Lincoln Electric IDEALARC DC-600 Service Manual page 50

F-6
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
Machine input contactor operates
but machine has
output.Fan runs and pilot light
glows.
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. Install a jumper from #2 to #4 on
no weld machine
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
600" position.
3. Check 8AMP fuse in the front
panel.Replace if blown.
4. Check for loose or faulty weld
cable connections.
CAUTION
IDEALARC
1. Check operation of output pilot
terminal strip. If
2. Check the OUTPUT CON-
3. Perform Main Transformer
4. Perform Firing Board Test.
5. Perform Control Board Test.
6. Perform SCR Output Bridge
® DC-600
RECOMMENDED
COURSE OF ACTION
relay(CR4). There should be
115VAC present at leads #31
and #4 at (CR4) 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 115VAC is missing,
check the associated
wiring for loose or faulty
connections. See wiring
diagram.
TROL POTENTIOMETER (R1)
and associated circuitry for
loose or faulty connections.
See wiring diagram.
Test.
Test.
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