I discovered the compressor is grounded out. I performed a acid test on system. The test results showed system has acid in it, this indicates the system has a leak and is Exhorting moisture into the refrigerant. The condenser coil is heavily restricted and corroded. The system is 19 years old and is pasted its life expectancy. I evaluated the entire system and also discovered the zoning has failed for the living area downstairs. Best recommended at this time would be upgrading the system to ensure proper working order and reliable cooling and heating.