Just built this RJX CAOS 330 from hobbyking.
Had this working perfectly and went on first test flight. After 1st flight, connected battery again and got this annoying 2 beep error code every second or so on one if the ESC's.
Looked up the error and it says 'low input voltage' but as you can see, all the other motors spin up fine.
Tried to calibrate it on its own but just gives of the error tone constantly.
Anyone Help!
*****Update!!*******
Fixed the problem! Was a Low voltage problem after all, either bad solder or bad power board connection, re-soldered to new point on PCB and voilà, working fine again.
