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Thread: True Reach In

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  1. #1
    Join Date
    Mar 2007
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    NW AR
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    True Reach In

    Small hermetic compressor with cap tube metering device. 134a. Found a crack in the overload disc. Replaced disc. Will run for approx one minute then kick out on overload. System has never been tapped into and thus far I havnt added service ports to check pressures. Condenser clean. Entire unit is rated for 7 amps, including compressor, cond fan, evap fan, and lights. Compressor itself is pulling 7.5.

    Would a partially clogged cap tube cause the compressor to trip on overload? Just trying to get thoughts before i install taps.

  2. #2
    Join Date
    Mar 2005
    Location
    burlington county n.j.
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    9,741
    try replacing the relay before you tap into system,a plugged cap tube on untapped system should not increase amps.

  3. #3
    Join Date
    Feb 2004
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    Western New York
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    1,047
    A plugged cap tube would cause lower amps. Lower load, lower draw. Check your motor windings against the book value. I have seen a partially shorted run winding cause that exact problem.
    Experience is what you have an hour after you need it.

  4. #4
    Join Date
    Sep 2002
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    Virginia
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    3,164
    make sure the cond coil is REALLY clean all the way through

    Can you take a flashlight and hold on one side and see light through other ??

    I've come across many coils that "other " companies cleaned , looked great from the front , nice and shiny , but the last row next to fan totally clogged.

  5. #5
    Join Date
    Oct 2012
    Location
    Torrington CT
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    82
    if the condenser was really dirty the 134a could have waxed and plugged the cap tube but it would be cold or icing around the cap tube the start components might be bad bad cap

  6. #6
    Join Date
    Jun 2003
    Location
    Tampa Bay, FL.
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    120
    Put a 1/4-1/3 Supco 3n1 on it and chances are that will solve your problem assuming you don't have an airflow issue. I work on these every day and swear by the 3n1.

  7. #7
    Join Date
    Jun 2003
    Location
    Tampa Bay, FL.
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    120
    Your probably gonna need a compressor soon but a 3n1 should buy you some time. A 1/3hp usually runs 6.5 amps or less.

  8. #8
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    NW AR
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    Sorry didnt mention. Installed the 3 n 1 out as soon as I found the cracked disc. Before installing it the compressor wouldnt run at all. Ohms added up correctly.

    Cond clean as a whistle. When I aquired the account every cond in the joint was clogged and there are a bunch of em. Large bar and grill. Blew em all out but much damage was already done. Two new compressors and cap tubes right outta the gate. Looks like theyre getting another. Thanks for the replies

  9. #9
    Join Date
    Jun 2003
    Location
    Tampa Bay, FL.
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    120
    FYI: if the cooler is anywhere remotely close to a deep fryer, the condenser may appear clean but Is likely coated with a layer of grease which acts as an insulator, reducing its efficiency and raising head pressure and amps. Need a heavy degreaser like oven cleaner to remove it. You probably already know all this, but just throwing it out there.

  10. #10
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    Sep 2002
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    Virginia
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    Oven cleaner ???

    I never thought of that .... does it harm the coil after time ??

  11. #11
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    .

  12. #12
    Join Date
    Nov 2006
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    Southeastern Pa
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    Yep. The Ecolab degreaser is pretty pricey, but the Easy Off Oven Cleaner (Fume Free) spray bottle will dissolve most kitchen grease.

    I like to take the offending appliance outside to use a hot water hose to do a "before and after" rinse. You'd be amazed at how much crap gets trapped in an allegedly "clean" condenser that lives in a kitchen....
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

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  13. #13
    Join Date
    Mar 2007
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    Grease is a beech to get off, i like the oven cleaner idea. This one is nowhere near the kitchen and the condenser sparkles...all the way through.

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