In split air conditioners, there are two tubes connecting the indoor unit and the outdoor unit. According to the generic schematics I find online (like this one), they are part of the closed circuit for coolant gas.
But most systems have a "dry" function that removes moisture from air. Where does the water goes, if there is no water/air connection between the indoor and the outdoor units? Or the tubes function is different from what the drawing shows, and there is indeed a water line, then how the coolant flows between the indoor and outdoor units?
PS: I could use a "heat-pump" tag here.