Troubleshooting Guide (Combi Gas Heating System) - Truma CP classic Gebrauchsanweisung

Troubleshooting guide (Combi Gas heating system)

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
current
No LED illuminates
after switching on.
The green LED comes on when the
unit is switched on, but the heating
system does not operate
After switching on the heating sys-
tem, the green LED illuminates and
the yellow LED flashes 1 x
(Heating system continues to operate)
yellow LED flashes 2 x
(Heating system not operating)
(Only with Combi E)
yellow LED flashes 3 x
18
0.5 seconds
5 seconds
Cause
– Automatic restart is blocked, e.g.
after an 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 heating system to cool,
remove connection cover and press reset button
– Close window