An air conditioner system including an air conditioner unit having a first operating mode in which the air conditioner unit is operated to effect one of cooling and heating, and a second operating mode in which the air conditioner unit is operated to effect the other of cooling and heating, the air conditioner system including a main body of the air conditioner unit, the main body comprising a casing accommodating a heat exchanger, a fan, and electrical parts; and a first graphic-bearing panel detachably fitted to the front surface of the main body of the air conditioner unit, the first graphic-bearing panel comprising a plurality of ribs forming slits penetrating from an obverse surface of the first panel to a reverse surface of the first panel, and displaying a first visual cue of one of coolness and warmth on the horizontal ribs, the first visual cue of the first graphic-bearing panel matching the effect provided by the first operating mode.