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Troubleshooting
16
274 Motorcaravan - 14-09 - EN
16.5.1 Heater/boiler Truma
Fault Cause Remedy
Heater does not ignite Temperature sensor on op-
erating unit or remote sen-
sor defective
Pull out plug on operating
unit. The heating then
works without thermostat.
Contact the customer serv-
ice as soon as possible
Red indicator lamp "Fault"
illuminates
Air in the gas pipe system Switch off and on again.
After two futile ignition at-
tempts, wait for
10 minutes before trying
again
Lack of gas Open regulator tap and
gas isolator tap
Connect a full gas bottle
Defect of a safety element Contact customer service
Red indicator lamp "Fault"
is flashing
Operating voltage too low Charge or replace the liv-
ing area battery (or have it
charged or replaced)
Green indicator lamp be-
hind knob is not lit
Fuse on the transformer/
rectifier is defective
Replace fuse on the trans-
former/rectifier
Fuse in the electronic con-
trol unit has been trig-
gered
Contact customer service
Living area battery defec-
tive
Charge or replace the liv-
ing area battery (or have it
charged or replaced)
Yellow indicator lamp on
the energy selector switch
does not illuminate
No supply voltage Check 240 V connection
and fuses
Overheating switch was
triggered
Press overheating switch
Boiler empties, safety/
drainage valve has opened
Internal temperature be-
low 7 °C
Heat inside
Safety/drainage valve sep-
arated from battery supply
Cancel battery separation.
In order to do this switch
on the battery cut-off
switch on the transformer/
rectifier or deactivate the
battery separation via the
panel
Operating voltage below
10.8 V
Charge or replace the liv-
ing area battery (or have it
charged or replaced)
Fuse is defective Replace fuse on the trans-
former/rectifier
274


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