40
SECTION 6 TROUBLESHOOTING
Problem Possible Cause Action
LED 6 – (red) Right Over Cur-
rent
Note:
If operation at 275A or less is
possible, then the LEFT side is
not working.
Cutting at over 275A with a faulty left side
(left side output = 0)
See faulty left or right side
Right current transducer connector loose
or unplugged. PCB loose.
Secure connections
Loose or unplugged connector at right
PWM/Drive Printed circuit board.
Secure connection
P2 at left of PWM / Drive PCB loose or un-
plugged.
Secure connection
Check voltage between P7-6 and P7-7. A
voltage in either polarity of greater than
0.01 V indicates a faulty right current trans-
ducer (TD2).
Replace right current transducer
(TD2)
Faulty PCB1 Replace PCB1 P/N
0558038287
Faulty right PWM / Drive PCB
Replace right PWM / Drive PCB P/N
0558038308
LED 9 – (red) Left Over Current
Note:
If operation at 275A or less is
possible, then the Right side is
not working.
Cutting at over 275A with a faulty right side
(right side output = 0)
See faulty right side
Left current transducer connector loose or
unplugged. PCB loose.
Secure connections
Loose or unplugged connector at left PWM
/ Drive Printed circuit board.
Secure connection
P2 at right of PWM / Drive PCB loose or
unplugged.
Secure connection
Check voltage between P7-2 and P7-3. A
voltage in either polarity of greater than
0.01 V indicates a faulty left current trans-
ducer (TD1).
Replace left current transducer (TD1)
Faulty PCB1 Replace PCB1 P/N
0558038287
Faulty left PWM / Drive PCB
Replace left PWM / Drive PCB P/N
0558038308
NEVER attempt to power-up or operate the power source with any
Gate / Emitter IGBT Plug disconnected from it’s PWM / Gate Drive
Board. Attempting to operate the power source with any open (un-
plugged) IGBT Gate / Emitter Connector may damage the IGBT and
the plasma cutting torch.
CAUTION
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