Shelly dimmer 2 complete LOCK up.

gibman

Hi..

Currently running around 12 x shelly dimmer 2 devices in my house.

Yesterday I installed yet another device which are powering 4 ikea dimmable bulbs.

I flashed to the latest 1.9.4 FW

To my surprise the shelly device suddenly completely locks up.

I cant turn light on/off using the physical wall switch. Nor can I adjust brightness levels.

The web interface does not respond.

The small RED led indication light on the unit itself is off.

(Normally its always on - atleast this is the case when looking at my other working devices.)

The device temperature feels normal when touching the chassis. Its not dead cold.

I tried hard resetting the device with AC line still connected. Pushing the reset button. Nothing happens.

The only thing that works is if I disconnect the AC line. eg. by turning the breaker off.

Then turning the breaker on again.

Essentially power cycling the unit.

Sometimes this makes the unit work again.. Sometimes not.

Often I have to repeat this process a few times.

Once it works.. it will work for about an hour or so. Then it ceases completely.

What can I do to fix this ?

I have a few other shellies that are waiting to be installed. I could try and swap this one out.

I could try and revert to earlier FW version.

Infact I remember I had this issue before on one of my other shelly dimmer 2 installations.

It was exactly the same deal. No red LED indication lights. No access to it. Couldn't turn on lights with physical button and so on.

I remember I removed all the wires and placed it on my test table where I connected AC + Neutral only. No consumer (lights), no switch.

The LED indication began emitting red light. It connected to AP and I was able to confirm it was working.

Back to the old installation again. Wired exactly the same. Haven't had any issues since then.

Back to the current problematic device. This one seems a lot more stubborn.

To me it sounds like a bad unit.

Anyone out there experienced anything like this ?

setup:

NEUTRAL line connected.

using "one button mode" + calibrated trailing edge dimming mode.

archi

hello I have mounted a shelly dimmer 2 with a similar problem, it only worked for a few minutes, then it turned off.
I opened a ticket to shelly and after several tests they made me a replacement.
I received a new unit and it also had a problem, it did not turn off the light, it was always on.
It has also been replaced, on this occasion I will ask for another model.

Misty#Forest#19143

This pretty awkward, same issue no red status light on initial connection, reset a few times got it into AP mode and working then 15min later light went off, fell off the network, completely dead cannot reset it to get to AP mode and still no status light, (bought 3 units) second one I connected and red status light was on immediately and 15hours later still working.

I will try the support ticket route

Update:

So I took it out of the case and it started to work 100%, LED was on etc. I have since drilled the place where the reset button was as I think it was partially pressing (when I pressed in before still made a click) down the reset button.

Shelly dimmer 2 complete LOCK up.

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