| 摘要 |
PURPOSE:To effect a trouble diagnosis accurately by a method wherein a time when an abnormal state occurs can be acknowledged with a less number of component parts. CONSTITUTION:There are provided a plurality of indoor devices (3, 3,...) for carrying out an air conditioning operation and each of the indoor devices (3, 3,...) is connected through a signal line (11). There is also provided an abnormal state sensing means (32) for sensing an abnormal state and outputting an abnormal state indicating signal. There is further provided one schedule timer (5) for outputting a time signal in such a way that each of the indoor devices (3, 3,...) takes a time data indicating a present time. In addition, each of the indoor devices (3, 3,...) is provided with a memory means (35) for receiving an abnormal signal of the abnormal state sensing means (33) and a time signal of the schedule timer (5) and storing a content of abnormal state and a time of occurrence of abnormal state.
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