Revision Date – 15/07/2020
page 12
TROUBLESHOOTING
DC Power Supply (continued)
Symptom
Possible Cause(s)
Suggested Action(s)
12/24V DC fridge lead plug
fuse blows repeatedly.
Fault within 12/24V DC fridge
power lead.
Check continuity of lead from plug to
socket. Replace lead if faulty or damaged.
Incorrect fuse used in plug.
Install the correctly rated fuse. The correct
rating is 10Amp (refer section
Short circuit between “+” and
“-” terminals on compressor
control unit.
Check for short circuits between the “+”
and “-” terminals on the compressor
control unit.
Compressor stops running,
“E1” displayed and Check
light flashes twice every 4
seconds.
Compressor has stopped
running because battery cut-
out voltage has been
reached.
Check that correct battery protection
setting is selected (refer section
Check that vehicle wiring is adequate.
Refer to section
Check battery voltage and voltage at
supply socket.
NOTE: Voltage readings must be taken
with a load on the circuit to
allow for voltage drop within the
Check that plug is correctly installed into
socket in back of fridge.
Check that plug is correctly installed into
supply socket in vehicle.
Test fridge on 100-240V AC to confirm
correct operation of fridge.
Intermittent power supply
to fridge.
Poor connection of plug into
socket in back of fridge.
Check that plug is correctly installed into
socket in back of fridge.
Check that the plug makes firm connection
with the terminals inside the fridge socket.
If fit is loose, test fridge with new power
lead. If symptom resolved, replace power
lead.
Poor connection of plug into
supply socket (eg vehicle
accessories socket).
Check that plug is correctly installed into
the supply socket.
Compressor has stopped
running because battery cut-
out voltage has been
reached.
Check that correct battery protection
setting is selected (refer section
Check that vehicle wiring is adequate.
Refer to section
