CJT wrote:
NATE Certified Heating and Air Tech wrote:
On Tue, 23 Sep 2008 09:18:29 -0500, "HeyBub"
wrote:



On a more positive perspective, how does one determine whether the
compressor is seized?


By ohming out the windings, commont to run, common to start, run to
start and common to ground. See here for further information:
http://www.snipsmag.com/Articles/Fea...00f932a8c0____


How does an electrical resistance measurement reveal a mechanical seize-up?

Checking the electrical resistance of
the windings won't indicate a seized
compressor. It will indicate a shorted
or open winding. I also check for a short
to the metal case of the compressor. What
I look for is high current draw. If all
the electrical components are OK and I
measure a high current draw before the
internal overload opens up, that's a good
indication of a seized compressor. A three
phase compressor can be checked by switching
two of the leads to try to break it loose
by running the motor in reverse. There
are compressor analyzers available that
can reverse a single phase compressor to
break it loose if it is not severely
damaged. Here's a link to one of them:

http://tinyurl.com/3nowtq

[8~{} Uncle Monster