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Thread: Caseta dimmer PRO with TuWire dimming ballast : when turned off, turns back on

  1. #1
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    Question Caseta dimmer PRO with TuWire dimming ballast : when turned off, turns back on

    I installed a Caseta In-Wall dimmer PRO PD-10NXD to replace an appropriate Diva dimmer for a
    Tu Wire ballast, 2 T8 4' fluorescent fixture. Previously worked like a charm.

    I very carefully reviewed the tech doc before going ahead, and it is listed as compatible, no neutral required.

    I works fine (adjusted with trims) except that when I push the "off" button it turn off but after 1-5 seconds will automatically turn back on, at a low level. I can recreate within the iOS app, when turned off, then adjusting to 1% it turns off, then back on, then adjusting to 2% it turn off again, then back on.

    It's been like that for a couple of weeks. I found the LUT-MLC used by the switches for low loads and wonder if it would work.

  2. #2
    Authorized Lutron Contributor
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    The LUT-MLC was never tested for use with a dimmer. It was only tested for use with the on/off switches, like the PD-5WS-DV.
    What is the model number of the ballast?

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  4. #3
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    Hi, It would be a 2W-T832-2, bought in end-2011.
    Another thing to know is that both the dimmer and fixture are installed in an older home with no bonding/grounding conductor, if it is of interest.

  5. #4
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    Sorry 2W-T832-120-2

  6. #5
    Authorized Lutron Contributor
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    On the PD-10NXD, did you connect the white neutral dimmer wire to a neutral bundle in the wallbox?
    The dimmer will work without a ground connection, but for any load other than an incandescent or halogen, the dimmer neutral needs to be connected.

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  8. #6
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    Well thank you.
    Is there an resolution if the wall box does not have a neutral in it ? I believe that only two wires come in the box. I might have a neutral in the ceiling box. The neutral is used to power the control circuit I imagine ?

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