Lincoln Electric SQUARE WAVE TIG 255 IM520-B - Manual (Page 33)

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TROUBLESHOOTING
Observe Safety Guidelines
detailed in the beginning of this manual. Troubleshooting Guide
PROBLEMS
(SYMPTOMS)
No high frequency. Machine is in
the TIG Mode and has normal
output.
No gas or water flow when arc start
switch or amptrol is activated in the
TIG Mode. Machine has output -
fan runs. When toggling between
the Stick and TIG Modes a “Click”
can be heard indicating that the
solenoids are operating.
Arc rectification when AC TIG
welding.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
1. In order for the high frequency
to operate, the machine must
be either in the start only
Mode or the continuous high
frequency mode.
2. The high frequency spark gap
may be too large or shorted.
Check gap as per
maintenance instructions.
1. Gas supply is empty or not
turned on.
2. Gas or water hose may be
pinched.
3. Gas or water solenoid may be
blocked with dirt. Use filters
to prevent reoccurrence.
Consult your Local welder/gas
distributor.
1. Tungsten electrode may be
too small for process.
2. Manual balance control may
be misadjusted. Readjust to
the negative direction.
3. If helium gas is being used,
reduce percentage of helium.
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 WELDING 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