C H A P T E R
5
Replacing Modules
•
Replacing a Fan Module During Operations, on page 35
•
Replacing a Power Supply Module, on page 37
Replacing a Fan Module During Operations
There must always be at least two fan modules installed in the chassis to maintain the designed airflow. You
can remove one fan module temporarily to replace it with another fan module but if the replacement fan
module is not available, leave the original fan module in the chassis.
All fan and power supply modules must have the same airflow direction or else an error can occur with the
switch overheating and shutting down. You can determine the airflow direction of a fan module by the color
of the stripe on the front of the module. If the fan module has a blue stripe for port-side exhaust airflow, the
power supplies must have blue or gray coloring for the same airflow direction. If the fan module has a burgundy
stripe for port-side intake airflow, the power supplies must have burgundy or green coloring for the same
airflow direction. To avoid over heating the switch, make sure that the fan modules are positioned in one of
the following ways:
• For port-side exhaust airflow with blue coloring, position the fan modules in a cold aisle.
• For port-side intake airflow with burgundy coloring, position the ports in a cold aisle.
Before you begin
Before you can replace a fan module, ensure that both of the following conditions exist:
• There is another functioning fan module in the chassis. In order to replace a fan module during operations,
there must be another fan module circulating air in the chassis at all times.
• The replacement fan module must have the same airflow direction as the other modules in the chassis.
If you must replace the fan module during operations and both of the above conditions are not met, leave the
fan module that you need to replace in the chassis to preserve the designed airflow until you have the required
module.
Step 1
Remove the fan module that you need to replace as follows:
a) Unscrew the captive screw that secures the fan module to the chassis (see the following figure).
Cisco Nexus 9336PQ ACI-Mode Switch Hardware Installation Guide
35
