The JRCS FCU-M003B is a digital fan coil unit controller designed for precise climate control within marine accommodation spaces. Engineered for reliability in demanding maritime environments, it allows for individual cabin temperature management by regulating both fan speed and the flow of hot or cold water. The unit features a clear digital display and an intuitive user interface for setting the desired temperature and fan speed (High, Medium, Low). Its robust construction and sophisticated control logic ensure a comfortable environment for crew and passengers, making it a standard component in modern vessel air conditioning systems.