Operation Manual

12
1M
otorcaravan - 09-08 - DET-0033-07EN
Electrical system
9
Measures: Switch off all electrical appliances that are not absolutely essential at the
corresponding switch.
If necessary, use the 12 V main switch to switch the 12 V power supply
back on for a short while. This is only possible, however, when the battery
voltage is above 11 V. If the voltage is below this level, the 12 V power
supply cannot be switched on again until the living area battery has been
recharged.
9.6.4 Charging the battery
When the vehicle engine is running, the vehicle alternator recharges the living
area battery and the starter battery. When the vehicle engine is switched off,
the batteries are automatically disconnected from one another by a relay in the
transformer/rectifier. This prevents the starter battery from being run down by
electrical appliances in the living area. The starting capability of the vehicle is
thus preserved. The charging condition of the living area battery or the starter
battery can be read on the panel.
If the vehicle is connected to the 240 V power supply, the living area battery
and the starter battery are automatically charged by the charger module on the
transformer/rectifier. The starter battery is only charged with a float charge.
The charging current is adapted to suit the charging condition of the battery.
This ensures that it is not possible to overload the battery.
To make use of the maximum output from the charger module on the trans-
former/rectifier, switch off all electrical appliances during charging.
9.7 Panel IT 20-3
9.7.1 V/tank gauge for battery voltage and water or waste water
levels
Battery voltage The V/tank gauge is for the indication of the battery voltage of the starter bat-
tery or the living area battery.
With the V/tank gauge (Fig. 136,4), note the top scale. The gauge automati-
cally lights up as soon as a switch is pressed.
Displays:
Press the upper part of the rocker switch (Fig. 136,3) " ": The battery
voltage of the starter battery is displayed.
Press the lower part of the rocker switch (Fig. 136,3) " ": The battery
voltage of the living area battery is displayed.
The table below will help you correctly interpret the displayed battery voltage
of the living area battery.
Fig. 136 Panel IT 20-3
1 12 V main switch
2 12 V indicator lamp
3 Rocker switch for reading the battery
voltage of the starter and living area
batteries
4 V/tank gauge
5 Rocker switch for reading the level in
the water or waste water tanks
6 240 V indicator lamp
7 ALARM warning light for the living
area battery