Pressure drops inexplicably

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When you say touch leads to red and blue, what do you mean? Red lead to either red or blue and the black lead to something (if so, what)? Or touch the red to one and black to the other?

Sorry for the newbie questions...this is all new to me :(
 
Did some YouTubing. Looks like the black goes to a ground and red to the test wire. Tested both red and blue and both test at 119v individually. Do you add them up to get 240v?
 
Ok. Black lead to red wire, red lead to blue, 237.

Switch hooked up and pump running. Black lead to one load on switch, red to the other, 237.

Dropped RPM to 1000. Still 237 at the black line outputs on switch.

Used the clamp on amps. 0.9 at 1000 rpm, 7.6 at 3450.
 
Ok, those numbers look good. Although it's unusual that the voltage didn't drop any while the pump was on. At full speed, you should see the voltage drop a few volts. Make sure that you didn't press a "Hold" button, which holds the display.

If you're using the new switch now, there might have been a problem with the old switch.

There might be some sort of intermittent power supply problem.

Keep an eye on the pump. Hopefully, it won't happen again.

What are the amps listed on the motor label?
 
I put everything together. Left it on 3450rpm to keep heater going. As I was finishing putting the cover plate on the electrical box it suddenly stopped, flashed an error 001A. Then started to self-prime almost immediately, error 000F. Then self-primed again and now it’s going. >.<

Opened the top of the pump motor to make sure everything still connected. Sure seems to be. Measured 237 at the leads for volts again.

35AB3CF2-DDD3-44C7-BD4C-D4151C446DC5.jpeg
 
JamesW said:
Ok, those numbers look good. Although it's unusual that the voltage didn't drop any while the pump was on. At full speed, you should see the voltage drop a few volts. Make sure that you didn't press a "Hold" button, which holds the display.

If you're using the new switch now, there might have been a problem with the old switch.

There might be some sort of intermittent power supply problem.

Keep an eye on the pump. Hopefully, it won't happen again.

What are the amps listed on the motor label?
Click to expand...
See photo
B12C226C-FEE2-4385-BFEC-E10D5B05F8CF.jpeg
 
It's odd that the voltage stays exactly at 237. It should drop some when the pump is on. The amps at 7.6 for a full load might be a little bit low.

Based on the previous pump issue and the current pump issue, it might be time to contact an electrician to have them check it out.
 
0F means Absolute AC under voltage detected.

So, maybe the voltage is dropping?

Try checking the voltage with the pump off and then watch the voltage as you turn the pump on at 3450 rpm.

I suspect that the breaker is going bad or the wires are damaged somewhere.

The wires are taped at the pump side. Were they in good condition?
 

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JamesW said:
0F means Absolute AC under voltage detected.

So, maybe the voltage is dropping?

Try checking the voltage with the pump off and then watch the voltage as you turn the pump on at 3450 rpm.

I suspect that the breaker is going bad or the wires are damaged somewhere.

The wires are taped at the pump side. Were they in good condition?
Click to expand...
The insulation was coming off one of them, showing some bare wire, so we taped it. Maybe those wires have a break in them we didn’t see. My wife swears the wires were intact, from what was taped.

Did a video on what you requested so you can tell me if I’m testing right or not.....

Here’s the pump running, run down to low RPM, retested

https://www.facebook.com/100000182950095/posts/3520558704626860

Here it is off and spinning up.

https://www.facebook.com/100000182950095/posts/3520558701293527
 
It's difficult to read the meter display in the video.

With the pump off, the voltage should be steady between about 230 and 245.

When the pump is running full speed, the voltage should be a few volts lower but steady.

There might be a damaged wire or maybe the breaker is going bad.
 
JamesW said:
Make sure that the meter is in auto ranging mode.

Is the voltage steady when the pump is on and off?
Click to expand...

It seems to be. I don’t see it dropping at all. Always seems to be 237v no matter what.
markayash said:
James, what issue are you concerned about? The voltage dropping too much when it runs?
Just curious

Does panel A go direct to the small breaker box ?
Click to expand...
Main panel goes to sub panel A and B. B doesn’t come from A.
 
It also went out again and this time displayed error 0021. It’s like it can’t make up its mind on the error.

Now when it’s going out, it starts right back up again. But that can’t be good for the pump or heater to do that several times an hour.
 
21 Communication link between HMI and motor control has been lost.

Maybe the cable from the controller to the motor was pulled loose during the testing.

Probably time to get an electrician.

There seems to be some sort of unusual electrical problem.
 
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IceShadow said:
It also went out again and this time displayed error 0021. It’s like it can’t make up its mind on the error.

Now when it’s going out, it starts right back up again. But that can’t be good for the pump or heater to do that several times an hour.
Click to expand...
I am wondering if you have a bad pump?
Doesn’t sound like your voltage is dropping but I don’t know. Just strange how other pump acted weird.

could be like James said and a bad breaker, maybe it gets hot.

You could replace the 240 breaker in panel B, just make sure the feed from main panel is off. They are fairly simple. Might also kill main panel and once power is off to B check all the screws that hold the wire and make sure they are tight.
If you want to try take a picture and take the old one to HD and they should have it.
I have also bought them on amazon.
 

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