Lincoln Electric PRECISION TIG SVM186-A Service Manual page 51

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Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
High frequency "spark" is present
at tungsten electrode, but operator
is unable to establish a welding
arc. Machine has normal open cir-
cuit voltage. Refer to Technical
Specifications in the Installation
Chapter.
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)
OUTPUT PROBLEMS
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
sharpen.
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.
CAUTION
PRECISION TIG® 225
RECOMMENDED
COURSE OF ACTION
1. This may be a welding proce-
dure problem.
Contact The Lincoln Electric
Service Department 1-888-935-
3877.
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