Service mode error on coating unit cd74

Discussion in 'Heidelberg Printing Presses' started by Jack liston, Aug 25, 2022.

  1. Jack liston

    Jack liston Senior Member

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    Hello gentleman we have service code on coating unit , can't clear coating pump will not run any input appreciated, thanks Jack
     
  2. Adil

    Adil Senior Member

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    What machine are you talking about? And what exactly is your error code?
    Can you provide pictures?
     
  3. Mechanica Speedmaster

    Mechanica Speedmaster Member

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    There are 2 main different types of pumps: LVG (membrane) or CoatingStar. Which one do you have equiped on your press. Send me press serial number or describe more about your issue as Adil mentioned above.
     
  4. Jack liston

    Jack liston Senior Member

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    Update. Bad board .replaced.
     
  5. Adil

    Adil Senior Member

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    Jack, what is your problem? I haven't been able to figure it out so far?
    If you describe your problem well or if there are errors send them in images
     
  6. Jack liston

    Jack liston Senior Member

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    The issue is that the coating pump will not turn on when the pump on button is selected on panel/the pump will turn on briefly when the service button is pushed .cp2ooo shows varnish supply unit service mode. Error we checked relay it has continuity. We think board is compromised. I appreciate any thoughts thanks!
     
  7. Mechanica Speedmaster

    Mechanica Speedmaster Member

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    Hi Jack,
    i still have no answer if you have a LVT500 pump or CoatingStar... If you have a LVT500 try to disconect the two membrane sensors. You can find them under each membrane housing- orange cable. Just unplug the wire and check.
     
  8. Adil

    Adil Senior Member

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    Give me a screenshot of the error message page, and I'll show you what you're going to do; that error message you quoted appears for almost all coating problems.
    Send me a photo to know the code of the error message
     
  9. Jack liston

    Jack liston Senior Member

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    Thanks will try to send pictures
     
  10. Adil

    Adil Senior Member

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    OK
     
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  11. Jack liston

    Jack liston Senior Member

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    Thank you mechanica. It appears the issue was resolved. The technotran people were in during day and fixed another issue - coater now working. Will have to get more information.
     
  12. Mechanica Speedmaster

    Mechanica Speedmaster Member

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    Thanx for info, it would be nice to hear what was the reason for failure...
     
  13. Jack liston

    Jack liston Senior Member

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    Stop the presses the fault has returned Lvt 505e coating pump .tech coming tomorrow will let you know
     
  14. Adil

    Adil Senior Member

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    I l still waiti for picture
    I 'm still waiting for picture !!
     
  15. Jack liston

    Jack liston Senior Member

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    HELLO Adil as you know many causes for this error pan sensor / gate sensor/ communication error. Heidelberg has been in and can not find issues yet will keep informed.
     
  16. Adil

    Adil Senior Member

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    Please sir .
    Give me picture of your error message to show you what to do .
    Show me please all you screen because i will tell you which boutton you will push again
     
  17. Jack liston

    Jack liston Senior Member

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    The control board was replaced on coaster now working
     

  18. Adil

    Adil Senior Member

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    Good job
     
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