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SKU 91146 For technical questions, please call 1-800-444-3353. PAGE 22
TROUBLESHOOTING GUIDE - WELDING GUN & WIRE DRIVE
Problem Possible Cause
No arc. 1. Interruption of welding power circuit to welding
gun or workpiece.
2. Power source or control defective.
3. Trigger wire broken, cut, or disconnected.
4. Power source contractor not activated.
Arc between gas nozzle
and workpiece.
1. Spatter build-up inside gas nozzle.
Welding gun body or
power cable overheated.
1. Welding current too high.
2. Contact tip not correctly tightened.
3. Ground clamp making poor contact.
Welding wire melted
onto contact tip.
4. Wire feed starts too late (burn-back).
5. Wire jammed in liner due to dirt accumulation
in liner or extreme bending of cable assembly.
6. Feed rate too low.
7. Contact tip too far away from workpiece.
8. Burn-back time set too long.
Irregular wire feed. 9. Drive roll pressure too low or too high.
10. Faulty or worn liner.
11. Incorrect type or size of liner, or liner
incorrectly attached.
12. Faulty wire feed control.
13. Drive rolls worn or incorrectly installed. Incorrect
Size of drive rolls used.
INSPECTION, MAINTENANCE, AND CLEANING - WELDING MACHINE
1. WARNING! Make sure the Power Switch (10) is in its “OFF” position.
Unplug the Power Cord Plug from its electrical outlet, and allow the Welder to
completely cool before performing any inspection, maintenance, or cleaning
procedures. Note: Always ground the contact tip to insure that there is no
residual energy in the Welder.
2. Before each use, inspect the general condition of the Welder. Check for
damaged electrical wiring, loose connections, cracked, burnt, or broken parts,
and any other condition that may affect its safe operation. If abnormal noise or
vibration occurs, have the problem corrected before further use.
Do not use damaged equipment.
3. Every six months: Blow off or vacuum dirt and dust deposits on the Auxiliary
Transformer (23) and other components. Dirt or dust deposits on the Welding
Transformer and other internal components may reduce the insulating property or
cause overheated Transformer. During heavy usage, clean monthly.