Testing a Dos

[Gtinnel]

I bought a dos from a user on here and I was curious if there is a way to test the motors without an apex? I know that to use it I have to hook it up to an apex, which I’ve already ordered, but until the apex arrives I was wanting to test the motors. I plugged it into the wall and pressed the buttons to prime the lines but nothing happens. I'm mostly concerned because when I got it a small screw fell out of the mounting hole.

 

[Gtinnel]

Nevermind, apparently I just didn't give it long enough to initialize. I can run the pumps now with the prime buttons.