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TROUBLESHOOTING & REPAIR | |||
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MAIN INVERTER BOARD RESISTANCE 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 test will determine if the main inverter board has any “shorted” or “leaky” power diodes or Insulated Gate Bipolar Transistors IGBT’s. Also it will indicate if P1 is “shorted” or “open”.
MATERIALS NEEDED
Analog Volt/Ohmmeter
Wiring Diagram
7mm Nut Driver
4mm Allen Wrench
Crescent Wrench
