Truma CP Plus Mode D'emploi page 37

Fault code Cause
W 301 H Overvoltage > 16.4 V
W 417 H
W 302 H Low voltage. Battery voltage is too low < 10.0 V
W 418 H
W 303 H Risk of low voltage. Battery voltage is too low < 10.4 V
W 411 H
W 401 H Summer mode with empty water container
W 402 H Warm air temperature exceeded:
Not all warm air ducts are connected
Warm air outlets blocked
Circulated air intake blocked
W 407 H No 230 V operating voltage
230 V fuse defective
W 408 H No gas supply in Mix mode
W 412 H Window above cowl open (window switch)
E 507 H Gas cylinder empty
E 516 H
Gas cylinder or quick-acting valve in the gas supply line
E 517 H
closed
Gas pressure regulation system iced up
Butane content in the gas cylinder too high
Combustion air infeed or exhaust outlet is sealed
Gas pressure regulation system faulty
E 607 H Max. number of fault resets reached
E 621 H Room temperature sensor or cable faulty
E 624 H FrostControl heating element has a short circuit
E 632 H Overheating protection has been triggered
If these measures do not remedy the malfunction or if fault codes are displayed that you cannot find in the trouble-
shooting guide, contact Truma Service.
Remedy
Check battery voltage / voltage sources such as the charger
Charge battery. If necessary replace old battery
Charge battery
Switch heater off and allow it to cool. Fill boiler with water
Check whether the 4 warm air ducts are connected
Check the individual outlet openings
Remove the circulated air intake blockage
Restore 230 V operating voltage
Replace 230 V fuse (see Combi operating instructions)
Check gas supply. See fault # 507
(electronic heating continues in Mix mode)
Close window
Replace the gas cylinder
Check gas supply and open valves
Use regulator heater (EisEx)
Use propane. Butane is unsuitable for heating, particularly at temper-
atures below 10 °C.
Inspect openings for obstructions (slush, ice, leaves, etc.) and
remove any obstructions
Inspect / replace gas pressure regulation system
Wait 15 minutes and reset fault
Inspect the room temperature sensor cable, replace if faulty
Disconnect heating element plug from electronic control unit.
Replace heating element
Reset overheating protection (see Combi operating instructions)
EN 37