At beginning the A/C system was noisy. I am unable to sleep even with ear plug on, after talking with front desk, an oriental woman, she went to the room and tried to help to turn off the system to get rid of the noise. Actually it seems there are central air systems running even after turn down the system switch on wall. Finally it’s quiet and cool. Thanks the woman, although it is not her duty, maintenance problem, but she was so nice and solved our problem.