In Scottsdale, near East Shea Boulevard and North 52nd Street performing Fall preventative maintenance on a Carrier condenser. Upon arrival, cycled unit into heating and cooling mode. Replaced intake filter. Took temperature readings from supply and return. At unit, cleaned and tightened electrical connections. Took volts and amp draws from components. Checked Freon levels with super heat and subcoool. Checked start and run capacitors. Upon departure, unit is working properly and within manufacturer specifications.