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TROUBLESHOOTING
Observe Safety Guidelines
detailed in the beginning of this manual.
Troubleshooting Guide
PROBLEMS
(SYMPTOMS)
Machine output is intermittently
lost. Gas flow and high frequency
are also interrupted.
Arc “Flutters” when TIG welding.
Lack of penetration in AC TIG
welding.
Black areas along weld bead.
Black areas along weld bead at or
near end of weld.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
1. Problem may be caused by
high frequency interference.
Make sure that the machine is
grounded properly according
to the installation instructions.
If there are other high
frequency sources in the area,
make certain that they are
grounded properly.
2. Check arc start switch or
amptrol for proper operation
and loose connections.
1. Tungsten electrode may be
too large in diameter.
2. Tungsten not “Sharp” when
welding in DC negative mode.
3. If helium is used as a
shielding gas, then reduce the
percentage of helium.
4. Adjust flow rate of shielding
gas.
5. Check hoses and connections
for leaks.
1. Manual balance control set
improperly - set to negative
10 (-10) for maximum
penetration.
1. Tungsten electrode may be
contaminated. Replace or
sharpen.
2. Shielding gas flow may be
insufficient.
3. Contaminated gas or faulty
gas line or torch.
1. Increase post flow time.
RECOMMENDED
COURSE OF ACTION
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.
TIG MODE PROBLEMS
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact your local Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION