8 E-Frame Sizes Disassembly and Assembly In-
structions
8.1 Electrostatic Discharge (ESD)
Adjustable frequency drives contain dangerous voltages when connected to AC line
voltage. No disassembly should be attempted with power applied. Remove power
to the adjustable frequency drive and wait at least 40 minutes to let the adjustable
frequency 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.
Use proper electrostatic discharge (ESD) procedures to prevent damage to sensitive
components when servicing the adjustable frequency drive.
NOTE!
Frame size is used throughout this manual where ever procedures or components
differ between adjustable frequency drives based upon the unit's physical size. Refer
to the tables in the Introduction section to determine E frame size definitions.
8.2 Instructions
8.2.1 Control Card and Control Card Mounting Plate
1.
Open the front panel door or remove the front cover, depending on the unit type.
2.
(See Figure 8-1) Unplug the LCP ribbon cable (not shown) from the control card or re-
move the LCP, depending on the unit type. The LCP can be removed by hand.
3.
Remove the LCP cradle. LCP cradle can be removed by hand.
4.
Remove any customer control wiring from the control card terminal blocks.
5.
Remove the 4 screws (T20 Torx) securing the control card mounting plate to the control
assembly support bracket.
6.
Unplug the ribbon cable from the back of the control card.
Reinstall in reverse order of this procedure. The red conductor on the ribbon cable between the
control card and the power card should be on the bottom of the connector. Tighten the control
card mounting plate screws to 1 Nm (8 in-lb).
High Power Service Manual for VLT
®
FC Series
Adjustable Frequency Drives
8 E-Frame Sizes Disassembly and Assembly
Instructions
MG.90.L1.22 - VLT
®
is a registered Danfoss trademark
8-1
8
Summary of Contents for VLT HVAC FC 100
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