Fan is using auto mode
Fan using high speed
Fan using low speed
If the fan supports 2 or more speeds, the Low value shall be supported.
The Low value shall be supported if and only if the FanModeSequence attribute value is less than 4.
Fan using medium speed
If the fan supports 3 or more speeds, the Medium value shall be supported.
The Medium value shall be supported if and only if the FanModeSequence attribute value is 0 or 2.
Fan is off
Fan is using smart mode
See
MatterSpecification.v13.Cluster § 4.4.5.5