For cooling only unit, the available modes are: COOL ( ), DRY ( ) and FAN ( ). For heat pump unit, the available modes are: AUTO ( ), COOL ( ), DRY ( ), FAN ( ) and HEAT ( ). The AUTO ( ) mode is unavailable for chilled water system except 4-pipe system. Automatic air swing Press the SWING button to activate the automatic air swing function.Daikin heat pumps are quiet and discreet, and use state-of-the-art technology to keep your energy bills the operation mode, airflow and temperature settings. Should DRY Program Dry Function. This gives priority to reducing the level of humidity in the room rath - er than room temperature. Q5Men.