|Check and adjust damper.
Check the frame of unit with ohmmeter for proper electric ground.
Lubricate motor and fan bearings
Start unit and observe operation.
Carry out the cleaning of covers (if any).
Remove dirt or dust from all interior parts.
Carry out the cleaning of condenser, cooling coil fins and fans..
Check the refrigerant leaks
Check temperature differential and controls.
Carryout cleaning of the filter.