| 摘要 |
PROBLEM TO BE SOLVED: To suppress a hot water shortage state from being entered and an electric power consumption from increasing in a case of a defect in communication between a general control part and a heat pump water heater.SOLUTION: There is schedule data 49 such that groups that heat pump water heaters 60a, 60b, 60c, 60d, and 60e belong to differ in executable time of boiling operation. In a case of a defect in communication between a general control part and a water heater-side control part, the water heater-side control part performs control based upon the schedule data, and the general control part excludes the heat pump water heater 60e from a predetermined number of water heaters in the executable time zone of the heat pump water heater 60e, and determines heat pump water heaters, selected as many as the exclusion result number out of the heat pump water heaters 60a, 60b, 60c, and 60d that are capable of communication, as objects to operate. |
