Rockwell Automation Allen-Bradley PowerFlex 755 Installation Instructions

Installation Instructions
Original Instructions
PowerFlex 755 AC Drives Cabinet Blower Assembly
Frames 8...10
Remove Power from the Drive
SK-R1-FAN4-F8
ATTENTION: To avoid an electric shock hazard, verify that the voltage on the
bus capacitors has discharged completely before servicing. Measure the DC bus
voltage at the –DC and +DC TESTPOINT sockets on the front of the power
module (see below for location).
Remove power before making or breaking cable connections. When you remove or
insert a cable connector with power applied, an electrical arc may occur. An
electrical arc can cause personal injury or property damage by:
• sending an erroneous signal to your system's field devices, causing unintended
machine motion
• causing an explosion in a hazardous environment
Electrical arcing causes excessive wear to contacts on both the module and its
mating connector. Worn contacts may create electrical resistance.
1. Turn off and lock out all input power, including any and all external power
sources. For common DC input drives only, turn off input power and lock
the drive disconnect switch SW2 and circuit breaker SW5 (if used).
ATTENTION: To avoid an electric shock hazard when servicing the drive, a
means for Lockout/Tagout of an external 120V uninterruptible power supply
and/or external 120/240V power source must be provided, or the circuit breaker
SW5 must be locked and tagged. Locking and tagging the common bus
precharge disconnect switch SW2 alone does not provide sufficient protection
when servicing the drive.