Balance/High Frequency Card - Danfoss VLT FC Series Service Manual

D2h/D4h/D7h/D8h/J9 Unit Dis...

11.2.13 Balance/High Frequency Card

To remove or reinstall the balance/high frequency card for 240/400 V AC or 690 V AC drives, use the following steps. Refer
to Illustration 11.7.
Disassembly in 240/400 V AC units
1. Remove the power terminal mounting plate. Refer
to chapter 11.2.11 Power Terminal Mounting Plate.
2. Unplug the cable from the MK100 connector on
the balance/high frequency card.
3. Remove 1 standoff (8 mm) from the corner of the
card.
4. Remove 3 nuts (8 mm) from the card. Two of the
nuts also hold in place the DC(+) and DC(-) wires.
5. Remove the balance/high frequency card and
insulator sheet from the drive.
Reassembly in 240/400 V AC units
Tighten hardware according to chapter 14.1 Fastener Torque
Ratings.
1. Place the insulator sheet and balance/high
frequency card in the drive.
2. Fasten 3 nuts (8 mm) in the card. Two of the nuts
also hold in place the DC(+) and DC(-) wires.
3. Fasten 1 standoff (8 mm) in the corner of the
card.
4. Connect the cable to the MK100 connector on
the balance/high frequency card.
5. Replace the power terminal mounting plate. Refer
to chapter 11.2.11 Power Terminal Mounting Plate.
MG94A502
Service Guide
Disassembly in 690 V AC units
1.
2.
3.
4.
5.
Reassembly in 690 V AC units
Tighten hardware according to chapter 14.1 Fastener Torque
Ratings.
1.
2.
3.
4.
5.
Danfoss A/S © 02/2019 All rights reserved.
Remove the power terminal mounting plate. Refer
to chapter 11.2.11 Power Terminal Mounting Plate.
Unplug the cable from the MK100 connector on
the balance/high frequency card.
Remove 1 standoff (8 mm) from the corner of the
card.
Remove 3 nuts (8 mm) and 1 screw (T20) from
the card. One of the nuts and the screw also hold
in place the DC(+) and DC(-) wires.
Remove the balance/high frequency card and
insulator sheet from the unit.
Place the insulator sheet and balance/high
frequency card in the unit.
Fasten 3 nuts (8 mm) and 1 screw (T20) in the
card. One of the nuts and the screw also hold in
place the DC(+) and DC(-) wires.
Fasten 1 standoff (8 mm) in the corner of the
card.
Connect the cable to the MK100 connector on
the balance/high frequency card.
Replace the power terminal mounting plate. Refer
to chapter 11.2.11 Power Terminal Mounting Plate.
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