Removing The Dust Filter; Removing And Replacing The Fan Tray - Cisco ASR 903 Installation Manual

Chapter 3 Installing the Cisco ASR 903 Router
Slide the dust filter onto the fan tray. See
Step 3
Insert the dummy cover on the fan tray to secure the filter within the chassis.
Step 4
Follow the steps to install the fan tray in the chassis. See
Step 5

Removing the Dust Filter

The dust filter must be removed for cleaning or for a replacement.
We recommend cleaning or replacing the dust filter once every six months.
Note
Remove the dummy cover from the fan tray.
Step 1
Remove the dust filter from the fan.
Step 2
Note
Slide the replacement dust filter onto the fan tray
Step 3
Step 4 Insert the dummy cover onto the fan tray to secure the filter within the chassis.

Removing and Replacing the Fan Tray

The fan tray supports online insertion and removal (OIR). There is no need to power down the
Cisco ASR 903 Router to remove or replace the fan tray. However, the router will shut down if the fan
tray is removed from the chassis for more than five minutes.
The router can stay active for up to five minutes if the temperature is below the ambient limit. However,
Caution
in the event of an overtemperature alarm, the router can shut down in less than five minutes. In the event
of a critical temperature alarm, the router shuts down immediately.
To avoid erroneous failure messages, allow at least 2 minutes for the system to reinitialize after the fan
Caution
tray has been removed or replaced.
Follow these steps to remove and replace the fan tray on the Cisco ASR 903 Router:
Step 1 Using a No. 2 Phillips screwdriver or your fingers, loosen the captive installation screw that secures the
fan tray to the chassis.
screws.
OL-25178-03
The filter can be accessed by pulling the pull tab by using fingers or pliers. See
Figure 3-14
Figure 1-5.
Installing the Fan Tray, page
shows the front of the fan tray, including the captive installation
Cisco ASR 903 Router Hardware Installation Guide
Installing the Fan Tray
3-10.
Figure 1-5.
3-11