| 摘要 |
PROBLEM TO BE SOLVED: To perform reliable detection of normal water presence by a method wherein when a circuit trouble occurs to an energization control circuit, the second threshold of the heat generation state of a heat-sensitive element is further set and a heat generating state detected during self-heat generation of a heat-sensitive element is compared with the second threshold, and the circuit trouble of the energization control circuit is decided. SOLUTION: A hot water supply apparatus 1 is connected to a hot water supply pipe 6, and by opening a faucet, water flows through an apparatus. When flow-through of water is detected by a water quantity sensor 8, a controller 10 causes respective opening of a main solenoid valve 11 and a solenoid valve 13, a proportional control valve 12 is opened at a given opening, and an ignition electrode 16 is continuously sparked to ignite a burner 4. The controller 10 computes a necessary heating amount from an initial water quantity obtained from an initial water temperature obtained by an incoming water temperature sensor 7, so that hot water is supplied at a set temperature set by a regulation button of a remote control 14. Further, the controller performs correction control of the opening of the proportional control valve 12, based on a detecting temperature obtained from a hot water supply temperature sensor 9, so that a hot water supply temperature coincides with a set temperature.
|
