To provide a water level control device for a plumbing tank capable of preventing accidents due to abnormality in a circuit inside a water level detecting device in advance.
The water level control device is equipped with the water level detecting device 34 for outputting a water level detection signal when the water level in a reservoir 14 for storing water inside is higher than a predetermined water level, and a control part 22 for controlling the water level of the reservoir 14 based on the water detection signal for the plurality of water levels from the water level detecting device 34. The control part 22 outputs a detecting device abnormality alarm to the outside if combinations concerning the presence or absence of the water level detecting signals for the plurality of the water levels from the water detecting device 34 are not compatible. For example, if a water level detecting signal for drought water level L1 is not output from an electrode rod 341 even though a water level detecting signal for a predetermined returned water level L3 with which a pump 16 can be started is output from an electrode rod 343, a detecting device abnormality alarm is output to the outside.
KOMATSU TAKAHIDE
NAKAJIMA KAORU
TEJIMA TOMOJI
EBARA DENSAN LTD
| JPH0642466A | 1994-02-15 | |||
| JPH01152219U | 1989-10-20 | |||
| JPH0862022A | 1996-03-08 | |||
| JPH09144685A | 1997-06-03 |
Shintaro Hotta
Ryoji Kosugi
Tomohiro Mori
Tetsuya Hirosawa