Operation Manual

1
22 Motorcaravan - 09-08 - DET-0033-07E
N
Electrical system
9
Volume of water/waste
water
The V/tank gauge is for the indication of the quantity of water or waste water.
With the V/tank gauge (Fig. 136,4), use the bottom scale. The gauge automat-
ically lights up as soon as a switch is pressed.
Battery voltage
(values during
operation)
Mobile operation
(vehicle moving,
no 240 V con-
nection)
Battery opera-
tion
(vehicle station-
ary, no 240 V
connection)
Power operation
(vehicle station-
ary, 240 V con-
nection)
Danger of total
discharge (battery
alarm)
11 V or less
1)
1)
The battery guard switches all the appliances off (at 10.5 V).
12 V power sup-
ply overload
If appliances are
switched off: Bat-
tery flat
If appliances are
switched on: Bat-
tery overload
12 V power sup-
ply overload
The battery is not
charged by the al-
ternator, the alter-
nator's regulator
is defective
The battery is not
charged by the
transformer/rectifi-
er, the transform-
er/rectifier is
defective
11.1 V to 13.2 V 12 V power sup-
ply overload
2)
2)
If the voltage does not exceed this range for several hours.
Normal range 12 V power sup-
ply overload
2)
The battery is not
charged by the al-
ternator, the alter-
nator's regulator
is defective
The battery is not
charged by the
transformer/rectifi-
er, the transform-
er/rectifier is
defective
13.3 V to 13.7 V Battery is being
charged (main
charge)
Occurs only brief-
ly after charging
Battery is being
charged (main
charge)
13.8 V to 14.4 V Battery being
charged (float
charge)
– Battery being
charged (float
charge)
Over 14.5 V Battery is over-
charged, defec-
tive alternator
control
– Battery is over-
charged, defec-
tive transformer/
rectifier
Values for off-load voltage Charging condition of the battery
Less than 11 V Totally discharged
12.3 V 50 %
12.5 V 75 %
More than 12.8 V Full
Total discharge causes irreparable damage to the battery.
Only read the tank levels briefly. Keeping the reading option on for a long
time can damage the transducers.