I am running the ATK Version 2 in stand alone mode. It has been running ok for the last few weeks, since I started cycling the tank. ( I did have two times where the red light came on and I reset it by turning off power. But this solved the problem). But yesterday I did some maintenance and unplugged it. When I plugged it back in, it does not stop topping up the tank. It goes past the first and second optic sensors and closes the float valve. But doesn’t stop. Any help please

