Lincoln Electric BesterMig 200-S Operator's Manual page 16

Troubleshooting
No. Problem
Yellow Thermal
1
Indicator is on
Wire feeding motor
2
not working
Cooling Fan not
3 working or turning
very slowly
Arc is not stable
4
and spatter is large
5
Arc will not start
6
No shielding gas
7
Others
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Possible Cause
Input voltage is too high (≥15%)
Input voltage is too low (≤15%)
Insufficient ventilation.
Ambient temperature is too high.
Exceeding the rated duty-cycle.
Potentiometer faulty
Nozzle is blocked.
Drive roll is loose.
Switch broken
Fan broken
Wire broken or disconnected
Too large contact tip makes the current
unsteady
Too thin power cable makes the power
unstable.
Too low input voltage
Wire feeding resistance is too large
Work cable broken
Work piece has greasy, dirty, rusty or painted
Torch is not connected properly.
Gas pipe is crimped or blocked.
Gas hose broken.
Recommended Course of Action
Switch off power source; Check the main
supply. Restart welder when power recovers
to normal state.
Improve the ventilation.
It will automatically recover
temperature reduces.
It will automatically recover
temperature reduces.
Change potentiometer.
Change nozzle.
Increase tension on drive roll.
Replace the switch.
Replace or repair the fan.
Check the connection.
Change to proper contact tip and / or drive
roll.
Change the power cable.
Correct the input voltage.
Clean or replace the liner and keep the gun
cable straight.
Connect / repair work cable.
Clean work piece, ensure good electrical
contact between work clamp and job.
Re-connect the torch.
Check gas system.
Repair or replace.
Please contact our Field Service Shop.
14
when the
when the
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