Spring tech 600 running backwards

[jmayerl]

So I have buyers remorse on a used springtech 600. I bought it to upgrade from my 250 and since I bought it from the other side of the state I only had the sellers contact info on messenger.

Well when I got it home it looked like 2 of the gauges are not working but I figured I can source those from somewhere. I went to plug it in today and wash and rinse it and when I turn it on the feed pump runs and the high pressure kicks in but the flow seems to be backwards. I was so surprised it took a few moments to recognize why it wouldn’t build pressure.

I didn’t think this was possible with a 240 circuit. I had an electrician over last year and he upgraded my panel and put this 50 amp outlet in specifically for the RO.

Any thoughts?

[82cabby]

Three phase motors will run the other way if two of the three hot lines are reversed. Any chance this is a three phase circuit or a three phase motor running on a single phase current?