Genuine Daikin CAPAC15 Run Capacitor is the 15 µF run capacitor that provides the running phase shift for its single-phase motor so it holds speed under load. When it loses capacitance the motor struggles to start, runs slow, or stalls and trips. Because the capacitor costs little against the motor that relies on it, fitting the genuine 15 µF part is worthwhile — held to value where a generic that drifts low leaves the motor labouring every cycle.