Disclosed are an air conditioning system with two compressors and a method
for operating the same, so as to variably change a compression capacity of
a refrigerant according to the variation of cooling load. Herein, when a
full operation order is inputted to the two compressors in order to
satisfy increased cooling load, the first compressor is first operated,
and then the second compressor having a compression capacity of a
refrigerant smaller than that of the first compressor is additionally
operated, so that a current peak value for operating the compressors does
not exceed an allowable current range of a circuit breaker installed in a
home or building, thereby safely controlling the air conditioning system
and simultaneously allowing the current to be provided to other electric
appliances, thus improving users' convenience.