Cisco Systems Boat Cisco Systems Boat User Manual

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Cisco Catalyst 4900M Switch Installation Guid e
78-18350-02
Chapter 3 Installing the Switch
Removing and Replacing the Fan Assembly
Step 11 Press the power switch to the on (|) position.
Step 12 Verify power supply operation by checking the power supply’s front-panel LEDs. You should see the
following:
• The LED labeled INPUT OK is green.
• The LED labeled OUTPUT OK is green.
Step 13 Check the power sup ply and system status from the system console by entering show power command.
For more information on this command, refer to the command reference publication for your switch.
Step 14 If the LEDs or show power command output indicate a power problem or other system problem, see
Chapter 4, “Troubleshooting the Installation,” for more information.
Removing and Replacing the Fan Assembly
This section describes how to remove and install the fan assembly.
Required Tools
You will need a Phillips screwdriver for the following two procedures.
Removing the Fan Assembly
Wa r ni n g
When removing the fan tray, keep your hands and fingers away from the spinning fan blades. Let the
fan blades comple tely stop befor e you remove th e fan tray .
Statement 258
Caution Never operate the system for an extended period if the fan assembly is removed or if it is not functioning
properly. An over-temperature condition can cause severe equipment damage.
To remove the existing fan assembly, perform the following steps:
Step 1 Loosen the two captive installation screws on the fan assembly by turning them counterclockwise.
Step 2 Grasp the fan assembly with both hands and pull it outward; gently move it side to side if necessary to
unseat it from the backplane. Slide it out of the chassis and place it in a safe place.

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