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Subject :
	KN / Abnormal fan speed

Description :
	The fan speed is displayed as 0 in the system log SYS: Abnormal speed: fan1=0!

Solution :
	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.

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