20
Troubleshooting
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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