Troubleshooting
2999828 - 05/18 - EHG-0012-00EN
123
14
14.5 Heater/boiler
Fault Cause Remedy
Heater does not ignite Temperature sensor on
operating unit or remote
sensor defective
Pull out plug on operating
unit. The heater then
works without thermostat.
Contact the customer ser-
vice as soon as possible
Boiler empties,
safety/drainage valve has
opened
Internal temperature be-
low 3 °C
Heat inside
Safety/drainage valve
cannot be closed
Temperature at
safety/drainage valve be-
low 8 °C
Heat inside
Fan wheel runs noisily or
not steadily
Fan wheel is soiled
Contact Truma service de-
partment
None of the LEDs comes
on, device is switched on,
operating voltage is con-
nected
Automatic restart is
blocked, e.g. following an
interruption of the power
supply
Reset the device (switch
off, wait 5 seconds, switch
on again)
After switching on (winter
and summer operation)
none of the LEDs comes
on
No operating voltage Check 12 V battery volt-
age, load battery if neces-
sary
Check all electrical plug
connectors
Appliance fuse or vehicle
fuse defective
Check appliance fuse or
vehicle fuse and replace if
necessary
After switching on, the
green LED comes on but
the heater does not work
The temperature set on
the control unit is below
room temperature
Set a higher temperature
on the control unit
Green LED comes on, red
LED flashes
The safety switch on the
window above the waste
gas vent has triggered
Close the window
Risk of undervoltage; bat-
tery voltage too low
< 10.4 V
Charge the battery
The heater permanently
toggles between minimum
and maximum power
Air circulation suction sys-
tem blocked
Remove blocking of air
circulation suction system
Red LED comes on, ap-
proximately 30 seconds
after the heater is
switched on
Regulator tap or gas isola-
tor tap is closed
Open regulator tap or gas
isolator tap
Gas bottle is empty Change gas bottle
Combustion air inlet or ex-
haust gas outlet closed
Uncover openings
After extended operation,
heater registers a fault
Gas pressure regulator
iced up
Use regulator heater (de-
froster)
Level of butane in the gas
bottle too high
Use propane gas (butane
gas is unsuitable for heat-
ing especially for tempera-
tures under 10 °C)
Warm air louvres blocked Remove blocking
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