3 Phase 4 Ton Outdoor Electric Wiring without Lockout Relay All Connections, Compressor, Fan Motor, 3 Phase Magnetic Contactor and Compressor Heater . you can see all wiring with clear Diagram. easily learn by this outdoor wiring Diagram.  Diagram You should read it : Split AC Outdoor wiring Diagram Haier Indoor PCB Wiring Diagram Kenwood