Lincoln Electric SVM141-A User Manual

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.

The high frequency “spark” is pre-
sent at the tungsten electrode, but
the operator is unable to establish
a welding arc.  The machine has
normal open circuit voltage.  Refer
to 

Technical Specifications in the

Installation section.

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, reduce the
percentage of helium.

6.  Check the welding cables for

loose or faulty connections.

1.  Check spark gap adjustment.

Maintenance section.

2.  This may be a welding proce-

dure problem.

Contact the Lincoln Service
Department (216) 383-2531 or
1-800-833-9353 (WELD).

When  AC  TIG welding, the arc is
erratic and there is a loss of “clean-
ing” of the work piece.

1.  The tungsten electrode may be

small for the process.  Use a
larger diameter tungsten or a
pure tungsten.

2.  If a helium blend is used as a

shielding gas, reduce the per-
centage of helium.

1.  Check components R5 and C6

in the high voltage transformer
primary circuit.

2.  Perform the