Equipment details
89
Troubleshooting
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 voltage, charge if necessary.
- Check all electrical plug connections.
- Check the unit or vehicle fuse and replace if necessary
(see fuses).
The green LED comes on when the unit
is switched on, but the heater does not
operate.
- The temperature setting on the
control panel is lower than the room
temperature.
- Select higher room temperature at the control panel.
The green LED comes on when the unit
is switched on (by means of the ZUCB
time switch), but the heater does not
operate.
- Open window above cowl
(window switch).
- Battery voltage is too low < 10.5 V.
- Close window.
- Charge battery.
After the heater is switched on, the green
LED is lit and the red LED blinks.
- Electronics are defective. - Please contact the Truma Service Centre.
Approximately 30 seconds after the
heater is switched on, the red LED is lit.
- Gas cylinder or quick-closure valve in
the gas line is closed.
- Combustion air infeed or exhaust outlet
is sealed.
- Check gas supply and open valves.
- Inspect openings for contamination (slush, ice, leaves,
etc.) and remove contamination if necessary.
After operating for a longer period of
time, the heater switches to failure.
- 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.
- Switch device off and allow to cool. Fill boiler with water.
- Check individual outlet apertures.
- Remove blockage from recirculated air intake.
- Use regulator heating (EisEx).
- Use propane (at temperatures below 10 °C in particular,
butane is unsuitable for heating purposes).
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