If you notice your AC system making loud or strange noises, this indicates there is a problem. Split air conditioners should not be making much of any noise other than an electrical humming, which is a standard sound from many appliances that you may not even notice. \
A noise can be caused by loose parts inside the air conditioner or even broken or damaged parts in the unit. If you hear a strange or loud noise from the AC, consult with a professional to have the system checked. \