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Thread: Jandy RS-485 Wiring Conflicts

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    Join Date
    Jul 2014

    Jandy RS-485 Wiring Conflicts

    I have an RS12 with a secondary Power Panel. The Secondary Panel, Aquapure 1400, Indoor Controller, and Spa Link were all connected to a Jandy Multiplexer (with lightning board) and then connected to one of the 2 RS_485 4 pin connecters on the RS motherboard. Went to add an IQ900 iAqualink and use the other RS-485 connector. Now, while the Aquapure is functional, it will not appear on the iAqualink. If I disconnect the Spa Link, then the Aquapure appears. I have tried doubling up on the terminals and relocating the devices on the multiplexer to no solution. Jandy, as usual, will not speak to homeowners about such things. What is the wiring conflict and any solutions?

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: Jandy RS-485 Wiring Conflicts

    Assuming that the second RS-485 connector is just a drop on the network. It sounds like you either have conflicting addresses or you're exceeding the maximum number of devices on the network that Jandy allows. What happens if you drop one of the other devices off the network?
    Dave J. TFP Moderator
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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Jandy RS-485 Wiring Conflicts

    There are some obvious things that are still worth double checking. You need to be careful not to cause any shorts when connecting up multiple devices. It is also important to get the correct wire to the correct terminal. These are so obvious that they often go without saying, but that are fairly easy mistakes to make, so worth an extra check.
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    malcolmb5325's Avatar
    Join Date
    Sep 2009
    Sydney, Australia

    Re: Jandy RS-485 Wiring Conflicts

    have you gone into the "help" menu then into "Diagnostics" then "Remotes" to see what is showing connected.
    16,000lts Fibreglass, Magna Mineral Pool Water
    Jandy CV340 Cartridge filter, Zodiac TRi SWC, Z4 iAqualink, Jandy Laminar Jets, Solar Heating, Spa Jets with Jandy 1.5hp Epump operating everything.

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    Re: Jandy RS-485 Wiring Conflicts

    Did you figure this out? I periodically get this issue, then it goes away

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