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• Use qualified wire, no using inferior or rusty wire.
• Clean the dust of liner with compressed air after the welder using some time (the dust is accumulated by friction between wire
and liner roll if find it wear and tear to prevent wire uneven feeding.
• The pressed roll can not be pressed too firm to guarantee smooth wire feeding. (It will lead to wire deformation, adding the
feeding resistance and accelerating the friction of gear if pressed over firmly.)
warning
• The main loop voltage happens to be a bit higher, so safety precaution should be taken before repair to avoid acci-
dental shock. The untrained people are forbidden to open the case!
• Power source needs to be cut off before dust removal.
• Never tamper with wire or damage the component parts when cleaning.
6. basic troubleshooting
NUM.
breakdown
1
Yellow Indicator is ON
2
Wire feeding motor don't work
Cooling fan not working or turning
3
very slowly
4
Arc is not stable and splash is large
5
Arc can't be pilot
Analysis
Voltage is too high (≥15%)
Voltage is too low (≤15%)
Bad power ventilation lead to over-heat
protection
Circumstance temperature is too high
Using over the rated duty-cycle
Potentiometer not in the proper status
Nozzle is blocked up
Feed roller is loosen
Switch broken
Fan broken
Wire broken or falling off
Too large contact tip makes the current
unsteady
Too thin power cable makes the
power astaticism
Too low input voltage
Wire feeding resistance is too large
Grounding cable
The workpiece has a lot of grease
Dirt or rust stains
15
solutions
Switch off power source; Check the
main supply; Restart welder when
power recovers to normal state
Improve the ventilation condition
It will automatically temperature low
down
It will automatically recover when
the temperature low down
Change potentiometer
Change nozzle
Firm the bolts
Replace the switch
Replace or repair the fan
Check the connection
Change the proper contact tip or
roller
Change the power cable
Enhance the input voltage
Clean or replace the liner and the
torch cable had better in the line
direction
Connect grounding cable
Clean grease, dirt or rust stains
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