This just happened for me on 8.5.161.0. I have never seen it before we upgraded to 8.5.161.0 4-5 days ago.
There is nothing in the logs when logging on to the CIMC
August 9, 2020, 2:26:33 PM Central European Summer Time - Critical - Power supply status changed.
August 9, 2020, 2:26:33 PM Central European Summer Time - Critical - Power supply status changed.
August 9, 2020, 2:20:55 PM Central European Summer Time - Major - The sensed temperature on the Controller '****' is too high. The current sensed temperature is '41'.
August 9, 2020, 2:16:33 PM Central European Summer Time - Critical - Fan failure. Controller '****'.
August 9, 2020, 2:16:33 PM Central European Summer Time - Critical - Fan failure. Controller '****'.
August 9, 2020, 2:16:33 PM Central European Summer Time - Critical - Fan failure. Controller '****'.
August 9, 2020, 2:16:33 PM Central European Summer Time - Critical - Fan failure. Controller '****'.
August 9, 2020, 2:16:33 PM Central European Summer Time - Critical - Fan failure. Controller '****'.
August 9, 2020, 2:16:33 PM Central European Summer Time - Critical - Fan failure. Controller '****'.
August 9, 2020, 2:16:33 PM Central European Summer Time - Critical - Fan failure. Controller '****'.
August 9, 2020, 2:16:33 PM Central European Summer Time - Critical - Fan failure. Controller '****'.
August 9, 2020, 2:16:33 PM Central European Summer Time - Critical - Fan failure. Controller '****'.
August 9, 2020, 2:16:33 PM Central European Summer Time - Critical - Fan failure. Controller '****'.
August 9, 2020, 2:16:33 PM Central European Summer Time - Critical - Fan failure. Controller '****'.
August 9, 2020, 2:16:33 PM Central European Summer Time - Critical - Fan failure. Controller '****'.
August 9, 2020, 2:01:55 PM Central European Summer Time - Critical - Power supply status changed.
August 9, 2020, 2:01:55 PM Central European Summer Time - Critical - Power supply status changed.