54
Troubleshooting
Safety
WARNING!
Risk of electric shock.
This can result in serious injury and damage to property. Before opening the device:
► Turn the power source mains switch to the "O" position
► Disconnect the power source from the mains
► Attach a clearly legible and easy-to-understand warning sign to prevent anyone switch-
ing it on again
► After opening the device, discharge any live components (e.g. capacitors).
Other faults
Power source does not function
Mains switch is ON, but indicators are not lit up
Cause: there is a fault in the mains lead; the mains plug is not plugged in
Remedy: check mains lead, check mains voltage if necessary
Cause: mains fuse is faulty
Remedy: replace mains fuse
Cause: mains outlet socket or plug is faulty
Remedy: replace faulty components
Cause: mains switch is faulty
Remedy: replace mains switch
Cause: phase conductors (L1, L2, L3) connected incorrectly
Remedy: connect phase conductors as described
Mains fuse or automatic circuit breaker has tripped
Cause: Mains fuse underrated
Remedy: Rate mains lead fuse according to rating plate
Cause: Short circuit on the transformer windings
Remedy: Replace the auto-transformer
Cause: Auto-transformer not connected correctly
Remedy: Correct the mains connection
Output voltage too low
Cause: Incorrect mains voltage
Remedy: Check the mains voltage
Cause: Mains leads are connected incorrectly
Remedy: Correct mains connection
Cause: L1/L2/L3 swapped with N-conductor
Remedy: Correct the mains connection
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