Avago Technologies 3ware SAS 9750-16i4e - Manual (Page 295)

Error and Notification Messages
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8022 Enclosure temp high
Event Type
Warning.
Cause
Applies to 9750 and 9690SA controllers.
The enclosure temperature is higher than normal.
Action
Take steps to lower the enclosure temperature, such as adding fans, clearing
enclosure openings of blockages, and increased ventilation.
Make sure that the enclosure environment does not get any hotter. See your
enclosure documentation or contact your enclosure manufacturer to ensure
that you are adhering to proper operating conditions and environments.
8023 Enclosure temp below operating
Event Type
Information.
Cause
Applies to 9750 and 9690SA controllers.
The enclosure temperature is below the enclosure manufacturer’s specified
operating temperature.
Action
In general, cooler operating temperatures are good for enclosure components.
However, if the temperature is very cold, condensation can occur and cause
media errors and damage. Take steps to bring the operating environment back
within the enclosure manufacturer’s specifications.
Allow cold equipment to warm up gradually before powering on.