Daikin ducted systems are usually run from a wired wall controller rather than the handheld remote used on wall-mounted units. The display typically shows the current mode (heat, cool, fan, or dry), the set temperature, and a fan speed indicator, along with a filter sign that lights up once the system's internal filter timer reaches its limit.On zoned systems, the controller also shows which zones are currently active, usually as a row of numbered or lettered indicators corresponding to each ducted area of the house.An error code display, usually a letter and number combination, means the system has detected a fault and needs professional attention rather than a reset.