Deep well pump mystery! Help, please


Old 09-11-05, 04:39 PM
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Deep well pump mystery! Help, please

I have a 220v deep well pump, holding tank with 30 psi air pressure on bladder and pressure switch set 34psi on, 54psi off. Starting from 0 psi water pressure I close in pump circuit breaker, switch shows 236v and pump runs pressure to about 37 psi and quits running. Switch shows 244v. I open breaker and read 80K ohms on the 2 wires to the pump. The switch is still closed in. (If I open the breaker with the pump running ,before it quits, I show 2 ohms.) It sounds like pump thermal overloads, but it will run again after only 1 minute or so and will continue that sequence indefinitely. I would think thermals would keep taking longer to reset or open up permanently.
Any thoughts or suggestions are greatly appreciated.
Thanks, John
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Old 09-11-05, 06:17 PM
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Sounds like thermal overload to me as well.
Old 09-12-05, 09:57 AM
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When you get these readings, are you isolating the pump wires from the rest of the system itmup?

To properly check the motor and it's cables, they must be isolated. Then read both wires on your X1 scale and see what you get. Then shift up to X1K and read to ground from each individual wire. Tell me what you get.

The voltage is good so it is not an issue. I am also assuming this is a two wire pump. If not and the pump has a control box, let me know. It's all together different than the two wire.


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