Avago Technologies 3ware SAS 9750-16i4e - Manual (Page 292)

Chapter 12. Troubleshooting
280 3ware SATA+SAS RAID Controller Card Software User Guide, Version 10.2
8001 Enclosure fan error
Event Type
Error.
Cause
Applies to 9750 and 9690SA controllers.
The enclosure fan is not functioning normally and may be blocked or
defective.
Action
Check that the fan or fans are not blocked. If a fan appears defective, replace
it as soon as possible.
For information on replacing a fan, see your enclosure documentation or
contact your enclosure manufacturer.
8002 Enclosure fan removed
Event Type
Warning.
Cause
Applies to 9750 and 9690SA controllers.
A fan has either been removed or has become unplugged.
Action
Replace or reseat fan and make sure it is operational. An insufficient number
of operating fans may lead to overheating of the components in the enclosure.