Perform the trigger circuit, And wiring harness test, Troubleshooting & repair – Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B User Manual

Page 179: Trigger circuit and wiring harness test, Warning

TRIGGER CIRCUIT AND WIRING HARNESS TEST

Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty. For your safety and to avoid elec-
trical shock, please observe all safety notes and precautions detailed throughout this manual.

If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical trou-
bleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).

TEST DESCRIPTION

This test will determine if there are any short circuits or other problems in the trigger circuit
wiring or if there are any faulty PC boards, which would cause the 5 amp circuit breaker to
trip repeatedly.

MATERIALS NEEDED

Volt/Ohmmeter (Multimeter)
5/16" Nut driver
3/8" Nut driver
Short piece of jumper wire
Auxiliary Transformer #1 Secondary Circuit Wiring Diagram – Figure F.44.

WARNING

TROUBLESHOOTING & REPAIR

F-119

POWER WAVE 450