13
Operation
Fig. 1
The Dometic surge voltage protection (OVP
unit, Fig. 1) is installed upstream of the trans-
former. It disconnects the supply line if the
input voltage exceeds approx. 270 V~.
Connected equipment is protected.
A red LED (1) indicates that a surge voltage
was present.
The Dometic surge voltage protection resets
itself automatically when the voltage has rea-
ched a normal level again. The LED is still lit 20
to 30 minutes after the voltage has reached a
safe level again.
3.2.3 Surge voltage protection
The power units can be fitted with different
fuses.
It must be strictly ensured during the installati-
on that the power taken off at the individual
fuses is maximum 75% of the rated value of
the respective fuse. Higher outputs can result
in overheating and damage due to the higher
current.
A defective fuse usually means a short-circuit
or an overload of the 12 V output. This is indi-
cated by a red LED lighting next to the fuse
(see Fig. 2) if a consumer is connected.
A defective fuse in the fuse holder is also only
indicated when a consumer is connected. In
the case of a defective fuse, attempt to locali-
se the cause in the 12 V power circuit and rec-
tify if possible.
Switch off the AC/DC converter or disconnect
the device from the 230 V AC power supply
3.2.4 Fuses
No current supply to 230 V and 12 V
mains operation; the green LED does not
light up.
a. Check whether power has been discon-
nected; restore connection, if necessary.
Check whether the automatic cut-out has
been activated.
3.3 Measures in case of mal-
functions
1
1
No current supply to the 12 V mains ope-
ration.
a. Check the 12 volt plug-in fuses: faulty
fuses are indicated by the red LED.
If necessary, replace the fuses by new
fuses of the same type and the same
current intensity.
b. Check whether the unit has switched off
because of overheating: the green LED
does not light up. Switch off the unit and
wait at least 2 minutes before restarting it.
2
No current supply to the 12 V outputs by
battery operation.
a. Check the 12 volt plug-in fuses: faulty
fuses are indicated by the red LED. If
necessary, replace the fuses by new fuses
of the same type and the same current
intensity.
b. Check the battery and its connection to
the converter.
3
before replacing the fuse. Only replace a
defective fuse with a new fuse of the ATO type
LITTLEFUSE.
Switch on the unit again (see Fig. 4). If the fuse
trips again, contact a service partner for
Dometic AC/DC converters.
