113I-Modell - 11/12 - Ausgabe 09/11 - 2096165 - BUE-0056-05EN
Electrical system
8
8.4.1 Battery cut-off switch
The battery cut-off switch switches off all the appliances in the living area,
even inactive ones. Even appliances such as the entrance step, basic lighting
or the refrigerator will stop working. This prevents the living area battery from
slowly discharging if the vehicle is not used for a longer period of time (e.g.
temporary lay-up).
If the vehicle is connected to the 230 V power supply, the batteries can then
be charged from the transformer/rectifier, even if the battery cut-off switch is
switched off.
This also applies for charging via a solar installation or fuel cell.
8.4.2 Battery selector switch
8.4.3 Battery monitor
The battery monitor in the transformer/rectifier monitors the voltage in the
living area battery.
If the battery voltage falls below 10.5 V, the battery monitor in the transformer/
rectifier switches off all the 12 V appliances. The battery cut-off switch is acti-
vated.
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.
8.4.4 Charging the battery
When the vehicle engine is running, a relay in the transformer/rectifier alter-
nator switches on the living area battery and the starter battery together and
recharges them with the vehicle generator. When the vehicle engine is
switched off, the batteries are automatically disconnected from one another
again by 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 terminal voltage of the living area battery or
the starter battery can be read on the panel.
X If the battery selector switch is set incorrectly, there is the danger of the
formation of detonating (oxy-hydrogen gas). Danger of explosion!
Z Incorrect setting of the battery selector switch damages the living area bat-
tery.
Z The factory settings of the battery selector switch must not be changed.
Z You must fully recharge a discharged living area battery as soon as pos-
sible.
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