Trip Test Codes (Sheet 1 of 4)
Code No. TITLE DESCRIPTION
NOTE Auto or Auto1 menu includes the: P, P1, P2, P3, P4, P5, P6 and rSLts. Auto2 menu in- cludes P, P1, P2, P3, P4, P5, P6, P7, P8, P9, P10 and rSLts.Auto3 menu includes P, P1, P2, P3, P4, P5, P6, P7, P8 and rSLts
P Pre-Trip Initiated All lights and display segments will be energized for five seconds at the start of the pre-trip. Since the unit cannot recognize lights and display failures, there are no test codes or results associated with this phase of pre-trip.
P1-0 Heaters Turned On Setup: Heater must start in the OFF condition, and then be turned on. A current draw test is done after 15 seconds. Pass/Fail Criteria: Passes if current draw change is within the range specified.
P1-1 Heaters Turned Off Setup: Heater must start in the ON condition, and then be turned off. A current draw test is done after 10 seconds. Pass/Fail Criteria: Passes if current draw change is within the range specified.
P2-0 Condenser Fan On Requirements: Water pressure switch (WP) input must be closed. Setup: Condenser fan is turned ON, a current draw test is done after 15 sec- onds. Pass/Fail Criteria: Passes if current draw change is within the range specified.
P2-1 Condenser Fan Off Setup: Condenser fan is turned OFF, a current draw test is done after 10 sec- onds. Pass/Fail Criteria: Passes if current draw change is within the range specified.
P3 Low Speed Evapo- rator Fans
Requirements: The unit must be equipped with a low speed evaporator fan, as determined by the Evaporator Fan speed select configuration variable.
NOTE If the unit is configured for single evaporator fan operation, Pre-Trip tests P3-0, P3-1, P4-0 and P4-1 will fail immediately if Controller alarm codes AL11 or AL12 are active at the start of testing.
P3-0 Low Speed Evapo- rator Fan Motors On
Setup: The high speed evaporator fans will be turned on for 10 seconds, then off for two seconds, then the low speed evaporator fans are turned on. A current draw test is done after 60 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range speci- fied. Fails if AL11 or AL12 activates during test.
P3-1 Low Speed Evapo- rator Fan Motors Off
Setup: The low speed Evaporator Fan is turned off, a current draw test is done after 10 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range speci- fied. Fails if AL11 or AL12 activates during test.
P4-0 High Speed Evapo- rator Fan Motors On
Setup: The high speed Evaporator Fan is turned on, a current draw test is done after 60 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range speci- fied. Fails if AL11 or AL12 activates during test.
P4-1 High Speed Evapo- rator Fan Motors Off
Setup: The high speed Evaporator Fan is turned off, a current draw test is done after 10 seconds. Pass/Fail Criteria: Passes if change in current draw is within the range speci- fied. Fails if AL11 or AL12 activates during test.
P5-0 Supply/Return Probe Test
Setup: The High Speed Evaporator Fan is turned on and run for eight minutes, with all other outputs de-energized. Pass/Fail Criteria: A temperature comparison is made between the return and supply probes.
NOTE If this test fails, P5-0 and FAIL will be displayed. If both Probe tests (this test and the PRIMARY/ SECONDARY) pass, the display will read P5 PASS.
3-21 T-285
Table 3-7 Controller Pre-Trip Test Codes (Sheet 2 of 4)
P5-1 Supply Probe Test
Requirements: For units equipped with secondary supply probe only. Pass/Fail Criteria: The temperature difference between primary and secondary probe (supply) is compared.
NOTE If this test fails, P5-1 and FAIL will be displayed. If both Probe tests (this and the SUPPLY/ RETURN TEST) pass, because of themultiple tests, the display will read P 5 PASS.
P5-2 Return Probe Test
Requirements: For units equipped with secondary return probe only. Pass/Fail Criteria: The temperature difference between primary and secondary probe (return) is compared.
NOTES
1. If this test fails, P5-2 and FAIL will be displayed. If both Probe tests (this test and the SUPPLY/ RETURN) pass, because of the multiple tests, the display will read P 5, PASS.
2. The results of Pre-Trip tests 5-0, 5-1 and 5-2 will be used to activate or clear control probe alarms.
P-6 Not Applicable
P6-0 Compressor On
Setup: A current draw test is performed before the compressor is started. The compressor is started. SMV is opened and another current draw test is per- formed. Pass/Fail Criteria: Passes if the change in compressor current draw is within the specified range.
P6--H & P6L Not Applicable
P6-2 Suction Modulation Valve (Open and
Closed)
Setup: The compressor and fans continue to run from the previous test. The quench valve (if configured) will operate as in normal control mode. The SMV is closed to 0% open, current and condenser pressure readings are taken. The SMV is opened to 50% with continuous current and condenser pressure read- ings taken to establish maximum values. The SMV is returned to 0% open and final readings are taken. Pass/Fail Criteria: Passes if the calculated difference in current at the 50% open position are above a specified value before and after opening of the SMV, OR the calculated difference in condenser pressure at the 50% open position are above a specified value before and after opening of the SMV
P6-3 Quench Valve Test Setup: The compressor suction temperature is measured with the Quench valve closed. The Quench valve is energized and the suction temperature drop is checked. Pass/Fail Criteria: Passes if suction temperature is within the valid range.
P6-4 Not Applicable Not Used P6-5 Not Applicable Not Used
NOTE P7-0 & P8 are included with the Auto2 & Auto 3 only. P9-0 through P10 are included with Auto2 only
P7--0 High Pressure Switch Closed
Setup: When the unit is running, the condenser fan is de-energized, and a 15 minute timer is started. The right display shows discharge pressure if the unit is equipped with a discharge pressure transducer (DPT). If no DPT is installed, the condenser pressure transducer (CPT) reading will be displayed. Pass/Fail Criteria: The test fails if high pressure switch fails to open in 15 min- utes.
3-22T-285
Table 3-7 Temperature Controller Pre-Trip Test Codes (Sheet 3 of 4)
Note, this test is skipped if the unit does NOT have: A compressor discharge sensor (CPDS).
A discharge pressure transducer (DPT).
Condenser pressure transducer (CPT). In addition, this test is skipped if:
The sensed ambient temperature is less than 7_C (45_F).
The return air temperature is less than --17.8_C (0_F).
Thewater pressure switch (WP) is open, indicating that theunit is operating with a water-cooled condenser.
P7-0 High Pressure Switch Closed (Continued)
Pass/Fail Criteria: Under conditions of the above NOTE; the test immediately fails if the following inputs are sensed to be invalid:
Compressor discharge sensor (CPDS).
Discharge pressure transducer (DPT).
Condenser pressure transducer (CPT).
OR, if any one of the following inputs are sensed to be invalid: Return temperature sensor (RTS).
Ambient sensor (AMBS). In addition, the test will fail if:
The high pressure switch (HPS) fails to open within 15 minutes.
The discharge temperature exceeds 138_C (280_F).
The discharge temperature is less than or equal to ambient temperature plus 5_C (9_F).
The condenser pressure transducer (CPT) or dischargepressure transduc- er (DPT) pressure exceeds 27.42 kg/cm2 (390 psig).
P7-1 High Pressure Switch Open
Requirements: Test P7-0 must pass for this test to execute. Setup: The con- denser fan is started and a 60 second timer is started. Pass/Fail Criteria: Passes the test if the high pressure switch (HPS) closes within the 60 second time limit, otherwise, it fails.
P8-0 Perishable Mode Heat Test
Setup: If the container temperature is below 15.6C (60_F), the set point is changed to 15.6C, and a 60 minute timer is started. The left display will read P8-0. The control will then heat the container until 15.6C is reached. If the container temperature is above 15.6C at the start of the test, then the test pro- ceeds immediately to test P8-1 and the left display will change to P8-1. Pass/Fail Criteria: The test fails if the 180 minute timer expires before the con- trol temperature reaches set point. The display will read P8-0, FAIL.
P8-1 Perishable Mode Pull Down Test
Requirements: Control temperature must be at least 15.6C (60_F). Setup: The set point is changed to 0C (32_F), and a 180 minute timer is started. The left display will read P8-1, the right display will show the supply air temperature. The unit will then start to pull down the temperature to the 0C set point. Pass/Fail Criteria: The test passes if the container temperature reaches set point before the 180 minute timer expires.
3-23 T-285
Table 3-7 Controller Pre-Trip Test Codes (Sheet 4 of 4)
P8-2 Perishable Mode Maintain Tempera-
ture Test
Requirements: Test P8-1 must pass for this test to execute. Setup: The left display will read P8-2, and the right display will show the supply air temperature. A 60 minute timer is started. The unit will be required to main- tain the 0C temperature to within + or -- 0.5_C (0.9_F) of set point until a Data- CORDER recording is executed. The recorder supply probe temperature running total (and its associated readings counter) will be zeroed out for the remainder of the recording period at the start of this test, so that the actual value recorded in the DataCORDER will be an average of only this tests results. Once a recording interval is complete, the average recorder supply temperature will be recorded in the DataCORDER, as well as stored in memory for use in applying the test pass/ fail criteria. Pass/Fail Criteria: If the recorded temperature is within +/-- 0.5_C. of set point from test start to DataCORDER recording, the test passes. If the average tem- perature is outside of the tolerance range at the recording, the test fails.
P9-0 Defrost Test
Setup: The defrost temperature sensor (DTS) reading will be displayed on the left display. The right display will show the supply air temperature. The unit will run FULL COOL for 30 minutes maximum until the DTT is considered closed. Once the DTT is considered closed, the unit simulates defrost by running the heaters for up to two hours, or until the DTT is considered open. Pass/Fail Criteria: The test fails if: the DTT is not considered closed after the 30 minutes of full cooling, HTT opens when DTT is considered closed or if return air temperature rises above 248_C (120_F).
P10-0 Frozen Mode Setup Test
Setup: After completion of the defrost test, the testing proceeds directly to test P10--1 if the container temperature is above 7_C (45_F). If the container temper- ature is below 7_C, a 180 minute timer will be started, the set point will be set to 7_C and the control will be placed in normal heat. The left display will read P10--0 and the unit will continue in operation until the temperature is raised to set point. Pass/Fail Criteria: If the temperature does not reach set point(less --0.3_C or 6.7 F) before the timer times out display will read P100, FAIL. The test will not auto--repeat.
P10-1 Frozen Mode (Pull Down) Test
Setup: When the container temperature is greater than or equal to the 7.2C (45_F) set point which was set in the frozen mode heat test, the left display will read P10--1 and the right display will show the return air temperature. The set point will then be changed to --17.7_C (0_F). The unit will then have a maximum of three hours to pull the container temperature down to the --17.7C set point. Pass/Fail Criteria: If this occurs within the three hour time limit, the test passes. If pulldown is not completed within the three hour time, the test fails.
P10-2 Frozen Mode Main- tain Temperature
Test
Setup: After the unit has successfully completed frozen pulldown test, the left display will read P10--2 and the right display will show return air temperature. The unit will then be required to maintain --17.7C (0_F) temperature within +/-- 0.5_C (0.9_F) of set point until a DataCORDER recording is executed. The recorder return probe temperature running total (and its associated counter) will be zeroed for the remainder of the recording period at the start of this test, so that the actual recorded value will be an average of only this tests results. Once the recording interval is complete, the average return temperature will be recorded in the DataCORDER, and stored in memory for use in applying the test pass/fail criteria. Pass/Fail Criteria: If the recorded temperature is within +/-- 0.5_C of set point from test start to DataCORDER recording, the test passes. If temperature is out- side of the tolerance range at the DataCORDER recording, the test fails.
3-24T-285
Table 3-8 DataCORDER Function Code Assignments
NOTE Inapplicable Functions Display -- -- -- -- --
To Access: Press ALT. MODE key Code No. TITLE DESCRIPTION
dC1 Recorder Supply Temperature Current reading of the supply recorder sensor.
dC2 Recorder Return Temperature Current reading of the return recorder sensor.
dC3-5 USDA 1,2,3 Temper- atures Current readings of the three USDA probes.
dC6-13 Network Data Points 1-8
Current values of the network data points (as configured). Data point 1 (Code 6) is generally the humidity sensor and its value is obtained from the Control- ler once every minute.
dC14 Cargo Probe 4 Tem- perature Current reading of the cargo probe #4.
dC15-19 Future Expansion These codes are for future expansion, and are not in use at this time.
dC20-24 Temperature Sen- sors 1-5 Calibration
Current calibration offset values for each of the five probes: supply, return, USDA #1, #2, and #3. These values are entered via the interrogation pro- gram.
dC25 Future Expansion This code is for future expansion, and is not in use at this time..
dC26,27 S/N, Left 4, Right 4 The DataCORDER serial number consists of eight characters. Function code dC26 contains the first four characters. Function code dC27 contains the last four characters. (This serial number is the same as the Controller serial num- ber)
dC28 Minimum Days Left An approximation of the number of logging days remaining until the Data- CORDER starts to overwrite the existing data.
dC29 Days Stored Number of days of data that are currently stored in the DataCORDER.
dC30 Date of last Trip start The date when a Trip Start was initiated by the user. In addition, if the system goes without power for seven continuous days or longer, a trip start will auto- matically be generated on the next AC power up.
dC31 Battery Test Shows the current status of the optional battery pack. PASS: Battery pack is fully charged. FAIL: Battery pack voltage is low.
dC32 Time: Hour, Minute Current time on the real time clock (RTC) in the DataCORDER. dC33 Date: Month, Day Current date (month and day) on the RTC in the DataCORDER. dC34 Date: Year Current year on the RTC in the DataCORDER.
dC35 Cargo Probe 4 Calibration
Current calibration value for the Cargo Probe. This value is an input via the interrogation program.
3-25 T-285
Table 3-9 DataCORDER Pre-Trip Result Records Test No. TITLE DATA
1-0 Heater On Pass/Fail/Skip Result, Change in current for Phase A, B and C 1-1 Heater Off Pass/Fail/Skip Result, Change in currents for Phase A, B and C
2-0 Condenser Fan On Pass/Fail/Skip Result, Water pressure switch (WPS) -- Open/Closed, Change in currents for Phase A, B and C
2-1 Condenser Fan Off Pass/Fail/Skip Result, Change in currents for Phase A, B and C
3-0 Low Speed Evaporator Fan On Pass/Fail/Skip Result, Change in currents for Phase A, B and C
3-1 Low Speed Evaporator Fan Off Pass/Fail/Skip Result, Change in currents for Phase A, B and C
4-0 High Speed Evaporator Fan On Pass/Fail/Skip Result, Change in currents for Phase A, B and C
4-1 High Speed Evaporator Fan Off Pass/Fail/Skip Result, Change in currents for Phase A, B and C
5-0 Supply/Return Probe Test Pass/Fail/Skip Result, STS, RTS, SRS and RRS 5-1 Secondary Supply Probe Test Pass/Fail/Skip Result 5-2 Secondary Return Probe Test Pass/Fail/Skip Result 6-0 Compressor On Pass/Fail/Skip Result, Change in currents for Phase A, B and C 6-1 Not Applicable Not Used
6-2 Suction Modulation Valve Open and Closed Pass/Fail/Skip Result, Is current or pressure limit in effect (Y,N)
6-4 Not Applicable Not Used 6-5 Not Applicable Not Used
7-0 High Pressure Switch Closed Pass/Fail/Skip Result, AMBS, DPT or CPT (if equipped) Input values that component opens
7-1 High Pressure Switch Open Pass/Fail/Skip Result, STS, DPT or CPT (if equipped) Input values that component closes
8-0 Perishable Heat Pass/Fail/Skip Result, STS, time it takes to heat to 16_C (60_F) 8-1 Perishable Pull Down Pass/Fail/Skip Result, STS, time it takes to pull down to 0_C (32_F)
8-2 Perishable Maintain Pass/Fail/Skip Result, Averaged DataCORDER supply temperature (SRS) over last recording interval.
9-0 Defrost Test Pass/Fail/Skip Result, DTS reading at end of test, line voltage, line frequency, time in defrost.
10-0 Frozen Mode Set-up Pass/Fail/Skip Result, STS, time unit is in heat. 10-1 Frozen Mode Pull Down Pass/Fail/Skip Result, STS, time to pull down unit to --17.8_C (0_F).
10-2 Frozen Mode Maintain Pass/Fail/Skip Result, Averaged DataCORDER return temperature (RRS) over last recording interval.
3-26T-285
Table 3-10 DataCORDER Alarm Indications
To Access: Press ALT. MODE key Code No. TITLE DESCRIPTION
dAL70 Recorder Supply Tem- perature Out of Range
The supply recorder sensor reading is outside of the range of --50_C to 70_C (--58_F to +158_F) or, the probe check logic has determined there is a fault with this sensor.
NOTE The P5 Pre-Trip test must be run to inactivate the alarm.
dAL71 Recorder Return Tem- perature Out of Range
The return recorder sensor reading is outside of the range of --50_C to 70_C (--58_F to +158_F) or, the probe check logic has determined there is a fault with this sensor.
NOTE The P5 Pre-Trip test must be run to inactivate the alarm.
dAL72-74 USDA Temperatures 1, 2, 3 Out of Range
The USDA probe temperature r ading is sensed outside of --50 to 70C (--58 to 158F) range.
dAL75 Cargo Probe 4 Out of Range
The cargo probe temperature reading is outside of --50 to 70C (--58 to 158F) range.
dAL76, 77 Future Expansion These alarms are for future exp
dAL78-85 Network Data Point 1 -- 8 Out of Range
The network data point is outsid ER is configured by default to r sors. The DataCORDER may b network data points. An alarm n configured point. When an alarm rogated to identify the data poin installed, it is usually assigned t
dAL86 RTC Battery Low The Real Time Clock (RTC) bac tain the RTC reading.
dAL87 RTC Failure An invalid date or time has bee by changing the Real Time Cloc
dAL88 DataCORDER EEPROM Failure A write of critical DataCORDER
dAL89 Flash Memory Error An error has been detected in t volatile FLASH memory.
dAL90 Future Expansion This alarm is for future expansi dAL91 Alarm List Full The DataCORDER alarm queu
e
ansion, and are not in use at this time. e of its specified range. The DataCORD- ecord the supply and return recorder sen- e configured to record up to 8 additional umber (AL78 to AL85) is assigned to each occurs, the DataCORDER must be inter-
t assigned. When a humidity sensor is o AL78. kup battery is too low to adequately main-
n detected. This situation may be corrected k (RTC) to a valid value using DataLINE.
information to the EEPROM has failed.
he process of writing daily data to the non-
on, and is not in use at this time. e is determined to be full (eight alarms).
T-2854-1
SECTION 4 OPERATION
4.1 INSPECTION (Before Starting)
WARNING Beware of unannounced starting of the evaporator and condenser fans. The unit may cycle the fans and compressor unex- pectedly as control requirements dictate.
a. If container is empty, check inside for the following:
1. Check channels or T bar floor for cleanliness. Channels must be free of debris for proper air cir- culation.
2. Check container panels, insulation and door seals for damage. Effect permanent or temporary repairs.
3. Visually check evaporator fan motor mounting bolts for proper securement (refer to paragraph 6.16).
4. Check for dirt or grease on evaporator fan or fan deck and clean if necessary.
5. Check evaporator coil for cleanliness or obstruc- tions. Wash with fresh water.
6. Check defrost drain pans and drain lines for obstruc- tions and clear if necessary. Wash with fresh water.
7. Check panels on refrigeration unit for loose bolts and condition of panels. Make sure T.I.R. devices are in place on access panels.
b. Check condenser coil for cleanliness. Wash with fresh water.
c. Opencontrol box door. Check for loose electrical con- nections or hardware.
d. Check color of moisture-liquid indicator.
e. Check oil level in compressor sight glass.
4.2 CONNECT POWER
WARNING Do not attempt to remove power plug(s) be- fore turningOFF start-stop switch (ST), unit circuit breaker(s) and external power source.
WARNING Make sure the power plugs are clean and dry before connecting to any power recep- tacle.
4.2.1 Connection To 380/460 vac Power
1. Make sure start-stop switch (ST, on control panel) and circuit breaker (CB-1, in the control box) are in position 0 (OFF).
2. Plug the 460 vac (yellow) cable into a de-energized 380/460 vac, 3-phase power source. Energize the power source. Place circuit breaker (CB-1) in position I (ON). Close and secure control box door
4.2.2 Connection to190/230 vac Power An autotransformer (Figure 4-1) is required to allow operation on nominal 230 volt power. It is fitted with a 230 vac cable and a receptacle to accept the standard 460 vac power plug. The 230 volt cable is black in color while the 460 volt cable is yellow. The transformer may also be equipped with a circuit breaker (CB-2). The transformer is a step up transformer that will provide 380/460 vac, 3-phase, 50/60 hertz power to the unit when the 230 vac power cable is connected to a 190/230 vac, 3-phase power source. 1. Make sure that the start-stop switch (ST, on control panel) and circuit breakers CB-1 (in the control box and CB-2 (on the transformer) are in position 0 (OFF). Plug in and lock the 460 vac power plug at the receptacle on the transformer
2. Plug the 230 vac (black) cable into a de-energized 190/230 vac, 3-phase power source. Energize the power source. Set circuit breakers CB-1 and CB2 to position I (ON). Close and secure control box door.
1
32
1. Dual Voltage Modular Autotransformer 2. Circuit Breaker (CB-2) 230V 3. 460 vac Power Receptacle
Figure 4-1 Autotransformer
4.3 ADJUST FRESH AIR MAKEUP VENT The purpose of the fresh air makeup vent is to provide ventilation for commodities that require fresh air circulation. The ventmust be closed when transporting frozen foods. Air exchange depends on static pressure differential, which will vary depending on the container and how the container is loaded. Units may be equipped with an Vent Position Sensor (VPS). The VPS determines the position of the fresh air vent and sends data to the controller display. 4.3.1 Upper Fresh Air Makeup Vent Two slots and a stop are designed into the disc for air flow adjustments. The first slot allows for a 0 to 30% air flow, and the second slot allows for a 30 to 100%air flow. To adjust the percentage of air flow, loosen the wing nut and rotate the disc until the desired percentage of air flow matches with the arrow. Tighten the wing nut. To
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clear thegapbetween the slots, loosen thewing nut until the disc clears the stop. Figure 4-2 gives air exchange values for an empty container. Higher values can be expected for a fully loaded container.
0
30
60
90
120
150
180
210
240
0 10 20 30 40 50 60 70 80 90 100
AIR FLOW (CMH) 1-!/2
PERCENT OPEN
69NT40 FRESH AIR MAKEUP
T-BAR
2-%/8
3 T-BAR
T-BAR
ZERO EXTERNAL STATIC 50HZ
For 60HZ operation multiply curves by 1.2
Figure 4-2 Make Up Air Flow Chart 4.3.1 Fresh Air Vent Position Sensor (VPS) The VPS allows the user to determine position of the fresh air vent via function code 45. This function code is accessible via the code select key. The vent position will display for 30 seconds whenever motion corresponding to 5 CMH (3 CFM) or greater is detected. It will scroll in intervals of 5 CMH (3 CFM). Scrolling to Function Code 45 will display the Fresh Air Vent Position. Data Recording of the Sensor Position -- The position of the vent will be recorded in the DataCorder whenever the unit is running under AC power and any of the following occur:
Trip start On every power cycle Midnight Manual change greater than 5 CMH (3 CFM) and remains in that position for 5 minutes.
NOTE The user has 5 minutes to make necessary ad- justments to the vent setting. This time begins on the initial movement of the sensor. The vent can be moved to any position within the 4 min- utes. On completion of the first 4 minutes, the vent is required to remain stable for the next 4 minutes. If vent position changes are detected during the 5 minutes stability period, an alarm will be generated. This provides the user with the ability to change the vent setting without generating multiple events in the DataCorder.
