Troubleshooting & repair, Caution – Lincoln Electric IDEALARC DC 1000 SVM123-A User Manual
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F-10
TROUBLESHOOTING & REPAIR
F-10
IDEALARC DC-1000
Observe all Safety Guidelines detailed througout this manual
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 216-383-2531 or 1-800-833-9353.
FUNCTION PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
The weld output terminals are
always electrically “hot”.
1. Remove any external leads
hooked to #2 and #4 on the
terminal strip. If the problem
disappears, the fault is in the
control cable or wire feeder.
2. If some open circuit voltage is
present (over 3 VDC.) after
performing Step #1, then the
problem is within the DC-
1000.
1. Check for an internal short
between leads #2 and #4. See
wiring diagram.
2. The Pilot Relay (4CR) may be
stuck closed. Check or
replace.
3. Perform
4. Perform
5. Perform the
6. The SCR Snubber(s) may be
“leaky”. Check or replace. See
wiring diagram.
CAUTION