ActronAir EMI Filter Board R410A is the factory-fitted emi filter board r410a for ActronAir split ducted systems, managing ECM fan motor speed control, zone switching outputs, and wall controller communication. A failed board causes complete loss of system operation and fault code display -- fit the 100% Genuine ActronAir 4080-013 to restore factory system performance. Isolate power at mains before replacement -- live work on electrical components is dangerous and must only be performed by a qualified technician.