Troubleshooting
2999828 - 05/18 - EHG-0012-00EN
121
14
Fault Cause Remedy
No voltage at a con-
nected appliance
Self-resetting Polyswitch
fuse has tripped
Check plug connectors and
cables. Switch off 12 V
power supply for approx.
2 minutes, then switch it
back on
Self-resetting Polyswitch
fuse has tripped several
times (3 times), system
has deactivated corre-
sponding output perma-
nently
Remedy cause of Pol-
yswitch tripping
Cancel permanent switch-
off (switch on 12 V power
supply for living area, press
rotary knob and keep it
pressed for minimum 3 sec-
onds)
Starter battery is dis-
charged in 12 V operation
Disconnector relay in the
transformer/rectifier is de-
fective
Contact customer service
Battery cut-off switch on
the transformer/rectifier is
switched off
Set battery cut-off switch to
on
No voltage is supplied by
the living area battery
Living area battery is dis-
charged
Charge living area battery
immediately
Total discharge
damages the
battery.
If the vehicle is to be laid up
for a long period, fully
charge the living area bat-
tery beforehand
Discharging is caused by in-
active appliances (see
chapter 8)
Battery charge through
solar module not working
Electrical connection to
solar module interrupted
Check plug connectors and
cables
Fuse is defective Replace fuse on the trans-
former/rectifier
Solar charge regulator
defective
Contact customer service
Living area battery over-
loaded ("hot")
Battery selection switch
set wrongly
Move position of battery se-
lection switch
Defective load sensor or
relay
Pull out the jumbo flat fuse
on the living area battery,
then contact customer ser-
vice
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