| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water heater having high usability which can eliminate an analysis time or can avoid the unnecessary exchange of failure equipment caused by the exchange or repair of only the failure equipment by the determination of the failure equipment of a communication abnormality. <P>SOLUTION: The water heater which includes a communication means 4 with each equipment and a control means 5 transmits an object signal every predetermined time to each equipment recognized by initial communication using the control means 5 and the communication means 4. The equipment, which does not receive a reply of the object signal from the equipment within the predetermined time is determined as failure equipment and the failure equipment is notified to a user. The water heater having high usability which can eliminate the analysis time or can avoid the unnecessary exchange of the failure equipment can be provided because only the failure equipment can be exchanged or repaired by the determination of the failure equipment of the communication abnormality. <P>COPYRIGHT: (C)2012,JPO&INPIT |
