ARB 60L - 6 TROUBLESHOOTING; 6.1 Check (diagnosis) lights

Revision Date – 22/12/2014 page 11
6 TROUBLESHOOTING
6.1 Check (diagnosis) lights
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 customer’s
requirements.
 Check the vehicle wiring is adequate.
- For cable lengths up to 6m (20’), ARB recommends a minimum automotive cable size of 6 mm
(4.5 mm
2
).
- 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).
To ensure that voltage drop is accounted for when measuring this voltage, refer to section 8.1.
NOTE: The battery protecting system 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 0.5 amp while
the compressor is running. This could be because the fan is running slowly or not running at all.
Things to check
 Check that 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 equalise.
 Reconnect the fridge freezer to the power supply and turn it on.
 Check that the fridge freezer is operating correctly.
4 x 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.
5 x 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 the direct sunlight. Try to improve the ventilation around
the fridge freezer or shield it from direct sunlight.