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TROUBLESHOOTING & REPAIR
F-13 F-13
IDEALARC R3R
INPUT CONTACTOR TEST
(FOR R3R 300 EQUIPPED WITH DC COIL ON INPUT CONTACTOR)
WARNING
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
electrical 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 216-383-2531 or 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if the input contactor is receiving the correct DC coil voltage
and if the contacts are functioning correctly.
MATERIALS NEEDED
Volt/Ohmmeter (Multimeter)
5/16” Nut driver
IDEALARC R3R Wiring Diagrams (See the Electrical Diagrams section of this manual.)
External 120VDC supply
This procedure takes approximately 20 minutes to perform.