This instruction covers the meaning of the indercator lights on the front of the AC200/300 control system.
The Airmaster controller uses indicator lamps (three-colour LEDs) to display the status of the propeller and control system. These lamps are labelled ‘FINE’, ‘COARSE’ and ‘FEATHER’ / ’BETA’ (options) on the controller front panel; they indicate the drive states of the controller and the propeller’s pitch limit stops.
Controller Status Indicators 
