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IGBT MODULE
REMOVAL AND REPLACEMENT
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 troubleshoot-
ing assistance before you proceed. Call
1-888-935-3877
.
DESCRIPTION
The following procedure will aid the technician in the removal and replacement of the IGBT
module located in the lower tray assembly.
MATERIALS NEEDED
5/16" Nut driver
Phillips head screw driver
7/16" wrench
Needle nose pliers
1/2" Wrench
12mm Wrench
3/16" Allen type wrench
Dow Corning 340 Heat Sink Compound (Lincoln E1868).
Silicone Rubber RTV Coating (Lincoln E2861 or Dow 3140)
TROUBLESHOOTING & REPAIR
F-53 F-53
INVERTEC STT
WARNING
Note: Component locations and disassembly procedures may
vary slightly on STT II models