What are the solutions for compressor overheating protection?

[Rachel]

The solutions for compressor overheating protection are: 1. Appropriately adjust the limit value of the high relay; 2. Check the remaining amount of refrigerant; 3. Use high-pressure nitrogen to flush the pipeline and clear the expansion valve blockage. The methods to determine the condition of the car compressor are: 1. Start the engine and maintain the speed at 1250 to 1500 rpm; 2. Connect the manifold pressure gauge to the air conditioning refrigeration system, turn on the AC switch, and set the fan to the maximum position; 3. Touch the intake and exhaust ports of the compressor. If the intake port is cool and the exhaust port is hot with a significant temperature difference between them, the compressor is in good condition; otherwise, it is damaged. The working principle of the car compressor: It draws refrigerant from the low-pressure area, compresses it, and sends it to the high-pressure area for cooling and condensation. The heat is dissipated into the air through the radiator, and the refrigerant changes from a gaseous state to a liquid state, resulting in increased pressure.