ESAB 35609, Installation, Operation And Maintenance Manual

Page: 44 / 120

SECTION 6 Troubleshooting
ESP 400C and 600C Plasma Power Sources 6-6
Problem Possible Cause Action
LED 6 – (red) Right Over Current
Note:
If operation at 250A or less is
possible, then the LEFT side is
not working. Output current of the right side
exceeds 200A because of operating
the power source over 400A.
Cutting at over 250A 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
unplugged.
Check voltage between P7-6 and
P7-7. A voltage in either polarity of
greater than 0.01 V indicates a faulty
right current transducer (TD2).
Faulty PCB1
Faulty right PWM/Drive PCB
Turn the output current down to
400A
See faulty left or right side
Secure connections
Secure connection
Secure connection
Replace right current transducer
(TD2)
Replace PCB1 P/N 30832
Replace right PWM/Drive PCB P/N
38030
LED 6 – (red) Left Over Current
Note:
If operation at 250A or less is
possible, then the Right side is
not working.
Output current of the left side
exceeds 250A because of operating
the power source over 400.
Cutting at over 250A 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 transducer (TD1).
Faulty PCB1
Faulty left PWM/Drive PCB
Turn the output current down to
400A
See faulty right side
Secure connections
Secure connection
Secure connection
Replace left current transducer (TD1)
Replace PCB1 P/N 38032
Replace left PWM/Drive PCB P/N
38030