Original Daikin VRV IV Side Discharge 12 HP Outdoor Inverter Drive PCB Board compatible with Daikin VRV outdoor units. Part numbers include PC1135-1(B), V491SVHS, YPHT31764-1C, ETC731372, ETC731372-S6671, Q21371-149-016, and 021371-149-033. Designed for compressor inverter drive control, ensuring stable and efficient VRV outdoor unit operation