9-12
FITTED EQUIPMENT
FAULT FINDING
GAS OPERATION
Symptom Cause
When switching on, the heater does not operate a) No 12V supply
b) Window open
Check the power supply (operation voltage min. 10.5V)
Check the water heater fuse (refer to maintenance “Fuses”).
Close any windows above the cowl.
When switching on, the heater does not operate a) Cowl cover fitted
and the red lamp lights up b) Air in the gas supply
c) No gas supply
d) Incorrect gas pressure
Remove cowl cover and/or clear any obstruction.
Check gas valves and gas bottle.
To unlock (and purge air), switch off the appliance, wait 5 minutes, and switch on again.
Heater operates for a prolonged time and a) Over temperature thermostat
then the red lamp lights up operated
Check water content, refill if required (close drain valve).
To unlock, switch off the appliance, wait 5 minutes, and switch on again.
ELECTRICAL OPERATION
Symptom Cause
When switching on, the heater does not operate a) No 230V supply voltage
b) Over temperature thermostat
operated
Connect the caravan to the site supply and/or check residual current circuit breaker.
Check water content, refill if required (close drain valve).
The electrical heating element is fitted with an excess temperature cut-out. In event of a fault,
switch off at the control panel, wait 5 minutes, then switch on again.
WATER SUPPLY
Symptom Cause
Water drips from the safety/drain valve a) Water pressure too high
Check water pressure (max. 2.8 bar), use a pressure reducer when connected to central water
supply.
When opening the cold water tap, hot a) Hot water flows back through
water comes out. the cold water supply
Fit a no-return valve in the cold water supply (refer to installation instructions).
If fault persists contact Truma Service.
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