Lincoln Electric IDEALARC DC-1500 Service Manual page 40

F-6
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
Machine input contactor oper-
ates but machine has no weld
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 machine terminal strip. If
machine
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 (SW4) is in the
"OUTPUT CONTROL AT DC
1500" position.
3. Check 8 AMP fuse in the front
panel. Replace if blown.
4. Check for loose or faulty weld
cable connections.
CAUTION
IDEALARC® DC-1500
1. Check operation of output
pilot relay (6CR). There
weld output is should be 115 VAC present
on leads #31 and #4 at (6CR)
when
jumpered together at the ter-
minal strip.
USE CAUTION AROUND
ROTATING LOWER FAN!!!
a. If the correct voltage is pre-
b. If the 115 VAC is missing,
2. Check the output control
potentiometer (R1) and asso-
ciated circuitry for loose or
faulty
wiring diagram.
3. Perform Main Transformer
Test
4. Perform Firing Board Test.
5. Perform
Test.
6. Perform SCR Output Bridge
Test.
RECOMMENDED
COURSE OF ACTION
#2 and #4 are
sent and the relay does not
activate, the relay may be
faulty - Replace.
check the associated wiring
for loose or faulty connec-
tions. See wiring diagram.
connections. See
Control Board
F-6