Half turn type noise?
If you connected your reel, disconnect it, turn your flow right up and see if it kicks in properly after around 30secs...
(Air lock)
Failing that, try calibrating the controller
(Press & hold the two outer buttons on your controller until 'cal' shows, scroll all the way down to 'aut'. When a number flashes up, press the right of the 3 buttons)
(Pressuring your system)