45-1579 | Genuine Thermo King® Thermoguard TG V TG5

1. Maintain Cargo Temperature

Monitors return-air (and optional discharge-air) temperature.

Keeps the refrigerated compartment at a set temperature range (e.g., –31°C to +29°C).

2. Control Compressor and Refrigeration Cycles

Starts and stops the compressor based on temperature setpoints.

Optimizes operation to prevent overcooling or unnecessary running.

3. Manage Defrost Cycles

Automatically initiates defrost based on time intervals or system needs.

Ensures the evaporator stays frost-free for efficient cooling.

4. Improve Fuel Efficiency

Features a fuel saver mode that delays high-speed operation when possible, reducing fuel consumption during transport.

5. Alert Operators to Faults

Detects and displays alarms for:

Sensor failures

Defrost errors

Microprocessor issues

Helps prevent cargo damage due to system malfunctions.

6. Provide User Interface

LCD display and keypad allow operators to:

Set temperatures

View system status

Monitor alarms and operating conditions

1. Display or Keypad Issues

• LCD screen doesn’t turn on

• Display shows garbled or flickering characters

• Buttons/keypad don’t respond

2. Temperature Control Problems

• Refrigerated compartment is too warm or too cold

• Temperature fluctuates unexpectedly

• Setpoints are ignored or cannot be set

3. Compressor Malfunction

• Compressor doesn’t start when it should

• Compressor runs continuously or stops randomly

• Erratic cycling of the refrigeration system

4. Defrost Failures

• Defrost cycles don’t start automatically

• Defrost runs too long or too short

• Ice buildup occurs on the evaporator

5. Alarm Malfunctions

• False alarms appear without reason

• Fault conditions are not displayed

• Sensor failure or system errors are not indicated

6. Fuel Saver or Performance Issues

• Fuel saver mode doesn’t function, causing excessive fuel consumption

• High-speed mode fails to engage when needed

7. Electrical or Communication Errors

• Controller fails to communicate with sensors or other modules

• Error codes appear frequently (sensor fault, microprocessor error)

8. Physical Damage

• Cracked casing, water intrusion, burnt smell, or overheating signs