Replacing The Fan - Cisco D9477-1 Installation And Operation Manual

Replacing the Fan

WARNING:
Avoid damage to this product! Replace the dual fan unit only with a genuine
replacement fan unit from Cisco. Contact Cisco Services to order replacement
fan units.
1 Are the cables connected to the back panel long enough to allow you to slide the
MQAM forward into the rack to sufficiently access the side panel where the fan
units are located?

If yes, carefully remove the screws that secure the MQAM in the rack, and
carefully slide the MQAM forward in the rack until you can access the fan
units. Then, go to step 5.

If no, go to step 2.
2 If you cannot slide the MQAM forward in the rack because some or all of the
cables in the rack are not long enough to access the fan, wait to replace the fan
until you have a maintenance window. Then, choose one of the following
options:

If some of the cables are not long enough, you must power off the MQAM and
disconnect any cables that are not long enough.
 If all of your cables are too short, you must power off the MQAM and
disconnect all the cables, including the power cable.
Remove the screws that secure the MQAM in the rack. Then, remove the MQAM
3
completely from the rack to replace the fan unit.
After removing the MQAM, place it carefully on a sturdy flat surface.
4
5 Carefully remove the screws that secure the 9-pin connector to the side panel and
place them in a safe location nearby.
6 Carefully remove the screws and sleeves that secure the fan unit to the side panel
and place them in a safe location nearby.
78-717866-01 Rev D
CAUTION:
You must be able to externally support the MQAM with a cart or table
or with the assistance of another person when you slide the chassis
forward in the rack.
Replace the Fan
67