13.2.22 IGBTs
There are 6 IGBT modules in E1h–E4h drives, 2 for each phase. If the brake option is present, there are 2 brake IGBT
modules as well. To remove the IGBT modules, use the following steps. Refer to Illustration 13.28.
Disassembly in E1h/E3h drives
1. Remove input plate. Refer to chapter 13.2.9 Input
Plate with Busbars and chapter 13.2.10 Split Input
Plate with Options.
2. Remove the gate drive card mounting plate. Refer
to chapter 13.2.13 Gate Drive Card Mounting Plate.
3. Remove the DC capacitor plates and insulator
sheets. See chapter 13.2.20 Twistlock DC
Capacitors.
4. Remove the optional horizontal brake busbars, if
present. Refer to chapter 13.2.26 Horizontal Brake
Busbars.
5. Remove the Y-shaped busbars:
5a Remove 12 screws (T30), 4 from each Y-
shaped busbar.
5b Remove 3 screws (T25), 1 from the
center of each Y-shaped busbar.
5c Remove the Y-shaped busbars from the
drive.
6. Disconnect 2 cables from the IGBT. Disconnect 1
cable from the brake IGBT, if brake is present.
7. Remove 7 screws (T25) from each plastic IGBT
mounting frame.
8. Pull the plastic IGBT mounting frame from the
drive.
9. Remove 4 screws (T25) from each IGBT or brake
IGBT. The number of fasteners can vary with the
drive.
Reassembly in E1h/E3h drives
For reassembly, use the IGBT spare part instructions that
come with the parts kit.
Disassembly in E2h/E4h drives
1. Remove the DC capacitor plates and insulator
sheets. See chapter 13.2.20 Twistlock DC
Capacitors.
2. Remove the optional horizontal brake busbars, if
present. Refer to chapter 13.2.26 Horizontal Brake
Busbars.
3. Disconnect 2 cables from the IGBT module.
4. Disconnect 1 cable from the brake IGBT module,
if brake is present.
5. Remove 6 screws (T25) from each IGBT mounting
frame. Remove the IGBT mounting frame from
the drive.
6. Remove 10 screws (T25) from each IGBT or brake
IGBT. Remove the IGBT module from the drive.
Reassembly in E2h/E4h drives
For reassembly, use the IGBT spare part instructions that
come with the parts kit.
E1h–E4h Drive Disassembly a... Service Guide
MG94A502 Danfoss A/S © 02/2019 All rights reserved. 305
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