Hi all,

So I am new to my P4 and doing a dual sensor ATO Min-Max Control that I set up following the GHL video. The situation is this:

1. I have set my min and max mechanical sensors in my return section.
2. When the water triggers the min-sensor the ATO opens and the solenoid and begins filling.
3. After a "Maximum on-time" of 20min as set in the Control Circuit, the P4 closes the solenoid and the water stops. This is BEFORE the max-sensor is triggered - it would take roughly an hour of filling to trigger the max sensor.
4. I have set the P4 to generate an error and then reset the error automatically.
5. When the water level reached the min-sensor a second time, it did not trigger the solenoid to open and fill. I had to manually go in and reset it.

Any idea why it didn't trigger the second time?

OR do I have to exactly measure the time it takes to fill all the way to the max-sensor (roughly an hour as mentioned) so it doesn't generate the error in order to work continuously?

Thanks for any insight!
J