No solenoid found

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David and Melissa Ruth
We had our sprinklers rewired and the system worked for a time but now it says it's working but isn't. When I try to scan for valves, it says no solenoid found even though the solenoid is new. Sprinkler guy thinks it's the box as he has checked all the wires. Any ideas?
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  • Official comment
    Aeon Matrix

    Hi David and Melissa,

    We will need more information from you, for example, your Yardian ID.
    Please send it to support@aeonmatrix.com.
    We also need to know if this happens to one of your zones or all of them.

    Best Regards,
    Joseph

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  • Ryan Fertig

    Experiencing the same issue. Yardian Pro.

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  • Aeon Matrix

    Usually it is the wiring issue especially the common wires if it affects all the zones.

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  • Ryan Fertig

    My system worked fine with the old box, I swapped to the yardian pro with the same wiring points transferred and nothing. I don't think the common would be different for the two boxes. It worked with my old controller, doesn't with the new.

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  • Aeon Matrix

    Hi Ryan,

    We will send you a replacement if it's the hardware issue.
    We've seen similar cases so we would like your help to confirm it.
    Could you put your old controller back, just with the common and one of the zone wire, and run the zone again?

    Please let us know through your ticket and we will send a replacement once it's confirmed.
    Thanks a lot for your help.

    Best Regards,
    Joseph

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  • Ryan Fertig

    I tried that and the old one still works. I don't seem to have a ticket setup. Can you setup one for me?

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  • Aeon Matrix

    Thanks Ryan for the information.

    I am sending email directly to you for the replacement.

    Best Regards,
    Joseph

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  • Aeon Matrix

    Yardian will measure the electrical current flowing through the solenoids to determine whether the zone exists when doing auto scan. If the wires are not connected properly or the wires are too old, the current measured might be lower than our threshold of 80mA. If this happens to all the zones, then the common wire should be checked.

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  • Jeff Thompson

    Hi, I had the same issue after installation, scanned for valves multiple times and no solenoids found. The next day, a scan found all but one of my zones. I keep scanning hoping the last zone shows up!

    Have you seen this behavior before?

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  • Aeon Matrix

    The controller can only provide 24VAC with a limited output current to the solenoid valves.
    1A is the maximum output current for Yardian Pro.
    If the solenoid valves can't be detected or turned on, please check the followings:

    1. Defect in the controller. This is very rare and if this do happen, we will send a replacement right away.

    2. Wiring issue or wires are not connected properly. This is the most common case.
        If this happens to a particular zone, you could swap the wires to the controller to identify the cause.
        You could then check the solenoid and wiring in that particular zone.
        If this happens to all zones, you might need to check the common wires.

    3. The Yardian Pro checks "over current" and also checks for "minimum current".
        If the wires or the solenoids are too old, the current drawn from the controller could be lower than
        the minimum threshold.

    Best Regards,
    Joseph

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  • Jeff Thompson

    I had my bad solenoid replaced and all zones are now scanned... I will say that this doesn't work every time, somtimes no solenoids found message and other times all 7 are found.

    If yardian detects over/under current situations, does it inform me somehow? When none are found, there's no indication why that's the case.

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  • Aeon Matrix

    Hi Jeff,

    We only send notifications when "over current" is detected because in this case, there must be something attached to this zone causing the issue. When it's under current, the result is already shown in the app (we list those are detected in the app and ask you to enable them). And when you don't have any zone enabled in the app, the app will ask you to scan again.

    Best Regards,
    Joseph

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  • Aeon Matrix

    To work with the Yardian Pro, a compatible system (including wiring, splice, and the solenoid coil) should have a resistance reading between 26 ohm (due to the 1A current limitation) ~ 200 ohm.

    Quotes from this article: https://igin.com/article-7493-A-myth-about-valve-circuits.html

    "If the reading is too low, the cause can be:

    • a damaged solenoid with a short inside.
    • two valve wires touching directly.
    • two valve wires touching through soil or water.

    If the reading is too high, the cause can be:

    • a corroded splice.
    • a splice where the wires are not making complete contact.
    • a partially broken wire, most likely inside its insulating jacket "

     

    This picture shows how a valve is connected to a zone on the controller.

    Simply use a multimeter to measure point 1 and point 2 in the picture with the wires removed from the terminals. You will know the overall resistance including the wiring, the wire splice, and the solenoid coil. 

     

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