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  1. #1
    Join Date
    Oct 2002
    Location
    Hamden Ohio
    Posts
    242

    Trane TWX030C100A0 Defrost Board

    Went to work on a TRANE TWX030C100A0 and the defrost board has a green light was flashing and making a clicking sound. This is not the original board and the paper work is gone. Anybody know what this means .If I remember right the original board in these units was a lot bigger than this one and had a red light and a wire you moved around to test it. This one has four pins.

  2. #2
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
    5,013
    Quote Originally Posted by coyote View Post
    Went to work on a TRANE TWX030C100A0 and the defrost board has a green light was flashing and making a clicking sound. This is not the original board and the paper work is gone. Anybody know what this means .If I remember right the original board in these units was a lot bigger than this one and had a red light and a wire you moved around to test it. This one has four pins.
    That should be the latest replacement control board (Lite Port CNT04368) for the original board (CNT01129).

    FLASH RATE INDICATIONS:

    1 — Flash/Second = Normal operation

    2 — Flashes/Second = Fault A (Low Delta T) Inoperative Compressor, loss of charge, open amb. sensor, shorted coil sensor.

    3 — Flashes/Second = Fault B (20 defrosts terminated on time), and Fault C (High Delta T) SOV stuck in heating, shorted amb. sensor, open coil sensor, closed TXV, OD fan motor failure, OD fan on in defrost, undercharged unit.

    4 — Flashes/Second = Fault A & C or A & B

    Send me an email (address is in my profile), and I will get some info off to you on these defrost controls.
    Instead of learning the tricks of the trade, learn the trade.

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