Polar Electro 520 CTH DB 2020, Instruction Book

Page: 31 / 60

Electrical system
Electrical system 12 V
The caravans have a 12 V battery for operating the heating
boiler, circulation pump, interior lighting, water pump,
kitchen fan, etc.
The battery is placed in one of the wardrobes. See page 35
for data/maintenance
The main switch button and main fuses are located near
the battery. The main switch is used only when 12 V are
available.
When 230 V is used 12 V is automatically connected
through the battery charger.
If the earth leakage circuit breaker or the
miniature circuit breakers have tripped, the
fault must first be located. In all cases apart
from an overload, the fault must be repaired
by an authorised engineer before returning
the reset button to the original position. Test
the function of the earth leakage circuit brea-
ker at regular intervals using the test button
(see picture on page 30).
∆
Wiring diagram 230 V
VÄGGINTAG 16 A
JORDSKENA
JORDFELSBRYTARE/
HUVUDBRYTARE
SÄKRING 16 A SÄKRING 10 A
BATTERILADDARE 12 V
N F
N F
UTTAGEN OCH K-DOSORNAS
PLACERING KAN VARIERA
BEROENDE PÅ VAGN OCH
VARIANT
RK 4,0 GUL/GRÖN
ANSLUTEN TILL
CHASSI
ELINTAG
PRINCIP SKISS 230V
FUSE 16 A FUSE 10 A
EARTH BAR
OUTLINE DIAGRAM 230 V
ELECTRICAL INPUT
MAINS INPUT 16 A
RK 4,0 YELLOW/
GREEN ATTACHED
INTO CHASSIS
EARTH LEAKAGE CIRCUIT
BREAKER / MASTER
SWITCH
BATTERY CHARGER 12 V
THE WALL SOCKETS AND JUNCTION
BOX CAN FLUCTUATE BETWEEN DIF-
FERENT CARAVANS AND VARIANTS
P P E E
Fuse 20 A
+12 V Supply
Fuse 20 A
- 12 V Supply
Fuse 20 A
+12 V Supply charging
from car
Fuse 10 A
+12 V Supply lighting,
sockets, etc.
Fuse 10 A
+12 V Supply lighting,
sockets, etc.
Fuse holder main fuses
The battery is charged with a 17 A battery charger (access
to 230 V required), or from the car’s alternator.
The charging from the car will only work if a 13-pins
electrical connector is installed on the car. If charging does
not work, contact an authorized car repair shop to control
that the 13-pin connector of the car is properly connected.
Due to the relatively large load on the battery when the
caravan is in use, the battery must be charged every 3-5
days. There is good reason to be sparing with the power
output if there is no potential for continuous charging of
the caravan battery.
Main switch
12 V
Main switch 12 V
If a fuse does not hold, one can select a lower value. The
load guard can be set at 6, 7, 9, 10, 11, 15, 16 or 17 Amps.
Load guard
Some caravans can be equipped with a load guard. The load
guard is used to prevent the 230 V fuses being overloaded.
If the total power consumption of the caravan exceeds
the set value, the boiler’s power will be automatically
reduced or disconnected.
The total power consumption of the caravan should not be
larger than fused power consumption (see table below).
Fuse Max power Settings overload
protection
6 A 1300 W 6 or 7 A
10 A 2300 W 9, 10 or 11 A
16 A 3600 W 15, 16 or 17 A
The load guard is disconnected in the default setting. To
connect the load guard, do the following:
1. Lock up and go into the control panel tools menu,
(see Alde manual supplied with the caravan).
2. Set the desired fuse with the button ”Amp” , (pos 16
in the picture above).
31