Shelly 1L (no neutral) with lamp led

    Hi,

    I installed the Shelly 1L to control a LED lamp (6 x 3W Philips LEDs = 18W) without neutral wire on the switch, with a Bypass following the diagram I found in the user guide. I first installed the bypass on the lamp, tested it without the Shelly 1L just to see if I didn't screw up with the connections, and then I installed the Shelly 1L on the wall switch (the line to the L terminal, the ceiling wire to the O terminal, and the switch to Sw1 & Sx). The Shelly 1L didn't worked at all (no discoverable with the phone, red light off, wall switch not working).

    I would share an installation diagram but it's basically the same than the first figure of https://shelly.cloud/documents/user_guide/shelly_1l.pdf The only difference is I only have one switch connected to SW1 and Sx.

    I did some more testing before giving up:

    1. I replaced the Shelly 1L with another one I had: it didn't work
    2. I replaced the bypass: it didn't work
    3. I replaced one of the LEDs (the other 5 LEDs were still connected) with an old 40W light bulb: the Shelly 1L started to work and I managed to connect it to my Wifi and control the light (with the app and with the wall switch)
      1. I then removed the 40W light bulb and it worked during a while: after ~5 minutes, the leds began to flicker, the Shelly 1L disconnected form my network and nothing worked
    4. To test the Bypass I removed all the leds from my lamps: the Shelly 1L worked perfectly so I suppose the bypass is working.
      1. I then added the LEDs to the lamp, and as before it worked during ~5 minutes

    I found several messages in this forum with the more or less the same problem, but as stated in the user guide, the Shelly 1L should work with "Non dimmable led" (Philips in my case) so I suppose I did something wrong.

    Any clue of what is happening?

    Thanks

    Welcome to the forum, Vicente!

    To your issue: According your diligent description of the troubleshooting, I would conclude it is the LED lamps. Obviously, the Philips lamps are interfering the correct function of the Shelly and Bypass pair. The only hint I could give would be to replace the lamps with another brand. Adding a neutral wire to the arrangement would be a laborious job, I suppose?

    „Habt Geduld. Alle Dinge sind schwierig, bevor sie einfach werden!“ (aus Frankreich)

    „Nothing in life is to be feared, it is only to be understood.“ (Marie Curie, 1867-1934)

    „Es reicht nicht“, rief Schiller, „Gedankenfreiheit zu fordern, man muß auch denken können, sonst fordert man Gedankenlosigkeitsfreiheit und die ist die Freiheit zur Dummheit, welche wiederum die schlimmste Unfreiheit überhaupt ist!“
    (Aus „Besuch aus Weimar“ von Gert Heidenreich, Schriftsteller, *1944 in Eberswalde)

    Thank you for your quick response.

    Changing the lamps are not an option (at least until they start to fail) and even in this case, I don't know which brand to buy.

    I suppose I will install it in the electric distribution box (not sure if it is called like that) of the room: the neutral, line and switch cables are already there. I didn't want to do it the first time because it's messy, full of cables from wall sockets, other switches... and now, after my problem of the first post, I'm not sure it will work.

    Thanks