Received a call that the second floor cooling was not operating, upon arrival I was informed that we had disconnected the cooling wire in winter because the heat and air conditioning was running at the same time. No more to reinstalled the cooling wire at the thermostat but there was still no cooling. My cycle the system and confirmed that the blower motor came on but found that the condenser is not operating, I checked voltage and found that I was getting a voltage drop and only getting 15 volts to my condenser instead of 24 volts. I bypass the thermostat and went out to the condenser, found out the condenser was not operated. I confirm that I had high voltage going into the contactor and out of the contractor, the capacitor has failed. Installed a new capacitor installing the system and confirm that the connector is now coming on and operating.