15.
Remove the 18 retaining screws (T30) on the IGBT input terminals. Note snubber ca-
pacitors come off when screws are removed. There are 6 screws for each IGBT module.
16.
Remove the 2 retaining nuts (8 mm) connecting each IGBT-cap bus bar assembly to the
IGBT-Ind bus bar assembly and remove the IGBT-cap bus bar assembly. There are three
IGBT-cap bus bar assemblies.
17.
Remove the retaining nut (8 mm) from the high frequency board.
18.
Remove the 2 retaining screws (T25) from the high frequency board.
19.
Disconnect the wire assembly from the high frequency board and remove the board.
20.
If the unit has Brake IGBTs, remove the 4 retaining screws (T30) connecting the IGBT-
Ind bus bar assembly to the Brake IGBT. Note that there are 2 screws per Brake IGBT
module.
21.
Remove the 4 retaining nuts (13 mm) connecting the IGBT-Ind bus bar assembly to two
DC bus bars from the inductor. Remove the IGBT-Ind bus bar assembly.
22.
Remove the 8 retaining screws (T25) mounting each IGBT module.
130BX131.10
1
2
3
4
5
6
7
8
9
10
11
Figure 8.17: IGBT Modules (4 of 4)
1
Snubber capacitor
7
Retaining screw (Step 16)
2
Retaining screw (Brake IGBT option) (Step 20)
8
Retaining screw (Step 15)
3
Retaining nut (Step 17)
9
IGBT-Cap bus bar BB47
4
Retaining nut (Step 21)
10
IGBT board
5
High Frequency board
11
IGBT retaining screw (Step 22)
6
Retaining screw (Step 18)
High Power Service Manual for VLT
®
FC Series
Adjustable Frequency Drives
8 E-Frame Sizes Disassembly and Assembly
Instructions
MG.90.L1.22 - VLT
®
is a registered Danfoss trademark
8-19
8
Summary of Contents for VLT HVAC FC 100
Page 219: ......