Samsung MIM-B14 External Contact Control module controls an indoor unit (ON/OFF) via 0V dry contact. It also provides an operation and error output as well as various other indoor unit operations depending on indoor unit series and model (EX: DVM S supplemental heat control and unoccupied room control). MIM-B14 can also install in DVM S outdoor units to monitor system ON/OFF status, error status, and to manually enable night time quiet operation mode.