It may be caused by turning on the air conditioner for a long time under the condition of insufficient freon; It may be that the air in the system was not exhausted during installation, which increased the load of the compressor; It may be that the power supply is not turned on or off, the power cord socket is in poor contact, or the power cord is thin or aging. 1, the failure of Gree air-conditioning compressor may be due to insufficient supply of freon, which may lead to refrigerant leakage during installation. 2. When installing the air-conditioning compressor, the air in the air-conditioning system is not completely exhausted, which will lead to pipeline blockage during the air-conditioning operation, thus further damaging the compressor, so Gree's air-conditioning compressor will not start. 3. Poor power contact of Gree air conditioner leads to intermittent operation, which leads to the aging of the continuous switch or power supply circuit of Gree air conditioner compressor, and the aging circuit can not reach the working voltage of Gree air conditioner during voltage transmission. If the voltage is too low, the working load of the compressor will increase, which may lead to compressor failure. 4. The function locking protection device of Gree air conditioner compressor has been started. Gree's air-conditioning models basically have the function of function lock, and Gree's air-conditioning can't be started if it is in the function lock mode. If you are in lock mode, you can't do anything, please refer to the user manual to remove it. The compressor works at high temperature for a long time, which leads to lower insulation, lower coil resistance, higher starting current and instantaneous compressor temperature. Therefore, Gree air conditioner compressor will not start.