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  1. #1
    Join Date
    Dec 2005
    Location
    Melbourne, Australia
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    102
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    York ISN Millennium control panel

    Hi Everyone, hope all is well. I have a York Chiller Millennium control panel and the LED display has gone weird on it and unable to read anything. It still lights up, just showing no data info. The data cable is connected to the microprocessor board, the chiller is actual still running. would this be caused from a faulty microprocessor eprom chip or something else? I have tried changing it with another display board that was o.k, but still no reading. Then plugged the existing display board that was working ok back in and now that has no display either. Any ideas? Your help would be greatly appreciated!! Cheers.

  2. #2
    Join Date
    Sep 2007
    Location
    Somewhere in the world.
    Posts
    1,645
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    You have a single line panel ? you said that you changed out the display with another unit did you try replacing the cable , also chances of the eprom being bad are slim because you state that the chiller runs.
    A mind is like a parachute. It doesn't work if it is not open.

    The best part of going to work is coming back home at the end of the day.

    Hard work spotlights the character of people: some turn up their sleeves, some turn up their noses, and some don't turn up at all.

  3. #3
    Join Date
    Sep 2007
    Location
    Somewhere in the world.
    Posts
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    Here is a SB for this problem. Most likely something is dragging it down.
    Attached Files Attached Files
    A mind is like a parachute. It doesn't work if it is not open.

    The best part of going to work is coming back home at the end of the day.

    Hard work spotlights the character of people: some turn up their sleeves, some turn up their noses, and some don't turn up at all.

  4. #4
    Join Date
    Dec 2005
    Location
    Melbourne, Australia
    Posts
    102
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    Hey York56, Thanks for all your information. The 5v power to control panel was all fine. Found, when I disconnected the 12v supply plug from the microprocessor board, then reconnected, the display came back on one chiller, but not the other. The chiller which now shows the display, cannot use key pad to change info.
    While on the other chiller, I cannot even get the display back up. The 12v supply to micro board is all ok. I even tried swapping the ribbon cables, which made no difference. I believe the micro board is faulty, but only on the chips that operate the key pad and display boards. What do you think?? Thanks again!

  5. #5
    Join Date
    Feb 2008
    Location
    Ringgold GA
    Posts
    152
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    i would make sure ribbon cables are still good, the keypad cable does seperate sometimes not noticable but still affects the keypad.
    We aren't service engineers, we are service re-engineers!! Work is what you make it, have fun.....

  6. #6
    Join Date
    Sep 2007
    Location
    Somewhere in the world.
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    Here is another SB for the keypad troubleshooting check out see if this will help out.
    Attached Files Attached Files
    A mind is like a parachute. It doesn't work if it is not open.

    The best part of going to work is coming back home at the end of the day.

    Hard work spotlights the character of people: some turn up their sleeves, some turn up their noses, and some don't turn up at all.

  7. #7
    Join Date
    Mar 2005
    Posts
    692
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    ONE FOR YCAJ keypad?
    Keep it simple to keep it cool!

  8. #8
    Join Date
    Sep 2007
    Location
    Somewhere in the world.
    Posts
    1,645
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    I don't recall seeing one but I'll take a closer look.
    A mind is like a parachute. It doesn't work if it is not open.

    The best part of going to work is coming back home at the end of the day.

    Hard work spotlights the character of people: some turn up their sleeves, some turn up their noses, and some don't turn up at all.

  9. #9
    Join Date
    May 2010
    Posts
    2
    Post Likes
    hi every body...

    I want to know how can I change the control panel language for YIA absorption chillers?

    if any body can give me the full control panel user guide?

    thank you all

  10. #10
    Join Date
    Dec 2005
    Location
    Melbourne, Australia
    Posts
    102
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    Hey Guys, Just to let you know what happened with the chiller/display prob I had. Got all boards tested, found the display board was faulty, replaced, then the keypad still would not operate. Tested it with another chiller, still not working. Ordered new keypad, replaced, all well again. Expensive parts too. Thanks for everyones help, cheers.

  11. #11
    Join Date
    May 2001
    Location
    Western Wa
    Posts
    2,012
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    You did good.

    A tip of the hat to you, my friend.

    And to those who share info that us in-house guys can't get.
    God Bless our Veterans

    God Bless the USA

  12. #12
    Join Date
    Jun 2007
    Location
    Chicagoland
    Posts
    122
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    Frown YORK YEAJ MICROPROCESSOR PROBLEM

    Where did you get your boards tested, I have the same problem.






    Quote Originally Posted by chill bill View Post
    Hey Guys, Just to let you know what happened with the chiller/display prob I had. Got all boards tested, found the display board was faulty, replaced, then the keypad still would not operate. Tested it with another chiller, still not working. Ordered new keypad, replaced, all well again. Expensive parts too. Thanks for everyones help, cheers.

  13. #13
    Join Date
    Dec 2005
    Location
    Melbourne, Australia
    Posts
    102
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    Hi JKD,
    Got them tested by a local electronics company here in Melbourne, Australia.
    Good luck. Cheers

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