Genuine Daikin 2324757 Scroll Compressor is the scroll compressor at the centre of the outdoor unit, generating the pressure difference that moves refrigerant through the cooling and heating cycle. When it fails the unit loses compression and can no longer produce heating or cooling, typically stalling against its overload. The electrical parts that start and protect it seldom escape a compressor failure, so they belong in the same order — and buying the compressor genuine keeps you to a true Daikin replacement rather than a best-match substitute that may behave differently in the circuit.