Chapter 4
Removing and Replacing Components
Hot-Swap Power Supplies
97
Hot-Swap Power Supplies
The hp 9000 rp4440 Server has two hot-swap power supply units (PSU). These PSUs are located at the rear of
the HP Server. The supported configuration of the HP Server requires a minimum of one PSU be 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 9000 rp4440 Server requires a minimum of one PSU. A second,
optional hot-swap PSU, may be installed to provide N+1 capability. Each hot-swap requires a separate power
cord.
The left side (viewing from the rear) hot-swap PSU is identified as P0, the second hot-swap power supply is
identified as P1. 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 P1 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 system is powered down, install the hot-swap PSU into the server before attaching the
new power cord at the rear of the system. Failure to observe this caution will result in damage
to the server.
