Tech arrived on site. Found downstairs ac to be down. Testing indicated the secondary motor controller had failed. Installed testing motor controller. Measured amps on motors. Found start up amps to be high on compressor. Found running amps on fan motor close to max. Oil stains on fan motor. Found refrigerant leak on a service valve. Refrigerant charge is off. Low super heat and high sub cooling. Due to age of system and issues, recommend budgeting for replacement soon before it fails. Have provided quotes for fixing all issues. Installed new motor controller and installed new wire connectors as well. Unit is operational upon departure.