an indoor unit that contains the evaporator and blower and an outdoor unit that houses the compressor and condenser. I started by checking the electrical connections and ensuring that the power supply was properly connected to the indoor and outdoor units. I then checked the refrigerant levels and charged the system if necessary. I also visually inspected the system for any signs of wear and tear or damage. Finally, I tested the operation of the system to ensure that it was working properly and efficiently.
