Fault Finding

Truma Hot Water Systems

Gas & Electrical Operation.

Gas Operation


 

Symptom

Cause

Remedy

When switching on the heater does not operate

No 12V power supply. Check the power supply (operation voltage minimum 12.0V)
Check the boiler fuse

When switching on heater does not operate and the red lamp lights up after approximately 30 seconds

Cowl cover fitted to exterior vent. Air in the gas supply.

No gas supply

Remove cowl cover and clear any obstruction
Check gas valve open and gas bottle has gas
To purge air from system, switch off the appliance, wait 5 minutes and switch on again

Heater operates for a prolonged time, and then the red lamp lights

Over temperature protection has operated Check system is filled with water, refill if required (close drain valve).
To unlock, switch off the appliance, wait 5 minutes and switch on again

Electrical Operation


Sympton

Cause Remedy
When switching on, the heater does not operate Over temperature protection operated Connect the caravan to the site supply and check circuit breaker
Check system is filled with water, refill if required (close drain valve).
If the over temperature cutout has been activated, switch unit off, wait 5 minutes then switch on again.

 If fault persists please contact the nearest Dometic Service Agent.

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