Compressor fault diagnosis and troubleshooting is a technical process involving multiple aspects. The following is a detailed explanation of the diagnosis and troubleshooting methods for common compressor faults:
1、 Common faults and cause analysis of compressors
Locked rotor (stuck)
Reasons: Foreign objects entering the interior, uneven pressure on the high and low pressure sides, motor burning, low voltage, compressor running out of oil or overloaded, etc.
Diagnosis: The compressor does not move and makes a buzzing sound.
Troubleshooting methods: cleaning foreign objects, adjusting pressure balance, inspecting motor, checking voltage, supplementing or replacing refrigeration oil, etc.
Low exhaust pressure
Reasons: Compressor suction of liquid, condenser failure, high pipeline resistance, etc.
Diagnosis: The compressor can operate, but the exhaust pressure is insufficient.
Troubleshooting method: Check and eliminate the cause of inhaling liquid, repair or replace the condenser, and reduce pipeline resistance.
The current gradually increases and shuts down
Reason: Protector action, high suction pressure, mechanical damage, etc.
Diagnosis: The current gradually increases during the operation of the compressor until it stops.
Troubleshooting method: Check and reset the protector, adjust the suction pressure, repair or replace mechanical components.
Overcurrent
Cause: malfunction of the two devices, blockage of the refrigeration system, overload operation, etc.
Diagnosis: The compressor current exceeds the normal range.
Troubleshooting method: Check and repair the two devices, clean the blockage of the refrigeration system, and reduce overload operation.
High noise level
Reason: System instability, pipeline vibration, motor and blade noise, air or impurities in the system, etc.
Diagnosis: The compressor makes significant noise during operation.
Troubleshooting methods: Check system stability, reduce pipeline vibration, replace worn parts, and eliminate air or impurities in the system.
Damaged valve plate (lack of suction and exhaust capacity, high and low pressure gas flow)
Reason: Large valve clearance, jamming, crankshaft breakage, spring breakage, compressor oil shortage, etc.
Diagnosis: The compressor has no suction and exhaust capacity or has high and low pressure gas flow.
Troubleshooting method: Replace or repair valve plates, crankshafts, springs and other components, and supplement or replace refrigeration oil.
2、 Precautions for diagnosing and troubleshooting compressor faults
Safety: When conducting fault diagnosis and troubleshooting, it is essential to ensure safety, follow operating procedures, and avoid accidents.
Professional: For uncertain faults, it is recommended to seek professional assistance to avoid causing greater losses.
Maintenance: Regularly maintain the compressor, check lubricating oil, cooling water, etc., to ensure the normal operation of the compressor.
Reasonable use: Follow the operating procedures, use the compressor reasonably, and avoid improper operations such as overloading or frequent start-up.
Check parameters: Regularly check the various parameters of the compressor, such as voltage, current, pressure, etc., to ensure that they are within the normal range.
By using the above methods, common faults of the compressor can be effectively diagnosed and eliminated, ensuring the normal operation of the compressor.
