5.
Remove the SCR input bus bars in accordance
with
chapter 7.4.16 SCR Input Bus Bars
6.
Remove the brake IGBT by removing ten screws
(T25).
For reassembly, use the replacement IGBT instructions.
7.5 D6h Disassembly and Assembly
Instructions
7.5.1 Overview
The D8h is a D2h adjustable frequency drive with a larger
options cabinet. The unit profiled here includes a
contactor, disconnect and brake option, and is 690 V
power range. Some of the procedures here are applicable
to all options configurations but some may have slight
variations depending on the size of the unit, options
cabinet, and the selected options.
7.5.2 Removing the Heatsink Fan with
Options Cabinet Present
1
2
3
130BB816.10
Figure 7.26 Options Cabinet, Exploded View
1 Options cabinet to wall fastener
2 Options cabinet to frequency converter fastener
3 Heatsink fan access panel
Table 7.26 Legend to
1.
Remove the air baffle covering the interior
components.
2.
Remove the EMC shield by removing 2 screws
(T25).
3.
Remove the jumper bus bars between the main
enclosure and the options cabinet by removing 2
nuts (8 mm) at the bottom of the bus bars, one
per bus bar.
4.
Remove 2 screws (17 mm) from the top of the
brake bus bars, one per bus bar.
5.
Remove the 3 motor output jumper bus bars
between the main enclosure and the options
cabinet by removing 3 nuts (13 mm) at the
bottom of the bus bar, one per bus bar.
6.
Remove 3 screws (17 mm) at the top of the bus
bar, one per bus bar.
7.
Remove the input jumper bus bars between the
main enclosure and the options cabinet by
removing 3 screws (17 mm) from the top of the
bus bars, one per bus bar.
8.
Remove 3 nuts (13 mm) from the bottom of the
input bus bars, one per bus bar.
9.
Remove the fan access panel by removing 6 nuts
(8 mm) from the bottom of the panel.
10.
Remove the heatsink fan in accordance with
Reinstall in reverse order of this procedure and tighten
hardware according to
.
7.5.3 Removing the Frequency Converter
from the Options Cabinet
NOTICE!
When removing the fasteners from the top flange,
remove only the center two, which hold the frequency
converter and options cabinet together. The outer
fasteners continue to support the options cabinet after
the frequency converter has been removed.
1.
Remove the input, output and brake (if present)
bus bars in accordance with
chapter 7.5.2 Removing the Heatsink Fan with
Options Cabinet Present
2.
Remove the ground tie plate by removing 3 nuts
(13 mm) at the top of the plate inside the main
enclosure, and 3 nuts (8 mm) at the bottom of
the plate inside the option cabinet.
3.
Remove 5 nuts (8 mm) inside the option cabinet
on the bottom of the three brackets between the
option cabinet and the main enclosure.
4.
Remove 2 connector plates from the top of the
frequency converter.
Disassembly and Assembly In...
Service Manual
MG94A222
Danfoss A/S © Rev. 2014-02-10 All rights reserved.
115
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7
Summary of Contents for VLT FC 103
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