Service and repair should be performed only by 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 1-888-935-3877.
TEST DESCRIPTION
This test will determine if there are undesirable electrical connections between the exciter
stator windings and chassis ground, or between individual windings within the exciter sta-
tor.
This test should be performed if flashing voltage is present at the rotor slip rings, rotor
resistance, the D1 field bridge rectifier, and all associated wiring are proven to be good,
but the exciter stator output voltage fails to build-up to normal levels, or is too high in one
or more of the windings.
MATERIALS NEEDED
Miscellaneous hand tools
Multimeter
EXCITER STATOR SHORT CIRCUIT & GROUND TEST PROCEDURE
TROUBLESHOOTING AND REPAIR
F-49 F-49
CLASSIC® 300D & 300G
WARNING
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