Operation Manual

12
3M
otorcaravan - 09-08 - DET-0033-07EN
Electrical system
9
Displays:
Press the upper part of the rocker switch (Fig. 136,5) " ": The volume of
water is displayed.
Press the lower part of the rocker switch (Fig. 136,5) " ": The volume of
waste water is displayed.
9.7.2 Battery alarm for the living area battery
The red ALARM warning light (Fig. 136,7) flashes as soon as the voltage of
the living area battery falls below 11 V (measured under operation) and there
is a risk of a total discharge.
9.7.3 12 V main switch
The 12 V main switch (Fig. 136,1) switches the panel and the 12 V power
supply of the living area on and off.
Exception: Depending on the model, safety/drainage valve, heater, basic light
(lighting in the entrance area), entrance step and spare 4 remain ready to
operate.
Switching on:
Press the upper part of the rocker switch (Fig. 136,1) "12 V": The 12 V
living area power supply is switched on. The indicator lamp (Fig. 136,2)
lights up green.
Switching off:
Press the lower part of the rocker switch (Fig. 136,1) " ": The 12 V
living area power supply is switched off. The indicator lamp (Fig. 136,2)
goes out.
9.7.4 12 V indicator lamp
The 12 V indicator lamp (Fig. 136,2) illuminates whenever the 12 V main
switch (Fig. 136,1) is switched on.
9.7.5 240 V indicator lamp
The yellow 240 V indicator lamp (Fig. 136,6) illuminates whenever line voltage
is available at the transformer/rectifier input.
When the battery alarm comes on, switch off the appliances and charge the
living area battery, either by mobile operation or by connection to a 240 V
power supply.
Total discharge damages the battery.
If the battery voltage falls below 10.5 V, the battery monitor in the trans-
former/rectifier switches off all of the 12 V appliances, excluding the safety/
drainage valve.
When leaving the vehicle, switch off the 12 V main switch. This prevents
any unnecessary discharge of the living area battery.
Appliances such as the safety/drainage valve, charger, solar charge regu-
lator and panel consume approx. 20 mA to 65 mA of electricity from the
battery capacity, even when the 12 V main switch is turned off. Therefore
disconnect the living area battery from the 12 V power supply, if the vehicle
will not be used for a long period of time.