Danfoss VLT series Service Manual

6-6
VLT is a registered Danfoss trademark
6.8 Soft Charge (SC) Resistors D2 Units
1. Remove capacitor bank assembly in accordance
with procedure.
NOTE
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).
Soft charge resistor
Figure 6-7. D2 Soft Charge Resistor
Bus bars BB27 (do not remove)
Retaining nut (loosen)
(Step 3)

Danfoss VLT series Specifications

General

Series	VLT
Category	DC Drives
Output Voltage	0-100% of input voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Overtemperature, Short Circuit, Ground Fault
Communication Interfaces	Profibus, CANopen
Enclosure Rating	IP20, IP21, IP55, IP66
Cooling Method	Forced Air Cooling, Convection Cooling
Control Mode	Sensorless Vector, Closed Loop Vector
Ambient Temperature	-10°C to +50°C (14°F to 122°F)