TROUBLESHOO
TING
44
MIG 140 INVERTER WELDER 058-9305-6
Troubleshooting
The following chart lists common issues and solutions. Please read it carefully and follow all
instructions closely.
WARNING!
Potential hazard that could result in serious injury or loss of life.
•
If any of the following symptoms appears while the welder is in use, turn it off
and disconnect it from the power supply immediately. Failure to heed this
warning will result in serious personal injury or loss of life.
•
Repairs must be performed by a qualified service technician only.
PROBLEM
POSSIBLE CAUSES
SOLUTIONS
The thermal overload
indicator glows.
1. Voltage is too high (
15%).
2. Voltage is too low (
15%).
3. Ventilation is poor, leading to
activation of thermal over
load
protection.
4. Circumstantial temperature is too
high.
5. The welder is used over the rated
duty
-
cycle.
1. Turn the power supply OFF and check the
power source. Restart the welder when power
supply returns to normal state.
2. Turn the power supply OFF and check the
power source. Restart the welder when power
supply returns to normal state.
3. Make sure the welder is placed in a properly
ventilated area.
4. The welder will automatically recover when
the temperature lowers.
5. The welder will automatically recover when
the temperature lowers.
The wire feeding
motor does not work.
1. The potentiometer is damaged.
2. The welding nozzle is blocked.
3. Loose connection of feed roller.
1. Change the potentiometer.
2. Change the nozzle.
3. Tighten the feed roller bolts.
Cooling fan is turning
very slowly or does
not work.
1. The cooling fan switch is broken.
2. The cooling fan is broken.
3. Wire connection is not proper.
1. Replace the switch.
2. Replace or repair the fan.
3. Check the wire connection.