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Catalyst 4500 E-Series Switches Installation Guide
OL-13972-01
Chapter 4 Removing and Replacing FRUs
Removing and Replacing the Chassis Fan Assembly
Caution In a system with multiple power supplies or a single triple-input power supply, connect each power
supply to a separate DC power source. In the event of a power source failure, if the second source is still
available, it can maintain maximum overcurrent protection for each power connection.
Step 8 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 FAIL is not lit.
Step 9 Check the power supply and system status from the system console by entering the show power
command. For more information on the commands, refer to the command reference publication for your
switch and software.
Step 10 If the LEDs or the show power command (Cisco IOS) output indicate a power problem or other system
problem, see
Chapter 5, “Troubleshooting,” for more information.
Removing and Replacing the Chassis Fan Assembly
This section describes how to remove and install the chassis fan assembly for the Catalyst 4500 E-series
switches. See
Figure 4-17 for the Catalyst 4506-E system fan assembly, other fan assemblies attach in a
very similar way.
Required Tools
You will need a Phillips screwdriver for the following two procedures.
Removing the Fan Assembly
Warning
When removing the fan tray, keep your hands and fingers away from the spinning fan blades. Let the
fan blades completely stop before you remove the 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.
Follow these steps to remove the existing chassis fan assembly:
Step 1 Loosen the two captive installation screws on the fan assembly by turning them counterclockwise.
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