16
Troubleshooting
WARNING! An electric shock can be fatal. Before carrying out any work on the
plasma torch:
- Switch the power source and plasma device mains switch to the „O“
position
- Disconnect power source and plasma device from the mains
- Put up an easy-to-understand warning sign to stop anybody inadvertently
switching it back on again
Safety
Troubleshooting
Pilot arc not igniting
Cause: Tungsten electrode missing
Remedy: Insert tungsten electrode
Cause: Plasma nozzle and tungsten electrode too far apart
Remedy: Position tungsten electrode correctly
Cause: Plasma nozzle and tungsten electrode touching or too close (short circuit
between plasma nozzle and tungsten electrode)
Remedy: Position tungsten electrode correctly
Copper droplets on the plasma nozzle after a brief period of welding
Droplet formation on the plasma nozzle is a sign that the plasma nozzle has been badly
damaged: due to excessive heat, the copper contained in the plasma nozzle is melting
and leaking out.
Cause: Loading values too high
Remedy: Replace plasma nozzle, reduce load
Increased plasma nozzle wear
Cause: Insufficient cooling
Remedy: Check the cooling circuit, increase the plasma gas flow, check for wear on
the nozzle connection
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