Replace A Fan Tray - Cisco 8800 Series Hardware Installation Manual

Replace a Fan Tray

c) Rotate the ends of the two levers toward the center of the chassis.
When the levers point straight out from the chassis, their other ends should be locked onto the brackets
on the side of the chassis.
As you rotate the levers, the front of the module moves all the way to the front of the chassis and the
module fully seats on the chassis.
d) Tighten the two captive screws to 8 in-lb (0.9 Nm) torque.
e) Attach each interface cable to the appropriate port on the line card. Use the label on each cable to determine
which port each cable attaches to.
f) Verify that the line card LEDs turn on and appear green.
Replace a Fan Tray
You can remove a fan tray (8818-FAN, 8812-FAN or 8808-FAN) to either replace it with another fan tray or
to replace a fabric card located behind it.
The router uses four fan trays but it can operate with three fan trays while you replace one or remove one to
replace one of the fabric cards behind the fan tray. When you remove one fan tray, the other fan trays speed
up their fans to maintain the designed airflow.
Note If you cannot replace a fan tray within three minutes, we recommend that you leave it in the chassis until you
are ready to replace it.
Note
Never remove two fan trays at a time during operation, the router allows up to two minutes of operations
before shutting down unless you replace the missing fan tray within that time. If the router senses an over
temperature condition when multiple fan trays are removed, the shutdown can occur in less than two minutes.
To replace a fan tray, you must perform the following functions:
1. Remove the fan tray.
2. Install a fan tray.
Hardware Installation Guide for Cisco 8800 Series Routers
90
1 Rotate the ejector handle on each end of the
module away from the center of the chassis.
2 Align the bottom of the back of the module
with tracks on either side of the slot.
Replace Chassis Components
3 Slide the module all the way into the slot.