SM74 Delivery fan wire connection

Discussion in 'Heidelberg Printing Presses' started by narayan, Oct 5, 2018.

  1. narayan

    narayan Member

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    I need wire connection diagram for SM74 Delivery Fan (ebm papst). The new fan has Red(+), Blue(-), White(Tach) and Purple (PWM) where as machine has White,Gray,Brown, Green. Need to know which wire connects to which

    Thanks
     
  2. CHOCK

    CHOCK Senior Member

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    Hi sir
    Red(+)=White(+24Vdc Old) Blue(-24Vdc)G=Gray(-24Vdc) .
    Rest according with the Schematic D.
    Blessing
    superchock@yandex.com
    Mobile+WhatsApp:+505 8861 1441
     
  3. narayan

    narayan Member

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    Thanks. can you tell me which is Tach and PWM wire color in machine? Is it Tach= Brown and PWM= Green?
     
  4. CHOCK

    CHOCK Senior Member

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  5. narayan

    narayan Member

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    Fan EBMPAPST.jpg Connected the fan but the result was abnormal. then new fan speed is reversed. when speed is set to high new fan slows but others are high. when speed is set to low new fan speed is high and other slows down. What can be the problem?. Machine is 2008 model. Fan model is Vario-Pro 4114N/37HPR
     
  6. junker1984

    junker1984 Senior Member

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    Since it is running backwards, it's seems clear to me you must exchange the (+) and (-) leads.
     

  7. CHOCK

    CHOCK Senior Member

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    Good morning
    Please put the Red(+) in the black(-) and vice-versa in other words exchange.
    Please Let me know.
    Blessing
    superchock@yandex.com
    Mobile+WhatsApp:+505 8861 1441
     
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