Removing A Power Supply; Using Y Power-Cord Connectors For Power Backup - IBM 88371RU Maintenance And Troubleshooting Manual

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6. Make sure that the power-supply fan starts and the ac power LED (top) and dc

Removing a power supply

To replace an existing power supply, you must remove the old one. Complete the

following steps to remove a hot-swap power supply:

1. Read Appendix B, "Safety information," on page 129 and "Installation guidelines"

2. Turn off the server and peripheral devices (see "Turning off the server" on page

3. If the server is in a rack, at the back of the server, pull back the cable

4. Remove the power cord.

5. From the rear of the sever, push left on the orange release lever and then push

6. Pull the power supply all the way out of the power-supply bay.

7. Install a new power supply by following the instructions in "Installing a power

When you have multiple servers with redundant power supplies, use Y power-cord

connectors to provide the proper connection to the backup power-supply

(Back-UPS) units. The Back-UPS unit provides temporary power to the connected

devices in the case of a power outage in the network. The Back-UPS unit must be

connected correctly to ensure optimum power backup to the servers.

Connect the Y power cord to two power supplies, in two different servers, then

connect the other end of the Y power cord to a Back-UPS unit. Figure 35 on page

43 shows the connection between the servers with the Y power-cord.

xSeries 336 Type 1879 and Type 8837: Hardware Maintenance Manual and Troubleshooting Guide

power LED (bottom) on the power supply are lit, indicating that the power

supply is operating correctly. The two green LEDs are to the left of the

power-cord connector.

on page 15.

10); then, and disconnect all power cords and external cables.

management arm to get access to the rear of the server to remove the power

supply.

down to release the power-supply assembly and move the power supply back

slightly for easy removal.

supply" on page 41 or reinstall the blank cover, to keep the server from

overheating.

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