Cooling Overview

Fan speed is displayed in RPM. Error log is asserted when fan speed is below lower critical threshold.

Note

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Figure 1. Cooling Overview

• Status (two status):

  • Healthy condition:

  • Fault condition:

    
• Fan_Tach_#A(B):

  • When the number(#) equals to 2, 3 or 4, system fan speed normally operates at 2000 - 18500rpm.

  • When the number(#) equals to 1 or 5, system fan speed normally operates at 2000 - 13000rpm.

  D2 Enclosure system fan is equipped with dual motor. Tach A displays the primary fan motor speed and tach B displays the redundant fan motor speed.

• Lower Critical: 768 rpm is set to be the lower critical fan speed threshold.