Two speed Electric motor question

[beowulf]

Posting a pic of the diagram on the motor - appears to be a diagram for a low speed and a high speed setting. The high and low speed settings have always been controlled by the timer panel. BTW - I found on-line the manual for the timer/control (Intermatic P1352ME) which contains wiring instructions at that timer panel. It appears that this timer (expensive) was placed into the same panel box which contained an old manual timer panel - I discovered this because there was an old diagram in the door of that box for an old manual set up. When they installed the two speed motor they put in the new electronic timer in the same box and wired it up along with the motor. The wiring in the timer box has not been changed so the wiring issue is at the motor - or some other issue with the motor.

Anyway, here is the pic taken from the side of the motor - but two separate diagrams for wiring for low and high speeds. What I had was for both speeds controlled by the timer.

 

[beowulf]

Reading your OP carefully, makes me understand that the motor DOES work, slow and fast if you interchange connections. The start circuits or capacitors must be in the motor. The Intermatic just switches the power, via contacts or using solid state. So, I suspect that it could be the control and not the motor.

When I reinstalled the pump after the bearings and seals were replaced, I could activate the high speed with the high speed button at the timer box. But if I hit the low speed button I only had a humming sound. So I switched the hot lines (red and black) between the high and low speed connections at the timer. After I did that, when I hit the high speed button I had a humming sound, but when I hit the low speed button the motor ran, but at high speed. Do not know what that means as I am a bit out of my element - just trying a few things that might help diagnose the issue, or leave me with fewer choices.

 

[Industrial Toys]

What is the model of the intermatic timer?

When you operate those pushbutton switches, does the corresponding output just latch on and off? I don't think BOTH should be on at the sme time. One or the other.

 

[RoyKing]

I thought maybe the panel had motor start circuits but it doesn't, does the motor have external caps? If it doesn't you've lost low speed, and if it worked before the bearings repair, so I'd say the rebuilder screwed it up. I'd return to them

 

[beowulf]

What is the model of the intermatic timer?

When you operate those pushbutton switches, does the corresponding output just latch on and off? I don't think BOTH should be on at the sme time. One or the other.

Intermatic P1352ME

If you push high it runs on high, if you push low, it goes to low and visa versa. I did try once to diagnose things, and while it was running on high I kept pushing high while hitting low and then releasing the high button and it did then run on low. Whatever that means.

 

[beowulf]

I thought maybe the panel had motor start circuits but it doesn't, does the motor have external caps?/QUOTE]

RoyKing, I don't know what it means for a motor to have external caps? Nothing protrudes except for the domed cylinder on top - assumed that was capacitor.

 

[RoyKing]

So you did get it to run on low? Then get a cheap VOM meter and check the voltage for high and low. Put one lead on terminal one and then probe 2 and 3 only one of them at a time should show 220 volts. If not the timer is shot.

Another way if its is running on high turn off breaker and move wire on 2 to 3 leave the other disconnected, if runs on low its the timer

 

[Industrial Toys]

Timer must be in MODE 2 so high and low terminals are never both on at the same time. Like I said, I would first try and power it without using the timer contacts.

Hump on motor is starting capacitor. But motor starts fine.

 

[beowulf]

Another way if its is running on high turn off breaker and move wire on 2 to 3 leave the other disconnected, if runs on low its the timer

Okay, I did the above (2 to 3 and leave 3 disconnected) and when I did so, the low button ran the motor on high. Then after I reconnected the wires back to original position, high button worked to activate high speed, and low button still had that moderate humming sound. BUT then I kept pushing the low button and got it to start on low. Turned it off, pushed again and only a hum, but with persistent pushing I got it to run on low though it seemed to do so only now and then - i.e., sometimes would hum, then I could get low to run. Once low is running it keeps running and I can switch to high and back to low with sometimes hum sometimes low speed. I don't know what this all means. I would consider a faulty low switch but something is getting to the motor to make it hum. Breakers are 2 20 amp tandem breakers - I assume both are fine as when I switch the black and red on the timer I get the motor to run on high with either lead.

And I called the pool place that put in new seals and bearing - they test the motors on high and low before they go out and they said it ran fine. They said I could unhook it and bring it back and they would test it again. That seems like a good course as then I will know if it is an issue with the motor or with the timer or whatever. And if it is a motor issue, they can likely tell me what it is and perhaps fix it there. And they also told me where the wires should be connected at the motor - top - common, middle = high speed, and lower = low speed. That is how the motor is now connected.

Anyway, I will let it run on low for a while and then recheck the speed buttons. If I still have issues I will take it back to town - likely later this week.

Again, I cannot thank you guys enough for taking your time to try to help out an old guy living in the hills. So very much appreciated.

 

[RoyKing]

It is the timer, get new one , take pics of the wiring