There are 4 main modes:
Auto mode –Based on outside temperature, the AC will decide the temperature according to it and that work is done by the air conditioners itself.
Cool Mode – You have to do this manually by selecting the temperature of the room you want.
Dry Mode – This is mainly used during humid weather which makes the dehumidifier active.
Fan Mode – When you feel that your room has become cool enough, then you can switch on to this option for circulating the cold air across the room.