Genuine Daikin 4010412 Scroll Compressor is the 2YC63FXD#A model, driven through its U/V/W windings by the outdoor inverter PCB so the unit varies capacity to match demand rather than cycling on and off, running behind an accumulator and a 4.0 MPa high-pressure cut-out that guard it against liquid floodback and over-pressure. When it fails the unit loses compression — refrigerant stops circulating and the system can no longer produce cooling or heating, often alongside an inverter overcurrent trip as the PCB tries to drive a seized or shorted motor. A failed compressor often takes its inverter PCB and contactor with it, so quoting those alongside a fresh accumulator covers the whole job in one visit — and the genuine Daikin scroll is matched to the inverter that drives it, where a pattern compressor can mis-pair and fault the board again.