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TROUBLESHOOTING & REPAIR
F-6
IDEALARC DC-1000
Observe all Safety Guidelines detailed throughout 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.
OUTPUT PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
Machine input contactor operates
but machine has no weld output.
Fan runs and pilot light glows.
1. Install a jumper from #2 to #4
on machine terminal strip. If
machine weld output is
restored, the problem is in the
wire feeder or control cable.
2. If remote control is not being
used, make certain the output
control switch (SW3) is in the
“OUTPUT CONTROL AT DC
1000” position.
3. Check 8 AMP fuse in the front
panel. Replace if blown.
4. Check for loose or faulty weld
cable connections.
1. Check operation of output
pilot relay (4CR). There
should be 115 VAC present
on leads #31 and #4 at (4CR)
when #2 and #4 are jumpered
together at the terminal strip.
a. If the correct voltage is pre-
sent and the relay does not
activate, the relay may be
faulty - Replace.
b. If the 115 VAC is missing,
check the associated wiring
for loose or faulty connec-
tions. See wiring diagram.
2. Check the output control
potentiometer (R1) and asso-
ciated circuitry for loose or
faulty connections. See wiring
diagram.
3. Perform
Main Transformer
Test
4. Perform
Firing Board Test
.
5. Perform
Control Board Test
.
6. Perform
SCR Output Bridge
Test
.
CAUTION
F-6