Replacing A Power Supply - Lenovo System x3550 M4 Installation And Service Manual

Figure 168. Power supply removal
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 power supply

Use this information to replace a power supply.
Replacing a hot-swap ac power supply
Use this information to 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 http://www.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. 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
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Chapter 6 Removing and replacing components
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