I'm testing my failsafe and the WL doesn't distinguish the "B" light on the gauge when I move it clockwise from a fully counterclockwise position.

I started the test by setting the WL fully counterclockwise and the WH fully clockwise with the SC set at 6 bars. When I press the test button and then adjust the WL clockwise the "B" light never goes out. If I leave the WL fully counterclockwise and move the WH counterclockwise it does distinguish the "B" light. I remember reading about a similar problem on this forum but I'm unable to locate the thread or post. Can somebody point me in the right direction and tell me how to resolve this problem? I have the map switching setup on this Aquamist system and it's running off IDC.

 

I think I've located the answer from another forum:

The failsafe WL and WH scan's the entire 0V -5V range of the water flow sensor.

The natural output of the flow sensor is ~0.53V to 4.5V. If the WL is set to minimum, the failsafe may be confused by the minimum 0.53V of the sensor so the "B" light comes on.

After you have calibrated the "SC" for displaying 5-6 bars:
1) Advance the WL a few clocks clockwise, the "B" light will go off.
2) The adjust range of the WL is 0V-2.5V and the WH is 2.5V to 5V.

Between the potentiometer, it covers the entire failsafe range.

 

Ok I went out and got the failsafes working correctly, however, I believe my system might have something wrong with it. I set the gauge to read 6 bars when activated then turned the WL 1 click at a time. I finally turned the WL as far as it would go clockwise and the B never went off. Leaving the WL at full clockwise I then started turning the SC counter clockwise. The B finally went off when the gauge displayed 4 bars, I bumped it up 1 bar and the B lit up again so I left it that way.

Richard, is there a problem with the sensor?

 

The suggest testing the failsafe system without the the flow sensor. Here is how this can be achieved:


Please tell me the serial number of the flow sensor so I can check the batch.