Replacing a hot-swap ac power supply

Observe the following precautions when you replace a hot-swap ac power supply.

The following notes describe the type of power supply that the server supports and other information that you must consider when you install a power supply:

Before you install an additional power supply or replace a power supply with one of a different wattage, you may use the Power Configurator utility to determine current system power consumption. For more information and to download the utility, go to the IBM Power Configurator website.
The server comes with one hot-swap 12-volt output power supply that connects to power supply bay 1. The input voltage is 100-127 V ac or 200-240 V ac auto-sensing.
Power supplies in the server must be with the same power rating or wattage to ensure that the server will operate correctly. For example, you cannot mix 550-watt and 750-watt power supplies in the server.
Power supply 1 is the default/primary power supply. If power supply 1 fails, you must replace the power supply with the same wattage immediately.
You can order an optional power supply for redundancy.
These power supplies are designed for parallel operation. In the event of a power-supply failure, the redundant power supply continues to power the system. The server supports a maximum of two power supplies.

Statement 5

CAUTION

The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.

Statement 8

CAUTION

Never remove the cover on a power supply or any part that has the following label attached.

Hazardous voltage, current, and energy levels are present inside any component that has this label attached. There are no serviceable parts inside these components. If you suspect a problem with one of these parts, contact a service technician.

To install a hot-swap ac power supply, complete the following steps:

Read the safety information that begins on Safety and Installation guidelines.
Touch the static-protective package that contains the hot-swap power supply to any unpainted metal surface on the server; then, remove the power supply from the package and place it on a static-protective surface.
If you are installing a hot-swap power supply into an empty bay, remove the power-supply filler from the power-supply bay.
Figure 1. Power supply installation
Grasp the handle on the rear of the power supply and slide the power supply forward into the power-supply bay until it clicks. Make sure that the power supply connects firmly into the power-supply connector.
Attention
Do not install the different power rating or wattage of power supplies, high-efficiency and non-high-efficiency power supplies in the server.
Route the power cord through the clip next to power-supply and through any cable clamps on the rear of the server, to prevent the power cord from being accidentally pulled out when you slide the server in and out of the rack.
Connect the power cord for the new power supply to the power-cord connector on the power supply. The following illustration shows the power-cord connectors on the rear of the server.
Figure 2. Power-cord connectors on rear of server
Connect the other end of the power cord to a properly grounded electrical outlet.
Make sure that the ac power LED and the dc power LED on the ac power supply are lit, indicating that the power supply is operating correctly. The two green LEDs are to the right of the power-cord connector.
If you are replacing a power supply with one of a different wattage in the server, apply the new power information label provided over the existing power information label on the server. Power supplies in the server must be with the same power rating or wattage to ensure that the server will operate correctly.
Figure 3. Power information label
If you are adding a power supply to the server, attach the redundant power information label that comes with this power supply on the server cover near the power supplies.
Figure 4. Redundant power information label

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