Cisco ASR 903 Installing Guide

Table 1: Fan Tray Replacement Time
Replacement Time at 25°C AmbientFan TrayRSP Module
5 minutesA903-FAN, A903-FAN-ERSP1, RSP2
1 minuteA903-FAN, A903-FAN-ERSP3
If the fan tray is removed and not replaced within the stipulated time, then the system will automatically
power off. If the system is powered off, the AC or the DC input should be turned off for at least 30 seconds
for all the PSU in the system simultaneously, and then turned on for the router to power on.
Note
To avoid erroneous failure messages, allow at least 2 minutes for the system to reinitialize, after the fan
tray has been removed or replaced. This is applicable when the RSP1 and RSP2 modules are installed in
the chassis.
Caution
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. The figure below shows the front of the fan tray, including the captive installation screws.
Figure 22: 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.
Cisco ASR 903 and ASR 903U Aggregation Services Router Hardware Installation Guide
22
Installing the Cisco ASR 903 Router
Removing and Replacing the Fan Tray

Cisco ASR 903 Specifications

General

Brand	Cisco
Model	ASR 903
Category	Network Router
Language	English