| 摘要 |
PROBLEM TO BE SOLVED: To enable abnormality of a thermistor to be reliably decided on by a method wherein a circulation pump is set so as not to be operated upon detecting the abnormality of a hot-water temperature detector by the pouring of hot-water. SOLUTION: When pouring of hot-water from a hot-water supplier 1 into a bath boiler 3 or a bathtub 4 is started by a pouring circuit 2 and the amount of hot-water has arrived at a given amount, the detecting temperatures of an input water thermistor 15, an output hot-water thermistor 17 and a bath thermistor 36 are compared to decide whether respective thermistors 15, 17, 36 are normal or not. When all of temperature differences among respective thermistors 15, 17, 36 are within a given value, it is decided that all of the thermistors are normal but if not, it is decided that some of them is abnormal. When it is decided that some of them is abnormal, the circulation pump 35 is not operated and the hotwater pouring solenoid valve 22 is closed to stop the pouring of hot-water. According to this method, the decision of abnormality of respective thermistors 15, 17, 36 can be effected correctly. |
