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5. TROUBLESHOOTING
5.9
Other
Troubleshooting
Problem
Probable Cause
Remedy
Arc can not weld
Incomplete fusion
1. Not enough power phase
2. Too low welding voltage
1. Check power source
2. Select higher voltage range
No wire feed
1. Drive roll groove does not
line up with wire guide
2. Obstruction in wire guide
3. Drive roll pressure too high
4. Incorrect wire size
5. Obstruction in wire inlet
guide or contact tip
6. Dirty or bad quantity
welding wire
7. Press wire device pressure
too low
1. Aligning drive roll and wire
guide
2. Clear obstruction in wire
guide or replace it if
necessary
3. Readjust drive roll
pressure
4. Replace wire or wire guide
5. Clear obstruction in gun
contact tip or liner
6. Use good quantity welding
wire
7. Readjust screws
Excessive spatter
1. Wire feed speed too high
2. Contact tip damaged
1. Select lower wire feed
speed
2. Replace contact tip
Small cavities or holes
resulting from gas pockets in
weld metal
1. Insufficient shielding gas at
welding arc
2. Regulator/flowmeter
damaged
3. Contact tip damaged
4. Leakage, outside gas mix
with shielding gas
1. Increase flow of shielding
gas at regulator/flowmeter
2. Replace
regulator/flowmeter
3. Replace contact tip
4. Check gas hoses for leaks
Welding are not stable
1. Welding wire dirty
2. Bad contact of work clamp
3. Wrong size gun liner or
contact tip, or contact tip
worn
1. Use clean, dry welding wire
2. Connect work clamp to get
good to metal as contact
3. Replace contact tip
Low or unstable wire speed
1. Distorted welding wire
2. Obstruction in gun contact
tip or liner
1. Eliminate pickup of
distorted welding wire from
feeder or liner, or readjust
drive roll pressure
2. Replace contact tip or liner
No weld output
1. Main transformer
overheats, overheat
protection working
2. Fuse broken
3. Gun trigger damaged or
plug worn
1. Wait 15-30 mins for unit to
cool
2. Replace fuse
3. Replace gun trigger or plug
