42
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 0558038312
Faulty right PWM / Drive PCB
Replace right PWM / Drive PCB P/N
0558038324
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 0558038312
Faulty left PWM / Drive PCB
Replace left PWM / Drive PCB P/N
0558038324
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
Содержание Plasmarc EPP-450
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