Cisco NCS 560-4

If a fan tray is removed and not replaced within the stipulated time the system will automatically power-off.
There should be a minimum time period of 15 seconds between fan tray removal and re-insertion of the fan
trays during the operation of the system. See the Online Insertion and Removal (OIR) section.
Note
Ensure that you keep your fingers, clothing, and jewelry away from the fans when installing or removing the
fan tray module. Exposed circuitry is an energy hazard.
Note
To avoid erroneous failure messages, allow at least two minutes for the system to reinitialize after the fan tray
has been replaced.
Caution
Before you begin
To remove the master fan tray when the cables from the power supplies cross over and across the fan tray,
gently lower the cables to clear enough space and remove the fan tray from the chassis as mentioned in steps
1–4.
To remove the slave fan tray when the cables from the interface module and the RSP cross over and across
the fan trays, gently lift the cables to clear enough space and remove the fan trays from the chassis as mentioned
in steps 5–8.
Table 13: Online Insertion and Removal - Parameters
CommentsOIR TimeFan SpeedAmbient
10
OIR Module
Single Fan Fail,
Other Fans running
at 100% PWM
5 mins100% PWM30°CFan Tray
11
3 mins100% PWM40°C
10
It is not recommended to perform OIR of any module above 40°C ambient
11
Fan Tray OIR should be performed only when a fan's failed condition is encountered and other fans are
spinning at max speed.
Procedure
Step 1 Slip on the ESD-preventive wrist strap that was included in the accessory kit.
Step 2 Using a No. 2 Phillips screwdriver, loosen the captive installation screw that secures the master fan tray to
the router.
Step 3 Grasp the fan tray handle of the master fan tray (N560-4-FAN) with one hand and the outside of the chassis
with the other hand.
The fans are exposed on the right side of the fan tray. Keep your fingers, clothing, and jewelry away
from the fans. Always handle the fan tray by the handle.
Caution
Step 4 Pull the fan tray toward you no more than 1 inch to disengage it from the power receptacle on the midplane.
Cisco NCS 560-4 Router Hardware Installation Guide
81
Installing the Cisco NCS 560-4 Router
Removing and Replacing the Fan Trays