ActronAir CM100 Commercial Outdoor Control Board is the factory supplied and fitted outdoor control board for Hercules variable capacity commercial systems, providing PI compressor algorithm control, adaptive demand defrost, and Building Management System compatibility via MODBUS, BACNet 485 and BACNet TCP/IP. A failed CM100 board causes complete loss of system control and compressor management on the Hercules series — fit the 100% Genuine ActronAir 2020-136HS to restore factory system performance. This component is factory supplied and fitted — confirm application suitability with our team before ordering.