Electronic – Unknown induction motor wiring

inductioninduction motormotor

I just took apart an old dishwasher for parts. The large motor I got from it seems to be an induction motor. It has 4 wires. Green, yellow, red, and blue. I know for a fact that the green one is ground, so it can be ignored. It also had a 15uF capacitor for the motor, but I'm not sure how it was connected. The dishwasher is at a different house so I can't look now, but if I need to know how the cap was connected I could look next time I'm there. How can I figure out how to wire this motor? In case this helps, it is model 5kcp122e1bx, but I can't find much info about it online.

I just measured the resistance between the leads. blue to red is 16 ohms, blue to yellow is 4 ohms and yellow to red is 20 ohms. 16+4 = 20, so that means there isnt really a winding between the yellow and red. This makes me pretty sure that blue is a common, red is main coil and yellow is a start coil. That is what I would have guessed just looking at the wire colors. But having a second differently sized start coil, wouldnt that usually mean that the motor is resistive start and doesnt use a capacitor? I guess I am wrong as i obviosly has a capacitor. So how do I wire it up?
Thanks!

Best Answer

The motor is a permanent split capacitor (PSC) AKA capacitor-run motor. I believe it should be connected as shown below. It would be good to check the current and be ready to shut it off if the current is too high. The normal current should be marked on the washer, but that may include the built-in water heater. The current with and without the heater might be marked.

enter image description here