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Handling general failures
Electrical tools
• When an electrical tool will not switch on or only
runs for a short time switch the power inverter on
and off several times while the electrical tool is
switched on.
Television sets
• The power inverter is shielded and puts out a
filtered sine wave.
With the reception of, for example, very weak
television stations it can, nevertheless, result in
interferences and/or image breakdown.
• In this case position the power inverter as far
away as possible from the television, antenna
cable and antenna.
• Reposition the power inverter, television, antenna
cable and antenna until reception improves.
• If possible use a high quality, shielded antenna
cable.
Audio systems
• Some audio/video systems issue a buzzing tone
through the speaker when they are being operated
via the power inverter. The reason for this is that
these devices can not filter the modified sine
wave of the power inverter and this is not a
defect in the power inverter.
Troubleshooting
Low output voltage
Possible cause and remedy:
• The power inverter is overloaded. Reduce the
load until you no longer exceed the maximum
load as specified in the technical data.
• The input voltage is below 11 V. Maintain the in-
put voltage of the power inverter above 11 V
to keep the output voltage constant.
Low battery voltage signal sounds
continually
Possible cause and remedy:
• The battery is defective. Replace the battery.
• Insufficient voltage or power supply. Check the
condition of the in vehicle receptacle and the
12 V vehicle plug
and if necessary clean these.
No output power
Possible cause and remedy:
• The power inverter is not fully warmed up.
Switch the power inverter on and off again until
the device attached to the power inverter is
supplied with power. Repeat this process in order
to switch the device on.
• The ignition must be switched on for the in vehicle
receptacle to be supplied with power. Switch the
ignition on and/or in the position I.
• The power inverter is overloaded. Reduce the
load until you no longer exceed the maximum
load as specified in the technical data.
• The power inverter is overheated. Wait until the
device has cooled down. Ensure that there is
sufficient ventilation space. Make sure that the
connected load does not continually exceed the
maximum load, in order to avoid overheating
again.
• The device fuse is burnt out. Consult the service
department in order to put the device back into
working condition. Make sure that the power in-
verter is connected to the power supply with the
correct polarity.
• The cable fuse is burnt out. Change the cable
fuse as described in the chapter "Changing the
cable fuse".
Make sure that the power inverter is connected
to the power supply with the correct polarity.
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IB_KH3905_BK46498_LB6_GB.qxd 08.03.2010 12:42 Uhr Seite 8
