Avago Technologies 3ware 9650SE-12ML (Channel) - Manual (Page 315)

Error and Notification Messages
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Cause
Applies only to the 9690SA controller.
The enclosure is unable to recognize the fan. The fan may not be seated
correctly or may be malfunctioning.
Action
Reseat the fan.
If it is necessary to replace the fan, see your enclosure documentation or
contact your enclosure manufacturer.
8005 Enclosure fan off
Event Type
Warning.
Cause
Applies only to the 9690SA controller.
An enclosure fan has been turned off. It is no longer cooling the enclosure.
Action
The enclosure normally controls the on/off function of the fan. If there is no
over-heating problem, no action is necessary.
8020 Enclosure temp normal
Event Type
Information.
Cause
Applies only to the 9690SA controller.
The enclosure temperature is now back within the acceptable range.
Action
None required.