HOT WATER SUPPLY MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a safe hot water supply machine not causing a user's scald by detecting failure even if a hot water supply temperature detection sensor fails.

SOLUTION: This hot water supply machine has: a heat source heating stored water inside a hot water storage tank 10 or tap water to a set temperature; a hot water supply flow rate sensor 16 detecting a hot water supply amount from the hot water storage tank 10 or the heat source; the hot water supply temperature detection thermistor 15 for detecting a hot water supply temperature; and a controller controlling a heating amount of the heat source according to the hot water supply temperature detected by the thermistor 15. When the thermistor 15 successively detects a temperature not more than a prescribed temperature (55°C) for a prescribed time (10 sec) after detecting a hot water supply amount not less than a prescribed amount (2 liters per minute) by the hot water supply flow rate sensor 16, a microcomputer 25 decides that the thermistor 15 is abnormal.

COPYRIGHT: (C)2004,JPO