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Malfunction
Possible cause
The mains power supply
Is the green power indicator (2) of the mains
does not work
power supply lit?
Check the mains voltage (you may also want to
check the mains fuse in the device or the line cir-
cuit breaker).
Connected consumers
Correct voltage set?
do not work
Correct polarity?
Overload of the mains power supply (display 7)?
Check the technical data of the consumers.
The output voltage of
The mains power supply has been switched to
13.8 V cannot be changed
the fixed voltage mode.
Change the position of the fixed voltage switch
underneath the device.
Periodically check the technical safety of the device, e.g. check for damage to the
housing etc.
Any other repair work must always be carried out by qualified
experts familiar with the hazards involved and with the relevant
regulations. Unauthorized modifications and repairs of or inside
the device lead to expiry of the warranty.