Fan Failure

This section describes the system behavior in various fan failure and overtemperature conditions.

Single Fan Failure

• If a single system or power supply fan failure occurs, the system will attempt to adjust fan speeds to maintain system temperatures below maximum thermal limits. Supermicro does not claim system fan redundancy in the SYS-822GA-NGR3.

• If a system configuration supports fan redundancy and a single fan failure occurs, the system's Status LED will blink green and the event is logged to the system event log. The integrated platform management will automatically adjust fan speeds to maintain system temperatures below maximum thermal limits.

Overtemperature Conditions

• If system temperatures continually increase and the system fans are operating at their maximum speed, platform management may throttle the bandwidth of the memory subsystem, the processors, or both to prevent overheating and keep the system operational. Throttling of these subsystems will continue until system temperatures are reduced below preprogrammed limits.

• The power supply is protected against overtemperature conditions caused by excessive ambient temperature. In an overtemperature protection condition, the power supply module shuts down.

• If system thermals are above the maximum thermal limits, the system shuts down, the system's Status LED will display solid amber, and the event is logged to the system event log. If power supply thermals are above their maximum thermal limits or if a power supply fan fails, the power supply shuts down.