97Motorcaravan - 09/21-0 - GLO-MJ22-00EN
Boiler empties, safety/
drainage valve has ope-
ned
Temperature at the drai-
nage valve below approx.
3°C
Switch on the heater. At
temperatures below ap-
prox. 3 °C the drainage
valve opens automati-
cally.
Battery cut-off switch or
main switch on the trans-
former/rectifier is swit-
ched off
Switch battery cut-off
switch or main switch on
Operating voltage under
10.8 V
Charge, have charged or
renew the living area bat-
tery
Fuse is defective Replace fuse on the
transformer/rectifier
Safety/drainage valve
does not close during
switching on
Battery cut-off switch or
main switch on the trans-
former/rectifier is swit-
ched off
Switch battery cut-off
switch or main switch on
Operating voltage under
10.8 V
Charge/have living area
battery charged
Fuse is defective Replace fuse on the
transformer/rectifier
Temperature at the drai-
nage valve below approx.
7°C
Switch on the heater.
When heater is not ope-
rating, drainage valve
only closes again at tem-
peratures above approx.
7°C.
Red and green indicator
lamps are not lit
Fuse is defective Replace fuse on the
transformer/rectifier
Fan wheel runs loudly or
unevenly
Fan wheel soiled Contact Truma Service
Fault Cause Remedy
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