Cisco ASR 903 Installation Instructions Manual page 33

Installing the Cisco ASR 903 Router as a Satellite Shelf
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.
Follow these steps to remove and replace the fan tray on the Cisco ASR 903 Router as a satellite shelf:
SUMMARY STEPS
1. Using a No. 2 Phillips screwdriver or your fingers, loosen the captive installation screw that secures the
fan tray to the chassis. This figure shows the front of the fan tray, including the captive installation screws.
2. Grasp the fan tray handle with one hand and the outside of the chassis with the other hand. The figure
above shows the front of the fan tray, including the handle.
3. Pull the fan tray backward toward you no more than 1 inch to disengage it from the power receptacle on
the midplane, as shown in this figure .
4. Wait at least 5 seconds to allow the fans to stop spinning. Then, pull the fan tray backward toward you
and out of the chassis.
DETAILED STEPS
Step 1
Using a No. 2 Phillips screwdriver or your fingers, loosen the captive installation screw that secures the fan tray to the
chassis. This figure shows the front of the fan tray, including the captive installation screws.
Figure 14: Detaching the Fan Tray
Step 2 Grasp the fan tray handle with one hand and the outside of the chassis with the other hand. The figure above shows the
front of the fan tray, including the handle.
Caution The fans are exposed on the left side of the fan tray. Keep your fingers, clothing, and jewelry away from the
fans. Always handle the fan tray by the handle.
Cisco ASR 9000 Series Aggregation Services Router Satellite Systems Installation Guide
Removing and Replacing the Fan Tray
33