Abstract: A method for controlling operations of an air-conditioner includes: a step in which when an operation load of an air-conditioner increases, if an outputted compressing capacity of the air-conditioner is smaller than a compressing capacity corresponding to the operation load and an operation frequency of the first compressor is a maximum frequency of the first compressor, a second compressor is operated; and a step in which when the operation load is reduced, if the outputted compressing capacity of the air-conditioner is greater than the compressing capacity corresponding to the operation load and the operation frequency of the first compressor is a minimum frequency of the first compressor, the second compressor is stopped.

Abstract: A method for controlling operations of an air-conditioner includes: a step in which when an operation load of an air-conditioner increases, if an outputted compressing capacity of the air-conditioner is smaller than a compressing capacity corresponding to the operation load and an operation frequency of the first compressor is a maximum frequency of the first compressor, a second compressor is operated; and a step in which when the operation load is reduced, if the outputted compressing capacity of the air-conditioner is greater than the compressing capacity corresponding to the operation load and the operation frequency of the first compressor is a minimum frequency of the first compressor, the second compressor is stopped.

Abstract: Disclosed is a method for operating an air conditioner in a warming mode, including the 100% operation performing step of operating/stopping all of compressors, the load determining step of determining a warming load to be eliminated after completion of the 100% operation performing step, the 100%/X% operation performing step of operating all of the compressors when it is determined at the load determining step that the warming load is not large, subsequently stopping a part of the compressors, and subsequently stopping the remainder of the compressors, the sensing step of sensing the number of stoppages of the remainder of the compressors after completion of the 100%/X% operation performing step, and the X% operation performing step of operating/stopping the remainder of the compressors when the sensed number of stoppage times reaches a predetermined number.