Hardware options installation 76
10.
Install the fan cage.
11. Install the air baffle.
12. Install the access panel (on page 23).
13. Do one of the following:
o For tower models, return the server to an upright position.
o For rack models, slide the server back into the rack.
14. Connect each power cord to the server.
15. Connect each power cord to the power source.
16. Press the Power On/Standby button.
The server exits standby mode and applies full power to the system. The system power LED changes
from amber to green.
17. Do one of the following:
o For tower models, install the bezel.
o For rack models, if removed, install the security bezel (on page 45).
Redundant fans option
Redundant fan guidelines
The server supports redundant fans to provide proper airflow to the system when a primary fan fails.
In the standard, nonredundant configuration, fans 2, 3, and 4 cool the server.
For the redundant configuration, fan 1 and four fan louvers are added to back up the primary fans. This
configuration enables the server to continue operation in redundant mode, when a fan failure occurs. In a
redundant fan configuration:
• If one fan fails, then the other three fans provide airflow.
• If two fans fail, then the server shuts down.
IMPORTANT: Fan louvers must be present for the redundant configuration. Without the louvers,
all four fans are nonredundant.
NOTE: If your system is already installed with four fans, store the fan that is included in this kit as
a spare.
Installing a hot-plug redundant fan
1. Do one of the following:
o For tower models, open and remove the bezel ("Remove the tower bezel" on page 20).
o For rack models, if installed, remove the security bezel (on page 20).
2. Power down the server (on page 19).
3. Remove all power:
a. Disconnect each power cord from the power source.
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