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TROUBLESHOOTING & REPAIR
CAPACITOR DISCHARGE PROCEDURE
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 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 trou- bleshooting assistance before you proceed. Call
PURPOSE FOR THE PROCEDURE
This procedure will drain off any charge stored in the four large capacitors that are part of the FET or IGBT switch board assembly. This procedure MUST be performed, as a safety pre- caution, before conducting any test or repair procedure that requires you to touch internal components of the machine.
MATERIALS NEEDED
Volt/Ohmmeter (Multimeter) 5/16" Nut driver
3/8" Nut driver Insulated gloves
Jumper wire with insulated leads and
Piece of glastic board or similar insulating materials on which to secure the resistor
This procedure takes approximately 25 minutes to perform.