4.3.2 Lower Fresh Air Makeup Vent a. Full Open or Closed Positions Maximum air flow is achieved by loosening the wing nuts and moving the cover to the maximum open
position (100% position). The closed position is 0% air flow position.The operator may also adjust the opening to increase or decrease the air flow volume to meet the required air flow.
b. Reduced Flow for Fresh Air Makeup
On some models the air slide is supplied with two adjustable air control disks. The freshairmakeup canbe adjusted for (15, 35, 50 or 75) cubic meters per hour (CMH). The air flow has been established at 60HZ power and 2 1/2 inch T bar andwith 15mm (.6 inch)H2O external static above free blow. Loosen the hex nut and adjust each disk to the required air flow and tighten hex nut.
NOTE The main air slide is in the fully closed position during reduced air flow operation.
c. Adjustment
The air slide is supplied with two adjustable air control discs. The fresh air makeup can be adjusted for 15, 35, 50and75cubicmeters per hour (CFM). Theair flowhas been established at 60Hz power, and a 2 1/2 inch T bar, with 15 mm (0.6 inch) H2O external static above free blow.
d. Air Sampling for Carbon Dioxide (CO2) Level
Loosen hex nuts and move the cover until the arrow on the cover is alignedwith the atmosphere sampling port label. Tighten the hex nuts and attach a 3/8 hose to the sampling port.
If the internal atmosphere content has reached an unacceptable level, the operator may adjust the disc opening tomeet the required air flow volume to ventilate the container.
4.4 CONNECT WATER-COOLED CONDENSER
The water-cooled condenser is used when cooling water is available and heating the surrounding air is objectionable, such as in a ships hold. If water cooled operation is desired, connect in accordance with the following subparagraphs.
4.4.1 Water--Cooled Condenser with Water Pres- sure Switch
a. Connect the water supply line to the inlet side of con- denser and the discharge line to the outlet side of the condenser. (See Figure 2-5.)
b. Maintain a flow rate of 11 to 26 liters per minute (3 to 7 gallons per minute). The water pressure switch will open to de-energize the condenser fan relay. The condenser fanmotor will stop andwill remain stopped until the water pressure switch closes.
c. To shift to air-cooled condenser operation,disconnect the water supply and the discharge line to the water- cooled condenser. The refrigeration unit will shift to air-cooled condenser operation when the water pres- sure switch closes.
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4.4.2 Water-Cooled Condenser with Condenser Fan Switch
a. Connect the water supply line to the inlet side of con- denser and the discharge line to the outlet side of the condenser. (See Figure 2-5.)
b. Maintain a flow rate of 11 to 26 lpm (3 to 7 gpm).
c. Set the condenser fan switch to position O. This will de-energize the condenser fan relay. The condenser fan motor will stop and remain stopped until the CFS switch is set to position I.
CAUTION When condenserwater flow is below 11 lpm (3 gpm) or when water-cooled operation is not in use, the CFS switch MUST be set to position 1 or the unit will not operate properly.
d. To shift to air-cooled condenser operation, stop the unit, set the CFS switch to position I and restart the unit. Disconnect the water lines to the water-cooled condenser.
4.5 CONNECT REMOTE MONITORING RECEPTACLE
If remote monitoring is required, connect remote monitor plugat unit receptacle. (See item 9, Figure 2-6.) When the remote monitor plug is connected to the remote monitoring receptacle, the following remote circuits are energized:
CIRCUIT FUNCTION Sockets B to A Energizes remote cool light Sockets C to A Energizes remote defrost light Sockets D to A Energizes remote in-range light
4.6 STARTING AND STOPPING INSTRUCTIONS
WARNING Make sure that the unit circuit breaker(s) (CB-1 & CB-2) and the START-STOP switch (ST) are in the O (OFF) position before connecting to any electrical power source.
4.6.1 Starting the Unit
1. With power properly applied, the fresh air damper set and (if required) the water cooled condenser con- nected, (refer to paragraphs 4.2, 4.3 & 4.4) place the START-STOP switch to I (ON).
2. Continue with Start Up Inspection, paragraph 4.7.
4.6.2 Stopping the Unit
To stop the unit, place the START-STOP switch in position 0 (OFF).
4.7 START--UP INSPECTION
4.7.1 Physical Inspection
a. Check rotation of condenser and evaporator fans.
b. Check compressor oil level. (Refer to paragraph 6.8.6.)
4.7.2 Check Controller Function Codes
Check and, if required, reset controller Function Codes (Cd27 through Cd39) in accordance with desired operating parameters. Refer to paragraph 3.2.2. 4.7.3 Start Temperature Recorder Partlow Recorders a. Open recorder door and wind mechanical clock or check battery of electronic recorder. Be sure key is re- turned to storage clip of mechanical recorder.
b. Lift stylus (pen) by pulling the marking tip outward un- til the stylus arm snaps into its retracted position.
c. Install new chart making sure chart is under the four corner tabs. Lower the stylus until it hasmadecontact with the chart. Close and secure door.
Saginomiya Recorders a. Open recorder door. Remove chart nut and platen. Push voltage indicator test switch to check battery condition. Replace battery if required.
b. Lift stylus (pen) by pushing in the stylus lifter and ro- tating the lifter clockwise (raising stylus at the same time) until lifter locks in position
c. Install new chart making sure chart is under the four corner tabs. Release stylus lifter by pushing down and rotating lifter counterclockwise until stylus lifter locks in position and stylus has made contact with chart. Close and secure door.
DataCORDER a. Check and, if required, set theDataCORDERConfig- uration in accordancewith desired recordingparame- ter. Refer to paragraph 3.6.3.
b. Enter a Trip Start. To enter a trip Start, do the fol- lowing:
1. Depress the ALT MODE key and scroll to Code dC30.
2. Depress and hold the ENTER key for five seconds. 3. The Trip Start event will be entered in the Data-
CORDER. 4.7.4 Complete Inspection Allow unit to run for 5minutes to stabilize conditions and perform a pre--trip diagnosis in accordance with the following paragraph.
4.8 PRE-TRIP DIAGNOSIS
CAUTION Pre-trip inspection should not be per- formed with critical temperature cargoes in the container.
CAUTION When Pre-Trip key is pressed, dehumidifi- cation and bulb mode will be deactivated. At the completion of Pre-Trip activity, dehu- midification and bulb mode must be reacti- vated.
Pre-Trip diagnosis provides automatic testing of theunit components using internal measurements and comparison logic. The program will provide a PASS or FAIL display to indicate test results. The testing begins with access to a pre-trip selection menu. The user may have the option of selecting one of
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three automatic tests (depending on software revision installed). These tests will automatically perform a series of individual pre--trip tests. The user may also scroll down to select any of the individual tests. The contents of the menus are as follows: PRE-TRIP SELECTION MENU
Auto or Auto 1 Auto 2 Auto 3
P, P1, P2, P3, P4, P5, P6, rSLts
P, P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, rSLts
P, P1, P2, P3, P4, P5, P6, P7, P8, rSLts
A detailed description of the pre-trip test codes is listed in Table 3-7, page 3-20. If no selection is made, the pre-trip menu selection process will terminate automatically. However, dehumidification and bulb mode must be reactivated manually if required.
Scrolling down to the rSLts code and pressing ENTER will allow the user to scroll through the results of the last pre--trip testing run. If no pre--testing has been run (or an individual test has not been run) since the unit was powered up -------- will be displayed.
To start a pre--trip test, do the following:
NOTE
1. Prior to starting tests, verify that unit voltage (Function Code Cd 07) is within tolerance and unit amperage draw (Function Codes Cd04, Cd05, Cd06) is within expected limits. Otherwise, tests may fail incorrectly.
2. All alarms must be rectified and cleared before starting tests.
3. Pre-trip diagnosis may also be initiated via communications. The operation is the same as for the key pad initiation described below except that should a test fail, the pre-trip mode will automatically terminate. When initiated via communications, a test may not be interrupted with an arrow key, but the pre-trip mode can be terminated with the PRE-TRIP key.
a. Press the PRE-TRIP key. This accesses a test selec- tion menu.
b. TO RUN AN AUTOMATIC TEST: Scroll through the selections by pressing the UP ARROW or DOWN ARROW keys to display AUTO, AUTO 2 or AUTO 3 as desired and then press the ENTER key.
1. The unit will execute the series of tests without any need for direct user interface. These tests vary in length, depending on the component under test.
2. While tests are running, P#-# will appear on the left display, where the #s indicate the test number and sub-test. The right displaywill showacountdown time in minutes and seconds, indicating how much time there is left remaining in the test.
CAUTION When a failure occurs during automatic testing the unit will suspend operation awaiting operator intervention.
When anautomatic test fails, it will be repeated once . A repeated test failure will cause FAIL to be shown on the right display, with the corresponding test num- ber to the left. The user may then press the DOWN ARROW to repeat the test, theUP ARROW to skip to the next test or the PRE--TRIP key to terminate test- ing. The unit will wait indefinitely, until the user manu- ally enters a command.
CAUTION When Pre--Trip test Auto 2 runs to comple- tion without being interrupted, the unit will terminate pre-trip and display Auto 2 end. Theunit will suspend operation until the user depresses the ENTER key!
When an Auto test runs to completion without a failu- re, the unit will exit the pre-trip mode, and return to normal control operation. If configuration variable CnF42 is set to IN, a datacorder trip start will be en- tered. If CnF42 is set to OUT, the trip start will not be entered. However, dehumidification and bulb mode must be reactivated manually if required.
c. TO RUN AN INDIVIDUAL TEST: Scroll through the selections by pressing the UP ARROW or DOWN ARROW keys to display an individual test code. Pressing ENTER when the desired test code is dis- played.
1. Individually selected tests, other than the LED/Dis- play test, will perform the operations necessary to verify the operation of the component. At the conclu- sion, PASS or FAIL will be displayed. This message will remain displayed for up to three minutes, during which time a user may select another test. If the three minute time period expires, the unit will termi- nate pre-trip and return to control mode operation.
2. While the tests are beingexecuted, theuser may ter- minate the pre-trip diagnostics by pressing andhold- ing the PRE-TRIP key. Theunit will then resumenor- mal operation. If the user decides to terminate a test but remain at the test selection menu, the user may press theUPARROWkey.When this is done all test outputs will be de-energized and the test selection menu will be displayed.
3. Throughout the duration of any pre-trip test except the P-7 high pressure switch tests, the current and pressure limiting processes are active .
d. Pre-Trip Test Results At the end of the pre-trip test selection menu, the message P, rSLts (pre--trip results) will be displayed. Pressing the ENTER key will allow the user to see the results for all subtests (i.e., 1-0, 1-1, etc). The resultswill be displayed as PASS or FAIL for all the tests run to completion since power up. If a test has not been run since power up, -- -- -- -- -- will be displayed. Once all pre--test activity is completed, dehumidification and bulb mode must be reactivated manually if required.
4.9 OBSERVE UNIT OPERATION 4.9.1 Crankcase Heater When the crankcase heater is installed, it will be operational whenever the compressor is off and there is
T-2854-5
power to the unit. The heater is connected to a set of normally closed auxiliary contacts on the compressor contactor.
4.9.2 Probe Check
If the DataCORDER is off, or in alarm mode the controller will revert to a four probe configuration which includes theDataCORDERsupply and return air probes as the secondary controller probes. The controller continuously performs probe diagnosis testing which compares the four probes. If the probe diagnosis result indicates a probe problem exists, the controller will perform a probe check to identify the probe(s) in error.
a. Probe Diagnostic Logic -- Standard
If the probe check option (controller configuration code CnF31) is configured for standard, the criteria used for comparison between the primary and secondary control probes is:
1_C (1.8_F) for perishable set points or 2_C (3.6_F) for frozen set points.
If 25 or more of 30 readings taken within a 30minute period are outside of the limit, then a defrost is initi- ated and a probe check is performed.
In this configuration, a probe check will be run as a part of every normal (time initiated) defrost.
b. Probe Diagnostic Logic -- Special
If the probe check option is configured for special the above criteria are applicable. A defrost with probe check will be initiated if 25 of 30 readings or 10 consecutive readings are outside of the limits
In this configuration, a probe check will not be run as a part of a normal defrost, but only as a part of a defrost initiated due to a diagnostic reading outside of the limits. c.The 30minute timer will be reset at each of the follow- ing conditions:
1. At every power up. 2. At the end of every defrost. 3. After every diagnostic check that does not fall out-
side of the limits as outlined above.
d. Probe Check A defrost cycle probe check is accomplished by energizing just the evaporator motors for eight minutes at the end of the normal defrost. At the end of the eight minute period the probes will be compared to a set of predetermined limits. The defrost indicator will remain on throughout this period.
Any probe(s) determined to be outside the limits will cause the appropriate alarm code(s) to be displayed to identify which probe(s) needs to be replaced. The P5 Pre-Trip test must be run to inactivate alarms.
4.10 SEQUENCE OF OPERATION General operation sequences for cooling, heating and defrost are provided in the following subparagraphs. Schematic representation of controller action are provided in Figure 4-3 and Figure 4-4. Refer to Section 3 for detailed descriptions of special events and timers that are incorporated by the controller in specific modes of operation. Refer to paragraph 4.11 for emergency modes of operation
SET POINT
FALLING TEMPERATURE
RISING TEMPERATURE
- 1.5_C (2.7_F)
- 1_C (1.8_F)
- 0.5_C (0.9_F) - 0.20_C
+.20_C
+1.5_C (2.7_F)
+1_C (1.8_F)
+0.5_C (0.9_F)
HEATINGHEATING
MODULATING COOLING
AIR CIRCULATION
AIR CIRCULATION
MODULATING COOLING
+2.5_C (4.5_F)
Figure 4-3 Controller Operation -- Perishable Mode
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AIR CIRCULATION
ONLY
SET POINT
FALLING TEMPERATURE
RISING TEMPERATURE
- 1.5_C (2.7_F)
- 1_C (1.8_F)
- 0.5_C (0.9_F) - 0.20_C
+.20_C
+1.5_C (2.7_F)
+1_C (1.8_F)
+0.5_C (0.9_F)
COOLING
AIR CIRCULATION
ONLY
COOLING
Figure 4-4 Controller Operation -- Frozen Mode
CONTROL TRANSFORMER
POWER TO CONTROLLER
SIGNAL TO CONTROLLER
SIGNAL TO CONTROLLER
ENERGIZED DE--ENERGIZED
FOR FULL DIAGRAM AND LEGEND, SEE SECTION 7
NOTE: HIGH SPEED EVAPORATOR FAN SHOWN. FOR LOW SPEED CONTACT TE IS DE--ENERGIZED AND CONTACT TV IS ENERGIZED
Figure 4-5 Perishable Mode Cooling
4.10.1 Sequence Of operation -- Perishable Mode Cooling
NOTE In the Conventional Perishable Mode of opera- tion the evaporator motors run in high speed. In the Economy PerishableMode the fan speed is varied.
NOTE In low temperature ambients the condenser fan will be cycled by the controller to maintain prop- er condensing pressure.
a. With supply air temperature above set point and de- creasing, the unit will be cooling with the condenser fan motor (CF), compressor motor (CH), evaporator fan motors (EF) energized and the COOL light illumi- nated. (See Figure 4-5.)
b. When the air temperature decreases to a predeter- mined tolerance above set point, the in-range light is illuminated.
c. As the air temperature continues to fall, modulating cooling starts at approximately 2.5_C (4.5_F) above set point. (See Figure 4-3)
d. The controller monitors the supply air. Once the sup- ply air falls below set point and 0% SMV position is reached, the controller periodically records the sup- ply air temperature, set point and time. A calculation is then performed by subtracting the set point reading from the supply air and multiplying the result by the time reading. The result is negative number.
e. When the calculation reaches --250, contacts TC and TN are opened to de-energize compressor and con- denser fan motors. The cool light is also de-ener- gized.
f. Theevaporator fanmotors continue to run to circulate air throughout the container. The in-range light re- mains illuminated as long as the supply air is within tolerance of set point.
g. When the supply air temperature increases to 0.2_C (0.4_F) above set point and the three minute off time has elapsed, relays TC and TN are energizes to re- start the compressor and condenser fan motors. The cool light is also illuminated.
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4.10.2 Sequence Of Operation -- Perishable Mode Heating
NOTE The unit will heat only when in the Perishable Mode, relay TH is electronically locked out when in the Frozen Mode.
a. If the air temperature decreases 0.5_C (0.9_F) below set point, the system enters the heating mode. (See Figure 4-3). The controller closes contacts TH (see Figure 4-6) to allow power flow through the heat ter- mination thermostat (HTT) to energize the heaters (HR). The HEAT light is also illuminated. The evapo- rator fans continue to run to circulate air throughout the container.
b. When the temperature rises to 0.2_C (0.4_F) below set point, contact TH opens to de--energize the heat- ers. TheHEAT light is also de--energized. Theevapo- rator fans continue to run to circulate air throughout the container.
c. A safety heater termination thermostat (HTT), at- tached to an evaporator coil support, will open the heating circuit if overheating occurs.
CONTROL TRANSFORMER
POWER TO CONTROLLER
SIGNAL TO CONTROLLER
SIGNAL TO CONTROLLER
ENERGIZED DE--ENERGIZED
FOR FULL DIAGRAM AND LEGEND, SEE SECTION 7
Figure 4-6 Perishable Mode Heating
4.10.3 Sequence Of operation -- Frozen Mode Cooling
NOTES
1. In the Frozen Mode of operation the evaporator motors run in low speed.
2. In low temperature ambients the condenser fan will be cycled by the controller to maintain proper condensing pressure.
a. With supply air temperature above set point and de- creasing, the unit will be cooling with the condenser fan motor (CF), compressor motor (CH), evaporator
fan motors (ES) energized and the COOL light illumi- nated. (See Figure 4-7.)
b.When the air temperature decreases to a predeter- mined tolerance above set point, the in-range light is illuminated.
CONTROL TRANSFORMER
POWER TO CONTROLLER
SIGNAL TO CONTROLLER
SIGNAL TO CONTROLLER
ENERGIZED DE--ENERGIZED
FOR FULL DIAGRAM AND LEGEND, SEE SECTION 7
Figure 4-7 Frozen Mode
c. Contacts TC and TN are opened to de-energize the compressor and condenser fan motors when the re- turn air temperature decreases to 0.2_C (0.4_F) be- low set point. The cool light is also de-energized.
d. Theevaporator fanmotors continue to run to circulate air throughout the container. The in-range light re- mains illuminatedas longas the return air is within tol- erance of set point.
e. When the return air temperature increases to 0.2_C (0.4_F) above set point and the three minute off time has elapsed, relays TC and TN are energizes to re- start the compressor and condenser fan motors. The cool light is also illuminated.
4.10.4 Sequence Of Operation -- Defrost
The defrost cycle may consist of up to three distinct operations. The first is de-icing of the coil, the second is a probe check cycle and the third is snap freeze.
Defrost may be requested by any one of the following methods:
1. The manual defrost function (also manual defrost switch function if equipped) is initiated. Through the use of the keypad or manual defrost switch (if equipped).
NOTE The Manual Defrost / Interval key can be used to initiate a manual defrost. MinimumSoftware release version #5126 is required in order for to use this function
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Manual Defrost/Interval key operation: Depressing and holding the Defrost Interval key for five (5) seconds will initiate defrost. If the defrost in- terval key is released in less than five (5) seconds, defrost interval (code 27) shall be displayed.
2. The user sends a defrost request by communica- tions.
3. The defrost interval timer (controller function code Cd27) reaches the defrost interval set by the user.
4. The controller probediagnostic logic determines that a probe check is necessary based on the tempera- ture values currently reported by the supply and re- turn probes.
5. The controller Demand Defrost configuration vari- able (CnF40) is set to In and the unit has been in pull down operation for over 2.5 hours without reach- ing set point.
CONTROL TRANSFORMER
POWER TO CONTROLLER
SIGNAL TO CONTROLLER
SIGNAL TO CONTROLLER
ENERGIZED DE--ENERGIZED
FOR FULL DIAGRAM AND LEGEND, SEE SECTION 7
SIGNAL TO CONTROLLER
Figure 4-8 Defrost Processing of a defrost request is controlled by the Defrost Termination Thermostat. The Defrost Termination Thermostat is not a physical component. It is a software point that acts as a thermostat, allowing defrost when it is considered closed and preventing or terminating defrost when it is considered open. The actual temperatures used to make the open or closed determinations are dependent on the type of defrost request made and the operator setting of configuration variable CnF41. Configuration variable CnF41may be factory set at the default value of 25.6C(78F) or a lower value of 18C(64F). When a request for defrost is made by the use of the Manual Defrost Switch or Communications, the unit will enter defrost when the reading at the Defrost Temperature Sensor is at or below the CnF41 setting. Defrost will terminate when the Defrost Sensor Temperature reading rises above the CnF41 setting. When a request for defrost is made by probe check, the unit will enter defrost when the Defrost Temperature Sensor reading is at or below 25.6C(78F). The unit will terminate defrost when the Defrost Temperature Sensor reading rises above 25.6C(78F)
When a request for defrost is made by demand defrost , the unit will enter defrost when the readingat theDefrost Temperature Sensor is at or below 18C (64.4F). Defrost will terminate when the Defrost Sensor Temperature reading rises above the CnF41 setting. When a defrost has terminated, the defrost interval timer will begin countingwhen the readingat theDefrost Temperature Sensor is at or below 10C(50F). Once the timer has counted the required time, the unit will enter defrost if the Defrost Temperature Sensor is at or below 25.6C(78F). Defrost will terminate when the Defrost Sensor Temperature reading rises above the CnF41 setting. When the unit enters defrost, the controller opens contacts TC, TN and TE (or TV) to de-energize the compressor, condenser fan and evaporator fans. (See Figure 4-8.) The COOL light is also de--energized. The controller then closes TH to supply power to the heaters. The defrost light is illuminated. When the defrost temperature sensor reading rises to the applicable Defrost Termination Thermostat opening point the de--icing operation is terminated. If defrost does not terminate correctly and temperature reaches the set point of the heat termination thermostat (HTT) the thermostat will open to de--energize the heaters. If termination does not occur within 2.0 hours, the controller will terminate defrost. An alarm will be given of a possible DTS failure. If probe check (controller function code CnF31) is configured to special, the unit will proceed to the next operation (snap freeze or terminate defrost). If the code is configured to standard, the unit will perform a probe check. The purpose of the probe check is to detect malfunctions or drift in the sensed temperature that is too small to be detected by the normal sensor out of range tests. The system will run for eight minutes in this condition. At the end of the eight minutes, probe alarms will be set or cleared based on the conditions seen. When the return air falls to 7_C (45_F), the controller checks to ensure the defrost temperature sensor (DTS) reading has dropped to 10_C or below. If it has not, a DTS failure alarm is given and the defrost mode is operated by the return temperature sensor (RTS). If controller function code CnF33 is configured to snap freeze, the controller will sequence to this operation. The snap freeze consists of running the compressor without the evaporator fans in operation for a period of four minutes with the suction modulation valve at maximum allowed opening. When the snap freeze is completed, defrost is formally terminated.
T-2854-9
4.11 EMERGENCY OPERATION Operation by the refrigeration controller may be overridden by use of the EMERGENCY BYPASS or by use of the EMERGENCY DEFROST switch. The EMERGENCY BYPASS switch functions to bypass the controller in the event of controller failure, The EMERGENCY DEFROST switch functions to bypass the controller and place the unit in the defrost mode. 4.11.1 Emergency Bypass Operation. To place the unit in the emergency bypass mode of operation, cut the wire tie installed at the switch mounting (see Figure 2-6) and place the switch in the EMERGENCY BYPASS COOLING position. The switch is a normally open four pole switch which is placed in the EMERGENCY BYPASS COOLING position to: a. Provide power to the compressor contactor with the high pressure switch and compressor motor internal protector in line.
b. Provide power to the condenser fan motor contactor with the water pressure switch and condenser motor internal protector in line.
c. Provide power to the evaporator fan motor high speed contactors with the evaporator fan motor inter- nal protectors in line.
d. Provide power to the bypass module (item15, Figure 2-3). The bypass module supplies power to the stepper motor drive to bring the valve to the full open position.
CAUTION The unit will remain in the full coolingmode as long as the emergency bypass switch is in theBYPASS position. If the cargo may be damagedby low temperatures, theoperator must monitor container temperature and manually cycle operation as required to maintain temperature within required lim- its.
To return theunit to normal operation, place the switch in the NORMALOPERATION position. When emergency oparation is no longer required, re--install the wire tie at the switch mounting.
4.11.2 Emergency Defrost Operation.
To place the unit in the emergency defrost mode of operation, cut the wire tie installed at the switch mounting (see Figure 2-6) and place the switch in the EMERGENCY DEFROST position.
NOTE
1. If the unit is in the emergency bypass cooling mode, the emergency defrost switch will override this mode and place the unit in defrost.
2. The IN--RANGE LIGHT is de--energized when in the emergency defrost mode.
The switch is a normally open four pole switch which is placed in the EMERGENCY DEFROST position to:
a. De--energize the compressor, condenser fan and evaporator fan contactors.
b. Illuminate the EMERGENCY DEFROST LIGHT.
c. Energize the heater contactor.
d. Illuminate the DEFROST LIGHT.
CAUTION The unit will remain in the DEFROST mode as long as the emergency defrost switch is in the DEFROST position. To prevent cargo damage, the operator must monitor con- tainer temperature and manually cycle op- eration as required to maintain temperature within required limits.
To return theunit to normal operation, place the switch in the NORMALOPERATION position. When emergency defrost is no longer required, re--install the wire tie at the switch mounting.
5-1 T-285
SECTION 5 TROUBLESHOOTING
CONDITION POSSIBLE CAUSE REMEDY/
REFERENCE SECTION
5.1 UNIT WILL NOT START OR STARTS THEN STOPS
External power source OFF Turn on
No power to unit Start-Stop switch OFF or defective Check Circuit breaker tripped or OFF Check Autotransformer not connected 4.2.2 Circuit breaker OFF or defective Check
Loss of control power Control transformer defective Replace Fuse (F3) blown Check Start-Stop switch OFF or defective Check Evaporator fan motor internal protector open 6.16 Condenser fan motor internal protector open 6.11
Component(s) Not Operating Compressor internal protector open 6.8 High pressure switch open 5.7 Heat termination thermostat open Replace Low line voltage Check
Compressor hums, but does not Single phasing Check start Shorted or grounded motor windings 6.8
Compressor seized 6.8
5.2 UNIT OPERATES LONG OR CONTINUOUSLY IN COOLING
Container Hot load (Failure to Pre--cool) Normal Defective box insulation or air leak Repair Unit in Emergency Bypass mode. 4.11.1 Shortage of refrigerant 6.7.1 Evaporator coil covered with ice 5.6 Evaporator coil plugged with debris 6.15 Evaporator fan(s) rotating backwards 6.15/6.16 Defective evaporator fan motor/capacitor 6.17
Refrigeration System Air bypass around evaporator coil Check Controller set too low Reset Compressor service valves or liquid line shutoff valve par- tially closed
Open valves completely
Dirty condenser 6.10 Compressor worn 6.8 Current limit (function code Cd32) set to wrong value 3.3.5 Suction modulation valve malfunction 6.18
5-2T-285
CONDITION POSSIBLE CAUSE REMEDY/
REFERENCE SECTION
5.3 UNIT RUNS BUT HAS INSUFFICIENT COOLING
Compressor Compressor valves defective 6.8 Abnormal pressures 5.7 Controller malfunction 5.9
Refrigeration System Evaporator fan or motor defective 6.16 Suction modulation valve malfunction 6.18 Condenser Pressure Transducer defective Check Shortage of refrigerant 6.7.1
5.4 UNIT WILL NOT HEAT OR HAS INSUFFICIENT HEATING
Start-Stop switch OFF or defective Check
No operation of any kind Circuit breaker OFF or defective Check External power source OFF Turn ON Circuit breaker or fuse defective Replace Control Transformer defective Replace
No control power Evaporator fan internal motor protector open 6.16 Heat relay defective Check Heater termination switch open 6.15 Heater(s) defective 6.15 Heater contactor or coil defective Replace Evaporator fan motor(s) defective or rotating backwards 6.15/6.16
Unit will not heat or has insuffi- Evaporator fan motor contactor defective Replace cient heat Controller malfunction 5.9
Defective wiring Replace Loose terminal connections Tighten Low line voltage 2.3
5.5 UNIT WILL NOT TERMINATE HEATING
Controller improperly set Reset
Unit fails to stop heating Controller malfunction 5.9 Heater termination thermostat remains closed along with the heat relay 6.15
5.6 UNIT WILL NOT DEFROST PROPERLY
Defrost timer malfunction (Cd27) Table 3-5 Loose terminal connections Tighten/
Will not initiate defrost i ll
Defective wiring Replace automat ca y Defrost temperature sensor defective or heat termination
thermostat open Replace
Heater contactor or coil defective Replace
Will not initiate defrost Manual defrost switch defective Replace manually Defrost temperature sensor open 4.10.4 Initiates but relay (DR) drops out Low line voltage 2.3
Initiates but does not defrost Heater contactor or coil defective Replace Heater(s) burned out 6.15
5-3 T-285
CONDITION POSSIBLE CAUSE REMEDY/
REFERENCE SECTION
5.6 UNIT WILL NOT DEFROST PROPERLY --Continued
Frequent defrost Wet load Normal Will not terminate defrost Unit in Emergency Defrost mode 4.11.2
5.7 ABNORMAL PRESSURES (COOLING)
Condenser coil dirty 6.10 Condenser fan rotating backwards 6.11 Condenser fan inoperative 6.11
High discharge pressure Refrigerant overcharge or noncondensibles 6.7.1 Discharge pressure regulator valve defective Replace Discharge service valve partially closed Open Suction modulation valve malfunction 6.18 Suction service valve partially closed Open Filter-drier partially plugged 6.13 Low refrigerant charge 6.7.1 Expansion valve defective 6.14
Low suction pressure No evaporator air flow or restricted air flow 6.15 Excessive frost on evaporator coil 5.6 Evaporator fan(s) rotating backwards 6.16.3 Discharge pressure regulator valve defective Replace Suction modulation valve malfunction 6.18
Suction and discharge pres- Heat exchanger defective Replace sures tend to equalize when unit i ti
Compressor valves defective 6.8 s opera ng Compressor cycling/stopped Check
5.8 ABNORMAL NOISE OR VIBRATIONS
Loose mounting bolts Tighten Worn bearings 6.8
Compressor Worn or broken valves 6.8 Liquid slugging 6.14 Insufficient oil 6.8.6 Bent, loose or striking venturi Check
Condenser or Evaporator Fan Worn motor bearings 6.11/6.16 Bent motor shaft 6.11/6.16
5.9 CONTROLLER MALFUNCTION
Defective Sensor 6.22
Will not control Defective wiring Check Fuse (F1, F2) blown Replace Stepper motor suction modulation valve circuit malfunction 6.18
5-4T-285
CONDITION POSSIBLE CAUSE REMEDY/
REFERENCE SECTION
5.10 NO EVAPORATOR AIR FLOW OR RESTRICTED AIR FLOW
Evaporator coil blocked Frost on coil 5.6 Dirty coil 6.15 Evaporator fan motor internal protector open 6.16
No or partial evaporator air flow Evaporator fan motor(s) defective 6.16 Evaporator fan(s) loose or defective 6.16 Evaporator fan contactor defective Replace
5.11 THERMOSTATIC EXPANSION VALVE MALFUNCTION
Low refrigerant charge 6.7.1 External equalizer line plugged Open Wax, oil or dirt plugging valve or orifice Ice formation at valve seat 6.14
Low suction pressure with high superheat
Superheat too high 6.7.1 Power assembly failure Loss of element/bulb charge
6 14 Broken capillary
.
Foreign material in valve
Hi h i i h l Superheat setting too low 6.14
g suct on pressure w t ow superheat External equalizer line plugged Ice holding valve open Open
Foreign material in valve 6.14
Liquid slugging in compressor Pin and seat of expansion valve eroded or held open by foreign material
6 1 Fluctuating suction pressure
Improper bulb location or installation . 4
Low superheat setting
5.12 AUTOTRANSFORMER MALFUNCTION
Circuit breaker (CB-1 or CB-2) tripped Check
Unit will not start Autotransformer defective 6.19 Power source not turned ON Check 460 VAC power plug is not inserted into the receptacle 4.2.2
5.13 WATER-COOLED CONDENSER OR WATER PRESSURE SWITCH
High discharge pressure Dirty coil
6 12 Noncondensibles
.
Condenser fan starts and stops Water pressure switch malfunction Check Water supply interruption Check
T-2856-1
SECTION 6
SERVICE
NOTE To avoid damage to the earths ozone layer, use a refrigerant recovery system whenever removing refriger- ant. When working with refrigerants you must comply with all local government environmental laws. In the U.S.A., refer to EPA section 608.
WARNING Neveruseair for leak testing. It has beende- termined that pressurized, mixtures of re- frigerant and air can undergo combustion when exposed to an ignition source.
6.1 SECTION LAYOUT
Service procedures are provided herein beginning with refrigeration system service, then refrigeration system component service, electrical system service, temperature recorder service and general service. Refer to the Table Of Contents to locate specific topics.
6.2 SERVICE VALVES
The compressor suction, compressor discharge and liquid line service valves (see Figure 6-1) are provided with adouble seat andagaugeconnectionwhichenable servicing of the compressor and refrigerant lines. Turning the valve stem clockwise (all the way forward) will frontseat the valve to close off the suction, discharge or liquid line and open the gauge port to the compressor or low side. Turning the stem counterclockwise (all the way out) will backseat the valve to open the connections and close off the port
With the valve stem midway between frontseat and backseat, the lines are open to both the connectionsand the gauge connection.
For example, the valve stem is first fully backseated when connecting a manifold gauge to measure pressure. Then, the valve is opened 1/4 to 1/2 turn to measure the pressure.
VALVE FRONTSEATED (Clockwise)
VALVE BACKSEATED (Counterclockwise)
5
1
2 3
4
1. Suction, Discharge or Liquid Line Connection
2. Service Port
3. Stem Cap 4. Valve stem 5. Compressor Or Filter
Drier Inlet Connection
Figure 6-1 Service Valve
OPENED (Backseated ) HAND VALVE
CLOSED (Frontseated) HAND VALVE
SUCTION PRESSURE GAUGE
DISCHARGE PRESSURE GAUGE
A B C
A. CONNECTION TO LOW SIDE OF SYSTEM B. CONNECTION TO EITHER:
REFRIGERANT CYLINDER OR OIL CONTAINER
C. CONNECTION TO HIGH SIDE OF SYSTEM
Figure 6-2 Manifold Gauge Set
6.3. MANIFOLD GAUGE SET The manifold gauge set (see Figure 6-2) is used to determine system operating pressure, add refrigerant charge, and to equalize or evacuate the system. When the suction pressure hand valve is frontseated (turned all the way in), the suction (low) pressure can be checked. When the discharge pressure hand valve is frontseated, the discharge (high) pressure can be checked. When both valves are open (turned counter-clockwise all the way out), high pressure vapor will flow into the low side. When the suction pressure valve is openand thedischarge pressure valve shut, the system can be charged. Oil can also be added to the system. A R-134a manifold gauge/hose set with self-sealing hoses (see Figure 6-3) is required for service of the models covered within this manual. The manifold gauge/hose set is available from Carrier Transicold. (Carrier Transicold P/N 07-00294-00, which includes items 1 through 6, Figure 6-3.) To perform service using the manifold gage/hose set, do the following: a. Preparing Manifold Gauge/Hose Set For Use 1. If the manifold gauge/hose set is new or was
exposed to the atmosphere it will need to be eva- cuated to remove contaminants and air as follows:
2. Back seat (turn counterclockwise )both field service couplings (see Figure 6-3) and midseat both hand valves.
3. Connect the yellow hose to a vacuum pump and re- frigerant 134a cylinder.
4. Evacuate to 10 inches of vacuum and then charge with R-134a to a slightly positive pressure of 0.1 kg/ cm@ (1.0 psig).
6-2T-285
5. Front seat both manifold gauge set valves and dis- connect from cylinder. The gauge set is now ready for use.
To Low Side Service Port
To High Side Service Port
- Red
- Yellow
Blue
Red KnobBlue Knob
1
2
3
3
3 2
4
56 4
1. Manifold Gauge Set 2. Hose Fitting (0.5-16 Acme) 3. Refrigeration and/or Evacuation Hose . (SAE J2196/R-134a) 4. Hose Fitting w/O-ring (M14 x 1.5) 5. High Side Field Service Coupling 6. Low Side Field Service Coupling
Figure 6-3 R-134a Manifold Gauge/Hose Set
b. Connecting Manifold Gauge/Hose Set
Connection of the manifold gauge/hose set (see Figure 6-4) is dependent on the component being serviced. If only the compressor is being serviced, the high side coupling is connected to the discharge service valve. For service of the low side (after pump down), the high side coupling is connected to the liquid line service valve. The center hose connection is brought to the tool being used. To connect themanifold gauge/hose set, do the following.
1. Remove service valve stem caps and check tomake sure they are backseated. Remove service port caps. (See Figure 6-1)
2. Connect the high side field service coupling (see Figure 6-3) to the discharge or liquid line valve ser- vice valve port.
3. Turn the high side field service coupling knob (red) clockwise, which will open the high side of the sys- tem to the gauge set.
4. Connect the low side field service coupling to the suction service valve port.
5. Turn the low side field service coupling knob (blue) clockwise, whichwill open the low side of the system to the gauge set.
6. To read system pressures: slightly midseat the high side and suction service valves.
6
4
5 7-BLUEDS
10
1 2 3
8-YELLOW 9-RED
13 11
12
1. Discharge Service Valve
2. Compressor 3. Suction Service Valve 4. Receiver or Water
Cooled Condenser 5. Liquid Service Valve 6. Vacuum Pump
7. Low Side Hose 8. Center Hose 9. High Side Hose 10. Electronic Vacuum
Gauge 11. Manifold Gauge Set 12. Refrigerant Cylinder 13. Reclaimer
Figure 6-4. Refrigeration System Service Connections
CAUTION To prevent trapping liquid refrigerant in the manifold gaugeset besure set is brought to suction pressure before disconnecting.
c. Removing the Manifold Gauge Set 1. While the compressor is still ON, backseat the high
side service valve. 2. Midseat both hand valves on the manifold gauge set
and allow the pressure in the manifold gauge set to be drawn down to suction pressure. This returns any liquid thatmay be in thehigh sidehose to the system.
3. Backseat the suction service valve. Backseat both field service couplings and frontseat both manifold set valves. Remove the couplings from the service ports.
4. Install both service valve stem caps and service port caps (finger-tight only).
6.4 PUMPING THE UNIT DOWN
To service the filter-drier, moisture-liquid indicator, expansion valve, suction modulation valve, quench valve or evaporator coil, pump the refrigerant into the high side as follows: a. Attach manifold gauge set to compressor service valves. Refer to paragraph 6.3.
b. Start the unit and run in a cooling mode for 10 to 15 minutes. Frontseat the liquid line service valve. Place start-stop switch in theOFFpositionwhen the suction reaches a positive pressure of 0.1 kg/cm@ (1.0 psig).
T-2856-3
c. Frontseat the suction service valve. The refrigerant will be trapped between the compressor suction ser- vice valve and the liquid line valve.
d. Before opening up any part of the system, a slight positive pressure should be indicatedon thepressure gauge. If a vacuum is indicated, emit refrigerant by cracking the liquid line valvemomentarily to build upa slight positive pressure.
e. When opening up the refrigerant system, certain parts may frost. Allow the part to warm to ambient temperature before dismantling. This avoids internal condensation which puts moisture in the system.
f. After repairs have been made, be sure to perform a refrigerant leak check (refer to paragraph 6.5), and evacuate and dehydrate the low side (refer to para- graph 6.6).
g. Check refrigerant charge (refer to paragraph 6.7).
6.5 REFRIGERANT LEAK CHECKING
WARNING Never use air for leak testing. It has been determined that pressurized, air-rich mix- tures of refrigerants and air can undergo combustion when exposed to an ignition source.
a. The recommended procedure for finding leaks in a system is with a R-134a electronic leak detector. Testing joints with soapsuds is satisfactory only for locating large leaks.
b. If the system iswithout refrigerant, charge the system with refrigerant 134a to build uppressure between2.1 to 3.5 kg/cm@ (30 to 50 psig). Remove refrigerant cyl- inder and leak-check all connections.
NOTE Only refrigerant 134a should be used to pres- surize the system. Any other gas or vapor will contaminate the system, which will require additional purging and evacuation of the sys- tem.
c. If required, remove refrigerant using a refrigerant recovery system and repair any leaks.
d. Evacuate anddehydrate theunit. (Refer to paragraph 6.6.)
e. Charge unit per paragraph 6.7.
6.6 EVACUATION AND DEHYDRATION
6.6.1 General Moisture is the deadly enemy of refrigeration systems. The presence of moisture in a refrigeration system can have many undesirable effects. The most common are copper plating, acid sludge formation, freezing-up of metering devices by free water, and formation of acids, resulting in metal corrosion. 6.6.2 Preparation a. Evacuate anddehydrate only after pressure leak test. (Refer to paragraph 6.5.)
b. Essential tools to properly evacuate and dehydrate any system include a vacuum pump (8 m3/hr = 5 cfm volume displacement) and an electronic vacuum gauge. (The pump is available from Carrier Trans- icold, P/N 07-00176-11.)
c. If possible, keep the ambient temperature above 15.6_C (60_F) to speed evaporation of moisture. If the ambient temperature is lower than 15.6_C (60_F), ice might form before moisture removal is complete. Heat lamps or alternate sources of heat may be used to raise the system temperature.
d. Additional timemay be saved during a complete sys- tem pump down by replacing the filter-drier with a section of copper tubing and the appropriate fittings. Installation of a new drier may be performed during the charging procedure.
6.6.3 Procedure - Complete system a. Remove all refrigerant using a refrigerant recovery system.
b. The recommended method to evacuate and dehy- drate the system is to connect three evacuation hoses (see Figure 6-5) to the vacuum pump and refrigeration unit. Be sure the service hoses are suited for evacuation purposes.
c. Test the evacuation setup for leaks by backseating the unit service valves and drawing a deep vacuum with the vacuum pump and gauge valves open. Shut off the pump and check to see if the vacuum holds. Repair leaks if necessary.
d. Midseat the refrigerant system service valves. e. Open the vacuum pump and electronic vacuum gauge valves, if they are not already open. Start the vacuum pump. Evacuate unit until the electronic vac- uum gauge indicates 2000 microns. Close the elec- tronic vacuum gauge and vacuum pump valves. Shut off the vacuum pump. Wait a few minutes to be sure the vacuum holds.
f. Break the vacuum with clean dry refrigerant 134a gas. Raise system pressure to approximately 0.2 kg/ cm@ (2 psig), monitoring it with the compound gauge.
g. Remove refrigerant using a refrigerant recovery sys- tem.
h. Repeat steps e.and f. one time.
6-4T-285
6
4 5
7 DS
10
1
2 3
8
9
1. Reclaimer 2. Discharge Service
Valve 3. Compressor 4. Suction Service Valve 5. Receiver or Water
Cooled Condenser
6. Liquid Service Valve 7. Vacuum Pump 8. Electronic Vacuum
Gauge 9. Manifold Gauge Set 10. Refrigerant Cylinder
Figure 6-5. Compressor Service Connections
i. Remove the copper tubing and change the filter-drier. Evacuate unit to 500 microns. Close the electronic vacuumgaugeandvacuumpumpvalves. Shut off the vacuum pump. Wait five minutes to see if vacuum holds. This procedure checks for residual moisture and/or leaks.
j. With a vacuum still in the unit, the refrigerant charge may be drawn into the system from a refrigerant con- tainer on weight scales. Continue to paragraph 6.7
6.6.4 Procedure - Partial System
a. If the refrigerant charge has been removed from the compressor for service, evacuate only the compres- sor by connecting the evacuation set--up at the com- pressor service valves. Follow evacuation proce- dures of the preceding paragraph except leave compressor service valves frontseated until evacua- tion is completed.
b. If refrigerant charge has been removed from the low side only, evacuate the low side by connecting the evacuation set--up at the compressor service valves and liquid service valve except leave the service valves frontseated until evacuation is completed.
c. Once evacuation has been completed and the pump has been isolated, fully backseat the service valves to isolate the service connections and then continue with checking and, if required, adding refrigerant in accordance with normal procedures
6.7 REFRIGERANT CHARGE 6.7.1 Checking the Refrigerant Charge
NOTE To avoid damage to the earths ozone layer, use a refrigerant recovery systemwhenever remov- ing refrigerant. When working with refrigerants youmust complywith all local government envi- ronmental laws. In theU.S.A., refer to EPAsec- tion 608.
a. Connect the gauge manifold to the compressor dis- charge and suction service valves. For units operat- ing on a water cooled condenser, change over to air cooled operation.
b. Bring the container temperature to approximately 1.7_C (35_F) or --17.8_C (0_F). Then set the control- ler set point to --25_C (--13_F) to ensure that the suc- tion modulation valve is at maximum allowed open position.
c. Partially block the condenser coil inlet air. Increase the area blocked until the compressor discharge pressure is raised to approximately 12 kg/cm@ (175 psig).
d. On units equippedwith a receiver, the level should be between the glasses. On units equipped with a water cooled condenser, the level should be at the center of the glass. If the refrigerant level is not correct, contin- uewith the following paragraphs to add or remove re- frigerant as required.
6.7.2 Adding Refrigerant to System (Full Charge) a. Evacuate unit and leave in deep vacuum. (Refer to paragraph 6.6.)
b. Place cylinder of R-134aon scale and connect charg- ing line from cylinder to liquid line valve. Purge charg- ing line at liquid line valve and then note weight of cyl- inder and refrigerant.
c. Open liquid valve on cylinder. Open liquid line valve half-way and allow the liquid refrigerant to flow into the unit until the correct weight of refrigerant (refer to paragraph 2.2) has been added as indicated by scales.
NOTE It may be necessary to finish charging unit through suction service valve in gas form, due to pressure rise in high side of the system. (Refer to section paragraph 6.7.3)
d. Backseat manual liquid line valve (to close off gauge port). Close liquid valve on cylinder.
e. Start unit in coolingmode. Runapproximately 10min- utes and check the refrigerant charge.
6.7.3 Adding Refrigerant to System (Partial Charge)
a. Examine the unit refrigerant system for any evidence of leaks. Repair as necessary. (Refer to paragraph 6.5.)
b. Maintain the conditions outlined in paragraph 6.7.1 c. Fully backseat the suction service valve and remove the service port cap.
d. Connect charging line between suction service valve port and cylinder of refrigerant R-134a. OpenVAPOR valve.
T-2856-5
e. Partially frontseat (turn clockwise) the suction service valve and slowly add charge until the refrigerant appears at the proper level .
6.8 COMPRESSOR
WARNING Make sure power to the unit is OFF and power plug disconnected before replacing the compressor.
NOTES
1 The compressor should not operate in a vacuum greater than 500 mm/hg (20 inches/hg).
2 The service replacement compressor is sold without shutoff valves (but with valve pads), and without terminal box and cover. Customer should retain the original terminal box, cover, and high pressure switch for use on replacement compressor.
3 Check oil level in service replacement compressor. (Refer to paragraph 6.8.6.)
4 A compressor terminal wiring kit must be ordered as a separate item when ordering replacement compressor. Appropriate installation instructions are included with kit.
