Avago Technologies 3ware SAS 9750-16i4e - Manual (Page 300)

Chapter 12. Troubleshooting
288 3ware SATA+SAS RAID Controller Card Software User Guide, Version 10.2
Action
Check to be sure the power supply is operational by re-seating or replacing
the failed power supply. See your enclosure documentation or contact your
enclosure manufacturer for more information.
It is recommended to use an uninterruptible power supply (UPS) to protect
against power failures.
8037 Enclosure power off
Event Type
Warning.
Cause
Applies to 9750 and 9690SA controllers.
An enclosure power supply has been turned off.
Action
If needed for power supply redundancy or to meet power requirements, turn
the power supply back on.
It is recommended to use an uninterruptible power supply (UPS) to protect
against power failures.
8040 Enclosure voltage normal
Event Type
Information.
Cause
Applies to 9750 and 9690SA controllers.
The enclosure power supply voltage is now back within the acceptable range.
Action
None required.