Lights lit, the AC has entered the circuit. Compressor does not start more than a PTC starter damage caused. Open the door, check the thermostat knob is correctly placed cooling block (4 block), but the compressor does not start. First, unplug the power cord, removed the compressor junction box housing, were measured with a multimeter overload, compressor start winding (CS) and run windings (CM) were normal, and then measure the PTC starter at both ends of the resistance is infinite, normal resistance should be 22Ω, then insulated conductors shorted power supply schematic (see photo below) in the ab-side about 1 ~ 2s, compressor immediately start running, which determine the PTC starter damage. The starter model 330M320 (Nissan), the domestic market difficult to see, try homemade 220ΩPTC starter substitution (by: best match starter substitution with startup characteristics), power, compressor normal startup, troubleshooting.8Edservice manual download site