Zero ARB Service Manual

Revision Date – 15/07/2020 page 16
TROUBLESHOOTING
Cooling (continued)
Symptom
Possible Cause(s)
Suggested Action(s)
Temperature display is not
accurate with cabinet
temperature.
Time lag has not been
allowed for.
Allow the fridge to reach the set
temperature and cycle a few times before
assessing accuracy of temperature.
NOTE: A display temperature within 2-
3°C (3.6-5.4°F) of the actual
temperature at the base of the
fridge is within normal on/off
cycle temperature variation.
Frozen items have been
placed directly on top of
thermistor.
Rearrange items in fridge so that frozen
items are not located directly on top of the
thermistor.
NOTE: The thermistor is located in the
base of the fridge directly under
the centre of the plastic liner.
Internal temperature
correlation settings
inaccurate.
Adjust the internal temperature correlation
setting (refer to section 8.5).
NOTE: This should not be necessary
unless the thermistor has been
replaced.
Items freeze with fridge set
to warmest setting.
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).
Fridge does not reach
target temperature.
Fridge is operating at its
maximum cooling capacity in
extreme ambient
temperatures.
The maximum cooling capability of the
system is a reduction of 50°C (122°F)
below ambient temperature.
For example
In ambient temperatures above 32°C
(73°F), the system may not cool to a
cabinet temperature of -18°C (0°F).
Large temperature
difference between the top
and bottom of fridge.
The temperature within the
cabinet will vary as the
compressor cycles on and off.
The temperature difference
will vary depending on factors
like how the fridge is loaded
and how often it is opened.
Advise the customer that some
temperature variation is normal within the
fridge.
NOTE: The temperature difference can
increase as the cabinet
temperature decreases.

Zero ARB Specifications

General

Brand	Zero
Model	ARB
Category	Freezer
Language	English