Instruction manual

8 Electrical Fittings
74 Touring - 03/11-1 - englisch (EN) - 0731070 - HYW-0102-01EN
8.3 12 V Power Supply
When the caravan is not connected to the 240 V power supply, 12 V supply is performed either by
the battery of the connected towing vehicle or by the living area battery (Power Pack SE). If the car-
avan is electrically connected to the towing vehicle, the living area battery is charged by the vehicle
generator when the vehicle’s engine is running.
The living area battery has a limited power supply only. For this reason, the electrical appliances
should not be operated for a long time without using the 240 V power supply or supplied by the living
area battery with voltage when the vehicle’s engine is switched off.
In order to prevent fast discharge of the living area battery, the refrigerator is operated on 12 V sup-
ply only when the engine is running and when there is an electrical connection between the towing
vehicle and caravan.
8.3.1 Power Pack
The power pack (Fig. 58 or Fig. 59) is installed in the front under the table on the left or in a bedding
box.
Without a connection to the 240 V supply, the requisite power supply is provided by the battery of
the towing vehicle, as long as contact 9 "constant positive", is connected to the towing vehicle socket
(see connection diagram at the end of this chapter). The 12 V living area lamps, the cassette toilet
and the water pump can be used.
When the 240 V supply is connected, the power pack switches the power supply in the living area
automatically from the towing vehicle battery to mains operation. A connected battery (Power Pack
SE) is recharged.
The thermal cut-out in the power pack switches all 12 V consumers in the caravan off, if the power
pack overheats. The power pack can overheat, if the ventilation apertures are covered by clothing
or if many 12 V consumers are operated for a long time.
When the thermal cut-out has triggered, the power pack automatically switches back on after cooling
down.
If you use the battery of the towing vehicle to provide power for the caravan, bear in
mind that the battery capacity is restricted. If you place too great a burden on the bat-
tery, this may lead to starting difficulties.
Always disconnect the electrical connection between the towing vehicle and the cara-
van before the caravan is connected to a 240 V supply or if the living area battery is
being charged by an external device.
> The towing vehicle battery is not charged by the power pack.