FIXED - Need Expert Service Help ASAP - Home Well Pump Won't Shut Off (1 Viewer)

[Dissent]

I'm looking for help in locating someone who is very familiar with home well/water storage systems and electrical controllers. I have a well that feeds a tank that feeds the house and the tank keeps overflowing. I have to cut the breaker and turn it back on when the tank runs low. Plumbers say it's electrical, electricians say it's plumbing. I need a well expert.

The well pump is powered through a Centripro model CB30412MC, 3 HP, 230V magnetic contactor control box.

There is a Grundfos CU301 controller that maintains the storage tank level fed by the well pump. The LEDs on the display haven't worked in the 3x months I've been here but up until a few days ago, it was functioning just fine.

I suspect a stuck relay or bad water level sensor somewhere but need help ASAP.

Thanks in advance!

 

[Skrugg]

Not an expert but it sounds electrical to me... How does it know when to shut off? A float switch?

 

[Skrugg]

Amazon has a diagram for how the control is wired. Amazon product ASIN B0145N8G7G

 

[toy_tek]

If you disconnect the SW input and it stops running it’s a faulty switch or shorted switch circuit . If it keeps running then you have a problem w the Relay or controller.

 

[toy_tek]

Ps I’d suggest a different electrician.

 

[Living in the Past]

Amazon has a diagram for how the control is wired. Amazon product ASIN B0145N8G7G

If the well pump is continuing to run and overflowing the tank it would be the other controller. This one maintains tank pressure.

Ps I’d suggest a different electrician.

Be sure to find one who works on controls. Been my experience didn't matter what trade many techs would say it was was another trade's problem if they didn't know what the problem was.

Unless your water table is pressurized no way water would come to the surface without power to the pump. Never worked on well pumps but have experience with sump pumps. Those were not dealing with potable water. Was either sewage or storm water. Those had mercury floats. Those had four different floats. Two to turn on the pumps, one for alarm and one to shut the pumps/alarm off. Not sure if they is a low level alarm but think it might have a separate pump on and pump off circuits to prevent short cycling of the pump. Being potable water not sure mercury floats would be legal. What ever the controller uses to cycle the pump on and off would say it's part of the controls and would be an electrician problem not a plumber's.

 

[toy_tek]

If the well pump is continuing to run and overflowing the tank it would be the other controller. This one maintains tank pressure.




Be sure to find one who works on controls. Been my experience didn't matter what trade many techs would say it was was another trade's problem if they didn't know what the problem was.

Unless your water table is pressurized no way water would come to the surface without power to the pump. Never worked on well pumps but have experience with sump pumps. Those were not dealing with potable water. Was either sewage or storm water. Those had mercury floats. Those had four different floats. Two to turn on the pumps, one for alarm and one to shut the pumps/alarm off. Not sure if they is a low level alarm but think it might have a separate pump on and pump off circuits to prevent short cycling of the pump. Being potable water not sure mercury floats would be legal. What ever the controller uses to cycle the pump on and off would say it's part of the controls and would be an electrician problem not a plumber's.

Hard to say exactly with limited info given here, but a cursory look at the gunflo controller I believe that one maintains pressure to the house from the tank. The diagram posted earlier is for a 3hp pump controller, more likely to be the well pump not a house pressure pump. And the SW input shows “pressure or other switch” which I can make an assumption would actually be the level switch in the tank.
Either way someone with some troubleshooting skills and a meter should be able to figure it out without too much hassle. Best of luck

 

[el_diabolico]

Not an expert but it sounds electrical to me... How does it know when to shut off? A float switch?

This is where to start. How are you controlling this? Can you send pics of the setup? (I worked in a water utility for over 25 years)

 

[Dimples]

 

[Dissent]

Thanks for the feedback! I figured it out! The controller, pressure switch and demand pump are one system. The well pumo, capacitor box and tank float are the 2nd system. A stuck float is keeping the relay latched which keeps the pump flowing. I pulled the float circuit apart and the relay released.

Now I'm waiting for the plumber to arrive to verify and replace the float!