Chapter 4 - Managing and Monitoring
Manual Override
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When this option is enabled, the software will control the RPM of the cooling fans based
on enclosure temperature parameters and its installed component.
For example, if any one or a combination of the following occurs, the cooling fan RPMs
will be set to the maximum software controlled RPM: a disk drive is removed from any of
the drive slots 4 through 9, a power supply is removed, one of the cooling fans in the
cooling fan module fails, a temperature sensor fails, or a SES processor fails.
Manual Override
A manual override of the fan speed control is available for special circumstance
environments. Referring to the illustration on the following page, two jumpers are provided
on the fan module printed circuit board to override the firmware control of the fan speeds.
This hardware setting provides full voltage to the fans for maximum operational speed,
which is greater than the maximum speed set by the automatic software control. This
configuration is normally used when fan speed noises are not an issue, and the ambient
operating temperature is at or above 30°C (86°F), thus ensuring that maximum available
cooling is being provided.
Cooling Fan Module
Ju m p e r s J P 1 a n d J P 2
Fa n S p e e d O ve r r i d e C o n t r o l
Summary of Contents for OMNISTOR 4000f SERIES
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