12
Operation
3.1 Switching on
Devices of the type 1 (see Fig. 4page 33)
can be switched on and off using the
On/Off switch. 230 V AC input voltage is
available when the LED under the ON/OFF
switch is lit green. If the green LED does not
light, there is no 230 V AC input voltage
present at the unit or the device has swit-
ched off due to overheating (see point
3.2.1).
Devices of the types 2 a + b switch on as
soon as 230 V voltage is available at the
connection.
The consumers can be supplied with power
independently of the 230 V operation using
a 12 V DC energy source (e.g. battery) if this
is connected to the converter. The internal
priority circuit disconnects the 12 V DC
energy source automatically as soon as
230 V AC is present. The AC/DC converter
is not a charger.
3.2 Safety devices
The thermal overload cut-out trips in the
case of the unit overheating. To reactivate
the unit, first switch it OFF. Wait for at least
60 seconds before restarting the system.
230V
AC supply
As soon as the circuit breaker (in the fuse
box) is in the ON position and the vehicle is
connected to a 230V AC power supply, the
AC/DC converter is ready for operation.
12VDC supply
If no 230V AC supply is available, a 12V DC
power source (e.g. battery) can be connec-
ted to the AC/DC converter; the consumers
will then be supplied from this source.
If the thermal overload cut-out trips again
and switches off the appliance, the cause
may be insufficient ventilation. If this is the
case, provide better ventilation and restart
the unit.
If the thermal overload cut-out still trips
afterwards, please contact an authorised
Dometic service partner.
3.2.1 Overtemperature protection
Dometic AC/DC converters have various
safety functions for your safety.
3.0 Operation of the
AC/DC converter
The overload cut-out trips under the following
conditions:
In the case of moderate overload which
results in high internal temperatures with
increasing operation duration and then trips
the overload cut-out mentioned above. This
reduces the output voltage and the under
voltage cut-out trips.
The unit is equipped with internal short-cir-
cuit monitoring. As soon as a preset value
is reached, this cut-out trips and switches
off the unit without blowing fuses. Caution
is required in this case.
3.2.2 Overload protection and short-cir
cuit protection
Note that high currents flow over the units due
to the device-specific high power although
they only produce a voltage of 12 V.
Strictly ensure that the power of the consu-
mers connected to the respective output com-
plies with the requirements under point 3.2.4.
Changes to the installation must only be per-
formed by authorised specialists in agreement
with the vehicle manufacturer.
