hymer BMC 550, Instruction Manual

Page: 227 / 252

Troubleshooting 14
B-MC - 12/18-2 - EHG-0016-01EN
227
Fault Cause Remedy
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
defective Contact customer service
Jumbo flat fuse on the liv-
ing area battery is defec-
tive Replace jumbo flat fuse on
the living area battery
230 V indicator lamp 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
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
defective 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)