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TROUBLESHOOTING & REPAIR
F-11 F-11
SQUARE WAVE TIG 355
TROUBLESHOOTING GUIDE Observe Safety Guidelines
detailed in the beginning of this manual.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
216-383-2531 or 1-800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
TIG MODE PROBLEMS
Gas and/or water do not flow,
even though the gas and/or water
LEDs are lit.
1. The machine must be in TIG
mode. The gas, water and
high frequency circuits do NOT
function in Stick mode.
2. Check the gas and/or water
supplies for adequate pressure
or kinked or broken hoses.
1. Check for proper operation of
the gas and/or water sole-
noids.
2. If 115VAC is applied to the
solenoids, they should activate
and allow gas or water to flow.
3. If 115VAC is applied to the
solenoids and they do NOT
activate, the solenoids may be
faulty. Replace.
4. Perform the Control Board
Test.