OPERATION CONTROLLING METHOD FOR AIR CONDITIONER

PURPOSE: To perform cooling stopping the operation of a.compressor by controlling ON, OFF a chilled water circulation pump of a chilled water circulating circuit before the compressor is stopped when a refrigerant circulating circuit becomes overload. CONSTITUTION: When a refrigerant circulating circuit becomes overload during the operation of a cooling side circuit, the temperature and the pressure of high-pressure refrigerant fed from a compressor 1 to an evaporation type condenser 2 are raised, and the increase of the load of the condenser 2 by a predetermined amount or more from that at the time of normal operation is detected, the overload control is started, and a chilled water circulating pump 10 is stopped. The refrigerant circuit is operation in this state, i.e., the operation of the compressor 1 is continued, hence chilled water circulating amount becomes 0 (l/min), the chilled water is stayed in a chilled water generator 6 to cool the evaporator 4. Accordingly, the vapor pressure and the vapor temperature of the refrigerant are lowered, the return refrigerant from the evaporator 4 to the accumulator 5 become gas-liquid mixed state, and the compressor 1, i.e., the load of the refrigerant circuit is reduced to be operated.