I recently discovered a little annoying problem with my Aquaro 5 LT. The fan speed seems to fluctuate a litte, as seen on the overview page here:
You can see it as small spikes on the TOP, REAR and FRONT fans as they decrease their speed in this picture. I tried to update the firmware to 1018, allthough I allready had that installed. I haven't had this problem before, and I suspect it has something to do with the controller settings. This behavior is very annoying to listen to, as the fans speed up-speed down-up-down and so on.
Both TOP fans are connected to connector #1 with a Y-cable, The REAR fan is connected to #2, and the FRONT fan is connected to #3. I have a PWM water pump on #4.
I use a set point controller for all fans reading a virtual sensor (Delta T=Difference between temperature in water out and air in).
Factor P=1000
Factor D=500
Hysteresis=0,1
Factor I=200
Reset Time (D)=4,0
Some of these settings have vastly different default values as previous firmwares, but I really don't know what they all do. Does anybody have any clue what causes this fan behavior. Could anybody help me on this? Any feedback appreciated!