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Chapter 4
Removing and Replacing Components
Removing and Replacing the Power Supplies
98
Removing and Replacing the Power Supplies
The HP Integrity rx4640 server has two 200-240 VAC hot-swap power supply units (PSU). These PSUs are
located at the rear of the HP server. The supported configuration of the HP Integrity rx4640 server requires a
minimum of one PSU installed.
CAUTION Observe all ESD safety precautions before attempting this procedure. Failure to follow ESD
safety precautions could result in damage to the server.
NOTE A hot-swap device does not require interaction with the operating system before the device is
removed from or installed into the server.
The ac power to the server does not have to be off to remove or replace a hot-swap power supply.
Power Supply Load Order
The supported configuration of your HP Integrity rx4640 server requires a minimum of one 200-240 VAC
PSU. A second, optional hot-swap PSU, may be installed to provide N+1 capability. Each PSU requires a
separate power cord.
The left side (viewing from the rear) hot-swap PSU is identified as P 0, the second hot-swap power supply is
identified as P 1. Each hot-swap PSU requires a separate power cord be installed in the appropriate power
cord receptacle and attached to a power cord support bracket.
CAUTION The empty hot-swap PSU slot P 1 must remain closed with the supplied metal cover when a
second PSU is not used. Your server may be damaged due to overheating if the cover does not
remain in place.
WARNING Be careful when installing a hot-swap power supply. It is heavier than it appears.
CAUTION If the server is powered down, install the hot-swap PSU into the server before attaching the
new power cord at the rear of the server. Failure to observe this caution results in damage to
the server.
Removing a Hot-Swap Power Supply
To remove a hot-swap PSU, follow these steps:
CAUTION Be careful when removing the hot-swap power supply. It is heavier than it appears.
Step 1. If rack mounted, slide the HP server back out of the rack until it stops. See “Extending the Server
from the Rack” on page 39.
Step 2. Remove the power cord plug from the power receptacle.