Ok, so, your When statement is what puts it into alarm state. That says if it runs for more than 2 minutes, freak out and shut down. I don't know what your evap rate is, or how big your tank is, but maybe you just need more time. I think mine is set to something crazy like 20-30 minutes, but I have a big tank and the water levels move around a ton.
I'm guessing you need more than 2 minutes to refill, so maybe start moving that When up higher until it doesn't alarm, and you feel like it's working. Don't just set it to something crazy, because that is what saves you from it just overflowing the tank if the sensors die. You need to kinda understand the water needs of your tank, and how long it should run on average. If you can deal with the alarms a bit longer, maybe start moving it up 1 minute at a time, and be concerned if it gets above 10-15?