Oracle SUN X4-8 Service Manual page 115

Data Loss. Do not remove more than one fan module from a column while the system
Caution -
is in full power mode. This action removes power from the CMODs and causes an immediate
shutdown. On an eight-CMOD system, this applies to all fan modules. On a four-CMOD
system, this applies to the fan modules in the left-hand fan frame (CMODs 0-3).
4. To remove the fan module, pull it out of the slot.
Electrical hazard. During a hot-service procedure, voltage is present. Do not reach
Caution -
into the vacant fan module slot with your hand or any object. Do not touch the exposed CMOD
fan module power connector.
When the fan is removed from the slot, a hinged air vane drops down to close the slot. The vane
maintains system cooling and prevents a disruption of server airflow during hot service.
Remove a Fan Module
Servicing Components 115