Troubleshooting
120
2999828 - 05/18 - EHG-0012-00EN
14
Fault Cause Remedy
Living area battery is not
charged during vehicle
operation
Fuse on terminal D+ of
the alternator is defective
Replace fuse
Disconnector relay in the
transformer/rectifier is de-
fective
Contact customer service
12 V indicator lamp does
not light up
12 V power supply is
switched off
Switch 12 V power supply
on
Battery cut-off switch on
the transformer/rectifier is
switched off
Set battery cut-off switch to
on
Starter or living area bat-
tery is not charged
Charge the starter or living
area battery
Disconnector relay in the
transformer/rectifier is de-
fective
Contact customer service
Flat fuse on the living
area battery is defective
Replace flat fuse on the liv-
ing area battery
12 V power supply does
not work
12 V power supply is
switched off
Switch 12 V power supply
on
Battery cut-off switch on
the transformer/rectifier is
switched off
Set battery cut-off switch to
on
Living area battery is dis-
charged
Charge the living area bat-
tery
Jumbo flat fuse on the liv-
ing area battery is defec-
tive
Replace jumbo flat fuse on
the living area battery
Disconnector relay in the
transformer/rectifier is de-
fective
Contact customer service
12 V power supply does
not work in 230 V opera-
tion
12 V power supply is
switched off
Switch 12 V power supply
on
Battery cut-off switch on
the transformer/rectifier is
switched off
Set battery cut-off switch to
on
230 V automatic circuit
breaker has triggered
Contact customer service
Charger module in the
transformer/rectifier is de-
fective
Contact customer service
Jumbo flat fuse on the liv-
ing area battery is defec-
tive
Replace jumbo flat fuse on
the living area battery
Mains check symbol does
not light up even though
230 V mains supply is
connected
The mains connection is
de-energised
Check external mains
connection
230 V automatic circuit
breaker upstream of
transformer/rectifier has
tripped or is switched off
Reset 230 V automatic cir-
cuit breaker
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