Section 6 D-Frame Sizes Disassembly And Assembly Instructions; Electrostatic Discharge (Esd); Instructions; Control Card Cassette - Danfoss VLT Series Service Manual

D-FRAME SIZES DISASSEMBLY AND ASSEMBLY INSTRUCTIONS
DANGER
!
Drives contain dangerous voltages when
connected to line voltage. No disassembly
should be attempted with power applied. Remove
power to drive and wait at least 20 minutes to let
drive capacitors fully discharge. Only a
competent technician should carry out service.

ELECTROSTATIC DISCHARGE (ESD)

Many electronic components within the adjustable frequency
drive are sensitive to static electricity. Voltages so low that
they cannot be felt, seen or heard can reduce the life, affect
performance, or completely destroy sensitive electronic
components.
CAUTION
!
Use proper electrostatic discharge (ESD)
procedures when servicing drive to prevent
damage to sensitive components.
Frame size is used throughout this manual where
ever procedures or components differ between
drives based upon the unit's physical size. Refer
to tables in the Introduction Section to determine
frame size definitions. See Section 7 for E-frame
sizes disassembly and assembly instructions.
Control terminals
(Step 1)
Captive screws
(Step 5)
Grounding clamps
(Step 2)
NOTE

Control card cassette

LCP cable connector
(Step 3)
Control card
Figure 6-1. Control Card Cassette
SECTION 6

6.0 INSTRUCTIONS

6.1 Control Card Cassette

1. Remove control wiring by unplugging control
terminals (see Figure 6-1).
2. Remove grounding clamps by removing two
screws holding each in place. Save screws for
reassembly.
3. For NEMA 12 configurations, disconnect cable
between LCP and control card.
4. Unplug the two ribbon cables from side of control
card.
5. Loosen two captive screws to free cassette (T20
Torx).
6. Slide cassette down and free from mounting tabs.
7. Remove and replace control card in accordance
with instructions included with replacement card.
Reinstall in reverse order of this procedure. Ensure that two
ribbon cables are not crossed. Tighten control card mounting
screws to 8 in-lb (1 Nm).
VLT is a registered Danfoss trademark
Ribbon cables
(Step 4)
6-1