CoolingCooling
SubtopicsSubtopics
Fan mode behaviorFan mode behavior
Installing high-performance fansInstalling high-performance fans
Fan mode behaviorFan mode behavior
CAUTION:CAUTION: To avoid damage to server components, fan blanks must be installed in fan bays 1 and 2 in a single-processor
configuration.
CAUTION:CAUTION: To avoid damage to the equipment, do not operate the server for extended periods of time if the server does not
have the optimal number of fans installed. Although the server might boot, Hewlett Packard Enterprise does not
recommend operating the server without the required fans installed and operating.
Valid fan configurations are listed in the following table.
ConfigurationConfiguration Fan bay 1Fan bay 1 Fan bay 2Fan bay 2 Fan bay 3Fan bay 3 Fan bay 4Fan bay 4 Fan bay 5Fan bay 5 Fan bay 6Fan bay 6
1 processor Fan blank Fan blank Fan Fan Fan Fan
1 processor 24-
SFF or 12-LFF
configuration
with high-
performance
fans
Fan Fan Fan Fan Fan Fan
2 processors Fan Fan Fan Fan Fan Fan
For a single-processor configuration, excluding 24-SFF and 12-LFF configurations, four fans and two blanks are required in specific fan bays
for redundancy. A fan failure or missing fan causes a loss of redundancy. A second fan failure or missing fan causes an orderly shutdown of
the server.
For a dual-processor configuration or single-processor 24-SFF or 12-LFF configurations, six fans are required for redundancy. A fan failure
or missing fan causes a loss of redundancy. A second fan failure or missing fan causes an orderly shutdown of the server.
High-performance fans might be necessary in 24-SFF and 12-LFF configurations for the following installations:
Optional GPU riser installations
ASHRAE compliant configurations
For more information, see the Hewlett Packard Enterprise websiteHewlett Packard Enterprise website .
The server supports variable fan speeds. The fans operate at minimum speed until a temperature change requires a fan speed increase to
cool the server. The server shuts down during the following temperature-related scenarios:
At POST and in the OS, iLO performs an orderly shutdown if a cautionary temperature level is detected. If the server hardware detects a
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