Fibaro dimmers causing irritating sound

Devices
1

I have a number of Absinthe Prism wall lights (230v/5W). Some are behind Fibaro switches, some behind Fibaro dimmer 2.
The ones behind the switches work perfectly and silent.
The ones behind the dimmer 2’s make a very irritating sound at the lamps integrated trafo’s.
As I can’t seem to see whether auto calibration has set leading or trailing edge mode, I have tried to force them both. No effect.
I added a bypass to one, also no effect.
Any ideas? The sound is so irritating that I am thinking of ditching the dimmers.

2

Is there a way to see what values are set for for example load control mode (param 30)?
In the app and developer toolbox it seems parameters are only shown until param 29?

3

Looks like I am the only one with buzzing / humming LED lights in combination with the Fibaro dimmer 2’s.
Or the only one that is really bothered about it :slight_smile:

I have about

  • Kitchen: 10x GU10 7W in Dimmer2. Calibration succesful. Lights are Humming/buzzing at all dim levels causing really irritating noise. Lights are Interlight IL-C7GD36
  • Kitchen: 5x GU10 5W on Dimmer2: Calibration succesful. Lights are Humming/buzzing at all dim levels causing really irritating noise. Lights are Interlight IL-C7GD36
  • Living room: 4x GU5.3 spots via Delta LED driver on Dimmer 2. Cheapest Philips LED’s. No problem whatsoever.
  • Living room: 1x E27 dimmable LED 11W on Dimmer 2 - brand unknown. No problem.
  • Living room: 3x Absinthe Prism light with integrated 6W Led on Gallop driver, dimmable via trailing and leading edge. Humming / buzzing like crazy. Tried leading and trailing edge. Also with and without bypass. Tried a Fibaro Switch 2, no sounds. So it has something to do with dimming.

At first I thought I could live with the noises but it is driving me crazy. I am thinking of ditching all Dimmer-2’s but was hoping someone with same experiences had the golden tip…

4

Its most probably the light/bulb causing this issue. I have several Fibaro dimmers at home and also one qubino dimmer. I had this humming issue with both, Fibaro and Qubino dimmer with one specific dimmable GU10 leds. Once I chaged them (used Ikea dimmable GU10 400lm leds), this problem disappeared.

5

Thanks for replying. I just ordered replacements for the GU10’s, hope that does the trick.
The lamps with integrated (dimmable) led’s will remain a bit of an issue I think. Maybe Qubino’s new Mini dimmer can make a difference, but that one is not yet supported on Homey. Otherwise I will make them non-dimmable.