Igbt Modules D1/D3 Units - Danfoss VLT HVAC Drive FC 100 Service Manual

7 D-Frame Sizes Disassembly and Assembly
Instructions

7.2.17 IGBT Modules D1/D3 Units

1.
2.
3.
4.
5.
6.
7
7.
Figure 7.26: D1/D3 IGBT Module (1 of 2)
1 IGBT output bus bar BB9 (Step 7)
2 DC input bus bar assembly BB3 (Step 6A)
3 Retaining screw (Step 6)
4 High frequency card
5 Connector MK100 (Step 5)
7-28
Remove the control card cassette per instructions.
Remove the input terminal mounting plate per instructions.
Note the IGBT gate signal cables connected between the gate drive card connectors
MK100 (temperature sensor), MK102 (U), MK103 (V), and MK104 (W) and the IGBT
module connectors. These will need to be reconnected in the same locations during re-
assembly. Units with a brake option will have brake cabling from MK105 in addition.
Remove the capacitor bank per instructions.
Disconnect the gate drive cables at the connectors on the IGBT modules.
Disconnect the cable connected to connector MK100 on the high frequency card.
Remove the high frequency card by removing 2 retaining screws and 1 retaining nut.
6a For units with a brake option, the DC input bus assembly must be removed to
access and remove the bus bars between the IGBT bus bar assembly and the
brake IGBT. Remove the DC input bus bar assembly per steps 3–5 of SCR/Diode
Module Removal (D1 units).
6b For units with brake option, remove the bus bars between the IGBT bus bar
assembly and brake IGBT by removing two T25 retaining screws on brake IGBT
(not shown) and two 8 mm retaining nuts on the IGBT bus bar assembly (not
shown).
Remove the 3 IGBT output bus bars by removing the nut (10 mm) from the stud. Also
remove retaining screw (T30) at the other end of the IGBT output bus bars (not shown).
2
1
MG.90.L1.22 - VLT
High Power Service Manual for VLT
3 4
5
9
10
6 Retaining nut (Step 6)
7 Do not remove (Step 6)
8 Gate drive cable connectors (Steps 3 & 4)
9 IGBT module
10 IGBT output bus bar retaining nut (Step 7)
® is a registered Danfoss trademark
®
Adjustable Frequency Drives
6
7
8
FC Series