Installed 3 wifi thermostats controls. Checked the wine unit and found it low on refrigerant. Leak checked the condenser and evaporator areas. Did not find a leak at this time. The leak may be in the line set. Added a stop leak additive, charged the system with R134A refrigerant. Adjusted the control valve to maintain the correct suction pressure and set the thermostat to 55 deg. Left the unit cooling to full capacity.