Disassembly And Assembly Instructions; Introduction; Electrostatic Discharge (Esd); D1H/D3H Disassembly And Assembly Instructions - Danfoss VLT FC 100 Service Manual

Disassembly and Assembly In...

7 Disassembly and Assembly Instructions

7.1 Introduction

WARNING
Adjustable frequency drives contain dangerous voltages
when connected to AC line voltage. Do not disassemble
when power is applied. Disconnect power to the
adjustable frequency drive, and wait for a minimum
period of 20 minutes for the adjustable frequency drive
capacitors to discharge fully. Competent technicians are
the only persons qualified to perform these procedures.
NOTICE!
Frame size is used throughout this manual where
procedures or components differ between adjustable
frequency drives based upon the unit's physical size.
Refer to the tables in chapter 1.5 Frame Size Definitions to
determine frame size definitions.
In this chapter, chapter 7.3 D1h/D3h Disassembly and
Assembly Instructions describes the disassembly procedure
for the D1h, D3h, D5h, and D6h adjustable frequency drive,
and chapter 7.4 D2h/D4h Disassembly and Assembly
Instructions describes the procedure for D2h, D4h, D7h,
and D8h.

7.2 Electrostatic Discharge (ESD)

ELECTROSTATIC DISCHARGE (ESD)
Many electronic components within the adjustable
frequency drive are sensitive to static electricity. Voltages
so low that they are undetectable can reduce the life,
affect performance, or completely destroy sensitive
electronic components.
CAUTION
Use the correct ESD procedures to prevent damage to
sensitive components when servicing the adjustable
frequency drive.
MG94A222
Service Manual
7.3 D1h/D3h Disassembly and Assembly
Instructions

7.3.1 General Information

These disassembly instructions are based on IP21 (NEMA 1)
IP54 (NEMA 12) enclosure. Some details vary for the IP20
version.
7.3.2 Control Card and Control Card
Mounting Plate
1.
2.
3.
4.
5.
Danfoss A/S © Rev. 2014-02-10 All rights reserved.
Open the front panel door or remove the front
cover, depending on the enclosure type.
Remove the LCP cradle and LCP ribbon cable. The
LCP cradle can be removed by hand.
Remove any customer control wiring from the
control card and option cards.
Remove the four screws (T20) from the corners of
the control card mounting plate.
Unplug the ribbon cable connecting the control
card and the power card.
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