Lincoln Electric IDEALARC DC 1000 SVM123-A Service Manual page 63

F-23
15. Test the Output Pilot Relay (4CR)
for operation by removing and
replacing the jumper wire repeat-
edly from terminal #2. See Figure
F.7. This should cause the relay
contacts to open and close. The
contacts can be seen closing and
opening through the clear plastic
relay case or can be heard opening
TROUBLESHOOTING & REPAIR
FIRING BOARD TEST
FIGURE F.8 - Output Pilot Relay 4CR Location
IDEALARC DC-1000
and closing. If the Output Pilot
Relay (4CR) does not close when
energized, check for loose or faulty
wiring. See Wiring Diagram and
Figure F-8.
16. Replace the Firing Board if the
above voltage and control relay
tests are passed. It may be faulty.
F-23