Replace Fan Modules

Before you begin, have the replacement fan module on hand so that you can complete the replacement promptly. The switch can overheat if left without adequate cooling for an extended time.

You can replace fan modules as needed while the switch is operating ("hot swapping").

All installed fan modules must blow air in the same direction and must match the airflow direction of the installed power supplies.

If the switch's fan tray has a blue tab, the airflow is front-to-back. Use a fan module labeled Air Out.
If the switch's fan tray has a green tab, the airflow is back-to-front. Use a fan module labeled Air In.

Note

The operating-system software cannot display the airflow direction.

Identify the Airflow Direction

The power supply and fan assemblies are identified by the following airflow directions:

Intake power supply and fan assembly with an orange "I" label or without any label: Pulls air from the nonport-side of the switch and exhausts it out the port side.


	Nonport-side air intake Port-side air exhaust Back-to-front (nonport-side to port-side) airflow Part numbers ending with -R

Exhaust power supply and fan assembly with a green "E" label: Pulls air from the port side of the switch and exhausts it out the nonport-side.


	Nonport-side air exhaust Port-side air intake Front-to-back (port-side to nonport-side) airflow Part numbers ending with -F

You can check the top view of the switch to ensure proper groove alignment:
Airflow groove alignment (front-to-back shown)

Replace Fan Modules

Gently pull the tab (labeled Air Out or Air In) on the end of the fan module.
The fan module is held in place by spring clips. As you pull, the clips will disengage and the fan will stop.
Slide the fan module out of the switch and set it aside.
Verify that the airflow direction on the replacement fan module matches that of the installed fan modules.
Fans with front-to-back airflow have red tabs and are labeled Air Out.

Fans with back-to-front airflow have blue tabs and are labeled Air In.
Carefully slide the replacement fan module into the switch.
Note
Do not force the installation. If the fan assembly does not slide in easily, ensure that it is correctly oriented before continuing.

Push until the fan module snaps into place. The fan will automatically start to operate.

When a fan assembly is installed in a slot, the power LED on the fan assembly should turn on green to confirm that the fan assembly is correctly installed and running. Refer to Monitor the Device.