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: