Please Help Heidelberg SM74 2008 chillier Problem

Discussion in 'Heidelberg Printing Presses' started by Prodip Ahmed, Oct 24, 2025.

  1. Prodip Ahmed

    Prodip Ahmed Member

    Joined:
    Oct 2025
    Messages:
    7
    Location:
    USA
    Dear all,
    Need one help,
    Today, the pipe on one of the rider rollers (or a specific coolant/rider pipe) of my Heidelberg SM74 machine burst. It was later replaced. After that, when I tried to turn the chiller on, I found that the compressor had no gas (refrigerant). A leak was found, it was welded, and then gas (refrigerant) was recharged.

    Following this, when I tried to start the chiller, I noticed that the chiller compressor and up fan not turning on automatically and the Errors shown in the picture are appearing.

    Please help me with some advice.how to solved this problem and how to reset this chillier.

    Advance thank you.
     

    Attached Files:

  2. Mathew

    Mathew Senior Member

    Joined:
    Apr 2010
    Messages:
    635
    Location:
    Kolding-Denmark
    Hi Ahmed
    TC Compressor 1 error doesn't let the compressor turns ON. Compressor motor protection switch has a NO contact, probably this contact is faulty. Make a bridge and check if it helps.

    Good luck
     
  3. Prodip Ahmed

    Prodip Ahmed Member

    Joined:
    Oct 2025
    Messages:
    7
    Location:
    USA
    I am manually press the magnetic conductor then Compressor is on.but not run the automatic compressor.

    Thank you.
     
  4. Mathew

    Mathew Senior Member

    Joined:
    Apr 2010
    Messages:
    635
    Location:
    Kolding-Denmark
    That's not the right way, you may damage the compressor or evaporator. I highly recommend to fix it.
     
  5. Prodip Ahmed

    Prodip Ahmed Member

    Joined:
    Oct 2025
    Messages:
    7
    Location:
    USA
    Thank you.
    Can i try to 1st Replace this MPCB? 8F1?

    Thank you.
     

    Attached Files:

  6. Mathew

    Mathew Senior Member

    Joined:
    Apr 2010
    Messages:
    635
    Location:
    Kolding-Denmark
    That's right, as you can see, NO auxiliary contact is sitting on top of the MPCB. It can be replaced separately. If you make a bridge between 13 and 14, the compressor should start.
     
  7. Prodip Ahmed

    Prodip Ahmed Member

    Joined:
    Oct 2025
    Messages:
    7
    Location:
    USA
    13 and 14 is connect by cannector and on chillier but not solved problem. Also change new MPCB. But not run.

    Thank you.
     
  8. Mathew

    Mathew Senior Member

    Joined:
    Apr 2010
    Messages:
    635
    Location:
    Kolding-Denmark
    Ok, can you send a photo from the compressor and name plate
     
  9. Prodip Ahmed

    Prodip Ahmed Member

    Joined:
    Oct 2025
    Messages:
    7
    Location:
    USA
    Last two year ago we are change this Compressor.
     

    Attached Files:


  10. Mathew

    Mathew Senior Member

    Joined:
    Apr 2010
    Messages:
    635
    Location:
    Kolding-Denmark
    I'm not sure how much experience you have as an electrition. Check the relevant input for 8F1. It goes to TIOM 121 module, sitting inside the electric cabinet above the compressor. Check if input 3 on X3 is active or not.
     
Loading...