Connect the PWM header from the Lian Li fan controller to the D5 Next. Did you try setting the fans in the L-Connect software to PWM? Setting the fans to PWM should allow them to be controlled through the pwm cable? Does this allow aquasuite to control the fan speed ? It should work.
Not tried myself yet. I have canceled my uni fan SL120 order until I know if this will work.
I came to inquire about this as well, because I just set up this config today and the included PWM cable is not communicating between the D5 and the Lian Li controller. Like you, I was hoping to control all 5 of my fans based on water temp, but perhaps the single PWM wire is not enough? Does the D5 expect a ground and speed wire too?
Hoping someone can help!I