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Post by tylercote on Jun 19, 2016 12:55:46 GMT
Hello,
I'm new to this forum and am looking for some help testing my ge refrigerator compressor.
There are three wires coming from the compressor, green,white, and black.
White to Black = 300kohm
Black to Green = 4 ohm.
Is she dead?
What should the values be?
Which pair is the start and which is the run coil?
Thanks in advance for your help!
Tyler.
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Post by ckfan on Jun 19, 2016 16:14:53 GMT
Well, I would assume that the black wire is common, green is start, and white is run. That is how I rewired my flat top compressor. If this is the case then you are testing correct. I find it odd that one of the leads is green when originally I think it should have been red. Do you know if this machine has been rewired? If so, was it done correctly? The measurement from green to black seems OK but the one from black to white seems bad. Don't give up hope yet. Look for breaks in the wire or a badly soldered joint at the compressor leads. In fact, I would take the cover off of the bottom of the compressor and try to measure resistance there. Good luck and keep us posted. These things rarely die.
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Post by ckfan on Jun 19, 2016 16:15:51 GMT
And I should have mentioned...
Black is common
White is run
Green is start
Or at least they should be that...
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Post by cablehack on Jun 19, 2016 23:26:22 GMT
This may help; it's from one of the wiring diagrams in the Scotch Yoke manual.  Your measurements indicate the start winding is open circuit. I recall one incidence of this on the Flickr forum where someone had attempted to run a flat top without a start relay; i.e. ran it only on the start winding. It burnt out overnight. However, as ckfan says, check right at the compressor terminals and make sure the connections are clean when doing the test. You can also test the motor by connecting 120V to the run winding (black & green), then momentarily bridging the green and white to attempt to start it - ideally you'll see a spark when you touch the connection, and the motor will come up to speed. Do not leave the white wire connected for more than a few seconds. This test must be done very quickly within a few seconds, and if the motor doesn't start straight away, disconnect the power or the run winding will burn out. |
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