Arrived on site to inspect a new unit install that is making a lot of noise. Client stated unit was just installed and dose cool but once unit shut off a loud noise is being made. Arrived and spoke to client had him cycled unit and unit dose coil ran for a couple minutes had him shut off system replacement nice unit would shut off and condenser created a loud squalling noise that is louder then normal. Unit is operational but advised there may be a issues in the compressor or the cycled of refrigerant. Advised would have warranty come out and confirmed as there is no imminent repair that can be made. Advised client and he is aware and okay with soo and he. Unit is operational upon departure.