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TROUBLESHOOTING & REPAIR
MAIN INVERTER BOARD “UPFR” SECTION TEST
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 troubleshooting assistance before you proceed. Call
DESCRIPTION
This procedure will help determine if the UPFR section on the main board is functioning prop- erly.
MATERIALS NEEDED
Volt/Ohmmeter
Phillips Head Screwdriver
Wiring Diagram
