Cooling safety inspection and maintenance. Tuned the thermostat to cooling then dropped the temperature to 50f, inspected the indoor system, pulled out the filter and inspected the duct system, flushed the condensation drain line and turned off the humidifier. Inspected the blower assembly and the evaporator coil. Checked the refrigerant pressures and added 3 lbs of R 410a refrigerant, leveled the outdoor system then cycled. Job complete.