Universal dimmer issues

Discussion in 'C-Bus Wired Hardware' started by MadDude, May 6, 2020.

  1. MadDude

    MadDude

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    Hello everyone,

    I have a small setup of two 4 channel universal dimmers (DIMDU4) and two 12 channel relay modules.
    I have also a RS232 gateway with a RPI running c-gate and homebridge without any issues.

    The problem I have faced is dimmer related.
    Dimmers are controlling IKEA LED lamps (which have excellent CRI btw) in Trailing Edge mode and one of the dimmers is behaving very strangely. Every once in a while when I switch on the light it doesn't instantly turn on as expected, but rather flickers very fast and after a few seconds pause it turns on at full power. After that I can turn off-on multiple times and everything works smoothly, so this happens when I am switching on the lights like a "cold start".

    Any ideas on what could be causing the issue or at least where should I start dig into?
     
    MadDude, May 6, 2020
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  2. MadDude

    Ashley

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    Delayed/flickering start up of led fixtures is generally caused by the led driver and not the dimmer. Simplest test is to swap the leds on 2 channels and see if the problem stays on the same led.
     
    Ashley, May 6, 2020
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  3. MadDude

    MadDude

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    Thank you for your reply.

    So if I have 5-6 GX53 LED lamps per channel from your words do I understand correctly that one of the lamps could be faulty or it is general incompatibility?

    On the second dimmer I have a group (channel) with 2x of same GX53 LED lamps and everything works absolutely smoothly.
     
    Last edited: May 7, 2020
    MadDude, May 7, 2020
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  4. MadDude

    Ashley

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    Does just one of the leds on the channel flicker, or all of them?
     
    Ashley, May 7, 2020
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  5. MadDude

    MadDude

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    All of them on a channel.
     
    MadDude, May 7, 2020
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  6. MadDude

    Matt

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    Tried a 31LCDA? Clipsals load correction device might help.
     
    Matt, May 30, 2020
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