Patent ID: 8806877

Claim:
A refrigerating cycle apparatus comprising: not less than one heat source unit having at least a compressor and a heat source side heat exchanger; not less than one utilization unit having at least a pressure reducing device and a utilization side heat exchanger; a refrigerating circuit formed by connecting the heat source unit and the utilization unit via a liquid connection pipe and a gas connection pipe; a storage part that stores at least an appropriate refrigerant amount of a refrigerant to be charged in the refrigerating circuit and a correction coefficient which corrects a liquid refrigerant amount so that calculation of a refrigerant amount of each constituent element of the refrigerating circuit and the appropriate refrigerant amount become equal to each other; a measurement part that detects an operation state amount in each constituent element of the refrigerating circuit; a calculation part that calculates the refrigerant amount of each constituent element of the refrigerating circuit based on the operation state amount by using the correction coefficient; a comparison part that compares the appropriate refrigerant amount and a calculative refrigerant amount which is calculated by the calculation part; and a determination part that determines excess/shortage of a refrigerant amount charged in the refrigerating circuit based on a comparison result of the comparison part.