LIQUID LEVEL CONTROL SYSTEM

摘要

PROBLEM TO BE SOLVED: To solve the failure of water level control due to the deterioration in an analog output type water level sensor. SOLUTION: This water level control system is provided with a water level sensor 16 configured of first water level sensors 16B and 16C for detecting specific high water level and low water level and a second water level sensor 16A for continuously detecting a water level; and a control unit 17 for judging that the second water level sensor 16A is abnormal when a difference between the water level detection results of the second water level sensor 16A when the high water level and the low water level are detected by the first water level sensors 16B and 16C is equal to or less than a set value, and for stopping the water level control by the second water level sensor 16A. COPYRIGHT: (C)2009,JPO&INPIT