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  1. #1
    Join Date
    Aug 2012
    Posts
    9

    load and unload solenoid

    100 ton train compressor load solenoid seems to work as intended unload has low amp read. Codes (low evap rfgt temp) would like information on that please. For a. RTAA2404XNOIA3D0BFG0

  2. #2
    Join Date
    Dec 2008
    Location
    Dixiana, AL
    Posts
    2,610
    Quote Originally Posted by ed-man View Post
    100 ton train (TRANE) compressor load solenoid seems to work as intended unload has low amp read. Codes (low evap rfgt temp) would like information on that please. For a. RTAA2404XNOIA3D0BFG0
    Re-read your post with the thought in mind that just because you know what you're thinking doesn't mean that the rest of the world knows.........

    Then ask your question again.

  3. #3
    Join Date
    Mar 2011
    Location
    North Carolina Piedmont Area
    Posts
    449
    Ed-man, how long does this unit run for, what are your actual suction and discharge pressure readings. Does it go through its start and transition? What are the amps at start up and how long does it take to start loading up.
    Have you already ohm'd out the saturation and suction temperature sensors. Have you checked voltage drop. How about water flow? What is the entering water pressure versus leaving water pressure. What circuit No. are you having trouble with.

    Cover the basics and the problem will present itself-- Hopefully

  4. #4
    Join Date
    Mar 2011
    Location
    North Carolina Piedmont Area
    Posts
    449
    It is possible that you have a unload/load problem which may be causing a low suction saturation temperature. It is important to watch the amp draw at start up which should be around 33% and load up gradually. Watch amp draw increase slowly as this will indicate loading. It sounds like you may be loading too quickly which may be caused by an oil flow/pressure problem. Have you checked the oil level in the separator and how high/low is it? Also what is the oil pressure differential and are you sure that the oil filter is unrestricted.

    Here is a bulletin which may not be the exact one for your unit but will give you and idea. Verify your maximum recommended oil pressure differential for your unit : Diagnostic troubleshooting bulletin RTAA-SVD01A-EN

    _________________________________________________
    Understand the symptoms and you will find a solution.

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