Fibaro Dimmer 2 limitation

[Guest Roman]

We have several projects.

And only 2-wire connection available for all light sources. So we decided to use Fibaro Dimmer 2 configured as Switch.

 

We stucked with several interesting problems:

1) We have 400Watt light sources. Halogen lamps.

Is there any amplifiers which able to connect to Fibaro Dimmer 2 in order increase power?

Is it really possible with 2 wire connection?

 

2) We have vacuum fans (30 Watt).

We aren't able to control motors with Fibaro Dimmer 2. I guess consumption is very big on start, and dimmer turns off.

 

 

[TRicky 84]

Hi Roman,

 

Question 1: I don't think so

Question 2: Minimum load is 50 Watt so 30W is too little. The Bypass-2 will solve that problem.

 

Cheers

[alex88 71]

2) I am interested that people say the bypass will fix the issue with low wattage circuits. I still have 5 brand new bypass modules sitting in my cupboard as when I tried connecting them to sort out low wattage circuits they made no difference. 

 

Interestingly and I am sorry this does not help, but upgrading from dimmer 1 to dimmer 2 actually resolved this issue. I now have single Philips Dimtones (8 watt from memory) working just fine. 

 

Is there a reason you are using dimmers on the fans, rather than relays? 

[Guest Roman]

Thank you for help!

> Is there a reason you are using dimmers on the fans, rather than relays? 

Yes, we have 2 wire connection everywhere in this house. So only dimmers could be connected.

 

Do you have ideas why when I connect 5 Osram LED lamps to dimmer it turns off when I set 80..100%. It works correctly when I set 0..79%.

What exactly means error: Voltage Drop/Drift. Reduce the maximum brightness level?

Could you explain?

[m.roszak 765]

If you are willing to check device manual, there is simple explanation about this error and clear solution to your case...

Quick answer -> Lower value of parameter 2.

Another solution -> connect a bypass and calibrate the device again (by setting parameter 13 to 2). 5 OSRAM LEDs probably do not meet minimal power requirements for using them without a bypass in 2 wire connection.  




 

[TRicky 84]

Yup, a new calibration makes a big difference.

And afterwards you always can change the levels manually if needed.

 

And I have no experience with the Dimmer 1 combined with the Bypass 1

but the Dimmer 2 and Bypass 2 works fine with low loads like led bulbs

[vsokolov 6]

According to my observation Dimmer2 behaves very unpredictable at the slightest changes in the AC-network parameters while connected in 2-wire connection mode.
Even with a bypass-2.

IMHO more robust solution - to use Relay Switch near controlled device + wall remote controller.