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  1. #14
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    Exactly it is not failing it's just over temp I have watched it crawl up to 210 and shut down, as far as the strainers I hear ya well i'll have to put a strainer back in there.

    Thanks for the feedback!

  2. #15
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    Have you tried to disconnect the loaders to keep it from loading up to see if it will stay online ?
    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.

  3. #16
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    In a mechanical room....
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    it's a screw chiller so their slides and it has exv's so the scb "screw control bd" would go into alert and shut the compressor down

  4. #17
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    Quote Originally Posted by chrishvacman View Post
    it's a screw chiller so their slides and it has exv's so the scb "screw control bd" would go into alert and shut the compressor down
    I think you need to read the manual to figure out what your working on.
    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.

  5. #18
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    Jul 2009
    Location
    In a mechanical room....
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    Confused

    Why whould i have to read the manual I know exactly what i'm working on it's a screw compressor which varys capacity via slides/ Varry slide position loading ect.... Reads liquid level ect.

    Right from carriers manual

    Screw Compressor Board (SCB) — The SCB has
    8 inputs along with 2 analog and 5 discrete outputs. The SCB
    module communicates the status of the inputs with the MBB
    and operates the oil heater (30GXN,R only), cooler heater
    (30GXN,R only) and oil pump outputs.

    ComfortLink Compressor Protection (CCP)
    Board — The CCP board monitors the high-pressure
    switch status, running current and motor temperature for each
    compressor. Each CCP board controls up to 2 compressors.
    The CCP board also controls the motor cooling solenoid, oil
    solenoid and contactor outputs. A pre-punched configuration
    header for each compressor determines the must trip amps
    setting. Each CCP board sends the MBB each compressor's
    motor temperature, relay status and running current as a
    percentage of the must trip amps value. The CCP board also
    communicates any alarm conditions as the feedback value.

    Capacity Control — The control system cycles compressors,
    loaders, and minimum load control valves to maintain
    the user-configured leaving chilled fluid temperature set point.
    Entering fluid temperature is used by the microprocessor to
    determine the temperature drop across the cooler and is used in
    determining the optimum time to add or subtract capacity
    stages. The chilled fluid temperature set point can be automatically
    reset by the return fluid temperature, space temperature or
    outdoor-air temperature reset features

    I can't just unplug the unloader on a screw compressor slide "cap valve"

  6. #19
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
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    Quote Originally Posted by chrishvacman View Post
    Why whould i have to read the manual I know exactly what i'm working on it's a screw compressor which varys capacity via slides/ Varry slide position loading ect.... Reads liquid level ect.

    Right from carriers manual

    Screw Compressor Board (SCB) — The SCB has
    8 inputs along with 2 analog and 5 discrete outputs. The SCB
    module communicates the status of the inputs with the MBB
    and operates the oil heater (30GXN,R only), cooler heater
    (30GXN,R only) and oil pump outputs.

    ComfortLink Compressor Protection (CCP)
    Board — The CCP board monitors the high-pressure
    switch status, running current and motor temperature for each
    compressor. Each CCP board controls up to 2 compressors.
    The CCP board also controls the motor cooling solenoid, oil
    solenoid and contactor outputs. A pre-punched configuration
    header for each compressor determines the must trip amps
    setting. Each CCP board sends the MBB each compressor's
    motor temperature, relay status and running current as a
    percentage of the must trip amps value. The CCP board also
    communicates any alarm conditions as the feedback value.

    Capacity Control — The control system cycles compressors,
    loaders, and minimum load control valves to maintain
    the user-configured leaving chilled fluid temperature set point.
    Entering fluid temperature is used by the microprocessor to
    determine the temperature drop across the cooler and is used in
    determining the optimum time to add or subtract capacity
    stages. The chilled fluid temperature set point can be automatically
    reset by the return fluid temperature, space temperature or
    outdoor-air temperature reset features

    I can't just unplug the unloader on a screw compressor slide "cap valve"
    Like I said read the manual. I can`t help getting pretty close to the DIY threshold for me.
    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.

  7. #20
    Join Date
    Jul 2009
    Location
    In a mechanical room....
    Posts
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    I'm not understanding what your getting at i have had this chiller and all of it's issues figured out since the middle of the thread.



    The End

    I am not asking for help I have taken care of the problem new to the fourm and not sure how long you guys keep this crap going thats all


    ps, I still don't understand why you keep telling me to read the manual. Wierd!

  8. #21
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
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    Quote Originally Posted by chrishvacman View Post
    I'm not understanding what your getting at i have had this chiller and all of it's issues figured out since the middle of the thread.



    The End

    I am not asking for help I have taken care of the problem new to the fourm and not sure how long you guys keep this crap going thats all


    ps, I still don't understand why you keep telling me to read the manual. Wierd!
    I think you are only seeing a piece of the picture. Good Luck with is all I can say!!!!beat22
    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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