Genuine Daikin 657343 Capacitor is the 75 µF, 180 V AC motor capacitor that delivers the starting and running phase shift for the motor it serves in the unit. When it loses capacitance that motor starts weakly, runs slow, or stalls and trips on overload. Because a capacitor of this value is a low-cost part against the motor that depends on it, fitting the genuine 75 µF/180 V unit is worthwhile — rated exactly where a generic substitute may sit off-value and shorten the motor's life.