| 摘要 |
PROBLEM TO BE SOLVED: To provide high-reliability air-conditioning system, without impairing original operation property of a centralized control device, even when abnormality occurs. SOLUTION: An air-conditioning system is constructed with a group of air conditioners each constructed with indoor machines 3a to 3e and outdoor machines 4a to 4c, and a centralized control device 1, which can simply grasp operation information of the group of the air conditioners and can transmit the control of operation and interruption all at once to a group of those air conditioners.
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