RCM vacuum pump help.

[DATrig]

I'm actually only holding the 4 (2 singles 2 doubles). The two you see behind are from the external capacitor.

[M Gregg]

This is the only way that makes sense..
As I say its at your own risk..

However black to red&black dosen't tie?? <<<<all the other tests do..
you may be able to break it down further..


115
Red////////////Red&Black

50
Black&Black///////////Red&Black

Black(single)<<<connected to Black and Black<<<just a connection

///////////=winding

Regards
M. Gregg

[M Gregg]

Then again perhaps it does..

Think I noted it down wrong..

Regards
M. Gregg

[DATrig]

So Red and R/B are HP or HF or am I simplifying it too much. I guess I don't understand.

[M Gregg]

Looking at the results..
At your own risk..

At this point we don't know which value could be which winding??

You need to some how confirm that 115 is auxilary if you connect it up could you ask someone with this pump to tell you what DC readings they get across each of the terminals on the strip? and check before power up..

We have to assume that 115 could be the auxilary winding..one being 50 the other 115?

This might hold true IF we think:

The single black with 0 ohms...could there be a thermal trip inside the motor?

If there is then the black could be L1 if we follow to the connection B/B what winding does that give us??

Remember this is all possible maybes

This may not be any help until you can prove the values of the windings..and these are only my thoughts..I can only base ideas on what you have posted

Regards
M. Gregg

[M Gregg]

The bottom line is,

Until you get more information from supplier...I would not power up..

You also don't say what current this motor is supposed to draw..
It only looks small so I would think low current..

If 115 is not the aux then how would that fit to the digram that you have?


Regards
M. Gregg

[M Gregg]

Final comment,

I measured the primary of a 6VA mains Tx value over 300 ohms 240V..

I don't know what voltage its running on so...

If you have no choice and no other input from guys that have one of these pumps..You could put a mains lamp in series at initial start. Measure the current..

So if I was to ignore the diagram for a minute then:
High value run winding
With low value aux winding in series with a cap..

Regards
M. Gregg