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Cisco UCS C220 M4 Server Installation and Service Guide
OL-32473-01
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.
• See Power Specifications, page A-3 for more information about the power supplies.
• See Rear Panel LEDs and Buttons, page 3-4 for information about the power supply LEDs.
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 or wattages in the server.
Step 1 Remove the power supply that you are replacing or a blank panel from an empty bay (see Figure 3-29):
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.
c. Grasp the power supply handle while pinching the release lever toward 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.
d. If you shut down the server, press the Power button to return the server to main power mode.
Figure 3-29 Removing and Replacing Power Supplies
1 Power supply release lever 2 Power supply handle
353105
mLOM
PCIe 01 PCIe 02
PSU 01 PSU 02
1
2
2
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