Condo association vs owner. Who pays for leaking air conditioner?

Following a pressure test it was determined that my air conditioning unit lines are leaking. These lines are under the condo. I'm told the lines will now be located up the side of the building above my neighbors ceiling and through their closet. Then the lines will continue through down my ceiling closet to the air conditioning unit. Who is responsible regarding cost to run AC lines up the side of the building and inside the structure?