Fan failed logs on X450a

[AEM91]

04/17/2019 07:31:32.94 Switch: Fan tray 1, fan #5, is operational. RPM (1000) is back to operating range which is at or above 1000. (X450a-48t, P/N: 800302-00-04, S/N: 1302G-xxxxx, Rev: 4.0)
04/17/2019 07:24:02.96 Switch, Code 5: Fan tray 1, fan #5, has failed. RPM (0) is out of operating range which is at or above 1000. (X450a-48t, P/N: 800302-00-04, S/N: 1302G-xxxxx, Rev: 4.0)

02/21/2019 06:07:02.95 Switch: Fan tray 1, fan #5, is operational. RPM (1000) is back to operating range which is at or above 1000. (X450a-48t, P/N: 800302-00-04, S/N: 1302G-xxxxx, Rev: 4.0)
02/21/2019 06:03:02.92 Switch, Code 5: Fan tray 1, fan #5, has failed. RPM (0) is out of operating range which is at or above 1000. (X450a-48t, P/N: 800302-00-04, S/N: 1302G-xxxxx, Rev: 4.0)


i receive those logs on our switch one time every month & for very short period (less than 1 min), how can i investigate further & what action should i do ?

[AEM91]

Thanks 

[Ty_Izzet]

Appears that fan#5 is fluctuating off and on. This could be a failed fan overall. To rule out other possibilities, try power cycling the switch/run extended diagnostics, ensure the air vents are clear, and ensure the code is on 15.3 latest. If the above is complete and the issue recurs, raise a case with GTAC for further action.