Truma CP plus error codes

 

Troubleshooting guide (Combi gas heater)

Fault code	Cause	Remedy
#17	Summer mode with empty water container	Switch heater off and allow to cool. Fill boiler with water
#18	Warm air temperature exceeded: - Not all warm air ducts are connected - Warm air outlets blocked - Circulated air intake blocked	- Check whether the 4 warm air ducts are connected - Check the individual outlet openings - Remove the circulated air intake blockage
#21	Room temperature sensor or cable faulty	Inspect the room temperature sensor cable, replace if faulty Check the resistance of the room temperature sensor. 15 °C – 16.2 kOhm / 20 °C – 12,6 kOhm / 25 °C – 10.0 kOhm Replace room temperature sensor if faulty
#24	Risk of low voltage. Battery voltage is too low < 10.4 V	Charge battery
#29	FrostControl heating element has a short circuit	Disconnect heating element plug from electronic control unit. Replace heating element
#42	Open window above cowl (window switch)	Close window.
#43	Overvoltage > 16.4 V	Check battery voltage / voltage sources such as the charger
#44	Low voltage. Battery voltage is too low < 10.0 V	Charge battery. If necessary replace old battery
#45	No 230 V operating voltage 230 V fuse defective Overheating protection has been triggered	Restore 230 V operating voltage Replace 230 V fuse (see Combi operating instructions) Reset overheating protection (see Combi operating instructions)
#112, #121, #122, #202, #211, #212	Gas cylinder empty Gas cylinder or quick-acting valve in the gas supply line 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	Replacing a gas cylinder Check gas supply and open valves Use regulator heater (EisEx) Use propane. Butane is unsuitable for heating, particularly at temperatures lower than 10 °C. Inspect openings for obstructions (slush, ice, leaves, etc.) and remove any obstructions Inspect / replace gas pressure regulation system
#255	Heater has no 12 V power supply No connection between heater and control panel	Ensure 12 V power supply Make connection between heater and control panel

Troubleshooting guide (Combi Gas heater) from year of construction 04/2018

Fault code	Cause	Remedy
#255	Heater has no 12 V power supply No connection between heater and control panel	Ensure 12 V power supply Make connection between heater and control panel
#301, #417	Overvoltage > 16.4 V	Check battery voltage / voltage sources such as the charger
#302, #418	Low voltage. Battery voltage is too low < 10.0 V	Charge battery. If necessary replace old battery
#303, #411	Risk of low voltage. Battery voltage is too low < 10.4 V	Charge battery
#401	Summer mode with empty water container	Switch heater off and allow to cool. Fill boiler with water
#402	Warm air temperature exceeded: - Not all warm air ducts are connected - Warm air outlets blocked - Circulated air intake blocked	- Check whether the 4 warm air ducts are connected - Check the individual outlet openings - Remove the circulated air intake blockage
#407	No 230 V operating voltage 230 V fuse defective Overheating protection has been triggered	Restore 230 V operating voltage Replace 230 V fuse (see Combi operating instructions) Reset overheating protection (see Combi operating instructions)
#412	Open window above cowl (window switch)	Close window.
#507, #516, #517	Gas cylinder empty Gas cylinder or quick-acting valve in the gas supply line 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	Replacing a gas cylinder Check gas supply and open valves Use regulator heater (EisEx) Use propane. Butane is unsuitable for heating, particularly at temperatures lower than 10 °C. Inspect openings for obstructions (slush, ice, leaves, etc.) and remove any obstructions Inspect / replace gas pressure regulation system
#607	Max. number of fault resets reached	Wait 15 minutes and reset fault
#621	Room temperature sensor or cable faulty	Inspect the room temperature sensor cable, replace if faulty Check the resistance of the room temperature sensor. 15 °C – 16.2 kOhm / 20 °C – 12,6 kOhm / 25 °C – 10.0 kOhm Replace room temperature sensor if faulty
#624	FrostControl heating element has a short circuit	Disconnect heating element plug from electronic control unit. Replace heating element

Troubleshooting guide (Combi Diesel heating system)

Fault code	Cause	Remedy
#111	Room temperature sensor or cable faulty	Inspect the room temperature sensor cable, replace if faulty Check the resistance of the room temperature sensor. 15 °C – 16.2 kOhm / 20 °C – 12,6 kOhm / 25 °C – 10.0 kOhm Replace room temperature sensor if faulty
#122	Lack of fuel due to insufficient fuel tank filling, tank has run empty and / or vehicle is on a slope	Fill tank with fuel. Then fill the fuel line as described in “Initial startup” (see Combi Diesel operating instructions).
#131	No connection between heater and control panel	Make connection between heater and control panel
#132	FrostControl heating element has a short circuit	Disconnect heating element plug from electronic control unit. Replace heating element
#150	Warm air temperature exceeded: - Not all warm air ducts are connected - Warm air outlets blocked - Circulated air intake blocked	- Check whether the 4 warm air ducts are connected - Check the individual outlet openings - Remove the circulated air intake blockage
#151	Water temperature exceeded in winter mode: Water temperature sensor excessive temperature Warm air outlets blocked Circulated air intake blocked	Switch off appliance and allow it to cool down. Fill boiler with water Check the individual outlet openings Remove the circulated air intake blockage
#152	Water temperature exceeded in summer mode: Water temperature sensor excessive temperature Warm air outlets blocked Circulated air intake blocked	Switch off appliance and allow it to cool down. Fill boiler with water Check the individual outlet openings Remove the circulated air intake blockage
#160	Undervoltage < 10.2 V	Check battery voltage, charge if necessary Short-term immediate measure. Switch off major consumers or start up the vehicle engine until the heater starts to operate (approx. 4 minutes) Battery capacity inadequate, if necessary exchange old battery
#161	Overvoltage > 16.4 V	Check battery voltage / voltage sources such as the charger
#162	Open window above cowl (window switch)	Close window.
#164	No 230 V operating voltage 230 V fuse defective Overheating protection has been triggered	Restore 230 V operating voltage Replace 230 V fuse (see Combi operating instructions) Reset overheating protection (see Combi operating instructions)
#170	Risk of low voltage. Battery voltage is too low < 10.4 V	Charge battery
#255	Heater has no 12 V power supply No connection between heater and control panel	Ensure 12 V power supply Make connection between heater and control panel

Troubleshooting guide (air conditioning system)

Fault code	Cause	Remedy
#1	Failure (short circuit or broken cable), room temperature sensor	Contact Truma Service
#2	Ice sensor (inside) triggered	Inspect the filter and replace it if necessary
#4	Ice sensor (outside) triggered	Keep the air inlets / outlets on the roof free of obstructions such as leaves
#8	IR receiver unplugged or cable broken	Check the connection of the IR receiver
#17	Voltage drop at 230 V power supply	Check 230 V power supply