Truma CP plus User Manual

26
34020-01385 · 00 · 07/2022
EN
Troubleshooting guide Truma CP plus
Fault
code
Cause Remedy
E 112 H,
E 121 H,
E 122 H,
E 202 H,
E 211 H,
E 212 H
Flame out or not detected,
Flame unstable during operation,
Gas supply interrupted
Check that the gas supply has the correct operating pressure
(see Fault catalogue, gas supply)
E122H Lack of fuel due to low tank level, tank is empty and / or
vehicle is on a slope
Fill tank with fuel and then fill the fuel line (see operating instruc-
tions / initial start-up)
W 255 H Heater has no 12 V power supply Check the 12 V power supply at the appliance input; to test, discon-
nect the power supply unit and the solar system from the on-board
power supply
No connection between heater and control panel Check the control panel cable and make sure there is connection be-
tween the heater and the control panel
W 301 H,
W 417 H
12 V power supply faulty (overvoltage) Check the 12 V power supply at the appliance input; to test, discon-
nect the power supply unit and the solar system from the on-board
power supply
W 302 H,
W 418 H
12 V power supply faulty (low voltage) Charge battery and check contacts, replace old battery
W 303 H,
W 411 H
Risk of low voltage�
Battery voltage too low < 10�4 V
Check the function with the motor running, check the power supply
unit or other batteries� Charge battery and check contacts, replace
old battery
W 401 H Hot water mode with empty water container Switch heater off and allow it to cool�
Fill the water container with water
W 402 H Warning Air overheat condition
Not all warm air ducts are connected Make sure that all warm air ducts are connected to the heater
Warm air outlets blocked Check whether the warm air ducts are damaged or kinked
Circulated air intake blocked Remove the blockage in the circulated air intake and ensure that the
installation space is sufficiently ventilated
W 407 H 230 V power supply faulty Check the 230 V power supply at the appliance input
Have an expert check the 230 V 10 AF, H fuse and replace it if
necessary

Truma CP plus Specifications

General

Display	LCD
Power supply	12 V DC
Quiescent current consumption (at 12 V)	Approx. 5 mA
Temperature range	-15 °C to +60 °C
Protection class	IP20
Compatibility	Truma Combi heaters