Abstract: An air conditioning system includes a plurality of air conditioners to which electric power, temperature detection sensors for respectively detecting interior temperatures in air conditioning regions corresponding to the air conditioners, a temperature storage section for storing control temperatures of the plurality of air conditioners and the detected interior temperatures, a power restoration detection section for detecting that power supply is restored after power interruption, and an initiation timing setting section for, in a case where power restoration is detected, comparing the stored control temperatures with interior temperatures detected after power restoration or before power interruption and stored in the temperature storage section, and setting initiation timings of the air conditioners such that the air conditioner corresponding to the air conditioning region having a larger air conditioning load based on a difference between the temperatures is initiated earlier.

Abstract: Disclosed is an airconditioner monitoring system in which a monitoring unit (11) sends, upon receipt of a malfunction code from an airconditioner (12), the malfunction code to a database server (41) via a LAN (2) and via the Internet (3). The database server (41) checks the received malfunction code against a database (41a) and sends information about the malfunction to the monitoring unit (11). The monitoring unit (11) displays the received malfunction information.

Abstract: A plurality of remote control groups (GR) each have a plurality of indoor units (20, 20, . . . ) designated as a single master unit (2a) and as slave units (2b) cooperating with the master unit (2a). A central monitor board (30) is provided for communicating control signals with each of the indoor units (20, 20, . . . ). A memory of the central monitor board (30) has a type area (M2) for storing type data representing that each indoor unit is a master unit (2a) or a slave unit (2b). The central monitor board (30) transmits a start signal to the indoor unit (20) as a master unit (2a) in accordance with type data of the type area (M2). In addition, the central monitor board (30) determines that the indoor units (20, 20, . . . ) having begun to operate in response to the start signal belong to one group (GR) and enters the determination result in a group area (M3) of the memory.