| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control device especially suitable for control of multi-functional types, capable of securely executing a combustion stopping process when a microcomputer has abnormality. <P>SOLUTION: This control device comprises a main microcomputer 51 to control opening and closing of gas solenoid valves in respective combustion parts for supply of hot water and bathwater through solenoid valve drive circuits 2a and 2b, and a subsidiary microcomputer 52 to disconnect supply of power to the solenoid valve drive circuits 2a and 2b through a power disconnecting circuit 3 for fuel for closing both gas solenoid valves for supply of hot water and bathwater. The combustion stopping process in normal operation is alternately conducted by the main microcomputer 51 and the subsidiary microcomputer 52. For stopping either combustion under a state that additional heating for supply of hot water or bathwater is simultaneously conducted, the combustion stopping process is executed through the solenoid valve drive circuit 2 by the microcomputer 51 regardless of rules. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
