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  1. #1
    Join Date
    Mar 2012
    Location
    NORTH CAROLINA
    Posts
    2

    trane rtaa unknown diagnostic

    I am working on a trane rtaa080. I am getting a 674 unknown diagnostic. has anyone ever seen this? Thanks for any input.

  2. #2
    Join Date
    Jul 2007
    Location
    The Hot South
    Posts
    1,317
    This should be moved to the chiller forum.

  3. #3
    Join Date
    Jul 2007
    Location
    The Hot South
    Posts
    1,317
    Actually, that fault is b74. This unit must have been manufactured between March 1, 1997 and April 21, 1997. During that time period, they had a bug in the software for the CLD. It should read "Cond Fan Vari Speed Fault Ckt 2". The fan inverter is in a fault and needs to be checked.

    KIT06170 is a replacement eprom kit for the clear language display to resolve the unknown diagnostic.

  4. #4
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,119
    Moved to chiller forum.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  5. #5
    Join Date
    Mar 2012
    Location
    NORTH CAROLINA
    Posts
    2
    Thank you, I will proceed in this direction and add it to my notes.

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