In - depth Analysis of Air Compressor Abnormal Shutdown Causes and Solutions
Time:2025-08-08
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In the daily use of air compressors, the problem of abnormal shutdown will affect production efficiency. The following is a detailed analysis of common shutdown causes and solutions:
- Thermal Relay Tripping
- Cause: When the motor current is seriously over - loaded, the thermal relay will heat up, burn out and short - circuit, disconnecting the control circuit to achieve overload protection.
- Solution: Select a thermal relay with appropriate specifications; clean and replace the faulty relay; change the motor starting method to reduce the number of starts; fasten the terminal connections and check the main wiring.
- Unloading Valve Failure
- Cause: As a key valve part for matching air consumption and controlling the air intake of the air compressor, if it fails, it will cause abnormal shutdown.
- Solution: For faults caused by dirt and jamming, clean the valve parts with a degreasing agent; if the valve parts are worn, grind the valve stem and add a small amount of grease; replace the valve if it is seriously damaged.
- Power Supply Failure
- Cause: A common and easy - to - repair cause of air compressor shutdown, covering problems such as power lines, switches, and voltage.
- Solution: Check the power line connection and power switch status; confirm the fuse is not blown; detect the voltage (should reach more than 90% of the rated voltage); verify the matching of power supply electrical components and the setting of electrical parameters.
- High Exhaust Temperature
- Cause: High temperature of oil coolers and water coolers, or sensor failure. After eliminating the alarm, it may reappear due to problems such as circulating water and lubricating oil.
- Solution: If due to excessive heat generation and poor heat dissipation of the equipment, check the air intake system (such as filters, flow resistance, dirt blockage); clean the cooling system and maintain the radiator; repair or replace the sensor if it fails; pay attention to the status of circulating water and lubricating oil.
- Excessive Head Resistance
- Cause: Overload of the air compressor causes the air switch to trip, mostly due to excessive head resistance, which increases the starting current. Problems such as high lubricating oil viscosity, excessive oil volume, and head coking will increase the resistance.
- Solution: Before starting in winter, turn the air compressor by hand to check the head resistance; pay attention to the impact of low temperature on lubricating oil viscosity; control the lubricating oil volume according to specifications; clean the head coking, and repair or replace the head if necessary.
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