A service system which includes the monitoring center which has a customer
database, an operation information database for storing operation
information of the air conditioners for each customer, and a device
information database 203 having device information on the air conditioners
related with each customer of the customer database. When the system
decides that there is anomaly in the operation information, the monitoring
center sends to the cellular phone over the Internet information
representing the content of the anomaly and customer and device
information associated with the operation information which was judged
abnormal.
