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Thread: York YT

  1. #1
    Join Date
    Mar 2012
    Posts
    9

    Talking York YT

    Having a problem with Display on Control Panel 031-00954 Display was dead -Old display was Babcock VF-140-04 Replaced with 031-03277-000 Power up unit and Looping selftest. Replaced the uboard and same problem. Any thoughts

  2. #2
    Join Date
    Jan 2011
    Posts
    1,037
    Those single line displays can sometimes cause one fits. I had a couple that proved to be problematic over the years. The probelm was usually one of two things. The connection on the right side of the display that gives the board it's 5 VDC power could be the problem. Make sure you have voltage coming from the power supply board. Second thing I usd to find is that the display pins would come out of the sockets just enough to cause the display to extinguish. Since you replaced the display, I don't think that should be your problem.

    What's the uboard? Microboard?

  3. #3
    Join Date
    Mar 2012
    Posts
    9
    Yes u board is Micro Board. Will check the 5V
    Thank you

  4. #4
    Join Date
    Mar 2012
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    9

    Thumbs up

    Was reading about a reset signal to get out of the looping Self test. Is that the 5v feed from the power supply

  5. #5
    Join Date
    Jan 2011
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    1,037
    You may have a shorted transducer or thermistor causing your problem. Eliminate them one at a time to determine if that's what it may be.

  6. #6
    Join Date
    Aug 2011
    Location
    York, PA
    Posts
    156
    Never understood this completely, but I had a flow switch that was filled with water in the electrical box, didn't blow any fuses but caused the same issue with a blank screen..... partially grounded the micro just enough to cause the issue but not blow the fuse????

  7. #7
    Join Date
    Feb 2010
    Location
    MEXICO
    Posts
    459
    verify that you have 5vdc the display, if correct replace the ribbon cable

  8. #8
    Join Date
    Mar 2012
    Posts
    9
    Had 6 v yesterday today we powered up the panel and the display brd fried. There is 14v there today

  9. #9
    Join Date
    Feb 2010
    Location
    MEXICO
    Posts
    459
    I send you this information I hope will help
    Attached Files Attached Files

  10. #10
    Join Date
    Mar 2012
    Posts
    9
    Replaced Power brd - voltages are now correct - replaced Display brd that he power board fried., Front Panle not all the keys working un unable to get anything by pressing Display selections. Installed original process brd - diaplay keys not working bur Service Keys are not., Ran diag #3 for key pad. Service buttons not working - then they started working. Receiving XXX's for readings when holding down the Display Data key

  11. #11
    Join Date
    Jan 2011
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    1,037
    The keypad has a small cushion of air under each character. If that air is lost the keypad stops functioning. I think you'll need to replace the keypad.

  12. #12
    Join Date
    Jan 2011
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    1,037
    When pressing and holding the display data key, does it scroll through the five or six lines of information? Try this. Press the display hold key and release. Press the display data key and release. Values? Press the display data key again until it scrolls to next line. Values? Continue. Can you scroll through all the functions, but get XXX for values or can you not scroll through all the data lines.

  13. #13
    Join Date
    Mar 2012
    Posts
    9
    When pressing and holding the display data key, it scroll through the five or six lines of information but values are XXX. I will try using the display hold then display data keys.

    Could the Power board taken out the micro processor Brd when it went?

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