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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
Firing Board Test
.
4. Perform
Control Board Test
.
5. Perform the
SCR Output
Bridge Test
.
6. The SCR Snubber(s) may be
“leaky”. Check or replace. See
wiring diagram.
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CAUTION