FITTED EQUIPMENT FITTED EQUIPMENT

truma combi boiler fault finding

Fault Cause rectification

After switching on (winter and summer operation) none of the LEDs are lit.

- No operating voltage

- Device fuse or vehicle fuse defective

- Check 12 V battery voltages, change if necessary.

- Check all electrical plug connections

- Check the unit or vehicle fuse and replace if necessary (see fuses)

- Select higher room temperature at the control panel

The green LED comes on when the unit is switched on but the heater does not operate.

After the heater is switched on, the green LED is lit and the red LED blinks.

Approximately 30 seconds after the heater is switched on, the red LED is lit.

- The temperature setting on the control panel is lower than the room temperature

- Electronics are defective - Please contact the Truma

Service Centre

After operating for a longer period of time, the heater switches to failure.

Green and red LEDs blink after heater is switched off

Green LED blinks after heater is switched off

- Gas cylinder gas shut off valve at the manifold is closed

- Combustion air infeed or exhaust outlet is sealed

- Summer operation with empty water tank

- Hot air outlets blocked

- Recirculated air intake blocked

- Gas pressure regulator iced up

- Butane content in the gas cylinder too high

- Unit was switched off during failure. After running is active in order to reduce the unit’s temperature

- After running is active in order to reduce the unit’s temperature

- Check gas supply and open valves

- Inspect opening for contamination (slush, ice, leaves, etc.) and remove contamination if necessary

- Switch device off and allow to cool. Fill boiler with water

- Check individual outlet aperture

- Remove blockage from recirculated air intake

- Use regular heating (EisEx)

- Use propane (at temperatures below 10˚C in particular, butane is unsuitable for healing purposes

- After running will switch off after a few minutes. Only at that time will a failure reset be possible (switch off and then back on)

- No failure. After running will switch off after approximately 5 minutes

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