Rockwell Automation 20L-LL PowerFlex 700L Liquid-to-Liquid Heat Exchanger Control Board Replacement - Manual (Page 2)

2 PowerFlex® 700L Liquid-to-Liquid Heat Exchanger Control Board Replacement
Step 1: Removing Power
from the Drive Power
Module
A. Turn off and lock out input power. Wait 5 minutes.
B. Verify that there is no voltage at the drive power module’s input power
terminals.
C. Remove the front cover of the drive power module (complete cover for
Frame 2 drives or lower front cover for Frame 3A and 3B drives).
D. Measure the DC bus voltage at the DC+ TESTPOINT and DC-
TESTPOINT sockets on the front of the drive power module chassis.
The voltage must be zero.
!
ATTENTION: To avoid an electric shock hazard, verify that the
voltage on the drive power module bus capacitors has completely
discharged before performing any work on the heat exchanger.
After removing power to the drive power module, wait 5 minutes
for the bus capacitors to discharge. Remove the front cover of the
drive power module (complete cover for Frame 2 drives or lower
front cover for Frame 3A and 3B drives). Measure the DC bus
voltage at the DC+ TESTPOINT and DC- TESTPOINT sockets
on the front of the drive power module. The voltage must be zero.
Remove power before making or breaking cable connections.
When you remove or insert a cable connector with power
applied, an electrical arc may occur, which 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.
L1 L2 L3
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