Fans in 3820 720 stream constantly run at high speed with lot of noise (Doc ID 2114204.1)

Last updated on MAY 12, 2017

Applies to:

Acme Packet 3820 - Version S-Cz7.1.5 and later
Information in this document applies to any platform.

Goal

Customer reported that fans constantly run at high speed with lot of noise. They were using 3820 SBC with nnSCZ720m2.32.bz version.

Fan RMA didn't help.

║ @ ACMESYSTEM# show fans
║ @ MAIN FAN1: +15300.000 RPM
║ @ MAIN FAN2: +15300.000 RPM
║ @ MAIN FAN3: +15300.000 RPM
║ @ MAIN FAN4: +15300.000 RPM
║ @ .
║ @ ACMESYSTEM# show temperature
║ @ CPU TEMP0 +47.750 C (high = +100.000 C)
║ @ MAIN TEMP0 +25.000 C (high = +100.000 C)
║ @ MAIN TEMP1 +23.500 C (high = +100.000 C)
║ @ PHY TEMP0 +25.500 C (high = +100.000 C)
║ @ PHY TEMP1 +25.500 C (high = +100.000 C)
║ @ PHY FPGA TEMP0 +28.000 C (high = +100.000 C)
║ @ PHY TCM0 +30.500 C (high = +80.000 C)


 

Solution

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