Removing and Replacing the Fan Trays
Cisco 12008 Gigabit Switch Router Installation and Configuration Guide
7-48
Checking the Installation of a Fan Tray
To verify that a replacement fan tray is operating properly, perform the following steps:
Step1 Check the following components to make sure that they are secure:
•The power supply fan tray is inserted all the way into the bay and its captive
installation screw is tightened.
•The card cage fan tray is inserted all the way into the lower card cage and its
two captive installation screws are tightened.
•The air filter assembly is securely installed on the front of the lower card
cage.
Step2 Observe the status LEDs on the CSC faceplate (see the following section entitled
“Status LEDs for the Fan Trays”).
Step3 Listen for the sound of the running cooling fans in the card cage fan tray and the
power supply fan tray. In a noisy environment, it may be dif ficult to hear the fans
running. If so, proceed to Step 4.
Step4 Run your hand along the width of the top rear of the router enclosure to verify
that air is being exhausted from the vents for the upper card cage and the power
supply bays.
If either fan tray fails to operate properly, contact your Cisco service representative for
assistance.
Status LEDs for the Fan Trays
The status LEDs for the fan trays are arranged side-by-side on the CSC faceplate (see
Figure7-14). The positions of these LEDs correspond to the positions of the fan trays in the
router.
The left LED indicates the status of the card cage fan tray, and the right LED indicates the
status of the power supply fan tray.
Table7-1 lists the status LEDs for the fan trays and describes their meaning in the on/off
state.