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Thread: Tunze Stream 3 Apex only one of two Pumps working

  1. #1
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    Tunze Stream 3 Apex only one of two Pumps working

    Hi there,
    i have a question regarding my Tunze Setup. I have a Tunze Apex Control Cable connected to my two Tunze Stream 3. The Tunze Cable is connected to the L3/4 Port of the Apex Classic. Only one Pump seems to respond and Varies Speed depending on my programming. The other Pump always goes full speed when i connect the Tunze End of the cable. If i switch the Tunze cabel between the pumps the problems carries to the the other pump. Since the Tunze/apex cable is short i used a CAT5 cabel with an CAT6 coupling to connect. Any idea what i am doing wrong?
    Regrads Johannes

  2. #2
    New User
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    Hi,
    after much testing and trying different ports i think my cable is the problem. my cable seems to have yellow and black mixed up. i think the correct setup is from left to right Pin1-10 yellow,green,red,black and then again yellow,green,red,black. my cable has yellow,green,red,yellow,black,green,red,black. i assume thats not correct and yellow and black pin 4 and 5 are mixed up. can anybody confirm this?
    Regards Johannes

  3. #3
    Frequent Visitor
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    You can check page 129 of the comprehensive manual in Neptune Web Page.
    You will have there a full schematics for the cable.

    https://www.neptunesystems.com/downl...nce_Manual.pdf

    All the best,
    Rui

  4. #4
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    Thank you Rui,
    that confirms that i have a faulty cabel and i will contact my European neptune distributor.
    Regards Johannes

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