Lenovo System x3300 M4 Installation And Service Manual page 264

Step 4. If you are instructed to return the power supply, follow all packaging instructions, and use any
packaging materials for shipping that are supplied to you.
Replacing a hot-swap power supply
Use this information to replace a hot-swap power supply.
The following notes describe the type of power supply that the server supports and other information that
you must consider when you replace a power supply:
• To confirm that the server supports the power supply that you are installing, see http://www.lenovo.com/
serverproven/.
• Before installing an additional power supply or replace a power supply with one of a different wattage,
the user may use the Power Configurator utility to determine current system power consumption. For
more information and to download the utility, go to http://www-03.ibm.com/ systems/bladecenter/
resources/powerconfig.html.
• 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.
• 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.
• The user 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.
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System x3300 M4 Installation and Service Guide