What to do if my Thermo King V-200 is not cooling?
If your Thermo King Refrigerator isn't cooling even when the box temperature exceeds the setpoint, first check the voltage on Pin 6 C-9. If the issue persists, consider replacing the Cab Control Box.
What to do if the Unit Operation LED is off on my Thermo King V-200 Refrigerator?
If the Unit Operation LED is OFF while your Thermo King Refrigerator is cooling, first check the voltage on Pin 7 C-9. If the LED remains off, replace the Cab Control Box.
General| Model | V-200 Series |
|---|---|
| Power Source | electric standby |
| Refrigerant | R-452A |
| Voltage | 12V or 24V DC |
| Compressor Type | Reciprocating |
| Dimensions | Varies by model |
Guidelines for safe operation and handling of refrigeration equipment.
Precautions and first aid for handling refrigerants safely.
Guidelines for safe handling and first aid for refrigeration oil.
Warnings and precautions for working with high voltage electrical systems.
Precautions for handling low voltage circuits and preventing burns.
Covers compressor, oil, and defrost method details for all models.
Details refrigerant charge and pressure switch settings for R-134a units.
Details refrigerant charge and pressure switch settings for R-404A units.
Lists fuse ratings, fan motor specs, and solenoid coil resistances.
Overview of system models, applications, and basic components.
Describes the mounting and design of the condenser assembly.
Details the mounting location of the evaporator inside the truck box.
Explains compressor mounting, drive systems, and protection features.
Explains control system operation, in-cab box functions, and model differences.
Describes the role of the oil separator in returning oil to the compressor.
Identifies refrigerants used (R-134a, R-404A) and their system applications.
Details the function of the liquid injection system in managing compressor discharge temperature.
Explains the purpose of heaters in preventing drain tube blockage from ice.
Describes how the thermostat controls unit operation during electric standby mode.
Lists key components and features of the V-200/V-300 series units.
Details safety switches like HPCO, CFPS, and LPCO and their functions.
Identifies P.C. boards by part number and notes layout variations.
Explains connector codes and pin numbering on the P.C. board.
Lists fuses, their locations, and circuits they protect.
Introduces the in-cab control box and its various models (M-13, M-16, M-17).
Identifies and describes keys, LEDs, and indicators on the M-13/M-16/M-17 control boxes.
Details how to adjust and display setpoint temperatures using the dial and key.
Explains the function of various LEDs (Power Cord, AC Overload, Unit Operation, Defrost) and keys.
How to view the current box temperature on the display.
How to view the target setpoint temperature on the display.
Step-by-step guide to setting the desired temperature using dial and key.
Instructions for initiating manual or automatic defrost and stopping the cycle.
A list of items to inspect weekly before loading the truck.
Procedures for starting the unit using truck engine power or electric standby.
Steps to verify unit operation and pre-cool the box after starting.
Best practices for loading products to ensure proper air circulation and temperature.
Actions to take after loading, including setting temperature and initiating defrost.
Routine checks to perform after a trip, such as washing and leak inspection.
Guide to diagnosing common issues with the M-13/M-16 control box using block diagrams.
Guide to diagnosing common issues with the M-17 control box for TC units.
Explains how defrost cycles are initiated and controlled by the timer and switches.
Details how to adjust the defrost timer intervals using selector switches.
Describes how to manually initiate a defrost cycle.
Explains the switch's role in controlling defrost cycle duration based on coil temperature.
Details the defrost relay's function in energizing solenoid valves and controlling fans.
Explains how the solenoid valve routes hot gas for defrost.
Provides steps to test the defrost system's components and identify faults.
Steps to test the defrost timer's functionality and settings.
Explains the CFPS function and pressure thresholds for R-134a units.
Procedures for testing the CFPS using a multimeter and gauges.
Details the function of the liquid injection system in managing compressor discharge temperature.
Steps to test the liquid injection valve and metering orifice for proper operation.
Guides for diagnosing issues with electric standby mode, checking voltage, fuses, and components.
Detailed steps for evacuating and charging the system with refrigerant.
Methods for verifying the refrigerant level using sight glass and pressure readings.
Procedures to check refrigerant charge with an empty or loaded box.
Procedures for ensuring proper oil level in the compressor, especially after refrigerant loss.
Explains the HPCO switch function, location, and test procedure.
Details the LPCO switch function, location, and test procedure.
Procedures for flushing the system to remove contaminants and oil.
Steps for reassembling, pressurizing, leak testing, and charging the system.
Step-by-step instructions for removing and installing the compressor, including oiling.
Procedures for removing and installing the condenser coil.
Steps for removing and installing the drier.
Instructions for removing and installing high pressure and fan pressure switches.
Procedures for removing and installing solenoid valves.
Procedures for removing and installing the liquid injection metering orifice.
Steps for removing and installing the oil separator.
Detailed testing procedure for the liquid injection system.
Procedure to test the discharge check valve's functionality.
Steps for disassembling, inspecting, and reassembling check valves.
Procedures for removing and installing the evaporator coil.
Instructions for removing and installing the expansion valve assembly.
Procedures for removing and installing the low pressure cutout switch.
Steps for removing and installing the suction receiver tank.
Procedures for removing and installing the suction pressure regulator valve.
Instructions for removing and installing in-line check valves.
Step-by-step guide for removing and replacing refrigerant hoses using the speedy clip system.
Guidelines for inspecting the unit for damage, leaks, and loose components.
Instructions for cleaning the evaporator coil to maintain airflow.
Instructions for cleaning the condenser coil to maintain airflow.
Guidance on periodically checking and torquing unit mounting bolts.
How to test the clutch for proper engagement, amperage, and air gap.
Detailed steps for removing the clutch assembly.
Guidelines for inspecting the drive plate, pulley assembly, and coil for wear or damage.
Instructions for installing the coil, pulley assembly, and driver plate with torque specifications.
How to check and adjust clutch clearance using shims.
Procedures for removing, inspecting, and installing shaft seal components.
Detailed steps for installing the new shaft seal and cover using guides and installers.
Lists and illustrates specialized tools required for clutch maintenance.
Proper mounting angles and oil requirements for compressor installation.
How and when to add oil to the system, specifying oil type.
Procedures for checking oil level after significant refrigerant loss.
Steps to drain oil from the compressor for inspection or replacement.
Procedures for adjusting and checking belt tension for engine and standby compressors.
Identifies causes for lack of cooling, excessive heat load, dirt, belt tension, and refrigerant issues.
Discusses faulty expansion valve adjustment, excessive oil, moisture, and air in the system.
How to interpret liquid line temperature and filter drier condition for diagnosis.
Factors that shorten compressor lifespan, such as contamination and improper lubrication.
Lists possible causes and remedies for the compressor failing to run in electric standby.
Identifies causes and remedies for the unit cycling on and off too frequently.
Addresses issues causing the unit to run excessively or continuously.
Diagnoses causes for the box temperature being higher than setpoint.
Identifies causes for high head pressure in the system.
Addresses causes for low head pressure in the system.
Identifies causes for unusual noise from the unit.
Explains reasons for oil loss from the compressor.
Diagnoses issues causing frost or sweat on the suction line.
Addresses problems related to the liquid line temperature and frosting.
Focuses on diagnosing vacuum conditions, specifically frost expansion valve issues.
Checks for power, rotor lock, bearings, and capacitors related to compressor operation.
Procedures to verify transformer output and rectifier output.
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