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  1. #1
    Join Date
    May 2018
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    TRANE CHILLER (CH530) ON OVERLOAD TRIP COMPRESSOR 2B

    When the chiller starts running compressor 2B is always the first to always picks, i discovered the compressor 2B starts with a high starting current of about 670Amps (which is not normal) immediately the overload trips alarm comes up and generator powering the chiller shutdown due to this high starting. Pls why is the compressor 2B pulling this high current and popping up this alarm?

  2. #2
    Join Date
    Mar 2017
    Location
    Orange County, CA
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    Nobody will be able to answer that question based on what you wrote.


    Sent from my iPhone using Tapatalk

  3. #3
    Join Date
    May 2018
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    Thread Starter
    What I meant is that whenever the compressor 2B picks an overload trip compressor 2B alarm comes up, could it mean something is wrong with the compressor?

  4. #4
    Join Date
    Nov 2011
    Location
    East Side
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    Chiller model?

  5. #5
    Join Date
    May 2018
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    Thread Starter
    The chiller model is RTAC 300tons

  6. #6
    Join Date
    Jan 2010
    Posts
    19,279
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    What's the letter after 300 in the model number ?
    Also digit #27 ( a number )
    Attached Thumbnails Attached Thumbnails Screenshot_20200401-040234.png  
    Last edited by VTP99; 04-01-2020 at 04:11 AM.

  7. #7
    Join Date
    Apr 2018
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    Compressor is probably starting fully loaded. Possible stuck slide valve.

  8. #8
    Join Date
    May 2018
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    Thread Starter
    Quote Originally Posted by VTP99 View Post
    What's the letter after 300 in the model number ?
    Also digit #27 ( a number )
    @ VTP99, From the name plate: The chiller model is Trane RTAC375DEZ0HCUFXW3XYXBAXXX1H33XLDAEXX meaning the chiller is a RTAC (Rotary Air-cooled chiller with a capacity of 375 Nominal Tons
    Attached Thumbnails Attached Thumbnails RTAC CHILLER.jpg  

  9. #9
    Join Date
    May 2004
    Location
    Salt Lake City/Tooele
    Posts
    5,431
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    Manufactured near the town of, Remulak.

  10. #10
    Join Date
    Jan 2015
    Location
    Somewhere making cold water
    Posts
    268
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    Bearings most likely going bad. Perform a vibration test if it ever start, that data will tell you bearings.


    Sent from my iPhone using Tapatalk

  11. #11
    Join Date
    Oct 2004
    Location
    Metro ATL
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    Quote Originally Posted by WYLBEK View Post
    Bearings most likely going bad. Perform a vibration test if it ever start, that data will tell you bearings.


    Sent from my iPhone using Tapatalk
    My money is on the slide valve being stuck or rotor locked. Either way you need to isolate and evacuate the compressor and do some internal checks. The tolerances in these compressors is so tight that a bearing failure typically ends up manifesting itself in the form of a locked rotor. Slide valve issue = field repairable. Bearing issue/locked rotor = compressor replacement.

    Also, is this across the line or y-delta start? A compressor trying to start in the delta configuration can also cause high amp draw and trip.

  12. Likes milkyway liked this post.
  13. #12
    Join Date
    Mar 2018
    Posts
    47
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    check for loose electrical connections

  14. #13
    Join Date
    Nov 2015
    Posts
    1
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    this fault may because of below following issues

    Check the condition of unloading solenoid coil (Should energize before start the compressor)

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