Check whether you have the right wire to the right terminal, you may have them crossed.
The pump is very loud, to my ear, do you ever hear it rotating? The menu should show a "P" when it calls for the pump to do its thing, do you see this? Does the spindle rotate shortly thereafter? How many times does the spindle rotate?
I have the RH set to 70% but it normally stays at 40% since lockdown unless I add water myself.
The wires are correct because I actually set up my incubator first and then added the pump later. Only two portals on mine and the pump is the smaller of the two.
I agree, the pump is loud. Mine doesn't show a "p" but it uses the asterisk to signify use the pump? I see the spindle move as if to rotate but it won't actually rotate unless I take off the tubing. When the tubing is on it'll make sounds like it's moving, but it's not?