You can turn on or off the buzzer sound to notify you when you set or change the function of the air conditioner.
Press and hold the Ionizer button for about 3 seconds to set mute function.
Set the function each time, the function changes on and off.
When the Mute is set, OF appears for a moment on the display of some indoor units and the buzzer sound is turned off.
This function may operate differently depending on the model.