Electric Motor Question....

[SolomonMan]

All,
Yesterday in the morning the fan was fine. Its approximately 10 years old. Its one of those high Velocity types.

In the afternoon I noticed it was not running any longer.

During the investigation, I confirmed the wiring, confirmed the 3 way switch is fine, the Capacitor measures the correct Microfarads. So I went to the Motor;

No smell of burnt and it spins very easily. I started to measured the continuity between the 6 wires.

I have included a diagram from a YouTube video I found but basically the wiring is identical. The only exception is the colors of the wires between the motor and switch are slightly different.

Anyway am I correct in the assumption that I should not measure continuity between any of the wires (Gray, Red, or Yellow) going to and from the switch\motor?

Thanks,
Chris

[stj]

Re: Electric Motor Question....

maybe the switch is not passing high current - try bypassing it

[CapLeaker]

Re: Electric Motor Question....

Or one of the capacitor wires is open.

[SolomonMan]

Re: Electric Motor Question....

maybe the switch is not passing high current - try bypassing it

STJ,
Tried Bypassing it had no change.

Thanks,
Chris

[SolomonMan]

Re: Electric Motor Question....

Or one of the capacitor wires is open.

CapLeaker,
Confirmed the wiring and even tried spinning the motor by hand to give it a head start. I assume the Capacitor is a starting Capacitor for the motor?

The Capacitor is 250V 12 MicroFarad Capacitor (Box Capacitor).

Thanks,
Chris

[SolomonMan]

Re: Electric Motor Question....

Everyone,
The way this Fan quit was quite odd.

Running Fine in the morning and nothing by afternoon...So I started asking the kids if they knew anything.

My oldest daughter said she was sweeping the hallway and pulled the plug from the surge protector to plug in the sweeper. The surge protector hosts the TV, Blu Ray, Phone charger and bedroom lamps. We commonly unplug the fan or lamp for the weekly bedroom sweeps.

She said she plugged in the fan after she swept and heard the fan spin up.

So not sure if the unplugging and restarting the fan was it or the motor maybe demised shortly after trying to restart?

I did measure the Capacitor out of circuit and it measured 12 Microfarad on my DMM.

Thanks,
Chris

[sam_sam_sam]

Re: Electric Motor Question....

What is the resistance on the gray and red wire with out the capacitor hookup

[SolomonMan]

Re: Electric Motor Question....

All,
I went a little deeper into the motor;

sam_sam_sam, as asked the resistance of the Capacitor wires (without the capacitor involved) is 74.4 ohms.


Next I made a Table of wires Resistance between the remaining 4 wires.

Remember the wire colors I mentioned previously in the image I pulled from YouTube do not represent my motor but the wiring setup is identical. I updated that previous image to represent the actual colors now and included it with the latest posting.

I included the resistance Measurements.

As you can see from the table the Red Wire is open. Also that is my common wire.

So I started to look at the labeling on the motor. The motor has a label that says it was thermally protected.

Looking at the motor closely I could see a white component (image included).

I believe that image is the thermal protector.

I confirmed this is what is causing the Red to be Open by taking a screwdriver and crossing the two wires going to it. Then measuring my resistance values once again.

Red -> Blue measures 33.3
Red -> Grey measures 45.6
Red -> White measures 53.6


So my question I guess now is it possible to get another thermal protector or should I by pass it and make it a garage use only fan (monitored fan)?

Thanks everyone for the help,
Chris

[stj]

Re: Electric Motor Question....

thats a thermal fuse.
bypass it and see if everything works
if it does, we can find a cheap source of them - pay attention to the markings on it - they com in different temp ratings