Air Conditioning - A/c Condensor noise

I'm new here, I have a new house with a split a/c system. the heater and blower is in a room buy itself. the condensor is outside. The problem is the freon line goes in the house walls to the blower to the condensor area. there is a loud harmonic sound that comes through the wall from the outside condensor in the freon lines. What's the problem
Thanks Gary

Have the installer come back out and fix his mess, if he does not sue his butt. If this is really loud I would probably break out the ole video camera and get a set of videos just for my records, be sure to start recording before unit start up so the noise can be compared easily. The lines may be pushed tightly against another pipe, maybe a water line or something, or maybe they cross each other numerous times hard to say without being there, but it must be fairly loud or you would not be here telling your story. Good Luck