Client stated unit was not cooling. Verified customer concerns. Turned system on from thermostat, indoor unit kicked right on. Went out side to the condenser and it was not turning on. Found there was no power going to the service disconnect. Went to home panel and found breaker tripped. Reset breaker and system did not come on. Found the capacitor top mushroomed. Capacitor heavily burnt. Disconnected power from the unit. Tested capacitor, it is rated at 45/5 I did not get any reading out of the capacitor. Received permission from owner to go forth with repairs. Replaced capacitor and contactor. System turned right on and have a 18 degree temperature split. Also signed them up on a 2 system club membership to keep units running. Units are 2 American standards that are 15 years old. System is operating at this time.