5 Refer to Table 6-7 and Table 6-8 for applicable compressor wear limits and torque values.
6 Refer to Figure 6-37 for charts on compressor pressure, temperature and motor current curves.
6.8.1 Removal and Replacement of Compressor
a. Remove the protective guard from lower section of the unit.
b. Pump down low side (refer to paragraph 6.4) or front- seat compressor service valves and remove refriger- ant from compressor using a refrigerant recovery system.
c. Locate the compressor junction box. Tag and discon- nect wiring from compressor terminals and remove compressor junction box.
d. Loosen service valve mounting bolts, break seal and then remove bolts.
e. Remove compressor plate mounting bolts.
f. Remove compressor and mounting plate. Refer to paragraph 2.2 for weight of compressor.
g. Remove high pressure switch (HPS) from compres- sor and check operation of switch (refer to paragraph 6.9.2).
1 2 3
4
5 6
7810 11
12
13
14
15
9
16
1. Discharge Valve Flange
2. High Side Pressure Connection
3. Low Side Pressure Connection
4. Suction Valve Flange 5. Motor End Cover 6. Serial/Model No. Plate 7. Crankcase Heater
8. Bottom Plate 9. Sight Glass 10. Oil Drain Plug 11. Oil Charging Valve 12. Bearing Head 13. Oil Pump 14. Oil Fill Plug 15. Cylinder Head 16. Valve Plate
Figure 6-6 Compressor
h. Remove compressor mounting bolts from mounting plate and install mounting plate on replacement com- pressor.
i. Install replacement compressor terminal wiring kit, following instructions included with kit.
j. Install high pressure switch on compressor.
k. Install compressor and mounting plate in unit.
l. Connect junction box(es) to compressor and connect all wiring per wiring diagram. Install junction box cover(s).
m.Install new gaskets on service valves.
n. Install mounting bolts in service valves and torque to 2.77 to 4.15 mkg (20-30 ft/lb).
o. Attach two hoses (with hand valves near vacuum pump) to the suction and discharge service valves. Dehydrate and evacuate compressor to 500microns (75.9 cm Hg vacuum = 29.90 inches Hg vacuum). Turn off valves on both hoses to pump.
p. Fully backseat (open) both suction and discharge service valves.
q. Remove vacuum pump lines.
r. Start unit and check refrigerant charge. (Refer to paragraph 6.7.)
s. Check moisture-liquid indicator for wetness. Change filter-drier if necessary. (Refer to paragraph 6.13.)
t. Check compressor oil level per paragraph 6.8.6. Add oil if necessary.
6-6T-285
6.8.2 Compressor Disassembly
WARNING Before disassembly of any external com- pressor component make sure to relieve possible internal pressure by loosening the bolts and tapping the component with a soft hammer to break the seal.
CAUTION Removing the compressor motor press-fit stator in the field is not recommended. The rotor and stator are a matched pair and should not be separated.
When disassembling compressor, matchmark parts so they may be replaced in their same relative positions. (See Figure 6-6.) Refer to Table 6-7 and Table 6-8 for compressor wear limits and bolt torque values.
a. Place the compressor in a position where it will be convenient to drain the oil. Remove the oil fill plug (see Figure 6-6) to vent the crankcase. Loosen the drain plug in bottom plate and allow the oil to drain out slowly. Remove the plug slowly to relieve any crank- case pressure. Some units have a plug in the bottom center of the crankcase which may be removed for draining the motor end more quickly.
1 2 3 4 5 7
6
JACK HERE
1. Cylinder Head Gasket 2. Discharge Valve
Screw & Lockwasher 3. Discharge Valve Stop
4. Discharge Valve 5. Valve Plate 6. Valve Plate Assembly 7. Valve Plate Gasket
Figure 6-7 Exploded View of Valve Plate
1
2
3
4
5
1. Oil Pressure Relief Valve
2. Oil Return Check Valve
3. Oil Suction Tube 4. Capscrew 5. Connecting Rod and
Cap Assembly
Figure 6-8 Bottom Plate Removed b. Loosen cylinder head capscrews. If the cylinder head is stuck, tap the center of the cylinder head with a wooden or lead mallet. Do not strike the side of the cylinder head. Be careful not to drop thehead or dam- age the gasket sealing surface. Remove cylinder head bolts and gasket (see Figure 6-7).
c. Removevalve stops and valves. After they havebeen removed, free the valve plate from the cylinder deck by using theoutsidedischarge valve hold-downcaps- crew as a jack screw through the tapped hole of the valve plate. Remove the valve plate gasket.
d. Turn the compressor on its side and remove the bot- tom plate oil suction screen and screen hold down plate. Inspect the screen for holes or anaccumulation of dirt. The screen can be cleaned with a suitable sol- vent.
e.Matchmark each connecting rod cap (seeFigure 6-8) and connecting rod for correct reassembly. Remove the bolts and connecting rod caps. Push the piston rods up as far as they will go without having thepiston rings extend above the cylinders.
CAUTION The copper tube which connects to the oil suction strainer extends out the bottom with the bottom plate removed. Take pre- cautions to avoid bending or breaking it while changing crankcase positions.
f. If necessary, remove the oil return check valve. (See Figure 6-8.) Inspect it for proper operation (flow in one direction only). Replace the assembly with a new unit if check valve operation is impaired.
g. To remove theoil pump (seeFigure 6-9) removeeight capscrews, oil pump bearing head assembly, gasket and thrust washer.
T-2856-7
2
1
3 45
Set screw must be removed.
1. Oil Pump & Bearing Head
2. Thrust Washer
3. Oil Pickup Tube 4. Oil Inlet Port 5. Oil Pump Inlet
Figure 6-9 Oil Pump and Bearing Head
NOTE If the oil pump was not operating properly, the entire oil pump & bearing head assembly must be replaced. Individual parts are not available. If the pump requires inspection or cleaning, dis- assemble and reassemble by referring to Figure 6-10 . Clean all parts and coat allmoving parts with compressor oil before proceeding with reassembly.
12
1 2 3
4 5 6 7
8 9
10
11
1. Capscrews 2. Cover 3. Reversing Assembly 4. Pinion 5. Gear 6. Drive
7. O-Ring 8. Oil Pump & Bearing 9. Set Screw 10. Relief Valve 11. Pin 12. Gasket
Figure 6-10 Low Profile Oil Pump
h. Be very careful not to damage the motor windings when removing the motor end cover (see Figure 6-11), as the cover fits over the winding coils. Loosen the cap screws, break the seal and then re- moveall capscrews except one in the topof the cover. While holding the cover in place, remove the remain- ing capscrew. Do not allow the cover to drop from its own weight. To prevent striking the winding, remove the cover horizontally and in line with the motor axis.
1
2
3
4 5 6 7
1. Strainer Screws and Washers
2. Suction Strainer 3. Motor End Cover
Gasket
4. Motor End Cover 5. Valve Gasket 6. Suction Service Valve 7. Valve Capscrew
Figure 6-11 Motor End Cover i. Remove the refrigerant suction strainer. If it is removedwith ease it may be cleanedwith solvent and replaced. If the strainer is broken, corroded or clogged with dirt that is not easily removed, replace the strainer. Install new gaskets upon reassembly.
j. Block the compressor crankshaft so that it cannot turn. Use a screwdriver to bend back the tabs on the lockwasher and remove the equalizer tube and lock screw assembly. (See Figure 6-12.) The slingers at the end of the tube draw vapor from the crankcase. Remove the rotor usinga jack bolt. Insert a brass plug into the rotor hole to prevent damage to the end of the crankshaft.
k. If the piston rings extendbeyond thecylinder tops, the pistons can be pulled through the bottom plate open- ing after the piston rings are compressed. A piston ring compresser will facilitate removal. Each piston pin is locked in place by lock rings which are snapped into grooves in the piston wall. See Figure 6-13
l. Since the stator cannot be replaced in the field, the terminal plate assembly need not be disturbedunless a leak exists and the plate assembly needs to be re- placed. If no terminal plate repair is required, proceed with reassembly.
6-8T-285
1
2
3
1. Equalizer Tube and Lock Screw Assembly
2. Lockwasher
3. Counterweight -- Motor End
Figure 6-12 Equalizing Tube and Lock Screw Assembly
1
2
3
4
5 6
7
8 9
10
1. Capscrew 2. Cap 3. Crankshaft 4. Thrust Washer 5. Rotor Drive Key
6. Connecting Rod 7. Compression Ring 8. Piston 9. Pin 10. Retainer
Figure 6-13 Crankshaft Assembly 6.8.3 Compressor Reassembly Clean all compressor parts, use a suitable solvent with proper precautions. Coat all moving parts with the proper compressor oil before assembly. Refer to Table 6-8 for applicable compressor torque values. 6.8.4 Preparation a. Suction and Discharge Valves If the valve seats look damaged or worn, replace valve plate assembly. Always use new valves because it is
difficult to reinstall used valves so that they will seat as before removal. Any valve wear will cause leakage.
1
3
2
1. Suction Valve 2. Suction Valve
Positioning Spring
3. Valve Plate Dowel Pin
Figure 6-14 Suction Valve & Positioning Springs
Suction valves are positioned by dowel pins (see Figure Figure 6-14). Do not omit the suction valve positioning springs. Place the springs so that the ends bear against the cylinder deck (middle bowed away from cylinder deck). Use new gaskets when reinstalling valve plates and cylinder heads.
b. Compression Rings
The compression ring is chamfered on the inside circumference. This ring is installed with the chamfer toward the top. Stagger the ring end gaps so they are not aligned.
Figure 6-15 Piston Ring
The gap between the ends of the piston rings can be checkedwith a feeler gauge by inserting the ring into the piston bore approximately one inch below the top of the bore. Square the ring in the bore by pushing it slightly with a piston. The maximum and minimum allowable ring gaps are 0.33and 0.127mm (0.013and 0.005 inch) respectively.
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6.8.5 Installing the Components
a. Pushpistons from the insideof the crankcase through the cylinders, being careful not to break the rings. Place rods so that the chamfered side will be against radius of crankpins. Install the crankshaft and thrust washer through the pump end of the compressor. En- sure thrust washer is fitted on locating pin. Do not damagemain bearings. Bring rods in position against crank bearings.
b. Install the pump end thrust washer on the two dowel pins located on the bearing head. (See Figure 6-9.)
CAUTION Ensure that thrust washer does not fall off dowel pins while installing oil pump.
CAUTION The set screw on the crankshaft must be removed for this type of oil pump. (See Figure 6-9.)
c. Install the bearing head assembly with a new gasket on the compressor crankshaft. Carefully push oil pump on by hand, ensuring that the thrust washer re- mains on the dowel pins. The tang on the end of the drive engages the slot in the crankshaft, and the oil inlet port on the pump is aligned with the oil pickup tube in the crankcase. The pump should mount flush with the crankcase and should be orientedwith the oil pick up tube and oil inlet port aligned as shown in Figure 6-9.
d. Align the gasket and install the eight capscrews in the mounting flange. Refer to Table 6-8 for applicable torque values.
e. Install matching connecting rod caps Be sure rod is not bound and crankshaft will turn correctly as each set of rod bolts is torqued.
f. Be sure key fits properly when installng rotor on shaft Screw on equalizer tube and lock screw assembly with lock washer and bend over tabs of lock washer. Assemble suction strainer to motor and cover and bolt cover to crankcase. Assemble valve plates and gaskets. Assemble cylinder heads and gaskets. Turn the shaft by hand to see that it moves freely.
g. Install the oil suction screen, the oil suction screen hold down plate and the bottom plate.
6.8.6 Compressor Oil Level
CAUTION Use only Carrier Transicold approved Polyol Ester Oil (POE) -- Castrol-Icematic SW20 compressor oil with R-134a. Buy in quantities of one quart or smaller. When using this hygroscopic oil, immediately reseal. Do not leave container of oil open or contamination will occur.
a. Checking the Oil Level in the Compressor.
1. Operate the unit in cooling mode for at least 20 min- utes.
2. Check the front oil sight glass on the compressor to ensure that no foaming of the oil is present after 20 minutes of operation. If the oil is foamingexcessively after 20 minutes of operation, check the refrigerant system for flood-back of liquid refrigerant. Correct this situation before performing the following step.
3. Turn unit off to check theoil level. The correct oil level range should be between the bottom to one-eighth level of the sight glass. If the level is above one- eighth, oil must be removed from the compressor. To remove oil from the compressor, follow step d in this section. If the level is below the bottom of the sight glass, add oil to the compressor following step b below.
b. Adding Oil with Compressor in System
1. The recommended method is to add oil using an oil pump at the oil fill valve (see item 11, Figure 6-6)
2. In an emergency where an oil pump is not available, oil may be drawn into the compressor through the suction service valve.
Connect the suction connection of the gauge man- ifold to the compressor suction service valve port, and immerse the common connection of the gauge manifold in an open container of refrigeration oil. Extreme care must be taken to ensure the manifold common connection remains immersed in oil at all times. Otherwise air and moisture will be drawn into the compressor. Crack the suction service valve and gauge valve to vent a small amount of refrigerant through the common connection and the oil to purge the lines of air. Close the gauge manifold valve.
With the unit running, frontseat the suction service valve and induce a vacuum in the compressor crank- case. SLOWLY crack the suction gauge manifold valve and oil will flow through the suction service valve into the compressor. Add oil as necessary.
c. Adding Oil to Service Replacement Compressor
Service replacement compressors are shipped without oil. If oil is present in the crankcase, it must be tested to ensure it is the correct oil and that the moisture level is acceptable.
When adding oil to a service replacement compressor add three liters (6.3 pints) using an oil pump at the oil fill valve (see item 11, Figure 6-6). This quantity is recommended to allow for return of any oil thatmay be in the refrigerant system. Install compressor and check oil level after it is placed in operation. Refer to paragraph 6.8.6.
d. Removing Oil from the Compressor
1 If the oil level is above one-eighth sight glass, oil must be removed from the compressor.
2 Close (frontseat) suction service valve and pump unit down to 1.2 to 1.3 kg/cm@ (2 to 4 psig). Frontseat discharge service valve and removeremaining re- frigerant.
3 Loosen the oil drain plug on the bottom plate of the compressor and drain the proper amount of oil from the compressor to obtain the correct level. Backseat the suction and discharge service valves
4 Repeat step a to ensure proper oil level.
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6.9 HIGH PRESSURE SWITCH
6.9.1 Replacing High Pressure Switch
a. Turn unit start-stop switch OFF. Frontseat both suc- tion and discharge service valves to isolate compres- sor. Remove the refrigerant from the compressor.
b. Disconnect wiring from defective switch. The high pressure switch is located on the center head and is removed by turning counterclockwise. (See Figure 2-3.)
c. Install a new high pressure switch after verifying switch settings. (Refer to paragraph 6.9.2.)
d. Evacuate and dehydrate the compressor per para- graph 6.6.
6.9.2 Checking High Pressure Switch
WARNING Do not use a nitrogen cylinder without a pressure regulator. Do not use oxygen in or near a refrigeration system as an explosion may occur.
NOTE The high pressure switch is non-adjustable.
a. Remove switch as outlined in paragraph 6.9.1
b. Connect ohmmeter or continuity light across switch terminals. Ohm meter will indicate no resistance or continuity light will be illuminated if the switch closed after relieving compressor pressure.
c. Connect hose to a cylinder of dry nitrogen. (See Figure 6-16.)
1. Cylinder Valve and Gauge
2. Pressure Regulator 3. Nitrogen Cylinder 4. Pressure Gauge
(0 to 36 kg/cm@ = 0 to 400 psig)
5. Bleed-Off Valve 6. 1/4 inch Connection
1
2
3
4
5
6
Figure 6-16 High Pressure Switch Testing
d. Set nitrogen pressure regulator at 26.4 kg/cm@ (375 psig) with bleed-off valve closed.
e. Close valve on cylinder and open bleed-off valve.
f. Open cylinder valve. Slowly close bleed-off valve to increase pressure on switch. The switch should open at a static pressure up to 25 kg/cm@ (350 psig). If a light is used, light will go out. If an ohmmeter is used, the meter will indicate open circuit.
g. Slowly open bleed-off valve to decrease the pres- sure. The switch should close at 18 kg/cm@ (250 psig).
6.10 CONDENSER COIL
The condenser consists of a series of parallel copper tubes expanded into copper fins. The condenser coil must be cleanedwith freshwater or steamso theair flow is not restricted. To replace the coil, do the following:
WARNING Do not open the condenser fan grille before turning power OFF and disconnecting power plug.
a. Usinga refrigerant reclaim system, remove the refrig- erant charge.
b. Remove the condenser coil guard. c. Unsolder discharge line and remove the line to the receiver or water-cooled condenser.
d. Remove coil mounting hardware and remove the coil. e. Install replacement coil and solder connections. f. Leak-check the coil connections per paragraph para- graph 6.5. Evacuate the unit per paragraph 6.6 then charge the unit with refrigerant per paragraph 6.7.
6.11 CONDENSER FAN AND MOTOR ASSEMBLY
WARNING Do not open condenser fan grille before turning power OFF and disconnecting power plug.
The condenser fan rotates counter-clockwise (viewed from front of unit), pulls air through the the condenser coil, and discharges horizontally through the front of the unit. To replace motor assembly: a. Open condenser fan screen guard. b. Loosen two square head set screws on fan. (Thread sealer has been applied to set screws at installation.) Disconnect wiring from motor junction box.
CAUTION Take necessary steps (place plywood over coil or use sling onmotor) to preventmotor from falling into condenser coil.
c. Remove motor mounting hardware and replace the motor. It is recommended that new locknuts be used when replacing motor. Connect wiring per wiring dia- gram.
d. Install fan loosely on motor shaft (hub side in). DO NOTUSEFORCE. If necessary, tap thehub only, not the hub nuts or bolts. Install venturi. Apply Loctite H to fan set screws. Adjust fanwithin venturi so that the outer edge of the fan projects 3.2 to 6.4 mm (3/16 1/16) back from edge of the venturi. Spin fan by hand to check clearance.
e. Close and secure condenser fan screen guard. f. Apply power to unit and check fan rotation. If fan motor rotates backward, reverse wire numbers 5 and 8.
6.12 WATER COOLED CONDENSER CLEANING
The water-cooled condenser is of the shell and coil type with water circulating through the cupro-nickel coil. The
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refrigerant vapor is admitted to the shell side and is condensed on the outer surface of the coil.
Rust, scale and slime on the water-cooling surfaces inside of the coil interfere with the transfer of heat, reduce system capacity, cause higher head pressures and increase the load on the system.
By checking the leaving water temperature and the actual condensing temperature, it can be determined if the condenser coil is becoming dirty. A larger than normal difference between leaving condensing water temperature and actual condensing temperature, coupled with a small difference in temperature of entering and leaving condensing water, is an indication of a dirty condensing coil.
To find the approximate condensing temperature, with the unit running in the cooling mode, install a gauge 0 to 36.2 kg/cm@ (0 to 500 psig) on the compressor discharge service valve.
Example: Discharge pressure is 10.3 kg/cm@ (146.4 psig). Referring to Table 6-9 (R-134a pressure/ temperature chart), the 10.3 kg/cm@ (146.4 psig) value converts to 43_C (110_F).
If the water-cooled condenser is dirty, it may be cleaned and de-scaled by the following procedure:
a. Turn unit off and disconnect main power.
b. Disconnect water pressure switch tubing by loosen- ing the two flare nuts. Install one-quarter inch flare cap on water-cooled condenser inlet tube (replaces tubing flare nut). De-scale tubing if necessary.
What You Will Need:
1. Oakite composition No. 22, available as a powder in 68 kg (150 lb) and 136 kg (300 lb) containers.
2. Oakite composition No. 32, available as a liquid in cases, each containing 3.785 liters (4 U.S. gallon) bottles and also in carboys of 52.6 kg (116 lbs) net.
3. Fresh clean water.
4. Acid proof pump and containers or bottles with rub- ber hose.
NOTE When Oakite compound No. 32 is being used for the first time, the local Oakite Technical Ser- vice representative should be called in for their suggestions in planning the procedure. They will advise the reader onhow to do theworkwith a minimum dismantling of equipment: how to estimate the time and amount of compound required; how to prepare the solution; how to control and conclude the de-scaling operation by rinsing and neutralizing equipment before putting it back into service. Their knowledge of metals, types of scale, water conditions andde- scaling techniques will be highly useful .
Summary of Procedure:
a. Drain water from condenser tubing circuit. Clean water tubes with Oakite No. 22 to remove mud and slime.
b. Flush.
c. De-scale water tubes with Oakite No. 32 to remove scale.
d. Flush.
e. Neutralize.
f. Flush.
g. Put unit back in service under normal load and check head (discharge) pressure.
Detailed Procedure:
1. Drain and flush the water circuit of the condenser coil. If scale on the tube inner surfaces is accompa- nied by slime, a thorough cleaning is necessary before de-scaling process can be accomplished.
2. To removeslimeormud, useOakite compositionNo. 22. Mixed 170 grams (6 ounces) per 3.785 liters (1 U.S. gallon) of water. Warm this solution and circu- late through the tubes until all slime and mud has been removed.
3. After cleaning, flush tubes thoroughly with fresh clean water.
4. Prepare a 15% by volume solution for de-scaling, by diluting Oakite compound No. 32 with water. This is accomplishedby slowly adding0.47 liter (1 U.S. pint) of the acid (Oakite No. 32) to 2.8 liters (3 U.S. quarts) of water.
WARNING Oakite No. 32 is an acid. Be sure that the acid is slowly added to the water. DO NOT PUT WATER INTO THE ACID -- this will cause spattering and excessive heat.
WARNING Wear rubber gloves and wash the solution from the skin immediately if accidental con- tact occurs. Do not allow the solution to splash onto concrete.
5. Fill the tubes with this solution by filling from the bot- tom. See Figure 6-17. Important: be sure to provide a vent at the top for escaping gas.
Centrifugal pump 30 GPM at 35 head
Pump
Suction
Pump support
Tank
Fine mesh screen
Return
Remove water regulating valve
Condenser
Globe valves
Vent Close vent pipe valve when pump is running.Priming
connection
Figure 6-17 Water-Cooled Condenser Cleaning -- Forced Circulation
6-12T-285
6 Allow the Oakite No. 32 solution to soak in the tube coils for several hours, periodically pump-circulating it with an acid-proof pump. An alternate method may be used whereby a pail (see Figure 6-18) filled with the solution and attached to the coils by a hose can serve the same purpose by filling and draining. The solution must contact the scale at every point for thoroughde-scal- ing. Air pockets in the solution should be avoided by regularly opening the vent to release gas. Keep flames away from the vent gases.
7 The time required for de-scalingwill vary, depending upon the extent of the deposits. One way to deter- mine when de-scaling has been completed is to titrate the solution periodically, using titrating equip- ment provided free by the Oakite Technical Service representative. As scale is being dissolved, titrate readings will indicate that the Oakite No. 32 solution is losing strength. When the reading remains constant for a reasonable time, this is an indication that scale has been dissolved.
8 When de-scaling is complete, drain the solution and flush thoroughly with water.
9 Following the water flush, circulate a 56.7 gram (2 ounce) per 3.785 liter (1 U.S. gallon) solution of Oakite No. 22 thru the tubes to neutralize. Drain this solution.
10 Flush the tubes thoroughly with fresh water.
NOTE If the condenser coolingwater is not beingused as drinking water or is not re-circulated in a closed or tower system, neutralizing is not nec- essary.
11 Put the unit back in service and operate under nor- mal load. Check the headpressure. If normal, a thor- ough de-scaling has been achieved.
What You Can Do For Further Help: Contact the Engineering and Service Department of the OAKITEPRODUCTSCO., 19Rector Street, NewYork, NY 10006 U.S.A. for the name and address of the service representative in your area.
Fill condenser with clean- ing solution. Do not add solution more rapidly than vent can exhaust gases caused by chemical action.
Condenser
Vent pipe
1 Pipe
5 Approximate
3 to 4
Figure 6-18 Water Cooled Condenser Cleaning - Gravity Circulation
6.13 FILTER-DRIER On units equipped with a water-cooled condenser, if the sight glass appears to be flashing or bubbles are constantly moving through the sight glass when the suctionmodulation valve is fully open, theunit may have a low refrigerant charge or the filter-drier could be partially plugged. a. To Check Filter-Drier 1. Test for a restricted or plugged filter-drier by feeling
the liquid line inlet and outlet connections of the drier cartridge. If the outlet side feels cooler than the inlet side, then the filter-drier should be changed.
