Danfoss VLT FC Series Service Manual page 301

E1h–E4h Drive Disassembly a...
Disassembly for 525–690 V AC units
1. Remove the balance/high frequency card. Refer to
chapter 13.2.17 Balance/High Frequency Card.
2. Remove the DC snubber capacitors. See
chapter 13.2.19 DC Snubber Capacitors.
3. Remove 2 nuts (30 mm) from left DC bus rail
where it connects with the DC(+) bus plate.
4. Remove screws (T25) and any standoff (8 mm)
from the DC(+) bus plate. Number of fasteners
varies with drive size and power rating. Refer to
chapter 13.2.21 DC Capacitor Layouts.
5. Lift the DC(+) bus plate from the drive, and
remove the insulator sheet behind it.
6. Remove 2 nuts (30 mm) from right DC bus rail
where it connects with the DC(-) bus plate.
7. Remove screws (T20) and any standoff (8 mm)
from the DC(-) bus plate. Number of fasteners
varies with drive size and power rating. Refer to
chapter 13.2.21 DC Capacitor Layouts.
8. Lift the DC(-) bus plate from the drive, and
remove the insulator sheet behind it.
9. Remove screws (T20) from the upper and lower
midplates. Number of fasteners varies with drive
size and power rating. Refer to chapter 13.2.21 DC
Capacitor Layouts.
10. Lift the 2 midplates from the drive, and remove
the insulator sheet behind it.
11. To remove a DC capacitor, use the special tool
provided in the parts kit (or grip the edges with a
large pliers).
12. Turn the DC capacitor approximately 30 degrees
counterclockwise to release it. Pull the capacitor
out of the drive.
MG94A502
Service Guide
Reassembly for 525–690 V AC units
Tighten fasteners according to chapter 14.1 Fastener Torque
Ratings.
1.
2.
3.
4.
Danfoss A/S © 02/2019 All rights reserved.
Align the arrow on the rim of the DC capacitor
with the notch in the cutout hole, and insert it
into the drive.
Turn the DC capacitor clockwise approximately 30
degrees until it locks in place. Check that the
capacitor gasket is fully seated.
Replace the DC bus plates and insulator sheets in
reverse order, using the capacitor layout for the
specific drive. Refer to chapter 13.2.21 DC
Capacitor Layouts.
Replace any other components in reverse order of
removal.
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