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Old 07-15-2010, 08:25 AM   #1
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Well pump issue...


Hi all,

Basic issue: I have no water!

Background:
280ft drilled well
3/4 hp, 230v pump (3 wires plus ground)
5 gallon tank in house with pressure switch

Well has a slow refill rate and has "run out" of water about 3 or 4 times in the past 2 years. usually just a few hours wait time and back in business. not this time.

I currently have zero water pressure and the pump doesn't seam to be cutting in. the pressure switch on the tank has a manual lever and when I engage it I get sparks and the light even dims a little but no water pressure.

I've tested the resistance on the wires coming from the pump based on the discussion here: http://www.diychatroom.com/f18/pump-...-21457/index2/ and it seams to be within the acceptable range.

I thought I was getting a funny reading on the resistor in the control box so I replaced the box and still nothing.

so I'm wondering what else to check? could it be a blockage in the line and if so can I force water down through the line? or is there something electrical I'm missing here?

Thanks for any advice!
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Old 07-15-2010, 09:50 AM   #2
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Hi and welcome to the forum.

I'd check the check valve first off. If it's faulty, it would do as you describe.
Of course, I could be wrong, as I usually am....LOL
Others here may have other opinions as to what to try.

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Old 07-15-2010, 10:21 AM   #3
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Measure the current draw. Current is what moves things.
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Old 07-15-2010, 10:33 AM   #4
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You have two problems at least.
1. Why is the pressure switch not turning on the pump?
2. When you manually turn on the switch, why no water?

Let's discuss #2
Can you open the well cap? If so then energize the pump and go the well. Listen to see if you can hear water. If the line down the well is damaged the water could be spraying back into the well.
Drop a line down the well with float on it. See how high the water is. Drop another line down with a weight on it. See how deep the water is. Do you know how deep the pump is in the well? . From the first test, is the pump under water?
Check the current draw on the pump when energized. If 0 then pump is not running (doubt this since you see sparks).
Check pump specs to see what current draw you should get. If normal then could be bad water line.
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Old 07-15-2010, 06:09 PM   #5
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Some pressure switches have a low-pressure cut-off as a safety feature. This prevents the pump from running "dry" and burning up..... the manual lever is there to "prime" the pump to get the pressure up to an acceptable range.

That being said, it would appear that something is wrong with either your pump or the control box. Or the well has gone dry for good
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Old 07-15-2010, 08:09 PM   #6
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Pulling the pump tomorrow. What or how should I be testing when I get it out?

And thanks for everything!
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Old 07-16-2010, 01:15 AM   #7
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Also some wells do have some type of screen on bottom of the well somecase it can be clogged as well this part it will be wiser to get the well driller they have specal tool to remove the screen and replace it.

I have to replace it couple time allready especally if they are at 150 meter {not feet } down !!

Merci.
Marc
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Old 07-16-2010, 09:19 AM   #8
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How do I test current at the pressure switch when the switch won't stay on?
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Old 07-16-2010, 11:56 AM   #9
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Quote:
Originally Posted by santos_l_halper View Post
How do I test current at the pressure switch when the switch won't stay on?
Bridge the switch contacts with an ammeter just long enough to get a reading, if you can do this without violating the rules governing pump operation and good practice.

But use a clamp-on ammeter and a jumper wire. The internal fuses for DVMs are costly.

Last edited by Yoyizit; 07-16-2010 at 12:03 PM.
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Old 07-17-2010, 12:22 AM   #10
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As Yoyizit mention DVM amp reading they are only good for 10 amp the max and the fuse are not cheap so don't bother use that so use the real deal clamp on amp meter that will read much higher current level without destory it.

When the pump start at first time expect current surge go up much as 6X of running amps.

And you can able find them in big box store some will stock it and some may not stock it and they can order it.

Merci.
Marc
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