I have the same problem, that is no light.
I did not find any way to swich on the led in AS2012beta, but I am sure it will arrive in a future verion.
I have also not bothered to go throug all the seettings direktly on my A5 directly, but I am sure it is there somewhere ... that is I have managed to get a constant red light with preset value1, but that is about it.
drbo

RGB not available in Aquasuite yet but you can edit the RGB controller directly on the unit.
I have mine setup to replace the case power led and set to glow green for low temp, blue for operational temp, red for overheat. I have flash red alarm setup as well.
Heres my example
I set up a virtual temp sensor with 2 sensors and also to detect max value for both CPU water and GPU water loops.
Then set the RGB controller

>controller>RGB LED controller>data source - set your preferred data source. in my case the virtual sensor so that either water loop will trigger max temp changes to the LED.
and also set
>controller>RGB LED controller>low / optimal / high (set each of these with your desired temps my case 22c, 32c and 40c)
There are endless possibilities for how to use the RGB depending on your system and the sensors you have installed.
The LED is VERY bright so I have each of the temperature states (low/optimal/high) set to 50% intensity for each of the 3 temperature points.
Obviously I only have 1 LED colour active for each temperature point, the others are set to 0.

Quoted from "Phatboy69"

Then set the RGB controller

>controller>RGB LED controller>data source - set your preferred data source. in my case the virtual sensor so that either water loop will trigger max temp changes to the LED.
and also set
>controller>RGB LED controller>low / optimal / high (set each of these with your desired temps my case 22c, 32c and 40c)
There are endless possibilities for how to use the RGB depending on your system and the sensors you have installed.
The LED is VERY bright so I have each of the temperature states (low/optimal/high) set to 50% intensity for each of the 3 temperature points.
Obviously I only have 1 LED colour active for each temperature point, the others are set to 0.

I have already tried this without success. Even, I have tried with all settings in "controller->RGB LED controller" and still didn't work (no light)

Please, how many people have managed to make this work?

In my opinion there is something wrong with the controller...

I can comizorate with you have the same issue also tried everything

Try this

First you have to decide what sensor you want to trigger a state change.
In my case I chose a virtual temp sensor I setup with maximum values for CPU/GPU water loops.
>Controller>RGB LED Controller>Data Source>Virtual Temp Sensor 1

and then also set the temperatures that you want each LED to be triggered for and the intensity for each colour LED

>Controller>RGB LED Controller>low / optimal / high (set each of these with your desired temps my case 22c, 32c and 40c and the corresponding LED intensity)

then assign the controller to the RGB Output

>Output>LED Settings>controller>RGB LED Controller>red/green/blue>Data Source>RGB LED Controller - do this for each colour

Tadah now LED will change colour based on the three temperature ranges you set. You can also set a preference in the last settings page for the LED to flash for an alarm event!

I have my RGB LED replacing the front case power LED so I can see at a glance if everything is cool or not!

Thanks phatboy69 all good now