Installing a hot-swap ac power supply

Use this information to install 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 IBM 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 110 V ac or 220 V ac auto-sensing.
• You cannot mix 460-watt and 675-watt power supplies, high-efficiency and non-high-efficiency power supplies, or ac and dc power supplies in the server.
• The following information applies when you install 460-watt power supplies in the server:
  • A warning message is generated if the total power consumption exceeds 400 watts and the server only has one operational 460-watt power supply. In this case, the server can still operate under normal condition. Before you install additional components in the server, you must install an additional power supply
  • The server automatically shuts down if the total power consumption exceeds the total power supply output capacity
  • You can enable the power capping feature in the Setup utility to control and monitor power consumption in the server (see Setup utility menu choices).
  The following table shows the system status when you install 460-watt power supplies in the server:

  Table 1. System status with 460-watt power supplies installed.

  Total system power consumption (in watts)	Number of 460-watt power supplies installed
  	One	Two	Two with one failure
  < 400	Normal	Normal, redundant power	Normal
  400 ~ 460	Normal, status warning	Normal, redundant power	Normal, status warning
  > 460	System shutdown	Normal	System shutdown

• Power supply 1 is the default/primary power supply. If power supply 1 fails, you must replace the power supply 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.
• For instructions on how to install a hot-swap dc power supply, refer to the documentation that comes with the dc power supply.

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:

1. Read the safety information that begins on Safety and Installation guidelines.
2. 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.
3. If you are installing a hot-swap power supply into an empty bay, remove the power-supply filler panel from the power-supply bay.
   Figure 1. Power supply installation
   
   
4. 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 460-watt and 675-watt power supplies, high-efficiency and non-high-efficiency power supplies, or ac and dc power supplies in the server.
5. Route the power cord through the handle so that it does not accidentally become unplugged.
6. Connect the power cord for the new power supply to the power-cord connector on the power supply.
7. Connect the other end of the power cord to a properly grounded electrical outlet.
8. 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.
9. If you are replacing a power supply with one of a different wattage, apply the power information label provided with the new power supply over the existing power information label on the server.
   Figure 2. Power information label