Disclosed are a defrosting apparatus of an air conditioner and a method thereof. Herein, additional encoding is performed on mobile service data, which are then transmitted, thereby providing robustness in the processed mobile service data, so that the mobile service data can respond more strongly against fast and frequent channel changes. In one embodiment, a control unit is coupled to the rotor blade to adjust an angle of incidence of the at least one adjustable rotor blade using information which is representative of the wind direction, the azimuthal position of the rotor, and the deviation from vertical of the pylon.