AK-PC 351 is used for capacity control of compressors and condensers in small sized refrigeration systems and covers applications with one suction group and a condenser. AK-PC 351 can control up to 4 compressors and supports a variety of compressor combinations including variable speed and Digital scroll. Condenser fans can be controlled in step (max 4) or via speed control. AK-PC 351 can be fully configured through the built in display. Dedicated wiring and auto configuration of in- and outputs make it easy to setup the controller.