Air Conditioning System, Abnormality Estimation Method For Air Conditioning System, Air Conditioner And Abnormality Estimation Method For Air Conditioner

Abstract: This air conditioner has a refrigerant circuit configured such that at least one indoor unit is connected to an outdoor unit with refrigerant piping. The air conditioner has a detection unit which detects a state quantity relating to control of the air conditioner, and an acquisition unit which acquires the state quantity detected value detected by the detection unit. Furthermore, the air conditioner has an abnormality estimation unit which, when the state quantity relating to an abnormality in the refrigerant circuit is set to the feature quantity, uses the detected value of said feature quantity to estimate the occurrence of an abnormality in the refrigerant circuit. The abnormality estimation unit estimates the occurrence of abnormalities in the refrigerant circuit for each pair consisting of one indoor unit and the outdoor unit, and, in the case of estimating that an abnormality has occurred in any pair, estimates that the abnormality has occurred in the indoor unit of said pair. Furthermore, in the case of estimating that an abnormality has occurred in all pairs, the abnormality estimation unit estimates that the abnormality has occurred in the outdoor unit. As a result, it is possible to detect whether an abnormality has occurred in an indoor unit or the outdoor unit.

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