Lower capacitor bank D2/D4 units
1.
Capacitor bank connection to DC bus bars can be seen recessed in the gap between
upper and lower cap banks. Remove the 2 cap bank retaining nuts (10 mm) furthest to
the right from the DC bus bars. A minimum 4 in [100 mm] extension is required.
2.
Note that the IGBT gate drive card can remain attached to the cap bank cover plate.
Disconnect MK100, MK102, MK103, MK104, and MK106 from the gate drive card. Also
remove the MK105, for units with a brake, and MK101 for units with an RFI filter.
3.
Remove the 4 retaining nuts (10 mm) from the cap bank cover plate, and remove the
plate.
4.
Note that the weight of the cap bank is approximately 20 lbs [9 kg]. Remove the cap
bank by pulling it free from the mounting studs.
Reinstall in reverse order of this procedure. Tighten the mounting screws to 4 Nm (35 in-lbs).
Single capacitor bank D1/D3 units
1.
Remove the control assembly support bracket in accordance with instructions.
2.
Remove the 2 capacitor bank retaining nuts (10 mm) from the DC bus bars. A minimum
4 in [100 mm] extension is required.
3.
Note that the IGBT gate drive card can remain attached to the cap bank cover plate.
Disconnect MK100, MK102, MK103, MK104, and MK106 from the gate drive card. Also
remove the MK105, for units with a brake, and MK101 for units with an RFI filter.
4.
Remove the 4 retaining nuts (10 mm) from the cap bank cover plate, and remove the
plate.
5.
Note that the weight of the cap bank is approximately 20 lbs [9 kg]. Remove the cap
bank by pulling it free from the mounting studs.
Reinstall in reverse order of this procedure. Tighten the mounting screws to 4 Nm (35 in-lbs).
1
Retaining nuts (step 2)
2
Retaining nuts (step 4)
3
Gate drive card (step 3)
380–480/500V: Blue DC Link Capacitors.
525–690V: Black DC Link Capacitors.
130BX72.10
1
2
3
Figure 7.6: D1/D3 Single Capacitor Bank Assembly
7 D-Frame Sizes Disassembly and Assembly
Instructions
High Power Service Manual for VLT
®
FC Series
Adjustable Frequency Drives
7-8
MG.90.L1.22 - VLT
®
is a registered Danfoss trademark
7
Summary of Contents for VLT HVAC FC 100
Page 219: ......