Chapter
3
Publication 1336 IMPACT-6.8 – November, 2002
Access Procedures
This chapter describes general disassembly procedures required to
access internal drive components for testing or repair.
!
ATTENTION: Some printed circuit boards and drive
components may contain hazardous voltage levels.
Remove and lock out power before you disconnect or
reconnect wires, and before you remove or replace
fuses and circuit boards. Verify bus voltage by
measuring the voltage between the Negative Capacitor
Bus and both ends of all three bus fuses. An open fuse
does not show voltage across both ends of the fuse.
Failure to measure voltage at both ends of the fuses
may result in death or serious injury. Refer to Figure
3.5. Do not attempt to service the drive until the bus
voltage has discharged to zero volts.
!
ATTENTION: Servicing energized industrial control
equipment can be hazardous. Electrical shock, burns,
or unintentional actuation of controlled industrial
equipment may cause death or serious injury. Follow
the safety-related practices of NFPA 70E, Electrical
Safety for Employee Workplaces, when working on or
near energized equipment. Do not work alone on
energized equipment.
Chapter Objectives
Access Overview
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