The LG EBR78509901 Air Conditioner Inverter PCB Assembly is a replacement electronic control board that regulates the operation of compatible air conditioning systems. It manages communication between the inverter compressor, fan motor, and other electrical components by processing operating signals and adjusting system functions based on cooling requirements. Installed inside the con... https://www.hnkparts.com/lg-ebr78509901-air-conditioner-inverter-pcb-assembly