Switches not working & no indicator led.

Discussion in 'C-Bus Wired Hardware' started by Bauerco, Jan 14, 2023.

  1. Bauerco

    Bauerco

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    Hi, i have a c-bus system running 4 cbus2, modules, 1 12 channel relay & 3 dimmer relays with a total of 16 channels.
    All of a sudden the switches stopped working & have no indicator light on them. The lights are all on & the relay modules are all lite up as well but the lights will not turn off pressing the relay buttons, only way to turn of the lights is to turn off the breaker. The unit indicator light on the modules is on but the CBus indicator light is off.
    Can the system be reset or something similar to reboot the switches or does it need something else?
    Any help would be appreciated
     
    Bauerco, Jan 14, 2023
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  2. Bauerco

    DarylMc

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    Image 14-1-2023 at 8.03 pm.jpeg
     
    DarylMc, Jan 14, 2023
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  3. Bauerco

    DarylMc

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    Are all the CBus Indicator LED's out?
    Have you had someone in the ceiling space or work done at the time?
    Heavy rain?
     
    DarylMc, Jan 14, 2023
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  4. Bauerco

    DarylMc

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    Is every channel of every output unit on?
    If so the remote override may have been operated.
    Potentially by wiring damage or liquids.
     
    DarylMc, Jan 14, 2023
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  5. Bauerco

    DarylMc

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    Image 14-1-2023 at 8.19 pm.jpeg
     
    DarylMc, Jan 14, 2023
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  6. Bauerco

    DarylMc

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    Also check all circuit breakers are on.
    CBus output units with built in power supplies will usually be wired with one circuit supplying the lights and another powering the CBus units.
     
    DarylMc, Jan 14, 2023
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  7. Bauerco

    Bauerco

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    Thanks for all the replys DarylMc We had a bit of a water leak from th A/C drain tray which i fixed. The lights went out not longer after that so it’s possible some water may have gotten to a switch, all the breakers are on. We dont have any touch screens or similar only a pc interface module & homegate usb dongle. I use to have a program on a laptop that packed it in years ago but never used it or the dongle. Is there anyway to load up a bus program & log in to reset the system or do i need to get someone out?

    Cheers
     
    Bauerco, Jan 20, 2023
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  8. Bauerco

    Ashley

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    Cbus cables contains 4 pairs (8 wires). 2 pairs are in parallel and are the main cbus communications path. The remaining 2 pairs are the remote on and off pairs. A switch across theses pairs can turn all the lights either on of off. These pairs are never used in domestic installs but are generally connected to all units anyway. It doesn't need much leakage between these pairs to trigger an all on or all off conditions, and this will override everything else. Water anywhere on the cable can easily trigger this, and that could be your problem.

    If you are confident, try unplugging the pink cables from the relay or dimmer unit. If you can then control the lights from the buttons on the unit that will confirm a remote override issue. You then just need to track down where it is occurring.
     
    Ashley, Jan 21, 2023
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