The AK-PC 772A units are advanced regulating systems designed for precise capacity control of compressors and gas coolers in small CO2 refrigeration systems. These units can function either as a compressor and condenser control on Medium Temperature (MT) systems or as a booster system, and they support regulation with one parallel compressor. The controller includes sophisticated oil management, a heat recovery function, and CO2 gas pressure control to ensure optimal performance and energy efficiency.The primary function of the controller is to manage compressors and gas coolers, ensuring that the system operates at energy-optimum pressure conditions at all times. This is achieved by controlling both suction pressure and gas pressure through signals from pressure transmitters and temperature sensors.