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EXCITER CAPACITOR BANK 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
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
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will determine whether there are any bad capacitors in the exciter capacitor bank.
Low capacitance in the bank can cause lack of full weld output and can cause the control
board to shut down the machine with an “ECH” or “ECL” error code when operating the
machine at high currents.
MATERIALS NEEDED
Refer to “Case Cover Removal” section for tools needed to remove side panels.
Capacitance Meter
7/16” Nut Driver
Crescent Wrench
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TROUBLESHOOTING & REPAIR
WARNING
This procedure takes approximately 35 minutes to perform.
F-65 F-65
COMMANDER 400