| 摘要 |
<p>PROBLEM TO BE SOLVED: To make it possible to efficiently detect and inform the water run-out in a water tank at suitable time. SOLUTION: The method for detecting the no water of a water tank comprises the steps of counting the respective operating times of a feed water pump, accumulating the counted pump using time (S20), comparing the accumulated time with a predetermined pump using limit time (S27), and judging the result of the comparison as the water being run out in the tank when the accumulated time exceeds the limit time (S28).</p> |
