Air Compressor 3 Kinds of Common Faults and Solutions
Jan 10, 2025
Will you encounter a lot of failures in the process of using industrial air compressors, and want to solve them yourself but have no way to start? Let’s take a look at the 9 common faults and solutions of industrial compressors.

1. The air compressor suddenly stops during operation
The reasons are:
(1) The suction pressure is too low, lower than the low pressure lower limit of the pressure relay;
(2) The exhaust pressure is too high, causing the high-voltage relay to operate and power off;
(3) Oil pressure is too low, oil pressure relay action relay;
(4)air compressor air end motor overload, thermal relay action relay;
Elimination method:
(1) Check the reasons, belong to the pipeline blockage to unblock the pipeline, such as the system refrigerant is insufficient to supplement;
(2) Check the cooling capacity of the condenser or cooling air volume;
(3) Check the pipelines and oil pumps of the oil transmission system;
(4) Check whether the power supply voltage is low or the cooling load is too large;
2. The exhaust gas is compressed excessively
The reasons are:
(1) The cooling water of the water-cooled condenser is insufficient or the cooling air of the air-cooled condenser is insufficient;
(2) The scale on the surface of the condenser tube cluster is too thick or the oil is too thick, causing heat dissipation difficulties;
(3) There is air in the refrigeration system;
(4) Excessive refrigerant injection;
(5) The valve in the exhaust pipe fails, resulting in too high pressure;
Elimination method:
(1) Check whether the valve is fully open, increase the water supply or check whether the motor voltage, speed, and transmission belt are too loose;
(2) Clean the scale, scrub the oil, so that the surface of the condenser tube cluster is clean;
(3) Let off the air;
(4) Discharge excess refrigerant;
(5) Check and correct the valve;
3. Cause the wet stroke of the air compressor
The reasons are:
(1) Thermal expansion valve failure, open too large;
(2) The solenoid valve fails, and a large amount of refrigerant enters the evaporation tube after shutdown, and enters the air compressor when starting again;
(3) Excessive perfusion refrigeration dose of the system;
(4) The thermal expansion valve temperature sensing bag is loose and not tied, resulting in an increase in the opening degree of the thermal expansion valve;
Elimination method:
(1) Close the liquid supply valve and overhaul the thermal expansion valve;
(2) Repair the solenoid valve;
(3) Release excess refrigerant;
(4) Check the bundling of the temperature sensing bag;