Open the fuse relay box in the engi

Open the fuse relay box in the engine compartment and locate the air conditioning compressor relay. With the hand to induction relay, there is an obvious vibration sense, pull out the relay, the engine speed decreased significantly, after repeated power test, found that the relay is working normally. The compressor relay works normally, but the compressor cannot work normally, it can be judged as the compressor fault. Remove the air conditioning compressor from the vehicle. At the same time, the trace of leaking refrigerant was observed on the back cover of the compressor. Then decomposes the compressor according to the relevant requirements. Through observation, no piston assembly, compression assembly and rotor assembly were found to be stuck. Check solenoid valve N280. Solenoid valve N280 is installed at the back end of the compressor and leakage is found at the apron connecting the solenoid valve. Will remove the solenoid valve in the plug have any response, can not hear any work sound, measuring the solenoid valve winding resistance is infinite, indicating the solenoid valve N280 circuit damage.