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Compressor readings

Compressor readings

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Thread: Compressor readings

  1. #1
    Join Date
    May 2013
    Posts
    1,465

    Default Compressor readings

    I watched a video of a guy checking windings in a dorm size like fridge. I think his readings were lik 15, 15, and 30.

    The normal size fridges I have checked used to read like 4, 7, and 11.

    The one I recently posted about shows like 3, 4, and 8. It is the one that did not want to start with power connected directly to it, but when I bypassed the temp control and left the 3-1 on it, it started right up. Is this compressor weak?

    I intend to check it again with the 3-1 removed and power connected directly before I buy start relay kit and control.

  2. #2
    Join Date
    Feb 2012
    Location
    Canada
    Posts
    2,330

    Default

    Is this compressor weak?
    Only ways to tell that is take an amp reading....is it running lower amps than it should be when running which would indicate the compressor is not working very hard.....and/or take a pressure reading from the low side. Higher than normal low side pressure would indicate the compressor is not working very hard.

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

  3. #3
    Join Date
    May 2013
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    1,465

    Default

    1.5 and up be high amperage reading?

  4. #4
    Join Date
    Feb 2012
    Location
    Canada
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    2,330

    Default

    Depends on the compressor...

    LRA is 15.8 amps Compressor readings-01238375-jpg Running current would be approx 1.6 amps

    LRA is 13.8 amps Compressor readings-01798084-jpg Running current would be approx 1.4 amps

    LRA is 12.6 amps Compressor readings-01299285-jpg Running current would be approx 1.3 amps

    LRA is 18.2 amps Compressor readings-01113292-jpg Running current would be approx 1.8 amps

    You seeing a pattern here?

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

  5. #5
    Join Date
    May 2013
    Posts
    1,465

    Default

    You seeing a pattern here?
    Starting to come to me now. Makes sense they would pull a little more than 1 or 2 100 watt light bulb.

    Now if I can just figure this amp meter out as in which scale to read.

    Then again, I could just put the digital in series and maybe get a good reading.

    I did look on the compressor for the amperage, but it is either turned so I cannot see it or I just did not recognize the "LRA"

    Thanks.

  6. #6
    Join Date
    Feb 2012
    Location
    Canada
    Posts
    2,330

    Default

    LRA is Locked Rotor Amps....start up amps....and running amps is approx 10% of the LRA ( + or - a little is fine ).

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

  7. #7
    Join Date
    May 2013
    Posts
    1,465

    Default

    Yeah, LRA of 18.2 should have around 1.8 running amps.

    I had seen a video where a guy was saying there might be a problem if the amps got above 1.5. I see now he was making too broad a statement.

  8. #8
    Join Date
    Feb 2012
    Location
    Canada
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    2,330

    Default

    I see now he was making too broad a statement.
    Yup, I tend to agree.

    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

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