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TROUBLESHOOTING & REPAIR
F-59 F-59
COMMANDER 300
WARNING
CURRENT BALANCE 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 troubleshoot-
ing assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will determine if there is a balance current between the IGBT modules and can also
eliminate intermittent lack of output problems. This test to be performed on machine codes
10469 and 10470 only.
MATERIALS NEEDED
3/8" Wrench
5/16” Nut Driver
Wire Cutters
This procedure should take approximately 30 minutes to perform.