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  1. #1
    Join Date
    Aug 2012
    Location
    Statesboro, Ga
    Posts
    6

    american standard compressor windings

    what should the compressor windings ohm out at in an American Standard (Trane) [three phase] model # CSHC075R0A00? I am getting .47kOhms/351Ohms/97Ohms.

  2. #2
    Join Date
    Jun 2012
    Location
    East tx
    Posts
    164
    They need to be even between all three legs. Make sure you test at compressor terminals without wires connected to get an accurate reading.

  3. #3
    Join Date
    Sep 2008
    Location
    Western PA
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    25,855

  4. #4
    Join Date
    Aug 2012
    Location
    Statesboro, Ga
    Posts
    6
    those readings are with all wires removed and the breaker kicks off each time power is applied and the 208 leg was burned at the disconnect upon my arrival. I think the compressor is shorted and needs to be replaced but checking to be sure before I condem the part. thanks

  5. #5
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,855
    Your readings do not indicate a short.

    .47kOhms actually qualifies as an OPEN winding in my book.

    The problem may still be with the compressor, but you haven't provided enough information to determine for sure.

  6. #6
    Join Date
    Dec 2005
    Posts
    1,921
    Quote Originally Posted by newjack View Post
    what should the compressor windings ohm out at in an American Standard (Trane) [three phase] model # CSHC075R0A00? I am getting .47kOhms/351Ohms/97Ohms.
    If those numbers are true, then the compressor is dead.

  7. #7
    Join Date
    Apr 2010
    Location
    Minnesota
    Posts
    520
    Those numbers seem kindof weird, maybe get an opinion from another meter? You should also check the CC heater to ground, if it has one. Also check each winding to ground.

    BTW to address your question, usually you'll get .7 to 2 ohms between each winding.

  8. #8
    Join Date
    Aug 2012
    Location
    Statesboro, Ga
    Posts
    6
    those are the true numbers and I think the compressor is dead also but just wanted conformation

  9. #9
    Join Date
    Aug 2012
    Location
    Statesboro, Ga
    Posts
    6
    reading were done with a fieldpiece hs36 meter and checked multiple times to be sure accurate, as I stated earlier the pwr kicked at breaker box and 208 wire was burned at disconnect when I arrived, breakers and disconnect are good and so is contactor on unit, did every electrical ck I could think of and compressor windings were only thing out of wack and this is a 3 phase so should have been same on ea leg of compressor winding.

  10. #10
    Join Date
    Aug 2002
    Location
    Southold.calm
    Posts
    6,053
    Quote Originally Posted by newjack View Post
    reading were done with a fieldpiece hs36 meter and checked multiple times to be sure accurate, as I stated earlier the pwr kicked at breaker box and 208 wire was burned at disconnect when I arrived, breakers and disconnect are good and so is contactor on unit, did every electrical ck I could think of and compressor windings were only thing out of wack and this is a 3 phase so should have been same on ea leg of compressor winding.
    Did you also check each leg to ground?

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