2. Check the moisture-liquid indicator if the indicator shows a high level of moisture, the filter-drier should be replaced.
b. To Replace Filter-Drier 1. Pump down the unit (refer to paragraph 6.4 and
replace filter-drier. 2. Evacuate the low side in accordance with paragraph
6.6. 3. After unit is in operation, inspect for moisture in sys-
tem and check charge. 6.14 THERMOSTATIC EXPANSION VALVE The thermal expansion valve (see Figure 2-2) is an automatic device which maintains constant superheat of the refrigerant gas leaving the evaporator, regardless of suction pressure. The valve functions are: 1. Automatic control of the refrigerant flow to match the
evaporator load. 2. Prevention of liquid refrigerant entering the com-
pressor. Unless the valve is defective, it seldom requires maintenance other than periodic inspection to ensure that the thermal bulb is tightly secured to the suction line
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and wrapped with insulating compound. (See Figure 6-19.)Onunits fittedwith a semi--hermetic valve, check to be sure the excess capillary is secured to the power head assembly and wrapped with insulating compound.
1
2
3
4
1. Suction Line 2. TXV Bulb Clamp
3. Nut and Bolt 4. TXV Bulb
Figure 6-19 Thermostatic Expansion Valve Bulb
6.14.1 Checking Superheat.
NOTE Proper superheat measurement should be completed at --18_C (0_F) container box tem- perature where possible.
a. Open the heater access panel (see Figure 2-1) to ex- pose the expansion valve .
b. Attach a temperature sensor near the expansion valve bulb and insulate. Make sure the suction line is clean and that firm contact is made with the sensor.
c. Connect an accurate gauge to the service port direct- ly upstream of the suction modulating valve
d. Set the temperature set point to --18_C (0_F), and run unit until conditions stabilize.
e. The readings may cycle from a high to a low reading. Take readings of temperature and pressure every three to five minutes for a total of 5or 6 readings
f. From the temperature/pressure chart (Table 6-9), de- termine the saturation temperature corresponding to the evaporator outlet test pressures at the suction modulation valve.
g. Subtract the saturation temperatures determined in step f. from the temperatures measured in step e.. The difference is the superheat of the suction gas. Determine the average superheat It should be 4.5 to 6.7 C (8 to 12 F)
6.14.2 Hermetic Valve Replacement a. Removing the Expansion Valve
NOTES
1. The TXV is a hermetic valve and does not have adjustable superheat.
2. All connections on the hermetic TXV are bi--metallic, copper on the inside and stainless on the outside.
3. All joints on the hermetic TXV (inlet, outlet and equalizer lines) are brazed.
4. Bi--metallic connections heat up very quickly.
1
6
5
4 3
2
1. Hermetic Thermostatic Expansion Valve 2. Non-adjustable Superheat Stem 3. Equalizer Connection 4. Inlet Connection 5. Outlet Connection 6. Hermetic Expansion Valve Bulb Figure 6-20 Hermetic Thermostatic Expansion
Valve 1. Pump down the unit per paragraph 6.4.
Copper Tube (Apply heat for 10-15 seconds)
Bi-metallic Tube Connection (Apply heat for 2-5 seconds) Use of a wet cloth is not neces-
sary due to rapid heat dissipation of the bi--metallic connections
Braze Rod (Sil-Phos = 5.5% Silver, 6% Phosphorus)
Figure 6-21 Hermetic Thermostatic Expansion Valve Brazing Procedure
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2. Removecushion clamps locatedon the inlet andout- let lines.
3. Unbraze the equalizer connection (1/4), the outlet connection (5/8) and then the inlet connection (3/8). See Figure 6-21. Be careful to protect the in- sulation on the heaters and their wires.
4. Remove insulation (Presstite) from expansion valve bulb.
5. Unstrap the bulb, located below the center of the suction line (4 oclock position), and remove the valve.
b. Installing the Expansion Valve
1. Clean the suction line with sandpaper before instal- ling bulb to ensure proper heat transfer. Apply ther- mal grease to the indentation in the suction line.
2. Strap the thermal bulb to the suction line, making sure bulb is placed firmly into the suction line. See Figure 6-19 for bulb placement.
3. Insulate the thermal bulb.
4. Braze inlet connection to inlet line, see Figure 6-21.
5. Braze outlet connection to outlet line.
6. Reinstall the cushion clamps on inlet and outlet lines.
7. Braze the equalizer connection to the equalizer line.
8. Check superheat (refer to step 6.14.1).
6.14.3 Semi--Hermetic Valve Replacement
a. Removing Expansion Valve
1 Pump down the unit per paragraph 6.4.
2 Remove insulation (Presstite) from expansion valve bulb and power assembly and then remove thermal bulb from the suction line (see Figure 6-19) .
3 Loosen flare nut and disconnect equalizing line from expansion valve.
4 Remove capscrews and lift off power assembly and removecage assembly. Check for foreignmaterial in valve body.
5 The thermal bulb is located below the center of the suction line (4 oclock position). This area must be clean to ensure positive bulb contact.
6
2 5
3
7
1 4
1. Power Assembly 2. Body Flange Gaskets 3. Seat Gasket 4. Bulb 5. Cage Assembly 6. Body Flange 7. Body Flange Screws Figure 6-22. Thermostatic Expansion Valve -- Alco
b. Installing Expansion Valve CAUTION
If the thermostatic expansion valve is found to be in need of replacement, then the power head and cage assembly are to replaced as a pair. They are a matched pair and replacing one without the other will affect the superheat setting.
1 Replace all gaskets, making sure to lightly coat with oil. Insert cage and power assembly and bolts. Tighten bolts equally. Fasten equalizer flare nut to expansion valve.
2 Leak check the unit per paragraph 6.5. Evacuate and dehydrate unit per section 6.6. Add refrigerant charge per section 6.7.
3 Clean suction line with sandpaper before installing bulb to ensure proper heat transfer. Strap thermal bulb to suction line, making sure bulb is placed firmly into the indentation of the suction line. See Figure 6-19 for bulb placement.
4 Check superheat. (Refer to paragraph 6.14.2 step 6.14.1 ) Container box temperature should be at --18C (0F).
6.15 EVAPORATOR COIL AND HEATER ASSEMBLY
The evaporator section, including the coil, should be cleaned regularly. The preferred cleaning fluid is fresh water or steam. Another recommended cleaner is Oakite 202 or similar, following manufacturers instructions. The two drain pan hoses are routed behind the condenser fan motor and compressor. The drain pan line(s) must be open to ensure adequate drainage. 6.15.1 Evaporator Coil Replacement a. Pump unit down. (Refer to paragraph 6.4.)
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b. With power OFF and power plug removed, remove the screws securing the panel covering the evapora- tor section (upper panel).
c. Disconnect the defrost heater wiring.
d. Disconnect the defrost temperature sensor (see Fig- ure Figure 2-2 from the coil. .
e. Remove middle coil support.
f. Remove the mounting hardware from the coil.
g. Unsolder the two coil connections, oneat thedistribu- tor and the other at the coil header.
h. After defective coil is removed from unit, remove defrost heaters and install on replacement coil.
i. Install coil assembly by reversing above steps.
j. Leak check connections per paragraph6.5.Evacuate the unit per paragraph 6.6 and add refrigerant charge per paragraph 6.7.
6.15.2 Evaporator Heater Replacement
a.Before servicing unit, make sure the unit circuit break- ers (CB-1 & CB-2) and the start-stop switch (ST) are in theOFFposition, and that thepower plugandcable are disconnected.
b. Remove the lower access panel (Figure 2-1) by removing the T.I.R. locking device lockwire and mounting screws.
c. Determine which heater(s) need replacing by check- ing resistance on each heater. Refer to paragraph2.3 for heater resistance values
d. Remove hold-down clamp securing heaters to coil.
e. Lift the bent end of the heater (with the opposite end down and away from coil). Move heater to the side enough to clear the heater end support and remove.
6.16 EVAPORATOR FAN AND MOTOR ASSEMBLY
The evaporator fans circulate air throughout the container by pulling air in the top of the unit. The air is forced through the evaporator coil where it is either heated or cooled and then discharged out the bottom of the refrigeration unit into the container. The fan motor bearings are factory lubricated and do not require additional grease.
6.16.1 Replacing The Evaporator Fan Assembly
WARNING
Always turn OFF the unit circuit breakers (CB-1 & CB-2) and disconnect main power supply before working on moving parts.
a. Remove upper access panel (see Figure 2-2) by removing mounting bolts and T.I.R. locking device. Reach inside of unit and remove the Ty-Rap securing the wire harness loop. Then unplug the connector by twisting to unlock and pulling to separate.
b. Loosen four 1/4-20 clampbolts that are locatedon the underside of the fan deck at the sides of the of the fan assembly. Slide the loosened clamps back from the fan assembly.
c. Slide the fan assembly out from the unit and place on a sturdy work surface.
1
2
3
4 5
6
5
7
8
9
1. Stator 2. Flat washer, 1/4 3. Bolt, 1/4-20 x 3/4 4. Locknut, 5/8-18 5. Flat washer, 5/8
6. Impeller Fan 7. Key 8. Mylar Protector 9. Evaporator Motor
Figure 6-23. Evaporator Fan Assembly
6.16.2 Disassemble The Evaporator Fan Assembly a. Attach a spanner wrench to the two 1/4-20 holes located in the fan hub. Loosen the 5/8-18 shaft nut by holding the spanner wrench stationary and turning the 5/8-18 nut counter-clockwise (see Figure 6-23).
b. Remove the spanner wrench. Use a universal wheel puller and remove the fan from the shaft. Remove the washers and key.
c. Remove the four 1/4-20 x 3/4 long bolts that are located under the fan that support the motor and sta- tor housing. Remove the motor and plastic spacer.
6.16.3 Assemble The Evaporator Fan Assembly a. Assemble the motor and plastic spacer onto the sta- tor.
b. Apply loctite to the 1/4-20 x 3/4 long bolts and torque to 0.81 mkg (70 inch-pounds).
c. Place one 5/8 flat washer on the shoulder of the fan motor shaft. Insert the key in the keyway and lubricate the fan motor shaft and threads with a graphite-oil solution (such as Never-seez).
d. Install the fan onto the motor shaft. Place one 5/8 flat washer with a5/8-18 locknut onto themotor shaft and torque to 40 foot-pounds.
e. Install the evaporator fan assembly in reverse order of removal. Torque the four 1/4-20 clampbolts to 0.81 mkg (70 inch-pounds) Apply power momentarily to check for proper fan rotation (refer to paragraph 2.3). If fan spins backward, then motor wiring or motor is defective.
6-16T-285
f. Replace access panel making sure that panel does not leak. Make sure that the T.I.R. locking device is lockwired.
6.17 EVAPORATOR FAN MOTOR CAPACITORS
Units are equippedwith one of 2 types of evaporator fan motors, single, and dual capacitor. The evaporator fan motors are of the permanent-split capacitor type. 6.17.1 When To Check For A Defective Capacitor
a. Fanmotor will not change speed. For example: in the conventional perishablemode, themotors should run in high speed. In the economy perishable mode they should switch speeds and in the frozenmode, themo- tors should run in low speed.
NOTE The evaporator fan motors will always start in high speed.
b. Motor running in wrong direction (after checking for correct wiring application). c. Motor will not start, and IP-EMs are not open. 6.17.2 Removing The Capacitor
WARNING Make sure power to the unit is OFF and power plug disconnected before removing capacitor(s).
The capacitors are located on the motor and may be removed by two methods:
1 If container is empty, open upper rear panel of the unit. The capacitor may be serviced after discon- necting power plug.
2 If container is full, turn the unit power OFF and dis- connect power plug. Remove the evaporator fan motor access panel. (See Figure 2-1). For removal of theevaporator fanassembly, refer to section 6.16.
WARNING With power OFF discharge the capacitor before disconnecting the circuit wiring.
6.17.3 Checking The Capacitor If the capacitor is suspected of malfunction, you may choose to simply replace it. Direct replacement requires a capacitor of the same value. Two methods for checking capacitor function are: 1. Volt-ohmmeter set on RX 10,000 ohms. Connect ohmmeter leads across the capacitor terminals and observe themeter needle. If the capacitor is good, the needle will make a rapid swing toward zero resistance and then gradually swing back toward a very high resistance reading.
If the capacitor has failed open, the ohmmeter needle will not move when the meter probes touch the terminals. If the capacitor is shorted, the needle will swing to zero resistance position and stay there. 2. Capacitor analyzer:
The function of the analyzer is to read the microfarad value of a capacitor and to detect insulation breakdown
under load conditions. The important advantages of a analyzer are its ability to locate capacitors that have failed to hold their microfarad ratings, or those that are breaking down internally during operation. It is also useful in identifying capacitors when their microfarad rating marks have become unreadable.
6.18 SUCTION MODULATION VALVE
On start up of the unit, the valve will reset to a known open position. This is accomplished by assuming the valve was fully open, driving it fully closed, resetting the percentage open to zero, then opening to a known 21% staging position.
2-1/8 inch Nut
1
2
1. Suction Modulation Valve (SMV) 2. Stepper Drive (SD) Figure 6-24 Suction Modulation Valve (SMV)
6.18.1 Precheck Procedure a. Check unit for abnormal operation. b. Check charge. If refrigerant is low repair as required and again check operation.
c. If sufficient capacity cannot be maintained or unit is tripping excessively on high pressure switch (HPS) in high ambients, check coils and clean if required.
d. If capacity or control cannot be maintained turn unit OFF, then back ON. This will reset the valve in the event the controller lost communication with the valve, and may correct the problem.
NOTE Carefully listen to the valve. During reset, the valve will make a ratcheting noise that may be heard or felt as it is attempting to close. If this can be heard or felt, it indicates that the control- ler and drivemodule are attempting to close the valve, and may serve as a quick indication that the drive module is in working order.
e. During the first few minutes of unit operation, com- pressor reliability enhancement logic (CREL) may be in effect. This places the valve at a 21% staging posi- tion and is sufficient to drive the temperature of the supply probe down several degrees during this inter- val.
f. After the CREL time-out has been met, the valve will start responding to the control logic and open or close, relative to the demand. Scrutinize the unit op- eration for a few minutes. While in pulldown the unit will open the SMV to amaximum discharge pressure of 325 psig in high ambient conditions, or as much as the current setting and control logic will allow. The current level should be high. A lower discharge pres-
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sure will be seen in lower ambient temperatures. Once the unit has reached set point, the SMV will go into control mode. Both the discharge/suction pres- sures, and current draw will go significantly lower. Once below set point, the suction pressure should go into a vacuum within several minutes. Should the op- eration differ asmentioned, theSMV,drivemodule, or wiring may be faulty.
g. Check for correct wire location at the drive module (SD) and the environmental connector (EC). Make sure that the wires terminate in accordance with the wire markings (addresses).
h. Attach amanifold gauge set, refer to paragraph 6.3. If the unit is operating in the perishable mode, proceed to step i. I f the unit t is operating in the frozen mode, proceed to step j.
i. Perishable operation: If the operation of the unit is in question, place the set point to approximately 6C (11F) less than the current box temperature, so the unit goes into pulldown. Run the unit for approximate- ly one minute. Record readings on gauges and cur- rent draw. The current draw and pressures should go up. Place set point to 0.5C (0.9F) above current box temperature to fully modulate valve, and run for approximately one minute.
NOTE The unit may shut off for a short time. Wait until the unit self starts and sufficient time has elapsed to cause the valve to fully modulate.
Record new gauge readings and current draw. The suction pressure should go into a vacuum and the current draw should have gone down. If little or no change to the suction pressure or current draw oc- curs, this is an indication of a malfunctioning SMV.
j. Frozen operation: In frozenmode the valvewill tend to stay open as much as possible. Again, this is de- pendent upon current limit setting and control logic. Turn the unit OFF andON, as in the perishablemode, andwatch the gauges. The valvewill run at 21%open if CREL logic is active, and will open to maximum al- lowable after this. Dependent on ambient conditions, there should be an increase in suction pressure and current draw as the valve opens, however, this may be difficult at times to fully determine.
k. If the unit still does not operate properly, stop unit, and proceed to the following step to check out the SMV system.
6.18.2 Checking The Stepper valve
a. Checking with ohmmeter
Disconnect the four pin connector to the stepper SMV. With a reliable digital ohmmeter, check the winding resistance. In normal ambient, the valve should have72 to 84 ohms measured on the red/green (a-b terminals) andon thewhite/black (c-d terminals) leads. If an infinite or zero reading occurs, check connections and replace the motor. If near normal or normal reading occurs, proceed to step 6.18.4 to check out the controller.
b. Checking with SMA-12 portable stepper drive tester
The SMA-12 portable stepper drive tester (Carrier Transicold P/N 07-00375-00) is a battery operated stepper drive which will open and close the SMV, which allows a more thorough check of the motor.
To check operation: 1. Stop the unit, disconnect the four pin connector from
the stepper module to the valve (see Figure 6-24) and attach the SMA-12 stepper drive to the connec- tor going to the valve.
2. Set the SMA-12 pulse per second (PPS) to one PPS and either open or close valve. Each LED should light sequentially until all four are lit. Any LED failing to light indicates an open on that leg which indicates a poor connection or an open coil. Repair or replace as required to achieve proper operation.
3. Restart unit, set the step rate to 200PPS onSMA-12 for the valve, and close stepper valvewhile watching the suction gauge. Within one minute the suction pressure will go into a vacuum. This is an indication that the valve is moving.
4. If no change in suction pressure is detected, check for resistance (refer to step 6.18.2), and check con- nections for proper continuity and retest. If the valve is functioning and all connections and motor resist- ance are good, check the drive module. (Refer to step 6.18.3)
5. If the valve is determined as faulty after completing the above steps, perform a low sidepump down. Re- move valvepowerheadassembly, and replacewith a NEW valvepowerhead assembly, torque nut to 35 ft- lb, evacuate low side, and open all service valves.
CAUTION DONOTdisassemblepiston fromNEWsuc- tion modulating valve powerhead assem- bly. Doing so may result in damage to pis- ton.
6.18.3 Checking The Drive Module a. Turn unit OFF. b. Disconnect the four pin connector to the SMV. c. With voltmeter set to read24 volts AC, attach thepos- itive lead to the drivemodule outlet pin A (wire 1A) of the four pin connector and thenegative lead to the B pin (wire 1B).
d. Turn ON unit, and watch the volt meter. After a short delay, the reading should rise to approximately 12 volts.
e. Repeat for pins C and D (wires 2 A and 2 B). f. If only one set of pins reads a voltage, check connec- tions and retest.
g. If the retest reads out the same, the drive module or controller is faulty.
h. If no voltage is present in any step, theoutput from the controller to the drive module may be faulty, and will require checking the connections and wires from the controller to the drive module. Refer to step 6.18.4
i. To replace the drive module, disconnect all connec- tors, unscrew from mounting, and replace with a NEW drive module in reverse order.
6.18.4 Checking The Controller
a. Turn the unit OFF. b. Disconnect the six pin connector to the stepper drive
from the controller. c. With the voltmeter set to read50 voltsDC, attach the
positive lead to outlet pin A of the six pin connector,
6-18T-285
and the negative lead to pin B or TP-9 of the con- troller.
d. Turn ON the unit for 40 seconds, and watch the volt- meter. There should be approximately 24 to 32 VDC shown on pin A.
e. There should be zero volts on pin B.
f. After a short delay, the reading should rise to approx- imately 24 to 32 VDC on pin E.
g. Pins C and D will have zero to 5 volts transistor logic (TTL) signals present, however, this can only be checked with the connector assembled as this is an open collector type circuit.
By checking the outputs on A, B, and E it can be verified that the controller is supplying power to thedrive module. To be thorough, and if it is desired, the signals on pins C and D can be checked as follows:
1. Install a jumper assembly (Carrier part number 07--00408--00) to connect the drivemodule and con- troller connectors as shown in Figure Figure 6-25.
2. Connect the positive lead of the voltmeter to test connector socket C and negative lead to socket B, and run as before by resetting unit.
3. Repeat for sockets D and B.
A B C D E
A B C D E
Controller Connector (EC)
Drive Module Connector (SD)
Jumper Test
Connector
Figure 6-25 Jumper Assembly
There should be approximately five volts DC on sockets C and D (S1 andS2) whenmeasured as above. If not the connections or controller is faulty.
If any of these pins are not consistent, the connections or controller is suspect. Check and replace as required.
6.18.5 Emergency Repair Procedures:
In the event that the SMV system has a failure and replacement components are not readily available the system canbe by--passedby removing the valve piston. to remove the piston, do the following:
a. Perform a low side pump down. Refer to paragraph 6.4.
b. Remove SMV powerhead by loosening the 2-1/8 inch diameter nut (see Figure 6-24) to relieve any pressure and then , sliding the powerhead out.
c. Remove the piston by loosening the Allen screw and removing the piston and screw.
d. Install the powerhead assembly (without the piston), torque to 35 to 40 foot-lbs.
e. Open all valves.
f. Start the unit.
g. Adjust the suction service valve so that the approxi- mate temperature OR current limit is maintained. For perishable loads, it is recommended that the ad- justment be made so that the available capacity is slightly larger than the load, the unit will cycle OFF and ON.
h. Once repair parts become available, repair as re- quired.
6.19 AUTOTRANSFORMER
If the unit does not start, check the following:
a. Make sure the 460 vac (yellow) power cable is plugged into the receptacle (item 3, Figure 4-1) and locked in place.
b. Make sure that circuit breakers CB-1 and CB-2 are in the ON position. If the circuit breakers donot hold in, check voltage supply.
c. There is no internal protector for this transformer design, therefore, no checking of the internal protec- tor is required.
d. Using a voltmeter, and with the primary supply circuit ON, check the primary (input) voltage (460 vac). Next, check the secondary (output) voltage (230 vac). The transformer is defective if output voltage is not available.
6.20 VENT POSITION SENSOR SERVICE
The fresh air vent position sensor alarm (AL50) will occur if the sensor reading is not stable for 5minutes or if the sensor is outside of its valid range (shorted or open). This can occur if the vent is loose or the panel is defective. To confirm a defective panel, assure that the wing nut is secure and then power cycle the unit.
The alarm should immediately go inactive, check the 4--minute stability requirement. If the alarm reoccurs after the four minutes and the panel was known to have been stable, then the panel should be replaced.
If the alarm immediately reappears as active, the panel should be replaced.
In order to replace the VPS, the panelmust be removed and replaced with another upper fresh air panel equipped with VPS.
Upon installation, a new vent position sensor assembly requires calibration as follows:
1. Rotate the vent to the 0 CMH/ CFM position.
2. Code select 45 will automatically display. Press the Enter key and hold for 5 seconds.
3. After the enter key has been pressed the display will read CAL (for calibration).
4. Press the ALT MODE key and hold for five seconds.
5. After the calibration has been completed, Code 45 will display 0 CMH / CFM.
6.21 CONTROLLER
6.21.1 Handling Controller
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CAUTION Do not remove wire harnesses from con- troller unless you are grounded to the unit frame with a static safe wrist strap.
CAUTION Unplug all controller connectors before performing arc welding on any part of the container.
The guidelines and cautions provided herein should be followed when handling the Controller/DataCORDER module. These precautions and procedures should be implemented when replacing the module, when doing any arc welding on the unit, or when service to the refrigeration unit requires handling and removal of the controller.
