Symptom
Fridge not operating
on 12v
Fridge ignition not
operating
RCD not operating
RCD constantly tripping
unable to reset
10 amp MCB tripping
5 amp MCB tripping
Charger system
No power on 12v de
circuits
Overload trip tripping
out
Red indicator (Batt on
charge) off on panel
Cause
Fridge fuse on panel
blown
Relay at rear of panel
not operating
11.2
Heater element on fridge
faulty
Fuse No 2 on panel blown
Spark unit on fridge
faulty
Switch faulty
Faulty RCD unit
Supply fault
Incorrect wiring
Appliance fault
Overload due to incorrect
appliance being used
Fault on fridge unit
Overload trip on charger
out
Overload on circuits more
than 15 amp being drawn
Short on a 12v circuit
Battery fully charged
Fault on charger unit
Wiring at charger incorrect
4 Core cable incorrectly
wired at charger panel
Remedy
Check fuse
Test relay for operation
Check fuse
Replace spark unit
Test switch for operation
Test - switch for operation
Check input lead wiring
Check for suitability of
appliance eg current
consumption rating should
not exceed 13 amp
Check fridge
Reset trip
Test current consumption
Test for short
Check condition of battery
Check charger unit, replace
if necessary
Check wiring
Check polarity of 4 core at
both points