Igbt Modules - Danfoss VLT HVAC Drive FC 100 Service Manual

8 E-Frame Sizes Disassembly and Assembly
Instructions

8.2.13 IGBT Modules

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Figure 8.14: IGBT Modules (1 of 4)
1 Retaining nuts (Step 7)
2 Wire retaining nut on bus bar BB41 (Step 3) 4 Wire retaining nuts for output bus bars BB42 (Steps 5 & 6)
8-16
Remove both DC capacitor banks in accordance with the procedure.
Remove the input terminal plate in accordance with procedure.
Remove the wire retaining nut (10 mm) from each of the 3 SCR input bus bars.
Note color coding for each of the 3 wires attached to the retaining studs. Ensure that the
correct wire is attached to the applicable stud upon reassembly. Remove the wiring from
the studs.
Remove the wire retaining nut (8 mm) from the SCR output bus bars. One from the (+)
DC bus bar and one from the (–) DC bus bar.
Note color coding for each wire attached to the retaining studs. Ensure that the correct
wire is attached to the applicable stud upon reassembly. Remove the wiring from the
studs.
Remove the 4 retaining nuts (13 mm) on the side of the bus bars, 2 on each bus bar.
MG.90.L1.22 - VLT
High Power Service Manual for VLT
3 IGBT board
® is a registered Danfoss trademark
®
FC Series
Adjustable Frequency Drives
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4