RO Overflow!

[Waxman]

Came in to a flooded pump room; yay!

The RO system is generating even though the tank is full. My first thought is a bad float. Before I dismantle stuff to get at the float (I stack another tote on top of RO tank for reject recovery and it's currently quite full, too!), is this where to start fixing the problem?

When I power the system down the pump turns off then a few seconds after re-powering it comes back on.

No trouble shooting in the manual and company's of course not open presently.

Thanks for any advice!

 

[Dan kamsickas]

Not knowing what brand of RO you have, I can only suggest the basics.

1) Check upper float to see if it is shorted.

2) Float, most likely, initiates a control that opens inlet solenoid and pump. Something could be amiss with control.

3) Contacts on motor starter for pump shorted.

 

[dreese]

The control float in the tank has to be wired into the system control box - follow the cord coming from the upper switch in the storage tank to its termination point and see if there is continuity thru the switch. If there is, the control switch is bad.

 

[MEP001]

More than likely the float switch itself is bad. If it were motor contacts, it would come back on immediately after being powered back up and it would likely be running the pump dry. Disconnect the switch at the controller first - if it stays on it's not the float switch.

 

[Waxman]

disconnected float switch and it kept running. then i discovered the nut that holds the solenoid on was very loose! tightened it down. powered up. pump came on for a minute then shut right off.

water was getting back into ro tank even with system powered down, so i think maybe it getting by that solenoid because it was very loose?

 

[termn8tr]

Had that exact same problem about a year ago, it was a bad solenoid.

 

[MEP001]

It must be a system where the pump is kicked on by the water pressure, otherwise I wouldn't have thought to check the solenoid.