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  1. #14
    Join Date
    Nov 2009
    Posts
    24
    what if they are configured for the " CHHN " compressor like what is in the unit. can u think of anything else?

  2. #15
    Join Date
    Nov 2009
    Posts
    24
    I took extra time on this chiller to make sure the coils are clean. Fans do work and right direction. Head pressure is around 200 psi

  3. #16
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,110
    Well if the config is right ,the coils are super clean ,the sat condenser and oil temp sensors are correct then it would have to be dirty oil filters ??
    The toy chest is officially full ... I got a new toy..... 2007 Aston Martin V8 Vantage
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    Best Austin Healey In Show twice in 2013 .....All those hrs paid off .

  4. #17
    Join Date
    Nov 2009
    Posts
    24
    pressure drop across oil filter is 4 psi

  5. #18
    Join Date
    May 2006
    Location
    N.E. IA
    Posts
    516
    Quote Originally Posted by Dave_87 View Post
    what if they are configured for the " CHHN " compressor like what is in the unit. can u think of anything else?
    I can't remember the exact lettering of the compressors. I think there are only two models. Ours were configured for the opposite compressors than were actually on the machine.

    It was a situation where we took over a contract when the chillers were a couple years old and then mysteriously they started having this "Oil Control Fault" problem. How do you suppose that happened? You don't think the previous contractor was a little disgruntled they lost the contract?

    Just like you, they would run for several hours, and then when they'd cycle off the alarm would show up.

    Chillrdude explains exactly how it works. The controls test for oil pressure control integrity at each shut down.

    Go through the entire configuration and make sure it's configured for the machine you actually have.
    "Wheel" mechanics work on "Wheel" chillers

  6. #19
    Join Date
    Nov 2009
    Posts
    24
    Ok. I'll go through the configs again. Your right there are only two " CHHN and CHHB".

  7. #20
    Join Date
    May 2006
    Location
    N.E. IA
    Posts
    516
    Quote Originally Posted by Dave_87 View Post
    Ok. I'll go through the configs again. Your right there are only two " CHHN and CHHB".
    That's it.!!! Been a while. This one was configured for CHHB when it actually had CHHN compressors. Gotta read the diagnostics word for word. Some times what you think you're reading, isn't what it's saying.

    Good luck and let us know what you found out.
    "Wheel" mechanics work on "Wheel" chillers

  8. #21
    Join Date
    Nov 2009
    Posts
    24
    I'll check it in the morning and let ya'll know.

  9. #22
    Join Date
    Nov 2009
    Posts
    24
    You was 100% correct. I give you an adiboy!!!! Thank you so much for you help!!! Configured for 200 ton chiller and chhb compressor.

  10. #23
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,110
    Moral of the story....... post the exact information and readings and you will get to the root of the problem much faster .
    The toy chest is officially full ... I got a new toy..... 2007 Aston Martin V8 Vantage
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    Best Austin Healey In Show twice in 2013 .....All those hrs paid off .

  11. #24
    Join Date
    May 2006
    Location
    N.E. IA
    Posts
    516
    Quote Originally Posted by graham View Post
    Moral of the story....... post the exact information and readings and you will get to the root of the problem much faster .
    Actually, He did in his very first post. We just didn't read it correctly. Sometimes what you think you saw, isn't always what's really there.

    RTAA 1254 trane chiller

    unit is going off on "oil flow control" both compressors. unit does not have oil flow control or oil pressure switch. it is monitored by temp. thermistors. This diagnostic code is not in the book. Does anyone know what this is?
    "Wheel" mechanics work on "Wheel" chillers

  12. #25
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,110
    Your right he did . Sometimes you cant see the forest for the trees .
    The toy chest is officially full ... I got a new toy..... 2007 Aston Martin V8 Vantage
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    Best Austin Healey In Show twice in 2013 .....All those hrs paid off .

  13. #26
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
    3,725
    Come on you Trane guys yall are slipping a little bit on this one !!!!
    UA 100

    It takes three people to do anything around here. Two do the work, one explains to the crowd of people who showed up when they seen smoke and flames.

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