Performed preventative maintenance for a unico air handler and a carrier condenser. Condenser model #24ABB348W310, serial #1713E04298. Upon arrival the thermostat was in the off position. I powered down the system at the air handler and removed the access panels. The evaporator coil’s are clean however a piece of the insulation fell on top of the evaporator coil. I was able to remove the insulation so I did not block the air flow. I tested the drain pan and drain line with several bottles of water to ensure that there are no leaks or clogs. I cleaned out the trap and inspected all electrical connections to ensure that they are secure and in good condition. The homeowner just replaced the 14x30x1 air filter located in the hallway return grill. The blower motor and blower wheel are both clean and in fair condition. I re attached the access panels and powered the system back up. I called for ac and observed the system starting normally. The condenser coils are dirty and in fair condition.