The Princess Air Conditioning unit is automatic and will operate based on the temperature and mode selected. The cooling will stop once room temperature is reached and resume once the temperature increases again.
If you selected 22c as your room temperature, and the room is 30c, then the air conditioner will start the compressor and in around 5 minutes the cold air will begin to be produced.
Once the room reaches 22c the compressor will stop, this is to stop cooling below the 22c set. The fan will continue to circulate the air around the room.
Once the room temperature rises again then the compressor will automatically start again and cold air will once again be produced.
Should you want to the cooling to continue then set the temperature of the air conditioning unit lower to 20c and the same process will apply, only the compressor and cooling will stop once the room reaches 20c