Replacing the SSA Fan Module

The SSA switch is cooled by two fan modules accessible from the power supply side of the unit. If the FAN LED and the output of the CLI show system command indicate that a fan module has failed, you must replace the failed fan module.

Note

SSA fan modules are hot-swappable. Do not uninstall a failed fan module until its replacement is available. All SSA switch components and cover plates must be installed to ensure proper airflow.

The replacement fan kit, SSA-FB-FAN, ordered separately, contains one replacement fan.

To replace a failed fan module, follow these steps:

1. Determine the location of the failed module using the label shown in Removing the Fan Module.
   

   Removing the Fan Module

   

   1 = Fan module screws

   2 = Fan module location label

2. Unscrew the two captive screws of the failed fan module as shown in Removing the Fan Module.
3. Following the discussion in Power Supply Airflow and Switch Fan Module Airflow, ensure that the new fan module airflow direction agrees with the installed SSA switch configuration.
4. If a non-default airflow is required, see Reversing the Fan Module Airflow for directions on how to reverse the fan unit direction.
5. When you have ensured that the fan module airflow is appropriate to your system configuration, slide the currently installed fan module forward until it is unplugged from the device as shown in Removing the Fan Module.
6. Align the new fan module with the fan module opening.
7. Insert the module into the fan module opening, applying enough pressure that the fan module is flush with the device.
8. Secure the two fan module captive screws.