Upon arrival found 2 screws for evaporator coil door not secured and disconnect flipped to the “off†position. Secured evaporator coil door and flipped disconnect to the “on†position. Performed thorough evaluation of the system and found refrigerant charge low. Charged system with 1lb of R410A to get it up to manufacturer specs. Performed complimentary electronic leak search, no leaks detected. The system is operating properly at this time.