ESAB Precision Plasmarc EPP-450 Manual De Instrucciones página 42

section 6
problem
LED 6 – (red) Right Over Cur-
rent
note:
If operation at 275A or less is
possible, then the LEFT side is
not working.
LED 9 – (red) Left Over Current
note:
If operation at 275A or less is
possible, then the Right side is
not working.
caution
possible cause
Cutting at over 275A with a faulty left side
(left side output = 0)
Right current transducer connector loose
or unplugged. PCB loose.
Loose or unplugged connector at right
PWM/Drive Printed circuit board.
P2 at left of PWM / Drive PCB loose or un-
plugged.
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).
Faulty PCB1
Faulty right PWM / Drive PCB
Cutting at over 275A with a faulty right side
(right side output = 0)
Left current transducer connector loose or
unplugged. PCB loose.
Loose or unplugged connector at left PWM
/ Drive Printed circuit board.
P2 at right of PWM / Drive PCB loose or
unplugged.
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).
Faulty PCB1
Faulty left PWM / Drive PCB
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.
See faulty left or right side
Secure connections
Secure connection
Secure connection
Replace right current transducer
(TD2)
Replace PCB1 P/N 0558038312
Replace right PWM / Drive PCB P/N
0558038324
See faulty right side
Secure connections
Secure connection
Secure connection
Replace left current transducer (TD1)
Replace PCB1 P/N 0558038312
Replace left PWM / Drive PCB P/N
0558038324
42
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