Zero ARB Service Manual

Revision Date – 15/07/2020 page 17
TROUBLESHOOTING
Cooling (continued)
Symptom
Possible Cause(s)
Suggested Action(s)
Fridge cools but
compressor runs
continuously.
Poor ventilation.
Check that there is sufficient clearance
around the fridge and that the fan is not
obstructed.
Fridge is operating at or near
the thermal capacity of
system.
The thermal capacity of the system is
50°C (122°F) below ambient temperature.
The lid seal is damaged or
missing.
Check that the seal is installed correctly
into the lid and that it is in good condition.
Replace the seal if it is damaged or
missing.
Faulty thermistor.
Test thermistor (refer to section 8.4) and
replace if necessary (refer section 9.10).
Faulty control panel circuit
board.
Test fridge with new control panel circuit
board and replace if necessary (refer to
section 9.4).
Faulty main circuit board.
Test fridge with new main circuit board
and replace if necessary (refer to section
9.6)
Insufficient charge of
refrigerant in compressor
system.
Contact a qualified refrigeration mechanic
and request that the system is pressure
tested.
Partial blockage within the
refrigeration system.
Contact a qualified refrigeration mechanic
for service advice.
Noisy compressor
Compressor is loose or not
correctly mounted.
Inspect the compressor to ensure that it is
correctly mounted. Replace compressor
mounting feet if necessary.
Noise from inside compressor
when fridge experiences high
movement and/or vibration.
This noise is normal when the fridge
experiences high movement and/or
vibration.
System is low on refrigerant.
Perform checks listed above under
“Fridge does not cool. Compressor Runs”.
Digital display shows
temperature values in the
wrong units.
The internal settings within
the control panel are
incorrect.
Refer to the owner’s manual for directions
on changing temperature units between
°C and °F.

Zero ARB Specifications

General

Brand	Zero
Model	ARB
Category	Freezer
Language	English