19
TROUBLESHOOTING
Problems
Possible Causes
Recommended Action
Improper control or feeding
Lincoln welding control or power supply
1. Check all fuses.
of welding wire.
is abnormal.
2. Check Lincoln control switch is
“on”and polarity switch on the
power supplies must be in “+” or “-“.
3. Review Lincoln service manuals
and diagnose possible PCBs
failures.
The indication light of the
1. Power supply is off.
1. Turn on power supply.
master control fails to ignite.
2. 3 pin control cable connector is
2. Check 3 pin connector.
loose.
3. 3 pin control cable is bad.
3. Check 3 pin control cable.
Flux vacuum cannot operate.
1. Bad vacuum relay in the control.
1. Replace control relay/switch.
2. Vacuum itself is faulty.
2. Replace flux vacuum.
Lamp is off.
1. Bad lighting relay in the control.
1. Replace relay/switch.
2. Control cable is loose or bad.
2. Check control cable & connector.
3. Light bulb is bad.
3. Replace light bulb.
Electric winch does not work. 1. Control cable is loose or bad.
1. Check control cable & connector.
2. Winch failure.
2. Replace winch.
Main frame cannot travel.
1. Bad travel direction switch.
1. Replace switch.
2. Bad speed potentiometer.
2. Replace potentiometer.
3. Bad travel control relay .
3. Replace relay.
4. Incorrect inverter setting.
4. Check inverter setting *
5. Faulty inverter.
5. Replace inverter
