Disassembly/Assembly - Rectifier Module; For Your Safety; Danfoss Training Required; Rectifier Module - Danfoss VLT HVAC Drive FC100 Service Manual

Disassembly/Assembly - Rect...

9 Disassembly/Assembly - Rectifier Module

9.1 For Your Safety

9.1.1 Danfoss Training Required

CAUTION
Only Danfoss trained and certified technicians are
permitted to test and repair components within the unit
modules. The procedures described in this section are
intended for Danfoss qualified technicians. Repair work
conducted by non-certified technicians can result in
personal injury or equipment damage.

9.2 Rectifier Module

NOTE for 12-pulse frequency converters. Instructions
presented here are the same for 12-pulse units as F-frame
units with the exception that 12-pulse units may vary in
the number of SCR and diode modules as described for F-
9 9
frame units. Also, for F8/F9 model 12-pulse units, an
additional MPIC card is connected to the power card to
provide control to the additional SCRs present on those
units.

9.2.1 Internal Access

1. Remove rectifier module from frequency
converter in accordance with instruction in
section Rectifier Module.
2. Remove right side panel from rectifier module by
removing six nuts (T25) and one nut (8mm).
120
High Power Service Manual for Modular F Frame Drives

9.2.2 Power Card

NOTE: Power card may remain installed if power card
mounting plate is being removed to access soft charge
boards. Disconnect cabling.
1.
2.
3.
Reinstall in reverse order of this procedure. Tighten
mounting screws to 2.3 Nm (20 in-lbs).
3
1
2
3
®
MG90K202 - VLT is a registered Danfoss trademark
Disconnect cabling from power card: MK100,
MK102, MK103, MK104, MK105, MK106, MK108,
MK110, Mk112, and FK102.
Remove power card by removing seven screws
(T25) and detach plastic standoff at top right
corner of power card.
Insulation sheet behind power card can be left in
place. Ensure its is in place for reassembly.
1
Power card (step 1)
Power card mounting plate
Power card attaching screw (step 2)
2
3