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  1. #1
    Join Date
    Dec 2014
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    RTHC with a EA starter

    I am looking for a little help with a RTHC that wont start. How does the 1U2 module get the SCRs going before pulling in the bypass contactor? The display acts like it want to start the compressor but the load noise never starts.


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  2. #2
    Join Date
    Mar 2014
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    South Forida
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    What fault is generated?


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  3. #3
    Join Date
    Dec 2014
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    New Mexico
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    Thread Starter
    Loss of oil flow.


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  4. #4
    Join Date
    Mar 2004
    Location
    ottawa canada
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    Quote Originally Posted by Chev5372 View Post
    I am looking for a little help with a RTHC that won’t start. How does the 1U2 module get the SCRs going before pulling in the bypass contactor?
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    It sends a start signal to the SSM after checking the safeties.
    The toy chest is officially full ... I got a new toy..... 2007 Aston Martin V8 Vantage and yes it still gives me goosebumps
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    In the new big shop , greasin', oilin' . tweakin' n shinin' !!

  5. #5
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    Dec 2014
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    New Mexico
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    Thread Starter
    I know its an open forum. So answers will need to be vague. I have power to the SSM, but cannot for the life of me figure out which is the trigger to get the module to start firing. The controller is set for the EA starter so it should know what to do. The timing to bring in the bypass contactor is set right. I wish I had the wiring diagram in front of me to study again, the hotel is boring after a few nights.


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  6. #6
    Join Date
    Mar 2014
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    South Forida
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    Address the fault first make the sensor read wet and run the chiller loaded if possible and take out what you put in to get it started. Test drain/fill solenoids. Just based oil fault response.


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  7. #7
    Join Date
    Dec 2014
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    New Mexico
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    Thread Starter
    I saw a graph on the wiring diagram about the oil sensor, 24 vac dry 0 vac dry. Unplugging the sensor wire , no start , dose there have to be a voltage below 24 vdc? Was more interested to see if she will roll and then check full function.
    Tag says oil48 needed ,10 gallons, how much needed to get the sensor happy. Was used to the oil game with the old York OTs. Thanks for the help so far.


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  8. #8
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    Mar 2014
    Location
    South Forida
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    Usually does take much to read wet. This is a starting point instead of diagnosing optical sensor.


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  9. #9
    Join Date
    Dec 2014
    Location
    New Mexico
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    Thread Starter
    Thanks


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