The fan speed is displayed as 0 in the system log

SYS: Abnormal speed: fan1=0!

The fan is not always running to dissipate heat. Since it takes a few seconds for the fan to start from idling, it will detect that the fan speed is 0 and an abnormal fan speed message will appear.

Users can upgrade the firmware version to v2.8.272 or later to fix this issue.