Andy M. said:
Suggesting settings for an AC unit isn't practical under these conditions.
We don't know the size of the room, the capacity or location of the AC unit, the amount and type of furniture in the room, the amount of insulation in the walls and roof and the temperature outside.
An air conditioner does two things, cool the air and dehumidify it. Actually, cooling the air reduces its ability to hold moisture, which condenses and is discarded leaving you with cold and dry air.
The function of the fan is to circulate the air in the room to make temperatures uniform throughout all parts of the room. A higher speed fan setting will circulate the air faster, cooling all parts of the room faster up to the capacity of the AC unit.
Most AC units have an automatic temperature setting so it will work as necessary to maintain the temperature you set.