2026-04-10Views：
Air compressor always low voltage shutdown, there are a variety of possible reasons, the following are some common troubleshooting points and solutions:
poor contact of power cord:
the power cord may be open or loose, resulting in unstable voltage. The power cord should be checked and re-secured to ensure good contact.
Supply voltage too low:
the normal working voltage range of the air compressor is usually between 380V and 420V. If the power supply voltage is too low, it will cause the motor to fail to start normally, and then the air compressor will enter the protection state and stop. At this time, check the voltage of the power supply grid and take measures to stabilize the voltage, such as using voltage stabilizing equipment.
Loose power lines or terminals:
after prolonged use, the power lines or terminals may be loose. These connection points should be checked and tightened regularly to prevent voltage fluctuations.
Equipment aging or wear:
after the air compressor has a long service life or long-term high-intensity operation, the motor and other components may be aged or worn, resulting in unstable voltage. In this case, consideration should be given to replacing the motor or the whole machine.
Grid overload:
during the peak period of power consumption, the load of the power grid may be heavy, resulting in large voltage fluctuations in the area where the air compressor is located. At this time, you can consider adding voltage stabilizing equipment or reducing unnecessary electrical equipment to reduce the grid load.
thermal protection shrapnel poor contact:
the thermal protection shrapnel inside the air compressor may not work normally due to poor contact, causing the air compressor to stop immediately after starting. The installation of thermal protection shrapnel shall be checked and good contact shall be ensured.
In order to solve the problem of frequent shutdown of the air compressor due to low voltage, the following measures can be taken:
regularly check and maintain the air compressor and power supply lines to ensure that the power cord and wiring terminals are fastened and in good contact.
Pay attention to the change of power grid voltage during the peak period of power consumption, and increase voltage stabilizing equipment to stabilize the power supply voltage when necessary.
For aging equipment or parts, timely replacement to ensure the normal operation of the air compressor.
Reduce unnecessary electrical equipment in the air compressor room to reduce grid load.
Through the implementation of the above measures, the shutdown of the air compressor due to low voltage can be effectively reduced, and the operation stability and production efficiency of the equipment can be improved.
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