Thermostat on rtu 1 was blank. Checked low voltage and high voltage. Disconnect wasn't getting power. Turned disconnect off. Checked breaker panel in stockroom. Breaker was in the tripped position. Reset breaker in panel. Checked power to disconnect. Disconnect was getting voltage. Checked for bare wires and ohmed out compressors. Reset power to unit and breaker immediately tripped. Disconnected first stage compressor and Reset unit. Blower came up, And one condensing fan motor came up. First stage compressor is bad ( causing breaker to trip). Checked non working condensing fan motor. Found condensing fan motor is bad. Disconnected fan motor. Jumpered 2nd stage cooling. Second stage circuit is completely flat on r22 (empty) and first stage circuit does have pressure but can't run system to check if low. First stage pressure switches have a break in wire causing compressor contactor to pull in and out. Blower belt is extremely loose and needs to be adjusted or replaced. Sheave on blow