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.



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:

Replace Fan Modules

  1. 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.

  2. Slide the fan module out of the switch and set it aside.
  3. 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.

  4. Carefully slide the replacement fan module into the switch.


    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.