Lincoln Electric PRECISION TIG SVM186-A Service Manual page 48

F-8
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
Machine output is intermittently
lost. Gas flow and high frequency
are also interrupted.
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 problem may be caused by
high frequency interference.
Make sure that the machine is
grounded properly according to
the installation instructions. If
there are other high frequency
sources in the area, make cer-
tain that they are grounded
properly.
2. Make sure the Amptrol is operat-
ing properly.
3. Check to make sure that the
input voltage is correct for the
machine reconnect configura-
tion. Refer to Reconnect
Procedure in the Installation
section of this manual.
CAUTION
PRECISION TIG® 225
RECOMMENDED
COURSE OF ACTION
1. Check for loose or faulty con-
nection on the leads between
the remote receptacle and plug
J5 on the control board. See
wiring diagram.
2. Check the plugs on the control
board for loose connections.
3. The control board may be
faulty.
F-8