Troubleshooting Guide (Combi Gas Heater) - Truma Combi Gebrauchsanweisung

Troubleshooting guide (Combi Gas heater)

Flashing code at analogue control panel – CP Classic
Flash sequence LED:
– On / Off:
Pause between flash sequence:
Fault
No LED is on, the unit is switched
on and is supplied with operating
voltage
No LED illuminates
after switching on
The green LED comes on when the
unit is switched on, but the heater
does not operate
After switching on the heater, the
green LED illuminates and the
yellow LED flashes 1 x
(heater continues operating)
yellow LED flashes 2 x
(heater not operating)
(only with Combi E)
yellow LED flashes 3 x
10
0.5 seconds
5 seconds
Cause
– Automatic restart is blocked, e.g.
after a power failure
– No operating voltage
– Device fuse or vehicle fuse
defective
– The temperature setting on the
control panel is lower than the
room temperature
– Risk of low voltage
Battery voltage too low
< 10.4 V
– Low voltage
Battery voltage too low
< 10.0 V
– Overvoltage > 16.4 V
– No 230 V operating voltage
– 230 V fuse defective
– Overheating protection has been
triggered
– Open window above cowl
(window switch)
Rectification
– Reset (fault reset) by switching off, waiting 5 seconds and then
switching on again
– Check 12 V battery voltage, charge battery if necessary
– Check all electrical plug connections
– Check fuse of unit or vehicle and replace if necessary (see fuses)
– Select higher room temperature at the control panel
– Charge battery
– Charge battery. If necessary replace old battery
– Check battery voltage and voltage sources such as the charger
– Restore 230 V operating voltage
– Replace 230 V fuse
– Reset overheating protection, allow heater to cool,
remove connection cover and press reset button
– Close window