Patent ID: 7110758

Claim:
A method of performing maintenance of an inverter of a user using a portable telephone including a first interface for communication between said portable telephone and said inverter and a second interface for communication between said portable telephone and a user support server of a maker, comprising the steps of: receiving abnormal information of said inverter from said inverter using said first interface of said portable telephone, when an abnormal condition has occurred in said inverter; transmitting said abnormal information from said portable telephone to said user support server using said second interface; at said user support server, analyzing said abnormal information so as to create trouble shooting information regarding said abnormal condition, and then transmitting said trouble shooting information to said portable telephone; and operating said inverter from said portable telephone, by using said first interface, based on said trouble shooting information so as to solve said abnormal condition of said inverter, without said portable telephone being in communication with the user support server through the second interface.