Upon inspection could not find issue or noise with system. Based on customer description of issue it is very likely the system went into defrost and stopped condenser fan motor and kept compressor running to defrost coils. Informed customer of defrost mode operations. Tested system operations and everything is working well at this time. System is 6 years old and is working well. Upon further inspection found capacitor for condenser fan motor is starting to weaken and recommended replacement. Gave estimate for repair and approved on site.