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UM582127000 User Instructions
Issue AC, January 2, 2013 Spec. No. 582127000 (Model 721NPBB)
Page 38 Chapter 4. Troubleshooting and Repair
This document is property of Emerson Network Power, Energy Systems, North America, Inc. and contains confidential and proprietary information owned by Emerson Network Power, Energy
Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
9) Remove the screws securing the circuit card and remove the circuit card from the
distribution cabinet.
10) In this step, ensure you do not intermix the old and replacement circuit cards.
Set the shorting jumpers on the replacement circuit card to match the locations
on the old circuit card. Jumper settings are documented in CHAPTER 3.
SETTING JUMPERS AND SWITCH OPTIONS of the Power System Installation
Instructions (IM582127000).
11) Slide the replacement circuit card into the mounting position inside the
distribution cabinet, and secure with the screws removed from the old circuit
card.
12) Plug all connectors removed from the old circuit card into the same position on
the replacement circuit card.
Danger: In the next step, external alarm wiring may be energized from an
external source. DO NOT allow bare wire ends to contact any
grounded or energized object.
13) Reconnect the external wiring to the correct terminals on the customer
connection terminal block. First remove the electrical tape that was applied to
the bare wire end in a previous step. DO NOT allow the bare wire end to contact
any grounded or energized object. After securing the wire, gently tug on the wire
to ensure that it cannot be pulled out of the terminal block. Repeat for each wire
to be reconnected.
14) Remove the grounding wrist strap.
15) Reinstall the top and front panels that cover the circuit cards at the bottom of the
distribution cabinet.
16) Close the distribution cabinet’s front door. Turn the latch clockwise to secure the
door.
17) Enable the external alarms, or notify appropriate personnel that this procedure is
finished.
18) Ensure that there are no local or remote alarms active on the system.