Precision AC Tune up for Daikin 4 ton AC system. 19F temperature split. Filter ok. Cleaned drain at clean out. Indoor amps ok. Both coils are in good condition. Outdoor voltage/compressor amps ok. All electric motors and components ok. Refrigerant pressures/subcooling superheat ok. Verified thermostat operation/cycling of system. System is operating well at the time of this maintenance/tune up.