Lincoln Electric SQUARE WAVE TIG 355 Service Manual page 65

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Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
Gas and/or water do not flow, even
though the gas and/or water LEDs
are lit.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
TROUBLESHOOTING AND REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
TIG MODE PROBLEMS
1. The machine must be in TIG
mode. The gas, water and high
frequency circuits do NOT func-
tion in Stick mode.
2. Check the gas and/or water sup-
plies for adequate pressure or
kinked or broken hoses.
CAUTION
SQUARE WAVE TIG 355
RECOMMENDED
COURSE OF ACTION
1. Check for proper operation of
the gas and/or water solenoids.
2. If 115VAC is applied to the sole-
noids, they should activate and
allow gas or water to flow.
3. If 115VAC is applied to the sole-
noids and they do NOT activate,
the solenoids may be faulty.
Replace.
4. Perform the Control Board
Test.
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