travels through a coil to chill in the refrigerator part, goes to the ice unit where it fills an ice cube tray and then the tray freezes the cubes. The cubes are then dumped into the bin for use.
Somewhere something is wrong with your system if you are filling the bin with water. Either you are missing parts or the ice cube tray is overfilling but you don’t mention a tray.
It would probably be best to call a repair shop to check it out.