Lincoln Electric IDEALARC DC-1000 Service Manual page 58

F-24
15. Test the Output Pilot Relay (4CR) for operation
by removing and replacing the jumper wire
repeatedly 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 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.
TROUBLESHOOTING AND REPAIR
FIRING BOARD TEST (continued)
FIGURE F.8 – OUTPUT PILOT RELAY 4CR LOCATION
IDEALARC ® DC-1000
F-24