WARNING! An electric shock can be fatal. Before opening up the machine
- Move the mains switch to the “O” position
- Unplug machine from the mains
- Put up an easy-to-understand warning sign to stop anybody inadvertently
switching it back on again
- Using a suitable measuring instrument, check to make sure that electri-
cally charged components (e.g. capacitors) have been discharged
CAUTION! Inadequate PE conductor connections can cause serious injury
and damage. The housing screws provide a suitable PE conductor connection
for earthing (grounding) the housing and must NOT be replaced by any other
screws that do not provide a reliable PE conductor connection.
General remarks
At some points the arc does not penetrate the workpiece completely
The cutting current is set to its maximum value
Cause: Cutting speed too fast or distance from workpiece too great
Remedy: Reduce cutting speed or distance from workpiece
Cause: Wearing parts are worn excessively
Remedy: Replace wearing parts
Cause: Poor earth connection
Remedy: Check contact between earth terminal and workpiece
Poor cutting performance
Cause: Cutting current too low or distance from workpiece too great
Remedy: Increase cutting current or reduce distance from workpiece
Cause: Poor earth connection
Remedy: Check contact between earth terminal and workpiece
Cause: Very long mains lead extension
Remedy: Use shorter mains lead extension
Arc breaks during cutting
Cause: Poor earth connection
Remedy: Check contact between earth terminal and workpiece
Cause: Wearing parts are worn excessively
Remedy: Replace wearing parts
Cause: Very long mains lead extension
Remedy: Use shorter mains lead extension
Cause: Insufficient generator output
Remedy: Use more powerful generator
Fault diagnosis
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