Soft Charge (Sc) Resistors D2 Units; Soft Charge Resistor - Danfoss VLT Series Service Manual

6.8 Soft Charge (SC) Resistors D2 Units

1. Remove capacitor bank assembly in accordance
with procedure.
On D2 units, only upper cap bank assembly is
removed.
2. MK4 connector on soft charge card must be
disconnected. Disengage soft charge card far
enough to access MK4 (see Figure 6-4) in
accordance with steps 1-3 in soft charge card
disassembly procedure.
3. Note that soft charge resistor is located under bus
bars and held in place by 2 retaining nuts. Bus
bars do not need to be removed. Loosen right
most retaining nut (8mm).
4. Remove left most 8mm retaining nut.
5. Lift left side of SC resistor and remove resistor by
sliding to left and out from under bus bars.
Reinstall in reverse order of this procedure. Tighten 8mm
mounting nuts to 20 in-lbs (2.25 Nm). Tighten 10mm mounting
nuts to 35 in-lbs (4 Nm).
6-6
VLT is a registered Danfoss trademark
NOTE
Bus bars BB27 (do not remove)
Figure 6-7. D2 Soft Charge Resistor

Soft charge resistor

Retaining nut (loosen)
(Step 3)