What to do if Thermo King V-500 MAX-20 3PH Control Unit is not cooling?
If your Thermo King Control Unit isn't cooling even when the box temperature exceeds the setpoint, first check the voltage on Pin 6 of C-9. If the issue persists, consider replacing the Cab Control Box.
How to troubleshoot a blank display on Thermo King V-500 MAX-20 3PH?
If the Thermo King Control Unit display is blank when you press the On/Off switch: 1. First, verify the voltage on Pin 3 of C-9 (or Pin 2 if the unit is in electric mode). 2. Second, check Fuse 4/1, located inside the Cab Control Box. 3. If the display remains blank, replace the Cab Control Box.
Why is the Thermo King V-500 MAX-20 3PH Control Unit Operation LED off when cooling?
If the Unit Operation LED is OFF while your Thermo King Control Unit is cooling, begin by checking the voltage on Pin 7 of C-9. If the LED remains off, the next step is to replace the Cab Control Box.
General| Brand | Thermo King |
|---|---|
| Model | V-500 MAX-20 3PH |
| Category | Control Unit |
| Language | English |
Safety measures for handling refrigerants to prevent injury or damage.
Immediate actions for exposure to refrigerants or oils.
Warnings and procedures for electrical safety to prevent shock.
Precautions for servicing electronic control components to prevent damage.
Critical safety information for working with high voltage circuits.
Details on fuses, motors, voltage, and current ratings.
Parameters for R-134a and R-404A refrigerant systems.
List of unit capabilities and safety protection mechanisms.
How the thermostat and defrost cycles function.
Step-by-step instructions for using the in-cab control box.
Guidance on unit startup, inspections, loading, and post-load tasks.
Inspection schedule for the refrigeration and heating systems.
Diagnosing issues with the M-13 and M-16 control boxes.
Detailed explanation and testing procedures for the defrost cycle.
Procedure for adding refrigerant to the system.
Procedures for installing compressors, including handling and storage.
Procedures for checking, draining, and replacing compressor oil.
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