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Troubleshooting
16
275Motorcaravan - 14-09 - EN
16.5.2 Alde heater/boiler
Safety/drainage valve does
not close when switching
on
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 living area battery
(or have it charged)
Fuse is defective Replace fuse on the trans-
former/rectifier
Red and green indicator
lamps are not lit
Fuse is defective Replace fuse on the trans-
former/rectifier
Fan wheel runs noisily or
not steadily
Fan wheel is soiled Contact Truma service de-
partment
Z If a fault occurs in the system, the cause is shown on the display.
Fault Cause Remedy
Heater does not ignite with
gas operation
Lack of gas Open regulator tap and
gas isolator tap
Connect a full gas bottle
Heater does not ignite Battery voltage too low Charge battery. If the bat-
tery voltage rises above
11 V, the heater is switched
on automatically
Heater does not ignite at
240 V electrical operation
No 240 V power supply Switch on the 240 V auto-
matic circuit breaker
Connect 240 V power sup-
ply
Heater switches off Overheating Allow the heater to cool.
To reset the display, inter-
rupt the 12 V power supply
to the heater and switch it
back on again
Heater running, but no
heat at the convectors
Circulating pump does not
work
Switch on room thermo-
stat
Contact customer service
Heater and circulating
pump running, but no heat
at the convectors
Air in the heating system Bleed hot-water heater
Fault Cause Remedy
275


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