MAINTENANCE
3-12 powermax30 Service Manual
Problem This may mean Cause Solution
The cut quality is poor
or the cut does not sever
the metal.
The consumables are
worn, there is a poor
work lead connection,
the output from the
power supply is too low,
or the power board is
producing low current.
• The consumables need
to be replaced.
• The work lead may be
damaged or not properly
connected to the work
piece.
• The amps adjustment
knob may be set too
low.
• The power board may
be faulty.
• Inspect the consumables
and replace if necessary.
• Inspect the work lead for
damage. Reposition it and
clean the work surface to
ensure good contact.
• Check the amps
adjustment knob setting. If
your input circuit is 120 V,
20 A; 120 V, 30 A; or 240
V, 20 A , turn the knob to
the highest setting.
The pilot arc extinguishes
when you move the
plasma arc off the work
piece while still pulling the
torch’s trigger.
The continuous pilot arc
feature is not working.
The power board or the
control board may be
faulty.
• Perform tests 2 and 3 to
verify that the power
board is functioning
properly. If the power
board is faulty, replace it.
Otherwise, replace the
control board.
Troubleshooting guide (continued)
Control Board LEDs
The Powermax30 control board (PCB1) has 4 diagnostic LEDs.
Control board
Ribbon cable
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