DOS: Negative readings in logs / incorrect dosing amount

[ScottJazz]

My DOS QD has been acting weird since sunday. I've setup one head to dos kalk at night. I first set this up 3 weeks ago. It's been working great up until this point. I saw over the weekend that it was no longer consistently dosing at fixed intervals like it had been. The dosing amounts were inconsistent but still within the schedule time. The weirdest part is that there was a negative reading in the log, a quite large one. Even when I adjust the dosing intervals, it still does only a fraction of them. Anyone run into this before?

 

[n2585722]

I don't know on the Apex but on the Hydros smart dosing pumps a positive dose is pump running in normal direction. A negative dose is pump running in reverse. That could be the case with Apex also but hopefully someone that knows will post here so you will know for sure.