1 2 3 4
1. Controller Software Programming Port
2. Mounting Screw 3. Controller 4. Test Points
Figure 6-26 Controller Section of the Control Box
a. Obtain a grounding wrist strap (Carrier Transicold part number 07--00--304--00)and a static dissipation mat (Carrier Transicold part number 07--00304--00. The wrist strap, when properly grounded, will dissi- pate any potential buildup on the body. The dissipa- tion mat will provide a static-free work surface on which to place and/or service the controller.
b. Disconnect and secure power to the unit.
c. Place strap on wrist and attach the ground end to any exposed unpainted metal area on the refrigeration unit frame (bolts, screws, etc.).
d. Carefully remove the Controller. Do not touch any of the electrical connections if possible. Place the mod- ule on the static mat.
e. The strap should be worn during any service work on the controller, even when it is placed on the mat.
6.21.2 Controller Trouble-Shooting
Agroupof test points (TP, seeFigure 6-26) are provided on the controller for trouble-shooting electrical circuits (see schematic diagram, section 7). A description of the test points follows:
NOTE Use a digital voltmeter to measure ac voltage between TPs and ground (TP9), except for TP8.
TP2
This test point enables the user to check if the internal protector for the compressor motor (IP-CP) or high pressure switch is open.
TP3
This test point enables the user to check if the water pressure switch (WP) contact is open or closed.
TP 4
This test point enables the user to check if the internal protector for the condenser fanmotor(IP-CM) is openor closed.
TP 5
This test point enables the user to check if the internal protectors for the evaporator fan motors (IP-EM1 or IP-EM2) are open or closed.
TP 6
This test point enables the user to check if the controller water tank heater relay (TQ) is open or closed
TP 7
This test point is not used in this application.
TP 8
This test point is not applicable to the units covered herein.
TP 9
This test point is the chassis (unit frame) ground connection.
TP 10
This test point enables the user to check if the heat termination thermostat (HTT) contact is open or closed.
6.21.3 Controller Programming Procedure
To load new software into themodule, the programming card is inserted into the programming/software port.
CAUTION The unit must be OFF whenever a program- ming card is inserted or removed from the controller programming port.
CAUTION
All 69NT40-511-3XX units must use software revision 5108 or higher to enable stepper motor. Optional features may
6-20T-285
require higher software revision levels to enable functionality.
NOTE The metal door on the programming card must be facing to the left when inserting.
a. Procedure for loading Operational Software
1. Turn unit OFF, via start-stop switch (ST).
2. Insert the programming card for Operational Soft- ware into the programming/software port. (See Figure 6-26)
3. Turn unit ON, via start-stop switch (ST).
4. The Display module will alternate back and forth between the messages rEV XXXX and Press EntR. (If a defective card is being used the Display will blink the message bAd CArd. Turn start-stop switch OFF and remove the card.)
5. Press the ENTER key on the keypad.
6. The Display will show the message Pro SoFt. This message will last for up to one minute.
7. The Display module will read Pro donE when the software loading has loaded. (If a problem occurs while loading the software: the Display will blink the message Pro FAIL or bad 12V. Turn start-stop switch OFF and remove the card.)
8. Turn unit OFF, via start-stop switch (ST).
9. Remove the programming card from the program- ming/software port and return the unit to normal op- eration by placing the start-stop switch in the ON position.
b. Procedure for loading Configuration Software
1. Turn unit OFF using start-stop switch (ST).
2. Insert the programming card, for Configuration Soft- ware, into the programming/software port. (See Figure 6-26.)
3. Turn unit ON using start-stop switch (ST).
4. The Display module will show 511 on the left LCD display and ### on the right . The ### will be the dash number for a given unit model number, use the UPorDOWNARROWkey to scroll through the list to obtain the proper model dash number. For example, to program amodel number 69NT40-511-100, press the UP or DOWN ARROW key until the display shows 511 on the left display and 100 on the right. (If a defective card is being used, the Display will blink the message bAd CArd. Turn start-stop switch OFF and remove the card.)
5. Press the ENTER key on the keypad.
6. When the software loading has successfully com- pleted, the Display will show the message EEPrM donE. (If a problem occurs while loading the soft- ware, the Display will blink the message Pro FAIL or bad12V. Turn start-stop switchOFFand remove the card.)
7. Turn unit OFF using start-stop switch (ST).
8. Remove the programming card from the program- ming/software port and return the unit to normal op- eration by placing the start-stop switch in the ON position.
6.21.4 Removing and Installing the Controller
a. Removal:
1. Disconnect all front wire harness connectors (MA, MB, MC, KA & KB) and move wiring out of way.
2 The lower controller mounting is slotted, loosen the top mounting screw (see Figure 6-26) and lift up and out.
3 Disconnect the two back connectors (EC) and re- move module.
4 When removing the replacement controller from its packaging , note how it is packaged. When returning theold controller for service, place it in thepackaging in the same manner as the replacement. The pack- aging has been designed to protect the controller from both physical and electrostatic discharge dam- age during storage and transit.
b.Installation:
Install the module by reversing the removal steps.
Torque values for mounting screws (item 2, see Figure 6-26) are 0.23 mkg (20 inch-pounds). Torque value for the connectors (MA,MB, MC, KA&KB) is 0.12 mkg (10 inch-pounds).
6.21.5 Battery Replacement
If required, use tool 07-00418-00.
6.22 TEMPERATURE SENSOR SERVICE
Procedures for service of the Return Recorder, Return Temperature, Supply Recorder, Supply Temperature, Ambient, Defrost Temperature, Compressor Discharge and Compressor Suction temperature sensors are provided in the following sub paragraphs.
6.22.1 Sensor Checkout Procedure
To check a sensor reading, do the following:
a. Remove the sensor andplace in a0_C (32_F) ice-wa- ter bath. The ice-water bath is prepared by filling an insulated container (of sufficient size to completely immerse bulb) with ice cubes or chipped ice, then fill- ing voids between ice with water and agitating until mixture reaches 0_C (32_F) measured on a labora- tory thermometer.
b. Start unit and check sensor reading on the control panel. The reading should be 0_C (32_F). If the read- ing is correct, reinstall sensor; if it is not, continuewith the following.
c. Turn unit OFF and disconnect power supply.
d. Refer to paragraph6.21and removecontroller to gain access to the sensor plugs.
e. Using the plug connector marked EC, that is con- nected to the back of the controller, locate the sensor wires (RRS, RTS, SRS, STS, AMBS, DTS, CPDS ORCPSSas required). Follow thosewires to the con- nector and using the pins of the plug, measure the resistance. Values are provided in Table 6-1.
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Table 6-1 Sensor Temperature/Resistance Chart
Temperature Centigrade
Temperature Fahrenheit
Resistance (Ohms)
RRS, RTS, SRS and STS: 0 32 32,65091 25 77 10,00050
AMBS and DTS
0 32 32,650 + 1720 -- 1620
25 77 10,000 + 450 -- 430
Due to the variations and inaccuracies in ohmmeters, thermometers or other test equipment, a reading within 2% of the chart value would indicate a good sensor. If a sensor is defective, the resistance read- ingwill usually bemuch higher or lower than the resis- tance values given.
6.22.2 Sensor Replacement a. Turn unit power OFF and disconnect power supply. b. For two wire sensors, cut cable 5 cm (2 inches) from shoulder of defective sensor and discard the defec- tive sensor only. For three wire sensors cut at 23 cm (9 inches). Slide the cap and grommet off well mounted sensor and save for possible reuse. Do not cut the grommet.
c. If required, prepare the replacement sensor by cut- ting sensorwire(s) back 40mm (1-1/2 inch). For three wire sensors the black wire should be cut at the middle length and the red/whitewire cut to the shorter length. (See Figure 6-27.)
Sensor 40 mm (1 1/2 inch)
6.3 mm (1/4 inch)
Mounting Stud Type
Sensor
40 mm (1-1/2 inches) 6.3 mm (1/4 inch)
Bulb Type
Figure 6-27 Sensor Types
d. Prepare the cables by cutting wires to the opposite of the sensor. (See Figure 6-28.) When installing a single wire color two wire sensor, cut one wire of existing two wire cable 40 mm (1-1/2 inch) shorter than the other wire. When replacing two single sensors with a combina- tion (three wire) sensor, the black wires of the cables should be cut to the same length and the red wire of one cable cut to the shorter length. When replacing a original three wire sensor, cut the black wire to the middle length and the red wire to the shorter length.
e. Strip back insulation on all wiring 6.3 mm (1/4 inch).
f. Slide a large piece of heat shrink tubing over the cable, and place small pieces of heat shrink tubing, one over each wire, before adding crimp fittings as shown in Figure 6-28.
g. If required, slide the cap and grommet assembly onto the replacement sensor. If the replacement sensor is of a larger diameter than theoriginal, a different grom- met may be required.
h. Slip crimp fittings over dressed wires (keeping wire colors together). Make sure wires are pushed into crimp fittings as far as possible and crimp with crimp- ing tool.
i. Solder spliced wires with a 60% tin and 40% lead Rosincore solder.
j. Slide heat shrink tubing over splice so that ends of tubing cover both ends of crimp as shown in Figure 6-28.
k. Heat tubing to shrink over splice.Make sure all seams are sealed tightly against the wiring to prevent mois- ture seepage.
l. Slide large heat shrink tubing over both splices and shrink.
CAUTION Do not allow moisture to enter wire splice area as this may affect the sensor resis- tance.
m.Reinstall sensor, refer to paragraph 6.22.3.
NOTE The P5 Pre-Trip test must be run to inactivate probe alarms (refer to paragraph 4.8).
6-22T-285
Sensor (Typical)
Cable
Heat Shrink Tubing
Large Heat Shrink Tubing
REPLACEMENT 2 WIRE TO 2 WIRE OR 3 WIRE TO 3 WIRE
REPLACEMENT FOR DUAL SINGLE SENSOR CONFIGURATION
RED BLACK RED/WHITE
Figure 6-28 Sensor and Cable Splice 6.22.3 Sensor Re--Installation a. Sensors STS/SRS Toproperly position a supply sensor, the sensor must be fully inserted into the probe holder. This positioning will give the sensor the optimum amount of exposure to the supply air stream, and will allow the Controller to operate correctly. Insufficient probe insertion into the probe holder will result in poor temperature control due to the lack of air flow over the sensor. It is also necessary to ensure that the probe tip does not contact the evaporator back panel. The design minimum clearance of 6 mm (1/4 inch) should be maintained (see Figure 6-29). b. Sensor RTS/RRS Reinstall the return sensor as shown in Figure 6-30. For proper placement of the return sensor, be sure to position the seal section of the sensor against the the side of the mounting clamp.
c. Sensor DTS The DTS sensor must have insulating material placed completely over the sensor to insure the coil metal temperature is sensed.
Cap and Grommet Assembly
Probe Holder
Supply Sensor
Sensor Wires
Supply Air Stream
Evaporator Back Panel
6 mm (1/4 inch)
Figure 6-29 Supply Sensor Positioning
Evaporator Grille
Combination Sensor (Mount in Either Clamp)
Mounting Clamp
Seal
Figure 6-30 Return Sensor Positioning
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6.23 ELECTRONIC PARTLOW TEMPERATURE RECORDER
The microprocessor based temperature recorder is designed to interface with the DataCORDER to log temperature with time. The electronic recorder will automatically record the return air, supply air, or both, based on the setting of temperature controller configuration code CnF37, refer to Table 3-4. The recorder reads and records data from the Controller in present time, under normal operating conditions.
If using the Electronic Partlow Recorder CTD P/N 12-00464-00:
The recorder will STOPwhen the power is OFF, and the pen tip will remain at the last recorded temperature on the chart. When power is applied, and the power off period is less than three days; the pen tip will move to 25C (77F), the chart will advance to present time, and the pen tip will move to the currently recorded temperature.
If the power has beenOFF formore than three days, the recorder will NOT re--synchronize (the chart will not advance to present time), the pen tip will move to the currently recorded temperature, and the recorder will resume normal temperature recording.
If using the Electronic Partlow Recorder CTD P/N 12-00464-01:
The recorder will STOPwhen the power is OFF, and the pen tip will remain at the last recorded temperature on the chart. When power is applied, and the power off period is less than twodays; the recorderwill retrieve the logged data from the DataCORDER for the power off period and record it onto the chart, thereafter, the recorder will resume normal temperature recording.
If the optionalDataCORDERbattery pack is beingused, and the charge is too low to enable recording during the power off period of less than two days, the pen tip will move to below the inner chart ring for the period when NO data was recorded by the DataCORDER.
If the power has been OFF for more than two days, the recorder will NOT re--synchronize (the chart will not advance to present time), the pen tip will move to the currently recorded temperature, and the recorder will resume normal temperature recording.
If using the Electronic Partlow Recorder CTD P/N 12-00464-02:
The recorder will STOPwhen the power is OFF, and the pen tip will remain at the last recorded temperature on the chart. When power is applied, and the power off period is less than two days; the pen tip willmark a spike to 25C (77F), the recorder will retrieve the loggeddata from the DataCORDER for the power off period and record it onto the chart, thereafter, the recorder will resume normal temperature recording.
If the optionalDataCORDERbattery pack is beingused, and the charge is too low to enable recording during the power off period of less than two days, the pen tip will move to below the inner chart ring for theperiodwhenno data was recorded by the DataCORDER.
If the power has been OFF for more than two days, the recorder will NOT re--synchronize (the chart will not advance to present time), the pen tip will move to the currently recorded temperature, and the recorder will resume normal temperature recording.
6.23.1Replacing the Recorder
a. Turn power to the unit OFF.
b. Open the recorder door (item 1, see Figure 6-31).
c. Locate the connector below the recorder, and squeeze the ears together to disconnect the plug, (item 6).
d. Remove the four mounting screws (item 8), and remove the recorder.
e. Install the new recorder by reversing the above steps.
6.23.2Changing the Chart
a. Lift the stylus (item 5, Figure 6-31) by grasping the arm near the base, and pull the arm away from the chart until it snaps into its retracted position.
b. Remove the chart retaining nut (item 10), remove the used chart, and record todays date on the old chart.
c. Press the Change Chart button (item 2).
NOTE
Failure to press the change chart button, when changing a chart with the power OFF, may result in the chart advancing when power is applied.
d. Install a new chart, make sure the chart center hole is placed over the center hub, and the chart edges are behind the four hold down tabs (item 9).
e. Mark todays date, container number, and other required information on the new chart and install under hold down tabs.
f. Replace the chart nut loosely, rotate the chart until the correct day is aligned with the start arrow, and hand tighten the chart nut.
CAUTION
Do not allow the recorder stylus to snap back down. The stylus arm base is spring loaded, and damagemayoccur to thechart, or the stylus force may be altered.
g. Gently lower the stylus arm until the pen tip (item 4) comes in contact with the chart.
6-24T-285
1 2
3
4
5
6
7
8
9
10
1. Recorder Door 2. Change Chart Button 3. Recorder Box 4. Pen Tip 5. Stylus Arm
6. Connector 7. Calibration Button (Located underneath) 8. Mounting Screws, #10-24 x 7/16 inches long 9. Hold Down Tab 10. Chart Retaining Nut
Figure 6-31. Electronic Partlow Temperature Recorder
6.23.3Adjusting the Recorder Stylus
Proper stylus force upon the chart paper is important. Factory adjustment is 113 to 127 grams (4 to 4.5 ounces). To measure the force, use a spring type gage, and attach it under the stylus as close as possible to the pen tip (item 4). Exert pull on the gage perpendicular to the chart surface. The measured force should be noted just as the pen tip leaves the surface.
NOTE
The two coil springs near the base of the stylus are NOT involved in establishing chart contact force. They serve only to hold the stylus in its retracted position.
Correct adjustment is made by carefully bending the portion of the stylus arm between the bend near the pen tip, and the first bend towards the stylus arm base. If the force is too low, the stylus trace will be light and difficult to read. If the force is too great, wrinkling, or tearing of the paper chart may occur.
6.23.4Rezeroing the Recording Thermometer
For Electronic Partlow Recorder CTD P/N 12-00464-00:
NOTE
Use chart CTD P/N 09-00128-00 (F) P/N 09-00128-01 (C).
a. Press the Calibration button (item 7, Figure 6-31) on the bottom of the recorder. The pen tip will drive fully downscale, thenmoveupscale to the chart ring at --29C (--20F), and stop.
b. If the tip of the pen (item 4) is on the --29C (--20F) chart ring the recorder is in calibration, proceed to step c. If the tip of the pen is NOT on the --29C (--20F) chart ring, the operator must loosen the two screws on the bottom of the stylus arm to adjust the pen tip manually to the --29C (--20F) chart ring. Tighten the screws when adjustment is complete.
c. Press the calibration buttonand thepenwill position itself to the correct temperature reading.
T-2856-25
For Electronic Partlow Recorder CTD P/N 12-00464-01:
NOTE
Use chart CTD P/N 09-00128-00 (F) P/N 09-00128-01 (C).
a. Press the Calibration button (item 7, Figure 6-31) on the bottom of the recorder. The pen tip will drive fully downscale, thenmoveupscale to the chart ring at 0C (32F), and stop.
b. If the tip of thepen (item4) is on the0C (32F) chart ring the recorder is in calibration, proceed to step c. If the tip of the pen is NOT on the 0C (32F) chart ring, theoperatormust loosen the twoscrews on the bottom of the stylus arm to adjust the pen tip manually to the 0C (32F) chart ring. Tighten the screws when adjustment is complete.
c. Press the calibration buttonand thepenwill position itself to the correct temperature reading.
For Electronic Partlow Recorder CTD P/N 12-00464-02:
NOTE
Use only the customer specific chart, contact the unit owner for supplies.
a. Press the Calibration button (item 7, Figure 6-31) on the bottom of the recorder. The pen tip will drive fully downscale, thenmoveupscale to the chart ring at --30C (--22F), and stop.
b. If the tip of the pen (item 4) is on the --30C (--22F) chart ring the recorder is in calibration, proceed to step c. If the tip of the pen is NOT on the --30C (--22F) chart ring, the operator must loosen the two screws on the bottom of the stylus arm to adjust the pen tip manually to the --30C (--22F) chart ring. Tighten the screws when adjustment is complete.
c. Press the calibration buttonand thepenwill position itself to the correct temperature reading.
6.24 MECHANICAL PARTLOW TEMPERATURE RECORDER
CAUTION
The inside mechanism of the recorder, particularly the inside of the element housing should never be oiled, however, control mechanisms should be sprayed periodically (every 60 days) with corrosion inhibiting CRC 3-36a or 6-66 or LPS no. 2.
NOTE
The Controller/DataCORDER air temperature sensor is located adjacent to the temperature recorder bulb, and can be used to calibrate the recorder.
6.24.1 Checking The Temperature Recorder
The temperature recorder may be fitted with a thermistor probe (Simpsonaccessory #344) attachedat the recorder bulb. The thermistor wiring is brought from the bulb location to a receptacle located in the chart platen of the recorder. If a thermistor is provided, the recorder chart reading may be checked using a temperature tester as described in step a . If a thermistor is not fitted, check the recorder chart reading using an ice and water bath as described in step b.
Table 6-2 Temperature-Resistance Chart RESISTANCE TEMPERATURE
(Ohms) F C 12561.00 --10 --23.3 10579.70 --5 --20.6 8944.17 0 --17.8 7588.89 5 --15.0 5520.32 15 --9.4 4731.71 20 --6.7 4068.68 25 --3.9 3509.36 30 --1.1 3310.57 32 0 3035.99 35 1.7 2634.10 40 4.4 2291.85 45 7.2 1999.52 50 10.0 1749.11 55 12.8 1534.00 60 15.6 1348.72 65 18.3 1050.14 75 23.9 929.87 80 26.7 825.21 85 29.4 733.93 90 32.2 654.12 95 35.0 584.19 100 37.8 522.79 105 40.6
a. Check With Temperature Tester
The bulb mounted thermistor may be read using a Simpson Meter, CTC P/N 07-00013 or Robinair Thermistor Temperature Tester, Model 12860 by inserting one end of the lead into the receptacle provided on the temperature recorder chart platen and the other end in the meter. Be sure the temperature tester is properly calibrated before using. If a temperature tester is not available, the thermistor reading may be obtained using an accurate Ohmmeter. To read the thermistor, place one probe of ohmmeter in themiddle of the receptacle provided on the chart platen and ground other probe to unit. Note reading on meter and, using Table 6-2, convert resistance to temperature. b. Check With Ice Bath
Checking of the temperature recorder stylus reading is accomplishedby comparing the stylus readingagainst a known temperature at the sensing bulb. To properly check the temperature indication, the sensing bulb
6-26T-285
should be stabilizedat a temperature of 0C (32F). This is accomplished by using one of the two following methods, whichever is more convenient.
Unit Running:
Place set point at 0C (32F). After unit has pulled down to this temperature, allow the compressor to cycle ON-OFF three to five times to be certain temperature has stabilized at 0C (32F). If the temperature indicated by the recorder differs from 0C (32F) by more than 0.6C (1F) when compressor cycles off, rezeroing must be performed.
Unit Off:
Place the recording thermometer sensing bulb in 0C (32F) ice-water bath. Ice-water bath is prepared by filling an insulated container (of sufficient size to completely immerse bulb) with ice cubes or chipped ice, filling voids between ice with water, and agitating until mixture reaches 0C (32F) as shown by a laboratory thermometer.
When the ice bath temperature reaches 0C (32F), as shownby the laboratory thermometer reading, compare the temperature indicated by stylus with temperature shown by the thermometer. Allow sufficient time to ensure bulb has cooled to the ice bath temperature. If the two readings do not agree within +/-- 0.3C (1/2F), the recording thermometer should be rezeroed.
c. Rezeroing the Temperature Recorder
1 Be certain that the element sensing bulb tempera- ture has stabilized at 0C (32F). Note the amount of temperature difference between the test meter or thermometer reading and the stylus indicated tem- perature.
If the difference noted between the known element temperature and indicated temperature is within acceptable limits (+/-- 0.3 of 0C = 1/2 of 32F), do not attempt to rezero. If more than +/-- 0.3C (1/2F) in variation, carefully note the number of degrees.
2 Loosen set screw (item 6, Figure 6-32) and zero thermometer by turningpinion shaft (item7). Length- ening pinion shaft (counterclockwise) raises stylus indicated temperature reading; shortening shaft
(clockwise) lowers stylus reading. Then retighten set screw.
3 Reset control at 0C (32F), start the refrigeration unit and repeat accuracy check. After temperature stabilization, temperature recorder should be within 0.3C (1/2F) limits.
d. Replacing Temperature Recorder Element (Bulb and Capillary)
The element and bulb are mercury-filled. The element flange contains three O-rings. Care should be taken to install the new element flange without damaging the O-rings. It is possible for a mercury leak to develop at the flange if O-ring damage occurs.
The stylus reading will continue to fall below actual container temperature if a leak develops in the flange, capillary or bulb. To replace the temperature recorder element:
1 Turn unit OFF and disconnect power source. 2 Remove upper back panel. Remove bulb clamps
securing bulb to unit. 3 Remove two flange screws from recording thermom-
eter. If a thermistor is installed, remove the fitting from the recorder platen. Feed capillary andelement through the unit.
CAUTION
Recorder element capillary tubing may be bent, but never sharper than 1/2 radius; extra care should be taken when bending adjacent to welds. The bulb should never be bent, as this will affect calibration.
4 Push replacement bulb and capillary through the unit.
5 Fill slots with silastic (RTV432, Dow Corning). 6 Attach bulb clamps tightly to sensor. 7 Connect element flange to recordermaking sure hub
of flange faces out to fit into the hole in recorder box. Install thermistor fitting if required.
8 Rezero the recorder. (Refer to sections 6.24.a. through 6.24.d.)
9 Install inlet air grille and upper panel. Start unit and check recorder calibration.
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1 2
3
4 5
6
78
9
1011
1. Mechanical Temperature Recorder Bulb
2. Element 3. Recorder Box 4. 31 Day Clock 5. Mechanism and Platen Assembly
6. Set Screw 7. Pinion Shaft 8. Recorder Door 9. Stylus 10. Clock Winding Key 11. Push Rod
Figure 6-32. Partlow Mechanical Temperature Recorder
6.25 SAGINOMIYA TEMPERATURE RECORDER
NOTE
Do not overtighten chart nut after replacing chart.
