the fan status leds on the switch chassis and on each fan try indicate when one or more fans fail. in this case, simply replace the failed component as soon as possible.

    for safety, if you are hot swapping out the fan tray assembly, pull the assembly out one-inch and allow the fans to stop rotating before pulling it all the way out.

    to replace a fan tray:

    1. remove the two screws holding the failed fan tray assembly. (the led on the fan tray and on the chassis will indicate which one is failed.)

    2. pull the fan tray assembly out.

    3. install the new fan tray assembly as described.

    in case your cabling installation does not allow access to the fan tray assemblies, remove as many cables as necessary in order to access them.