On arrival Client on commercial building stated the 3rd ac was not cooling properly. I access roof top package unit and discovered the unit was iced up solid. We will have to return to perform a leak search to determine where the leak is inside the package unit. Ones located we will have to repair the leak and recharge the system with refrigerant. I installed new ECM blower motor and blower surge protector. I tested operations and system is working properly at this time.