6.25.1Battery Check
a. Open door and remove chart nut and platen.
b. Push voltage indicator test switch (item 3, Figure 6-33). Replace battery if voltage indicator points to the red or white zone.
6.25.2Calibration
NOTES
1 One full turn with the adjustment screw changes the indicated temperature by approximately 5C (9F).
2 Overtightening of setscrew may change set temperature.
3 Calibration should only be done when sensor temperature is decreasing.
4 DO NOT move stylus by hand.
a. Install new chart on platen.
b. Place the recording thermometer sensing bulb in 0C (32F) ice-water bath. Ice-water bath is prepared by filling an insulated container (of sufficient size to completely immerse bulb) with ice cubes or chipped ice, filling voids between ice with water, and agitating until mixture reaches 0C (32F) as shown by a laboratory thermometer.
c. When the ice bath temperature reaches 0C (32F), as shown by the laboratory thermometer reading, compare the temperature indicated by stylus with temperature shown by the thermometer. Allow sufficient time to ensure bulb has cooled to the ice bath temperature. If the two readings do not agree within +/-- 0.3C (1/2F), the recording thermometer should be rezeroed. Do not touch stylus during the checkout procedure.
d. If adjustment is required, loosen setscrew (cross-recessed head). Using a 7 mm wrench, rotate the adjustment screw clockwise to set the stylus 1 to 2C (1.8 to 3.6F) higher than desired temperature.
e. Rotate the adjustment screw counterclockwise to set the stylus about 0.5C (0.9F) higher than set
6-28T-285
temperature. Rotate the chart by hand. The indicated temperature should be 0C (32F).
6.25.3Replacing Sensor Probe
a. Remove box from unit.
b. Remove nut and bushing (item 18, Figure 6-33).
c. Install replacement probe and bushing. Seal with silicone before securing to case.
d. Install box into unit.
1617 18
1 2
3
4
5
6
7 8
9
10
11
12 13
1415
1. Thermistor Sensor 2. Voltage Indicator 3. Indicator Test Switch 4. Battery (C size, Alkaline) 5. Chart Nut 6. Stylus (Supply) 7. Stylus Lifter (Supply) 8. 31 Day Timer 9. Setscrew (Adjustment)
10. Element (Supply) 11. Return Temperature Sensor Assembly 12. Recorder Box 13. Recorder Door 14. Setscrew (Adjustment) 15. Stylus (Return) 16. Stylus Lifter (Return) 17. Element (Return) 18. Bushing and Nut
Figure 6-33. Saginomiya Temperature Recorder
T-2856-29
6.26 MAINTENANCE OF PAINTED SURFACES
The refrigeration unit is protected by a special paint system against the corrosive atmosphere in which it normally operates. However, should the paint system be damaged, the base metal can corrode. In order to protect the refrigeration unit from the highly corrosive sea atmosphere, or if the protective paint system is scratched or damaged, clean area to baremetal using a wire brush, emery paper or equivalent cleaningmethod. Immediately following cleaning, spray or brush on zinc-rich primer. After the primer has dried, spray or brush on finish coat of paint to match original unit color.
6.27 COMPOSITE CONTROL BOX REPAIRS
6.27.1 Introduction
This procedure provides instructions for repair of the Carrier Transicold composite control box. Damage to the control box may be in the form of a chip or hole, a crack, a damaged thread insert or damage to the door hinge inserts. Generally, the object of the repair must be to ensure sufficient strength is restored to the damaged area and the repair must keep the box water tight. Informationon repair kits and repair procedures foreach type of damage is provided in the following paragraphs. Ambient temperature must be above 7C (45F) for proper curing of epoxy repairs.
6.27.2 Cracks
Cracks in the control box are repaired using a fiberglass patch over the damaged area. Materials required are included in the Fiberglass Patch Kit supplied with Crack Repair Kit, Carrier Transicold part number 76-00724-00SV (see Table 6-3).
a. The surface must be clean and dry. Roughen the sur- face with sandpaper to ensure a good bond.
b. Cut the fiberglass cloth to allow a 25mm (1--inch) overlap around the area to be repaired.
c. Stretch and position the cloth over the area to be re- paired and secure it with masking tape.
d. Make up sufficient epoxy glue to cover the cloth by mixingequal parts of resin andhardener. Saturate the cloth with the epoxy glue, spreading evenly.
e. Remove the tape and overlap the edge of the cloth approximately 6 to 12 mm (1/4 to 1/2) with glue.
f. Epoxy will dry in 45--60 minutes. When completely cured (12 hours), use sandpaper to smooth edges of the patch.
6.27.3 Chips And Holes
Chips and holes in the control box are repaired using a piece of aluminum or stainless steel to cover the damaged area. The material can be cut to suit and riveted in place. An adhesive sealant must be used to make the repair watertight. The adhesive sealant (Sikaflex 221) is included in Crack Repair Kit Carrier Transicold part number 76-00724-00SV (see Table 6-3). Do not use an acetone based silicone sealant (Which can be identified by a vinegar--like odor).
a. To make up the patch, cut a piece of aluminum or stainless steel so that it will overlap thedamagedarea by at least 40 mm (1 1/2) on all sides.
b. Choose rivet locations and drill the rivet holes in the corresponding locations on the control box and patch piece.
c. Apply theadhesive sealant around the damagedarea to form a seal between the control box and the patch piece.
d. Rivet the patch piece in place. e. File smooth any rough edges (including rivets) that may come into contact with wires.
6.27.4 Inserts The threaded brass inserts that are molded into the control box will need to be replaced if the threads become stripped, or if the insert becomes loose. The inserts and epoxy are contained in repair kit, Carrier Transicold part number 76-50084-00 (see Table 6-4). There are 6 different inserts used in the control box. Refer to Figure 6-35 for the locations of the various inserts.
NOTE An epoxy application gun is also needed, Carri- er Transicold part number 07 -- 00391 -- 00.
The damaged insert must be removed from the control box. Table 6-5 identifies thedrill size and drill depth to be used for each insert. A stop ring should be used on the drill bit to limit the depth. a. Center the drill bit on the insert and drill to the pre- scribed depth.
b. Remove the chips from the drilled hole. c. Mix the two component epoxy and fill the hole 1/2way to the top with epoxy.
d. Press the insert in until it is flush with the surface. e. Wipe away any excess epoxy. The part is ready for service after the bond material has hardened and is tack free (approximately 20 minutes)
6.27.5 Door Hinge Inserts If the door hinges have been pulled from the control box drill and reinstall the hinge as shown in Figure 6-34 and described in the following steps.
Figure 6-34 Door Hinge Repair
6-30T-285
Materials needed:
1. Cut two square pieces of 3mm thick (1/8 inch) alumi- num or stainless steel approximately 40 mm (1 5/8) square. These squares will serve as backing plates.
2. Two nuts, bolts (10 -- 24 x 1) and washers for each insert that needs repair.
a. Drill a 1/4 hole in the center of each square backing plate.
b. Pass the bolts through the bolts holes in the door hinge, then through the control box at the location where the hinge insert pulled out.
c. From inside the control box, slide the backing plates over the bolts and secure in place with the washers and nuts.
Table 6-3 Crack, Chip & Hole Repair Kit ITEM DESCRIPTION PART NUMBER Qty
1 Crack Repair Kit -- Includes 76--00724--00SV 1
2 Fiberglass Patch Kit (Loctite FK--98 or 80265). . . 76--00724--00Z 10
3 Sikaflex 221 Adhesive Sealant (Sikaflex 232--361). . . 02--00067--02Z 10
4 Instruction Sheet. . . 98--02339--00 10
Table 6-4 Insert Repair Kit ITEM DESCRIPTION PART NUMBER Qty
1 Insert Repair Kit -- Includes 76--50084--00 1
2 Insert - 17.53 x 9.91 mm (..690 x .390 in) 1/4--20 Threads. . . 34--06231--01 10
3 Insert - 15.88 x 6.35 mm (.625 x .250 in) 10-24 Threads. . . 34--06231--03 10
4 Insert - 25.15 x 7.54 mm (.990 x .297 in) 10-24 Threads. . . 34--06231--04 10
5 Insert - 10.16 x 9.53 mm (.400 x .375 in) 10-24 Threads. . . 34--06231--05 10
6 Insert - 12.7 x 9.91 mm (.5 x .390 in) 1/4--20 Threads. . . 34--06231--06 10
7 Insert - 9.53 x 6.76 mm (.375 x .266 in) 10-24 Threads. . . 34--06231--07 10
8 Durabond Epoxy E20--HP (Loctite 29314). . . 02--0082--00 1
9 Static Mixing Tube (Loctite 983440). . . 07--00390--00 1
10 Instruction Sheet. . . 98--02338--00 1
Note: Insert repair procedures require use of an ApplicationGun, Carrier part number 07--00391--00 (Loctite 983435) Table 6-5 Drill Information
Item Insert part number Drill size and depth 1 34- 06231- 01 10.3 mm x 17.8 mm deep (.404 in. x .700 in. deep) 2 34- 06231- 03 6.8 mm x 16.3 mm deep (.266 in. x .640 in. deep) 3 34- 06231- 04 7.9 mm x 25.4 mm deep (.3125 in. x 1.0 in. deep) 4 34- 06231- 05 6.9 mm (.270 in.) Drill completely through. 5 34- 06231- 06 10.3 mm (.404 in.) Drill completely through. 6 34- 06231- 07 6.8 mm (.266 in.) Drill completely through.
T-2856-31
03
04 04
01 07
05
05
06
IN S E R T PA
R T N U M B E R S 34 --0 62 31 --# # W H E R E T H E ##
IS A S IN D IC A T E D
03
03
03
03
03 07
Figure 6-35. Insert Location
6-32T-285
6.28 COMMUNICATIONS INTERFACE MODULE INSTALLATION
Communications interface ModuleCB1
Figure 6-36. Communications Interface Installation
Units with communication interface module provision have the required wiring installed. The provision wiring kit (part number 76--00685--00), includes three pre--addressed wires installed between the circuit breaker and communication interfacemodule locations. These wires are to be connected to the module and circuit breaker to allow themodule to communicate over the power system. To install the module, do the following:
WARNING THE UNIT POWER PLUG MUST BE DIS- CONNECTED TO REMOVE POWER FROM CIRCUIT BREAKER CB1
a.. CB1 is connected to the power system, see wiring schematic. Ensure that the unit power is off AND that the unit power plug is disconnected.
b.. Open control box, see Figure 6-36 and remove low voltage shield. Open high voltage shield.
c.. Remove the circuit breaker panel, with circuit breaker, from the control box.
d.. Locate, wires CB21/CIA3, CB22/CIA5 and CB23/CIA7 that have been tied back in the wire harness. Remove the protective heat shrink from the ends of the wires.
e.. Attach the three wires as addressed to the LOAD side of the circuit breaker.
f.. Refit the circuit breaker panel.
g. Fit the new RMU into the unit.
h. Remove plugs CIA, CIB and CID from the wiring harness and attach to the module.
.i. Replace the low voltage shield.
Table 6-6 Recommended Bolt Torque Values
BOLT DIA. THREADS TORQUE N.m FREE SPINNING
#4 #6 #8 #10 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4
40 32 32 24 20 18 16 14 13 12 11 10
5.2 in-lbs 9.6 in-lbs 20 in-lbs 23 in-lbs 75 in-lbs 11 ft-lbs 20 ft-lbs 31 ft-lbs 43 ft-lbs 57 ft-lbs 92 ft-lbs 124 ft-lbs
.6 1.0 2.25 2.6 8.4 1.52 2.76 4.28 5.94 7.88 12.72 17.14
NONFREE SPINNING (LOCKNUTS ETC.) 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4
20 18 16 14 13 12 11 10
82.5 in-lbs 145.2 in-lbs 22.0 ft-lbs 34.1 ft-lbs 47.3 ft-lbs 62.7 ft-lbs 101.2 ft-lbs 136.4 ft-lbs
9.3 16.4 30 46 64 85 137 168
T-2856-33
6.29 POWER FACTOR CORRECTOR CAPACITORS (PFC)
The power factor corrector capacitors are of the permanent-split capacitor type. There are a total of three capacitors with discharge resistors enclosed in a single case.
a. When to check for a defective capacitor
The capacitors assist in correcting current draw by the compressor. If one or more of the capacitors is faulty, there will be an imbalance in current. In addition, the power consumption of the unit will increase.
b. Removing the capacitor
WARNING
Make sure power to the unit is OFF and power plug disconnected before removing capacitor(s).
WARNING
Before removing the capacitors the terminals must be checked for voltage with a multimeter. The discharge resistors installed on the unit (capacitors) should bring the voltage to a safe level in aminute. However, there may be a broken resistor that retains voltage for a longer period, it is highly recommended to wait 15 minutes and to check for voltage.
1. The capacitors are located on the unit sidewall above the evaporator fan deck, and may be removed by two methods:
(a.) If container is empty, open upper rear panel of the unit. The capacitors will be on the right and may be serviced after disconnecting power plug.
(b.) If container is full, turn the unit power OFF and disconnect power plug. Remove the upper fresh air makeup vent.
WARNING
With power OFF discharge the capacitor and disconnect the circuit wiring.
c. Checking the capacitor
If the capacitor is suspected of malfunction, you may choose to simply replace it. Direct replacement requires a capacitor of the same value. Two methods for checking capacitor function are:
1. Volt-ohmmeter set on RX 10,000 ohms.
Connect ohmmeter leads across the capacitor terminals and observe themeter needle. If the capacitor is good, the needle will make a rapid swing toward zero resistance and then gradually swing back toward a very high resistance reading. The reading should read about 330,000 ohms (for a good capacitor) due to the discharge resistors.
If the capacitor has failed open, the ohmmeter needle will not move when the meter probes touch the terminals. If the capacitor is shorted, the needle will swing to zero resistance position and stay there.
2. Capacitor analyzer:
The function of the analyzer is to read the microfarad value of a capacitor and to detect insulation breakdown under load conditions. The important advantages of a analyzer are its ability to locate capacitors that have failed to hold their microfarad ratings, or those that are breaking down internally during operation. It is also useful in identifying capacitors when their microfarad rating marks have become unreadable.
6-34T-285
Table 6-7 Wear Limits For Compressors
FACTORY MAXIMUM FACTORY MINIMUM MAXIMUM WEAR PART NAME BEFORE REPAIR
inches mm inches mm inches mm MAIN BEARING Main Bearing Diameter 1.6268 41.3207 .0020 0.0508 Main Bearing Journal Diameter 1.6233 41.2318 .0020 0.0508 PUMP END Main Bearing Diameter 1.3760 34.9504 .0020 0.0508 Main Bearing Journal Diameter 1.3735 34.8869 .0020 0.0508 CONNECTING ROD 1.3768 34.9707 .0020 0.0508 Piston Pin Bearing 0.6878 17.4701 .0010 0.0254 CRANKPIN DIAMETER 1.3735 34.8869 .0025 0.0635 Throw 1.072 27.2288 1.070 27.1780 THRUST WASHER (Thickness) 0.154 3.9116 0.1520 03.8608 .0250 0.6350 CYLINDERS Bore 2.0010 50.8254 .0020 0.0508 Piston (Diameter) 1.9860 50.4444 .0020 0.0508 Piston Pin (Diameter) 0.6873 17.4574 .0010 0.0254 Piston Ring Gap 0.013 00.3302 0.0050 00.1270 .0250 0.6350 Piston Ring Side Clearance 0.002 00.0508 0.0010 00.0254 .0020 0.0508
Table 6-8 Compressor Torque Values
TORQUE RANGE SIZE
USAGE DIAMETER THREADS
ft lb N m (inches) PER INCH
- .
1/16 27 (pipe) 8 -- 12 11 -- 16 Pipe Plug -- Crankshaft 1/8 20 (pipe) 6 -- 10 8 -- 13 Oil Return Check Valve -- Crankcase 1/4 20 (pipe) 20 -- 25 27 -- 34 Pipe Plug -- Gauge Connection 1/4 20 10 -- 12 13 -- 16 Connecting Rod Capscrew
12 -- 15 16 -- 20 Baffle Plate -- Crankcase
1/4 28 12 -- 16 16 -- 22 Side Shield 6 -- 10 8 -- 13 Oil Pump Drive Segment 12 -- 16 16 -- 22 Unloader Valve
Cover Plate -- Plate End
16 -- 20 2 -- 27 Bearing Head
5/16 18 Terminal Block Cap Screws
20 30 27 41 Suction Valve
-- -- Discharge Valve Pump End Bearing Head
3/8 16 40 -- 50 55 -- 70 Bottom Plate -- Crankcase Compressor Foot Cylinder Head
7/16 14 55 -- 60 76 -- 83 Motor End Cover -- Crankcase 5/8 11 25 -- 30 34 -- 41 Crankshaft 5/8 18 60 -- 75 83 -- 103 Oil Bypass Plug -- Crankcase #10 32 4 -- 6 5 -- 8 Oil Pump Drive Segment 1-1/2 18 NEF 35 -- 45 48 -- 62 Oil Level Sight Glass
NEF -- National Extra Fine
T-2856-35
Table 6-9 R-134a Temperature - Pressure Chart
Temperature Vacuum
_F _C /hg cm/hg kg/cm@ bar
--40 --40 14.6 49.4 37.08 0.49
.35 .37 12.3 41.6 31.25 0.42
--30 --34 9.7 32.8 24.64 0.33
--25 --32 6.7 22.7 17.00 0.23
--20 --29 3.5 11.9 8.89 0.12
--18 --28 2.1 7.1 5.33 0.07
--16 --27 0.6 2.0 1.52 0.02
Temperature Pressure
_F _C psig kPa kg/cm@ bar
--14 --26 0.4 1.1 0.03 0.03
--12 --24 1.2 8.3 0.08 0.08
--10 --23 2.0 13.8 0.14 0.14
--8 --22 2.9 20.0 0.20 0.20
--6 --21 3.7 25.5 0.26 0.26
--4 --20 4.6 31.7 0.32 0.32
--2 --19 5.6 36.6 0.39 0.39
0 --18 6.5 44.8 0.46 0.45
2 --17 7.6 52.4 0.53 0.52
4 --16 8.6 59.3 0.60 0.59
6 --14 9.7 66.9 0.68 0.67
8 --13 10.8 74.5 0.76 0.74
10 --12 12.0 82.7 0.84 0.83
12 --11 13.2 91.0 0.93 0.91
14 --10 14.5 100.0 1.02 1.00
16 --9 15.8 108.9 1.11 1.09
18 --8 17.1 117.9 1.20 1.18
20 --7 18.5 127.6 1.30 1.28
22 --6 19.9 137.2 1.40 1.37
24 --4 21.4 147.6 1.50 1.48
26 --3 22.9 157.9 1.61 1.58
Temperature Pressure
_F _C psig kPa kg/cm@ bar
28 --2 24.5 168.9 1.72 1.69
30 --1 26.1 180.0 1.84 1.80
32 0 27.8 191.7 1.95 1.92
34 1 29.6 204.1 2.08 2.04
36 2 31.3 215.8 2.20 2.16
38 3 33.2 228.9 2.33 2.29
40 4 35.1 242.0 2.47 2.42
45 7 40.1 276.5 2.82 2.76
50 10 45.5 313.7 3.20 3.14
55 13 51.2 353.0 3.60 3.53
60 16 57.4 395.8 4.04 3.96
65 18 64.1 441.0 4.51 4.42
70 21 71.1 490.2 5.00 4.90
75 24 78.7 542.6 5.53 5.43
80 27 86.7 597.8 6.10 5.98
85 29 95.3 657.1 6.70 6.57
90 32 104.3 719.1 7.33 7.19
95 35 114.0 786.0 8.01 7.86
100 38 124.2 856.4 8.73 8.56
105 41 135.0 930.8 9.49 9.31
110 43 146.4 1009 10.29 10.09
115 46 158.4 1092 11.14 10.92
120 49 171.2 1180 12.04 11.80
125 52 184.6 1273 12.98 12.73
130 54 198.7 1370 13.97 13.70
135 57 213.6 1473 15.02 14.73
140 60 229.2 1580 16.11 15.80
145 63 245.6 1693 17.27 16.93
150 66 262.9 1813 18.48 18.13
155 68 281.1 1938 19.76 19.37
6-36T-285
80
100
120
140
160
180
200
220
240
260
280
300
320
60 70 80 90 100 110 120
psig
(43.3)(37.8)(32.2)(26.7)(21.1)(15.6)
_F (_C)
(Bar)
(5.5)
(6.9)
(8.3)
(9.7)
(11.0)
(12.4)
(13.8)
(15.2)
(16.6)
(19.3)
(20.7)
(22.0)
35_F (1.7_C) Box
(17.9)
Note: Curves to be used as troubleshooting guide only for model series 69NT40 with fresh air makeup vent closed, unit powered on 460 VAC/60hz and SMV 100% open.
Compressor Discharge Pressure Versus Ambient Air Temperature at Stable Box Temperature
80
100
120
140
160
180
200
220
240
260
280
300
320
60 70 80 90 100 110 120
Ambient Air Temperature
psig
(48.9)(43.3)(37.8)(32.2)(26.7)(21.1)(15.6)
(Bar)
0_F (--17.8_C) Box
(5.5)
(6.9)
(8.3)
(9.7)
(11.0)
(12.4)
(13.8)
(15.2)
(16.6)
(19.3)
(20.7)
(22.0)
(17.9)
Ambient Air Temperature
_F (_C)
Figure 6-37 R-134a Compressor Pressure and Motor Current Curves Versus Ambient Temperature (Sheet 1 of 2)
T-2856-37
--6
--4
--2
0
2
4
6
8
10
12
14
60 70 80 90 100 110 120
Ambient Air Temperature
psig
_F
(Bar)
(.97)
(.83)
(.69)
(.55)
(.41)
(.28)
(.14)
(0)
(--.14)
(--.28)
(--.41)
0_F (--17.8_C) Box
(48.9)(43.3)(37.8)(32.2)(26.7)(21.1)(15.6) (_C)
35_F (1.7_C) Box
Compressor Suction Pressure Versus Ambient Air Temperature at Stable Box Temperature
8
9
10
11
12
13
14
15
16
17
60 70 80 90 100 110 120
Ambient Air Temperature
Compressor-Motor Current Versus Ambient Air Temperature At Stable Box Temperature
35_F (1.7_C) Box
0_F (--17.8_C) Box
_F
(48.9)(43.3)(37.8)(32.2)(26.7)(21.1)(15.6) (_C)
Figure 6-37 R-134a Compressor Pressure and Motor Current Curves Versus Ambient Temperature (Sheet 2 of 2)
7-1 T-285
SECTION 7
ELECTRICAL WIRING SCHEMATIC
7.1 INTRODUCTION
This section contains the Electrical Schematics and Wiring Diagrams. The diagrams are presented as follows: Figure 7-1 Provides the legend for use with all figures. Figure 7-2 Provides the schematic diagram for units with normal evaporator fan operation. Figure 7-3 Provides the schematic diagram for units with single evaporator fan capability. The basic difference be-
tween this schematic and the normal schematic canbe found in the control section for the fan contactors and in the high voltage section for the motors. The single evaporator fan units will maintain one fan online if the other fan internal protector opens.
Figure 7-4 Supplements the other schematic diagrams and provides schematics for the Vent Position Sensor (VPS), TransFRESH, NatureFRESH and chart recorders.
Figure 7-5 Provides the wiring diagram for units with normal evaporator fan operation and dual capacitor evaporator fan motors.
Figure 7-6Provides thewiring diagram for unitswith single evaporator fan capability anddual capacitor evaporator fan motors.
Figure 7--7 Provides thewiring diagram for unitswith normal evaporator fanoperation and single capacitor evaporator fan motors.
Figure 7--8 Provides the wiring diagram for units with single evaporator fan capability and single capacitor evaporator fan motors.
