J. FAULT FINDING
Check points in case of Abnormal Operation
Fault Possible Cause Rectification
Control Fuse is blown Replace with the rated fuse 1. Welding is
automatically
stopped, and the
“INDICATOR WARN”
lamp is ON
The Duty Cycle or welding
current are higher than
specified limits.
Wait and allow the Cooling Fan
to rotate. Keep the Fan running
more than 10 minutes after the
abnormal Indication Lamp is
turned OFF, and do not start the
welding. While restarting
welding, lower the welding
current or duty cycle. Avoid the
welding operation while
indicator Lamp “WARN” is
repeatedly ON.
Power Switch is in OFF position Turn the power ON.
Single phase Operation Check Fuses, power switch in
the switch box.
The set value of the welding
current at Remote Control unit
is in the lowest.
Increase current value by
turning clockwise the current
adjustment knob.
The Motor fuse is blown. Replace fuses with the rated
ones.
Disconnection of the Wire
Feeder’s control cable or
imperfect contact of the
connector.
Check for continuity using a
multimeter. Machine has to be
kept switched OFF during
continuity test
2. Wire does not feed
even pressing the
Torch Switch
Fault of the Control PCB /
Crater PCB
Replace Control PCB / Crater
PCB
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