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EXCITER VOLTAGE FEEDBACK 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 the exciter voltage module is reading each exciter phase
voltage back to the control board accurately. An inaccurate reading 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
None
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TROUBLESHOOTING & REPAIR
WARNING
This procedure takes approximately 20 minutes to perform.
F-63 F-63
COMMANDER 400