Figure 7-9 Supplements the other wiring diagrams and presents wiring for the Partlow electronic temperature recorder
Sequence of operation descriptions for the various modes of operation are provided in paragraph 4.10
7-2T-285
SYMBOL DESCRIPTION (Schematic Location) AMBS AMBIENT SENSOR (E--19) BM BYPASS MODULE (D--20) CB1 CIRCUIT BREAKER -- 460 VOLT (J--1) CB2 CIRCUIT BREAKER -- AUTO TRANSFORMER (D--1) CCH CRANKCASE HEATER (T--2)
CF CONDENSER FAN CONTACTOR (M--10, P--6) CFS CONDENSER FAN SWITCH (L--10) CH COMPRESSOR CONTACTOR (G--6, P--1) CI COMMUNICATIONS INTERFACE MODULE (A--3) CL COOL LIGHT (H--6)
CM CONDENSER FAN MOTOR (T--6) CP COMPRESSOR MOTOR (T--1) CPT CONDENSER PRESSURE TRANSDUCER (H--20) CPDS COMPRESSOR DISCHARGE SENSOR (C--19) CPSS COMPRESSOR SUCTION SENSOR (E--19)
CR CHART RECORDER [TEMPERATURE RECORDER] (Figure 7-4)
CS CURRENT SENSOR (M--2) DHBL DEFROST HEATER -- BOTTOM LEFT (T--5) DHBR DEFROST HEATER -- BOTTOM RIGHT (T--5)
DHH DRAIN HOSE HEATER (L--14) DHML DEFROST HEATER -- MIDDLE LEFT (T--5) DHMR DEFROST HEATER -- MIDDLE RIGHT (R--5) DHTL DEFROST HEATER -- TOP LEFT (T--5)
DHTR DEFROST HEATER -- TOP RIGHT (R--5) DL DEFROST LIGHT (M--13) DPH DRAIN PAN HEATER (R--5) DPT DISCHARGE PRESSURE TRANSDUCER (L--20) DTS DEFROST TEMPERATURE SENSOR (D--19)
DVM DUAL VOLTAGE MODULE (E--1) DVR DUAL VOLTAGE RECEPTACLE (F--2) E1 EVAPORATOR FAN CONTACTOR #1 [HIGH]
(P--8, H--11, J--11) E2 EVAPORATOR FAN CONTACTOR #2 [HIGH]
(J--11, K--11, P--10) EB EMERGENCY BYPASS SWITCH (L--8) ED EMERGENCY DEFROST SWITCH (E--5, E--12, E--13) EDL EMERGENCY DEFROST LIGHT (L--12) EF EVAPORATOR FAN CONTACTOR [HIGH]
(M--11, P--8, P--9, P--10) EM EVAPORATOR FAN MOTOR (T--8, T--10) ES EVAPORATOR FAN CONTACTOR [LOW]
(M--12, R--8, R--10) F FUSE (D--5)
FCR FUSE -- CHART RECORDER (Figure 7-4) FDH FUSE -- DRAIN LINE HEATER (E--14) FED FUSE -- EMERGENCY DEFROST (E--5) FH FUSE -- HUMIDITY (Figure 7-4)
FT FUSE -- TransFRESH (Figure 7-4) HA HUMIDITY ATOMIZER (Figure 7-4) HHT HOSE HEATER THERMOSTAT (J--14) HM HOUR METER (H--6) HPR HUMIDITY POWER RELAY (Figure 7-4)
HPS HIGH PRESSURE SWITCH (J--7) HPT HUMIDITY POWER TRANSFORMER (Figure 7-4) HR HEATER CONTACTOR (M--13, P--3)
LEGEND
SYMBOL DESCRIPTION (Schematic Location) HS HUMIDITY SENSOR (G--20) HST HOSE HEATER SAFETY THERMOSTAT (G--14) HTT HEAT TERMINATION THERMOSTAT (F--12) HWH HUMIDITY WATER HEATER (Figure 7-4) HWP HUMIDITY WATER PUMP (Figure 7-4)
IC INTERROGATOR CONNECTOR [FRONT/REAR] (T--19, T--20)
IP INTERNAL PROTECTOR (F--7, H--10) IRL IN RANGE LIGHT (M--15) MDS MANUAL DEFROST SWITCH (H--15)
PDR PUMP DIRECTION RELAY (Figure 7-4) PE PRIMARY EARTH (J--2) PR PROBE RECEPTACLE [USDA]
(F--19, M--20, N--20, P--20) RM REMOTE MONITORING RECEPTACLE
(H--6, L--13, L--15) RRS RETURN RECORDER SENSOR (D--19 or M17) RTS RETURN TEMPERATURE SENSOR (D--19) S1 EVAPORATOR FAN CONTACTOR #1 [LOW]
(G--11, J--11, R--8)
S2 EVAPORATOR FAN CONTACTOR #2 [LOW] (J--11, K--11, R--10,)
SD STEPPER MOTOR DRIVE (C--20) SMV SUCTION MODULATING VALVE (A--20)
SPT SUCTION PRESSURE TRANSDUCER (K--20) SRS SUPPLY RECORDER SENSOR (L--20) ST START -- STOP SWITCH (L--4) STS SUPPLY TEMPERATURE SENSOR (C--20) TBU TRANSFORMER BRIDGING UNIT
TC CONTROLLER RELAY -- COOLING (K--7) TCC TransFRESH COMMUNICATIONS
CONNECTOR (Figure 7-4) TD CONTROLLER RELAY -- WATER
PUMP/ATOMIZER (Figure 7-4)
TE CONTROLLER RELAY -- HIGH SPEED EVAPORATOR FANS (FIG 7--2 = K--11, FIG 7--3 = G--11)
TF CONTROLLER RELAY -- DEFROST (D--14) TFC TransFRESH CONTROLLER (Figure 7-4)
TH CONTROLLER RELAY -- HEATING (K--13) TI CONTROLLER RELAY -- IN RANGE (K--5) OR
WATER PUMP REVERSE (Figure 7-4) TN CONTROLLER RELAY -- CONDENSER FAN (K--10) TP TEST POINT (E--15, E--17, G--10, J--10, K--7, K--13,
M--15, FIG 7--4 & FIG 7--2 = K--11, FIG 7--3 = F--11) TQ CONTROLLER RELAY -- WATER TANK HEATER
(Figure 7-4) TR TRANSFORMER (M--3)
TRANS AUTO TRANSFORMER 230/460 (D--3) TRC TransFRESH REAR CONNECTOR (Figure 7-4) TS CONTROLLER RELAY -- NOT USED (D--15) TV CONTROLLER RELAY -- LOW SPEED EVAPORATOR
FANS (FIG 7--2 = K--12, FIG 7--3 = G--12)
VPS VENT POSITION SENSOR WH WATER HEATER RELAY (Figure 7-4) WHTT WATER HEATER TERMINATION THERMOSTAT
(Figure 7-4) WP WATER PRESSURE SWITCH (F--10)
Figure 7-1 LEGEND
7-3 T-285
RRS (SINGLE SENSOR ONLY)
RRS (COMBINATION SENSOR ONLY)
6 Heater
5 Heater
(or VPS See fig 7--4)
Figure 7-2 SCHEMATIC DIAGRAM - Normal Evaporator Fan Operation
7-4T-285
RRS (COMBINATION SENSOR ONLY)
RRS (SINGLE SENSOR ONLY)
5 Heater
6 Heater
Figure 7-3 SCHEMATIC DIAGRAM - Single Evaporator Fan Capability
7-5 T-285
TO DL, TERMINAL C SEE SEE FIGURE
7--2 or 7--3
TransFRESH CONTROLLER
TC, SEE FIGURE 7--2 or 7--3
CB1 SEE FIGURE 7--2 or 7--3
NatureFresh HUMIDITY MANAGEMENT SYSTEM
ST SEE FIGURE 7--2 or 7--3
SAGINOMIYA TEMPERATURE RECORDER (Chart Recorder)
CR
F C R
NOTE: STANDARD CONTROLLER JUMPERS: MA3 TO MA7 AND MA9 TO MA11 (SEE Figure 7-2 SHEET 1) ARE REMOVED IN THIS APPLICATION
ELECTRONIC PARTLOW TEMPERATURE RECORDER (Chart Recorder)
TR SEE FIGURE 7--2 or 7--3
ST SEE FIGURE 7--2 or 7--3
TR SEE FIGURE 7--2 or 7--3
ST SEE FIGURE 7--2 or 7--3
TR SEE FIGURE 7--2 or 7--3
ST SEE FIGURE 7--2 or 7--3
TR SEE FIGURE 7--2 or 7--3
VENT POSITION SENSOR
Note: DPT may not be installed if unit is equipped with VPS
Figure 7-4 SCHEMATIC DIAGRAM -- TransFRESH, Vent Position Sensor (VPS), Humidity and Recorders
7-6T-285
(ICF MAY BE IN CONTROL BOX)
NOTE: WHEN EB, ED, BM OR CFS IS/ARE INSTALLED, WIRE DESTINATIONS CHANGE FROM THE STANDARD. ADDRESSES FOR THE CHANGED DESTINATIONS ARE SHOWN IN BRACKETS [XXX].
K A 6
[C F S 1]
CR (SEE Figure 7-9)
TRC1TRC2
KB7 [DF11]
WIRES TO TR X2 EDL, DF--(TFC), P--(TFC), CIB1, GRD, CHA2, RMA, KA12, EFA2, HRA2, CR8, HPRB, HRA2,HPT5 & DHH
HM
C H A 1
H R A 2
H M
H M
11
12
31
32
C C H
C C H
C F L1
C F L3
C H 31
ECD3 [ED5] ECE3 [ED8]
HTT SINGLE SENSOR CONFIGURATION
COMBINATION SENSOR
T11 T4 T3 T2 T1 P2 P1
J G F E D C B A
T11 T4 T3 T2 T1 P2 P1
J G F E D C B A
E F T 3
E F 32
E S T 3
E S T 2
E M 18
E C J2
E F T 2
E F T 2
E S T 1
E F T 1
E M 2A
E S T 2
E F 12
E C J1
6 Heaters
4 Heaters
C H 11
Figure 7-5 WIRING DIAGRAM -- Normal Evaporator Fan Operation , Units with Dual Capacitor Evaporator Fan Motors (Sheet 1 of 2)
7-7 T-285
HTT [ED6] HTT [ED9]
SDDC [BMDC]
SDS1 [BMS1]
SDON [BMON] SDGD [BMGD]
SDS2 [BMS2]
ST7 [ED3]
CFA1 [CFS2]
K B 7
[E D 11 ]
Q C 1
[E D 2]
CFS
KA6
CFA1
RMC [ED12]
NOTE: WHEN EB, ED, BM OR CFS IS/ARE INSTALLED, WIRE DESTINATIONS CHANGE FROM THE STANDARD. ADDRESSES FOR THE CHANGED DESTINATIONS ARE SHOWN IN BRACKETS [XXX].
(UNITS WITHOUT ED ONLY)
DF+
FOR UNITS WITHOUT ELECTRONIC CR ONLY, FOR CR WIRING, SEE FIGURE 7--7
HPRB
HPRA
PDRA
NOTE: RM MAY BE OUTSIDE BOX
KB7 [ED11]
Q C 1
F D H
H S T
RRS SINGLE SENSOR ONLY
(COMBINATION SENSOR ONLY)
RRS
Figure 7-5 WIRING DIAGRAM -- Normal Evaporator Fan Operation (Sheet 2 of 2) , Units with Dual Capacitor Evaporator Fan Motors
7-8T-285
E2A2
(ICF MAY BE IN CONTROL BOX)
ECD3 [ED5] ECE3 [ED8]
HTT
NOTE: WHEN EB, ED, BM OR CFS IS/ARE INSTALLED, WIRE DESTINATIONS CHANGE FROM THE STANDARD. ADDRESSES FOR THE CHANGED DESTINATIONS ARE SHOWN IN BRACKETS [XXX].
CR (SEE Figure 7-9)
TRC1TRC2
KB7 [DF11]
WIRES TO TR X2 EDL, DF--(TFC), P--(TFC), CIB1, GRD, CHA2, RMA, KA12, EM1B, EM2B, HRA2 DHH & CR8
HM
C H A 1
H R A 2
H M
H M
E 1L 1
S 1L 2
S 1L 3
EM2A
E2A2 EM2A
H R L1
S 1T 4
S 1L 1
E 2L 2
K A 4
E 2L 4
E1
S 1A
1
M C 6
(W H T )
S 1A
2
S1 K A 5
S 1T 1
S 2L 2
H R L2
C F L1
E 1L 1
E 1T 4
E M 1A
E 1A
2 E 1A
1
E M 1G
E M 1F
E M 1E
S 1L 3
C M T 4
C M T 1
E M 2A
S 2A
2
S 2A
1
E M 2D
E M 2C
E 2A
2 K B 10
E 2A
1
E M 2E
S 2L 1
E M 2F
E M 2G
S 2L 4
K A 6
E 1L 4
C F L3
S 2L 3
S 2L 2
E 1L 1
S 2T 4
S 1L 4
E 2L 3
H R L3
E 2L 2
S 1L 2
S 2T 3
E 2T 4
S2E2CF
E 2L 3
S 1L 1
H R A 2
KA2
C IG
11
12
31
32
C C H
C C H
C F L1
C F L3
C H 11
C H 31
SINGLE SENSOR CONFIGURATION
COMBINATION SENSOR
6 HEATERS 4 HEATERS
T11 T4 T3 T2 T1 P2 P1
J G F E D C B A
T11 T4 T3 T2 T1 P2 P1
J G F E D C B A
E 2T 3
S 2T 1
S 2T 3
S 2T 2
E 2A
2
T R X 2
E 2T 2
E 1T 2
S 1T 1
E 1T 1
T R X 2
S 1T 2
S 1T 3
S 1A
2
Figure 7-6 WIRING DIAGRAM -- Single Evaporator Fan Capacity , Units with Dual Capacitor Evaporator Fan Motors (Sheet 1 of 2)
7-9 T-285
HTT [ED6] HTT [ED9]
SDDC [BMDC]
SDS1 [BMS1]
SDON [BMON] SDGD [BMGD]
ST7 [ED3]
CFA1 [CFS2]
K B 7
[E D 11 ]
Q C 1
[E D 2]
CFS
KA6
CFA1
RMC [ED12]
NOTE: WHEN EB, ED, BM OR CFS IS/ARE INSTALLED, WIRE DESTINATIONS CHANGE FROM THE STANDARD. ADDRESSES FOR THE CHANGED DESTINATIONS ARE SHOWN IN BRACKETS [XXX].
(UNITS WITHOUT ED ONLY)
DF+
NOTE: RM MAY BE OUTSIDE BOX
KB7 [ED11]
CIG
E1A2 (WHT)
S1L4
E1F4
S2A2
Q C 1
F D H
H S T
FOR UNITS WITHOUT ELECTRONIC CR ONLY, FOR CR WIRING, SEE FIGURE 7--7
(COMBINATION SENSOR ONLY)
RRS
SDS2 [BMS2]
RRS SINGLE SENSOR ONLY
DPTB DPTC
Figure 7-6 WIRING DIAGRAM -- Single Evaporator Fan Capacity , Units with Dual Capacitor Evaporator Fan Motors (Sheet 2 of 2)
7-10T-285
(ICF MAY BE IN CONTROL BOX)
NOTE: WHEN EB, ED, BM OR CFS IS/ARE INSTALLED, WIRE DESTINATIONS CHANGE FROM THE STANDARD. ADDRESSES FOR THE CHANGED DESTINATIONS ARE SHOWN IN BRACKETS [XXX].
CR (SEE Figure 7-9)
TRC1TRC2
KB7 [DF11]
WIRES TO TR X2 EDL, DF--(TFC), P--(TFC), CIB1, GRD, CHA2, RMA, KA12, EFA2, HRA2, CR8, HPRB, HRA2,HPT5 & DHH
HM
C H A 1
H R A 2
H M
H M
11
12
31
32
C C H
C C H
C F L1
C F L3
ECD3 [ED5] ECE3 [ED8]
HTTSINGLE SENSOR CONFIGURATION
COMBINATION SENSOR
Figure 7-7 WIRING DIAGRAM -- Normal Evaporator Fan Operation , Units with Single Capacitor Evaporator Fan Motors (Sheet 1 of 2)
7-11 T-285
HTT [ED6] HTT [ED9]
SDDC [BMDC]
SDS1 [BMS1]
SDON [BMON] SDGD [BMGD]
SDS2 [BMS2]
ST7 [ED3]
CFA1 [CFS2]
K B 7
[E D 11 ]
Q C 1
[E D 2]
CFS
KA6
CFA1
RMC [ED12]
NOTE: WHEN EB, ED, BM , VPS OR CFS IS/ARE INSTALLED, WIRE DESTINATIONS CHANGE FROM THE STANDARD. ADDRESSES FOR THE CHANGED DESTINATIONS ARE SHOWN IN BRACKETS [XXX].
(UNITS WITHOUT ED ONLY)
DF+
FOR UNITS WITHOUT ELECTRONIC CR ONLY, FOR CR WIRING, SEE FIGURE 7--7
HPRB
HPRA
PDRA
NOTE: RM MAY BE OUTSIDE BOX
KB7 [ED11]
Q C 1
F D H
H S T
RRS SINGLE SENSOR ONLY
(COMBINATION SENSOR ONLY)
RRS
[VPS1] [VPS2]
[VPS3]
DPTB
DPTC
Figure 7-5 WIRING DIAGRAM -- Normal Evaporator Fan Operation , Units with Single Capacitor Evaporator Fan Motors (Sheet 2 of 2)
7-12T-285
E2A2
(ICF MAY BE IN CONTROL BOX)
ECD3 [ED5] ECE3 [ED8]
HTT
NOTE: WHEN EB, ED, BM OR CFS IS/ARE INSTALLED, WIRE DESTINATIONS CHANGE FROM THE STANDARD. ADDRESSES FOR THE CHANGED DESTINATIONS ARE SHOWN IN BRACKETS [XXX].
CR (SEE Figure 7-9)
TRC1TRC2
KB7 [DF11]
WIRES TO TR X2 EDL, DF--(TFC), P--(TFC), CIB1, GRD, CHA2, RMA, KA12, EM1B, EM2B, HRA2 DHH & CR8
HM
C H A 1
H R A 2
H M
H M
E 1L 1
S 1L 2
S 1L 3
EM2A
E2A2 EM2A
H R L1
S 1T 4
S 1L 1
E 2L 2
K A 4
E 2L 4
E1
S 1A
1
M C 6
(W H T )
S 1A
2
KA2
11
12
31
32
C C H
C C H
C F L1
C F L3
SINGLE SENSOR CONFIGURATION
COMBINATION SENSOR
6 Heaters
Figure 7-8 WIRING DIAGRAM -- Single Evaporator Fan Capacity , Units with Single Capacitor Evaporator Fan Motors (Sheet 1 of 2)
7-13 T-285
HTT [ED6] HTT [ED9]
SDDC [BMDC]
SDS1 [BMS1]
SDON [BMON] SDGD [BMGD]
ST7 [ED3]
CFA1 [CFS2]
K B 7
[E D 11 ]
Q C 1
[E D 2]
CFS
KA6
CFA1
RMC [ED12]
NOTE: WHEN EB, ED, BM OR CFS IS/ARE INSTALLED, WIRE DESTINATIONS CHANGE FROM THE STANDARD. ADDRESSES FOR THE CHANGED DESTINATIONS ARE SHOWN IN BRACKETS [XXX].
(UNITS WITHOUT ED ONLY)
DF+
NOTE: RM MAY BE OUTSIDE BOX
KB7 [ED11]
CIG
E1A2 (WHT)
S1L4
E1F4
S2A2
Q C 1
F D H
H S T
FOR UNITS WITHOUT ELECTRONIC CR ONLY, FOR CR WIRING, SEE FIGURE 7--7
(COMBINATION SENSOR ONLY)
RRS
SDS2 [BMS2]
RRS SINGLE SENSOR ONLY
Figure 7-6 WIRING DIAGRAM -- Single Evaporator Fan Capacity, Units with Single Capacitor Evaporator Fan Motors (Sheet 2 of 2)
7-14T-285
FROM TRX1 SEE Figure 7-6 SHEET 1
NOTE: STANDARD CONTROLLER JUMPERS: MA3 TO MA7 AND MA9 TO MA11 (SEE Figure 7-2 SHEET 1) ARE REMOVED IN THIS APPLICATION
Figure 7-9 WIRING DIAGRAM -- Electronic Partlow Temperature Recorder
Index-1 T-285
INDEX
A Air Cooled Condenser Section, 2-4
Alarm, 3-6, 3-10, 3-11, 3-17, 3-26
Arctic Mode, 3-4
Autotransformer, 6-18
B Bulb Mode, 3-5
C Capacitors, 6-16
Checking Superheat, 6-13
Communications Interface Module, 3-10, 3-11, 6-32
Composite Control Box, 6-29
Compressor, 6-5
Compressor Section, 2-3
Condenser Coil, 6-10
Condenser Pressure Control, 3-4
Configuration Software, 3-3, 3-8
Configuration Variables, 3-12
Controller, 3-3, 6-18
Controller Software, 3-3
Crankcase Heater, 4-4
D DataCORDER, 3-7, 3-10, 4-3
DataCORDER Software, 3-7
DataReader, 3-10
Defrost Interval, 3-4
Defrost Mode, 4-7
Display Module, 3-2
Drive Module, 6-17
E Emergency Bypass, 4-9
Emergency Defrost, 4-9
Evacuation, 6-3
Evaporator, 6-14
Evaporator Fan, 1-3, 3-4, 6-15
Evaporator Section, 2-2
Expansion Valve, 6-12
F Failure Action, 3-4
Filter--Drier, 6-12
Fresh Air Makeup, 2-1, 4-1
Frozen Mode, 4-7
Frozen Mode -- Conventional, 3-6
Frozen Mode -- Economy, 3-6
Function Code, 3-13, 3-24
G General Description, 2-1
Generator Protection, 3-4
H Heat Lockout, 3-4
Heater, 6-14
Heating Mode, 4-7
High Pressure Switch, 6-10
I Inspection, 4-1, 4-3
Introduction, 1-1
K Key Pad, 3-2
L Leak Checking, 6-3
Logging Interval, 3-10
Index-2 T-285
INDEX (continued)
M Manifold Gauge Set, 6-1
Microporcessor System, 3-1
Modes Of Operation, 3-3
Motor Current, 6-36
O Oil Level , 6-9
Operational Software, 3-3, 3-7
P Painted Surfaces, 6-29
Perishable Mode, 4-6
Perishable Mode -- Conventional, 3-4
Perishable Mode -- Dehumidification, 3-5
Perishable Mode -- Economy, 3-5
Power, 4-1
Pre--Trip, 3-7, 3-10, 3-20, 3-25, 4-3
Probe Check, 4-5
Pumping Down, 6-2
R Refrigerant Charge, 6-4
Refrigeration Circuit, 2-10
Refrigeration System Data, 2-7
Refrigeration Unit -- Front Section, 2-1
S Safety and Protective Devices, 2-9
Sampling Type, 3-10
Sensor Configuration, 3-8
Sequence Of operation, 4-6
Service Valves, 6-1
Starting, 4-3
Stopping, 4-3
Suction Modulating Valve, 6-16
T Temperature Control, 3-4, 3-6
Temperature Recorder, 4-3, 6-23, 6-25, 6-27
Temperature Sensor, 6-20
Thermistor Format, 3-10
Torque Values, 6-32, 6-34
U USDA, 3-11
V Vent Postion Sensor, 6-18
W Water Cooled Condenser, 6-10
Water--Cooled Condenser Section, 2-5
Wear Limits, 6-34
Wiring Schematic, 7-1
Carrier Transicold Division, Carrier Corporation P.O. Box 4805 Syracuse, N.Y
Related manuals for Carrier 69NT40-511-300 to 399 Container Operation Manual EN
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