| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a hot water system capable of switching the power supply of a central control section from a main power supply to a sub power supply without resetting a control microcomputer. <P>SOLUTION: The hot water system in which a plurality of hot water supplying units are controlled by the central control section 1 is equipped with a connecting part 12 of the main power supply and a connecting part of new the sub power supply, a main power supply voltage monitoring unit 14 for monitoring that the voltage of the main power supply 2 is lowered to a predetermined voltage or lower, and a power supply switching unit 15 for switching the power supply supplied to the control microcomputer 11 from the main power supply side to the sub power supply side when the lowering of the voltage is detected by the main power supply voltage monitoring unit 14 in the central control section 1. The predetermined voltage detected in the main power supply voltage monitoring unit 14 is set within a voltage range where the control microcomputer 11 is not reset by the lowering of the voltage of the main power supply 2. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
