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Cisco UCS C240 M4 Server Installation and Service Guide
OL-32474-01
Chapter 3 Maintaining the Server
Installing or Replacing Server Components
Replacing Power Supplies
The server can have one or two power supplies. When two power supplies are installed they are
redundant as 1+1 and hot-swappable.
• See Power Specifications, page A-2 for more information about the supported power supplies.
• See Rear Panel LEDs and Buttons, page 3-5 for information about the power supply LEDs.
• See Wiring a DC Power Supply, page 3-70 for information about wiring a DC power supply.
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 and hot-swappable.
Note Do not mix power supply types in the server. Both power supplies must be the same wattage and Cisco
product ID (PID).
Step 1 Remove the power supply that you are replacing or a blank panel from an empty bay:
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
Shutting Down and Powering Off the Server, page 3-9.
–
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 (see Figure 3-34).
Pull the connector block from the power supply.
c. Grasp the power supply handle while pinching the green release lever towards the handle (see
Figure 3-33).
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.
d. If you shut down the server, press the Power button to return the server to main power mode.
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