Classic I and II Fridge Check Lights (Diagnosis Error Codes)

1 x Flash every 5 seconds - BATTERY PROTECTION CUT-OUT

The battery protection system has turned the fridge/freezer off because low voltage has been detected.

Things to check:

• Check that the correct battery protection setting has been selected to suit the requirements of the installation. 
• Check that the vehicle wiring is adequate.
  • For cable lengths up to 6m (20'), ARB recommends a minimum automotive cable size of 6mm (4.5mm²).
  • For cable lengths greater than 6m (20'), ARB recommends that you consult a qualified technician for advice on the correct wire size.
• Check that all terminals and joints are clean and in good condition.
• Check that the battery voltage at the socket is above the set cut-out voltage (refer to section 6.6 of the Classic service manual, or this article within our knowledge base.)
• To ensure that voltage drop is accounted for when measuring this voltage, refer to section 8.1 of the Classic service manual.

NOTE: The battery protection setting only controls 12 and 24v DC supplies. To confirm that the fridge/freezer is operating correctly, connect the fridge/freezer to a standard 100-240v AC supply.

2 x Flashes every 5 seconds - FAN OVER-CURRENT CUT-OUT

The control system has turned the fridge/freezer off because the fan is drawing more than 0.5amp while the compressor is running. This could be because the fan is running slowly or not running at all.

Things to check:

• Check to ensure the fan is not obstructed or dirty.

3 x Flashes every 5 seconds - MOTOR START ERROR

The compressor will not start because the refrigerant system has become unbalanced. This can occur when the power to the fridge/freezer is briefly interrupted.

Things to check:

• Turn the fridge/freezer off and disconnect it from its power supply.
• Allow the fridge/freezer to stand for 10 to 15 minutes to allow the system to equalize.
• Reconnect the fridge/freezer to the power supply and turn it on.
• Check that the fridge/freezer is operating correctly.

4x Flashes every 5 seconds - MINIMUM MOTOR SPEED ERROR

The compressor motor is running below its minimum maintainable speed. This could be because the refrigerant system has been overcharged.

Consult a refrigeration mechanic to check that the system is charged with the correct amount of refrigerant.

5x Flashes every 5 seconds - THERMAL CUT-OUT OF ELECTRONIC UNIT

The fridge/freezer has stopped operating because the control unit has become too hot.

Things to check:

• Check to ensure that there is adequate ventilation around the control unit and the compressor.
• Check that the fan is operating correctly. The fan must always be running when the compressor is running.
• The fridge/freezer may be operating in extremely high ambient temperatures. For example, in a sealed stationary vehicle that is parked in direct sunlight. Try to improve the ventilation around the fridge/freezer or shield it from direct sunlight.