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Cisco UCS C240 Server Installation and Service Guide
OL-25761-01z
Chapter 3 Maintaining the Server
Replacing an Internal SD Card
Replacing Power Supplies
The server can have one or two power supplies. When two power supplies are installed they are
redundant as 1+1.
• See Power Specifications, page A-2 for more information about the power supplies.
• See Rear Panel LEDs and Buttons, page 3-4 for information about the power supply LEDs.
• See Wiring a DC Power Supply, page 3-72 for information about wiring a DC power supply.
To replace or install a power supply, follow these steps:
Note If you have ordered a server with power supply redundancy (two power supplies), you do not have to
power off the server to replace power supplies because they are redundant as 1+1.
Note Do not mix power supply types in the server. Both power supplies must be either 650W or 1200W.
Step 1 Remove the power supply that you are replacing or a blank panel from an empty bay (see Figure 3-41):
a. Perform one of the following actions:
–
If your server has only one power supply, shut down and power off the server as described in
the “Shutting Down and Powering Off the Server” section on page 3-7.
–
If your server has two power supplies, you do not have to shut down the server.
b. Remove the power cord from the power supply that you are replacing.
For a DC power supply, release the electrical connector block from the power supply by pushing the
orange plastic button on the top of the connector inward toward the power supply. Pull the connector
block from the power supply.
c. Grasp the power supply handle while pinching the release lever towards the handle.
d. Pull the power supply out of the bay.
Step 2 Install a new power supply:
a. Grasp the power supply handle and insert the new power supply into the empty bay.
b. Push the power supply into the bay until the release lever locks.
c. Connect the power cord to the new power supply.
For a DC power supply, push the electrical connector block into the power supply.
Note For a DC power supply, see
d. If you shut down the server, press the Power button to return the server to main power mode.
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