Replacing Modules; Replacing A Fan Module During Operations - Cisco Nexus 93120TX Installation Manual

Replacing Modules

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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. A blue stripe indicates a port-side exhaust airflow direction and a
burgundy stripe indicates a port-side intake airflow direction (DC power supplies have a green stripe for
port-side intake airflow). 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 burgundy coloring, position the fan modules in a cold aisle.
• For port-side intake airflow with blue 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,
• The replacement fan module must have the same airflow direction as the other modules in the chassis.
Replacing a Fan Module During Operations, page 35
Replacing a Power Supply Module, page 38
there must be another fan module circulating air in the chassis at all times.
If the other modules have blue coloring, the replacement fan module must have blue coloring. If the
other modules have a burgundy coloring (or the DC power supplies have green coloring), the replacement
fan module must have burgundy coloring.
C H A P T E R
Cisco Nexus 93120TX NX-OS Mode Switch Hardware Installation Guide
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