Troubleshooting - Panasonic YC-400TX Manual

13. Troubleshooting

Abnormality
Power switch (MCB) has tripped out.
Power lamp does not turn on if power
switch is turned on.
Also, cooling fan does not rotate.
Water/Temp/Input warning lamp lights.
Input current warning lamp turns on.
Neither high frequency wave nor arc is
generated.
Arc is not generated
frequency voltage is generated.
Arc is not generated at stick welding.
Shielding gas does not flow.
Shielding gas keeps flowing and does
not stop.
Abnormality
Checking Point
Contact manufacturer's agent because circuit components may be
broken.
Power supply is not connected.
Fuse in switch box is blown.
Machine is operating at a current and duty cycle above the rated
value.
Flow of torch cooling water is insufficient.
Supply voltage is not suitable.
Supply voltage fluctuates extremely.
Contact manufacturer's agent in cases other than the above
because of possible main circuit trouble.
Welding process switch is set for stick welding
Torch switch input is not connected.
Welding use shielding gas is not flowing.
Base metal side cable is not connected or connection is not
While high
effective.
Distance between torch electrode and base metal is too long.
Welding process switch is not set at "STICK".
Torch select switch is not set at "AIR".
Welding gas hose is not connected to the machine.
The hose is kinked. . Gas valve is malfunctioning.
Gas check switch is set at "Check".
Gas post flow time is too long.
Gas valve malfunction
Checking point
20