You do not have to shut down or remove power from the server to replace fan modules because they are hot-
swappable. However, to maintain proper cooling, do not operate the server for more than one minute with
any fan module removed.
Caution
Step 1
Remove an existing fan module:
a) Slide the server out the front of the rack far enough so that you can remove the top cover. You might have to detach
cables from the rear panel to provide clearance.
If you cannot safely view and access the component, remove the server from the rack.
Caution
b) Remove the top cover from the server as described in
Removing the Server Top Cover, on page 30
.
c) Grasp the fan module at its front and rear finger-grips. Lift straight up to disengage its connector from the motherboard.
Step 2
Install a new fan module:
a) Set the new fan module in place. The arrow printed on the top of the fan module should point toward the rear of the
server.
b) Press down gently on the fan module to fully engage it with the connector on the motherboard.
c) Replace the top cover to the server.
d) Replace the server in the rack, replace cables, and then fully power on the server by pressing the Power button.
Replacing Memory DIMMs
DIMMs and their sockets are fragile and must be handled with care to avoid damage during installation.
Caution
Cisco does not support third-party DIMMs. Using non-Cisco DIMMs in the server might result in system
problems or damage to the motherboard.
Caution
To ensure the best server performance, it is important that you are familiar with memory performance guidelines
and population rules before you install or replace DIMMs.
Note
DIMM Population Rules and Memory Performance Guidelines
This topic describes the rules and guidelines for maximum memory performance.
DIMM Slot Numbering
The following figure shows the numbering of the DIMM slots on the motherboard.
Cisco APIC M3/L3 Server Installation and Service Guide
43
Maintaining the Server
Replacing Memory DIMMs
