Zero ARB Service Manual

Revision Date – 15/07/2020 page 11
TROUBLESHOOTING
DC Power Supply (continued)
Symptom
Possible Cause(s)
Suggested Action(s)
Fridge does not run when
using a 12/24V DC power
supply.
Faulty compressor control
unit.
Test compressor control unit (refer to
section 8.3). If compressor does not run
during test, replace compressor control
unit (refer to section 9.5) and repeat test.
Faulty control panel circuit
board.
Test compressor control unit (refer to
section 8.3). If control unit is ok, test fridge
with new control panel circuit board and
replace if necessary (refer to section 9.4).
Faulty main circuit board.
Test compressor control unit (refer to
section 8.3). If control unit is ok, test fridge
with new main circuit board and replace if
necessary (refer to section 9.6).
Faulty thermistor.
Test compressor control unit (refer to
section 8.3). If control unit is ok, test fridge
with new thermistor and replace if
necessary (refer to section 9.10).
Fault within main wiring loom.
Test continuity of wiring loom from main
circuit board to control panel circuit board.
If fault identified and unrepairable, contact
ARB for advice.
Fridge will not run when DC
input voltage exceeds 13.8V
(eg When vehicle is
running)
Faulty main circuit board.
Replace main circuit board (refer to section
9.6) and retest.

Zero ARB Specifications

General

Brand	Zero
Model	ARB
Category	Freezer
Language	English