Removing The Fan Tray - Cisco ASR-920-24SZ-IM Installation Manual

Installing and Removing the Fan Tray
Figure 3-17
This completes the procedure for installing or replacing the fan tray in a Cisco ASR 920-24SZ-IM,
ASR-920-24SZ-M, ASR-920-24TZ-M Router.
For more information about air flow guidelines, see the

Removing the Fan Tray

The fan tray supports online insertion and removal (OIR). There is no need to power down the Cisco
ASR 920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M 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 5 minutes if the temperature is below the ambient limit. However, in
Caution
the event of an overtemperature alarm, the router can shut down in less than 5 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.
Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation Guide
3-24
Installing the Fan Tray on Cisco ASR-920-24SZ-M, ASR-920-24TZ-M Router
"Air Flow Guidelines" section on page
Chapter 3 Installing
2-10.