Note- Place the removed f an unit on a grounded antistatic ESD mat.
Note- Do n ot force the fan unit into the slot. Using excessive force may damage the
component or the chassis.
Note- Check that the fan unit is fully inserted and secured.
19.5 Installing a Fan Unit
Thissectio n describes the procedure for installing a fan unit.

19.5.1 Installing a fan unit

1. Carefullyinsert the fan unit into its slot.
2. Pushthe fan unit fully home.

19.5.2 Restoring the chassis

1. Install the front cover.
For details, see "6.5.3 Installing the front cover."
19.6 Restoring the System
Thissectio n describes the procedure for restoring the system after installing a fan
unit.T he restoration procedure differs depending on the maintenance type as follows:
■Active/Hot maintenance
■Inactive/Hot maintenance
■System-stopped maintenance
Chapter19 Maintainingthe Fan Units of the Crossbar Box 333