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PRECISION TIG 185
TROUBLESHOOTING & REPAIR
F-11 F-11
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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
1-888-935-3877.
TIG WELDING PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
High frequency "spark" is present at
tungsten electrode, but operator is
unable to establish a welding arc.
Machine has normal open circuit
voltage. Refer to Technical
Specifications in the Installation
Chapter.
1. The torch may be faulty. Check
or replace.
2. The current control may be set
too low.
3. The tungsten electrode may be
contaminated. Replace or sharp-
en.
4. The electrode may be too large
for the process.
5. If a helium blend is being used
as a shielding gas, then reduce
the percentage of helium.
6. Check the welding cables for
loose or faulty connections.
1. This may be a welding procedure
problem.
Contact The Lincoln Electric Service
Department 1-888-935-3877.