Harmony User Guide oduction
061
Harmony - Troubleshooting Guide
61
www.auto-sleepers.co.uk/harmony
60
Harmony - Troubleshooting Guide
Truma Combi Heating System (Diesel)
Fault Code Possible 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 – 10.0kOhm
Replace the 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 start-up” (see Combi Diesel operating instructions).
# 131
No connection between
heater and control panel
Make connection between heater and control panel
Control panel cable faulty
Contact Truma Service
# 132
Frost Control 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
Check whether the 4 warm air ducts are connected
Warm air outlets blocked
Check the individual outlet apertures
Circulated air intake blocked Remove the circulated air intake blockage
# 151
Water temperature exceeded:
Summer mode with empty
water container
Switch appliance off and allow to cool. Fill boiler with water
# 152
Water temperature
exceeded in summer mode Switch appliance off and allow to cool. Fill boiler with water
# 160
Undervoltage < 10.2V
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 > 16.4V
Check battery voltage / voltage sources such as the charger
# 162
Open window above cowl
(window switch)
Close Window
# 164
No 230V operating voltage
Restore 230 V operating voltage
230V fuse defective
Replace 230 V fuse
Overheating protection has
been triggered
Contact Truma Service
# 170
Risk of low voltage < 11.5V
Use the electrical power from the battery sparingly, e.g.
restrict lighting
Charge battery
Truma Combi Heating System (Gas)
Fault Code
Possible Cause
Remedy
# 17
Summer mode with empty
water container
Switch heater off and allow to cool. Fill boiler with water
# 18
Warm air outlets blocked
Check the individual outlet apertures
Circulated air intake blocked 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 the room temperature sensor if faulty
# 24
Risk of low voltage. Battery
voltage is too low < 10.4 V
Charge battery
# 29
Frost Control 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 > 16.4V
Check battery voltage / voltage sources such as the charger
# 44
Low voltage. Battery voltage
is too low < 10.0V
Charge battery. If necessary replace old battery
# 45
No 230 V operating voltage
Restore 230 V operating voltage
230 V fuse defective
Replace 230 V fuse
Overheating protection has
been triggered
Please contact Truma Service
# 112,
# 202,
# 121,
# 211,
Gas cylinder or quick-acting
valve in the gas supply line
closed
Check gas supply and open valves
Gas pressure regulation
system iced up
Gas pressure regulation system iced up Use regulator
heater (EisEx)
Butane content in the gas
cylinder too high
Use propane. Butane is unsuitable for heating, particularly
at temperatures lower than 10 °C.
# 122,
# 212
Combustion air infeed or
exhaust outlet is sealed
Inspect openings for obstructions (slush, ice, leaves, etc.)
and remove any obstructions
Gas pressure regulation
system faulty
Inspect / replace gas pressure regulation system
Electronic system faulty
Please contact Truma Service
# 255
Heater has no 12 V power
supply
Ensure that the 12V power supply is available
No connection between
heater and control panel
Make connection between heater and control panel
Control panel cable faulty
Contact Truma Service
