| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique enabling presence or absence of failure in a low temperature-side water amount sensor to be automatically determined, for a hot water supply device comprising a high temperature-side water amount sensor and the low temperature-side water amount sensor.SOLUTION: The hot water supply device according to disclosure of the present invention comprises: a mixing valve which mixes high-temperature water and low-temperature water together; a high temperature-side water amount sensor detecting a flow rate of high-temperature water flowing in the mixing valve; a low temperature-side water amount sensor detecting a flow rate of low-temperature water flowing in the mixing valve; and a control device. The control device is capable of performing fault determination processing of determining that the low temperature-side water amount sensor gets out of order. The control device determines that the low temperature-side water amount sensor gets out of order when the mixing valve has an opening at which the flow rate of the low-temperature water is larger than a flow rate of the high-temperature water and the high temperature-side water amount sensor detects the high-temperature water flowing, and the low temperature-side water amount sensor does not detect flow of the low-temperature water.SELECTED DRAWING: Figure 2 |
