Diagnosis and troubleshooting of common faults of air compressor

The reasons for the failure of the unit are varied, a fault is usually not caused by a part or a factor, so the diagnosis and elimination of the fault is often difficult.
The fault diagnosis and elimination table is based on practical application and extensive testing by manufacturers. The table points out the common faults that may occur in the unit and the general causes of the above faults, as well as the methods of troubleshooting, but it is impossible to list all the faults and troubleshooting methods.

Before repairing or replacing components, a comprehensive and systematic analysis of the various possible factors that may have caused the failure should be carried out. When encountering problems, you should observe carefully, find out the fault, find out the cause, and then carry out necessary maintenance work to avoid unnecessary damage to the unit.

B. Check whether there is any damaged pipeline;

1. The power supply is not connected; close the upper power switch to connect the power supply.
2. The control circuit fuse is blown; replace the fuse, find out the reason and solve it.
3. High temperature shutdown caused by high exhaust temperature; solve it according to the chapter "High exhaust temperature or high oil injection temperature", and then restart the compressor.
4. The thermal overload relay is disconnected; the cause of overload is corrected and the thermal overload appliance is reset.
5. The voltage is too low; please check the input voltage from the power department and compare it with the motor terminal voltage. Check the cause of the low voltage.
6. Power failure; check the power supply part.
7. The wiring is loose; check all wiring terminals and tighten them.
8. Temperature sensor failure; check the sensor, and contact professionals for maintenance matters.
9. Transformer fault; check transformer secondary voltage.

Unexpected downtime

Troubleshooting methods for fault phenomena and possible causes

1. The exhaust pressure is too high; set the unloading pressure lower.
2. The voltage is too low; check the input voltage and current under full load.
3. The wiring of the thermal overload relay is loose; tighten the wiring screw of the thermal overload relay.
4. The thermal overload relay setting is incorrect; check the motor nameplate and compare with the overload relay setting.
5. The motor or starter wiring is loose; check whether all wiring is tightened.
6. Motor failure; send the motor to the manufacturer for inspection. Check the motor and starter wiring before removing the motor.

Insufficient gas supply

Troubleshooting methods for fault phenomena and possible causes

1. There is too much leakage in the working pipeline; check the leakage of the working pipeline with soapy water.
2. Intake valve is not fully open; press the section "Intake valve does not open or close according to air demand" to check the fault.
3. The air filter is blocked; clean or replace the air filter.
4. The capacity adjustment valve is not set correctly; Readjust the capacity adjustment valve to obtain the required adjustment range.
5. The pressure gauge of the air storage tank is damaged; check the reason, if damaged, please replace it.
6. Excessive air demand; re-estimate demand and add a machine if necessary.

Reservoir pressure too high

Troubleshooting methods for fault phenomena and possible causes

1. The cooling water in the cooler is insufficient; (only water-cooled type) clean the cooler. Check the water system failure, including water temperature control valve, if necessary, please re-adjust or clean.
2. The air circulation in the cooler is not sufficient; check the installation position of the cooler to ensure that the air flow is not obstructed. Check the cooler and clean it if necessary.
3. The oil level in the oil-gas separator is too low; add oil to the recommend height and check whether there is leakage in the oil circuit system.
4. The oil filter is blocked; replace the oil filter core.
5. The oil cooler is blocked; check whether there is paint film and rust, and thoroughly clean the cooler according to the recommend method of the heat exchanger manufacturer.
6. The ambient temperature is too high; the ambient temperature cannot exceed the higher ambient temperature of the machine.
7. The fan rotates in the wrong direction; the correct direction is that the fan pushes the air into the cooler and changes any two of the three-phase power lines.
8. Incorrect lubricating oil; use Pauleter rotor lubricating oil. Refer to Lubrication section.
9. The air filter is blocked; clean or replace the air filter
10. Temperature control valve is damaged; repair or replace as needed
11. The compressor head is damaged; contact the after-sales service department of Paulette

Excessive lubricating oil consumption

Troubleshooting methods for fault phenomena and possible causes

1. The air filter is damaged or not suitable for the use environment; replace the damaged air filter core. If it is not suitable for the use environment, you can choose a heavy-duty air filter or guide the compressor's suction to a place with clean air.
2. The oil filter is faulty; replace the oil filter core and use the genuine goods filter of Baolet Company.
3. The oil and gas separator core is damaged or inappropriate; replace the separator core and use the genuine goods filter core of Baolet Company
4. Lubricating oil deterioration; refer to the "maintenance-lubricating oil" part to solve the problem
5. Run in extreme environments, such as high temperature, high humidity, or high pressure; run the compressor under the rated oil and gas separator pressure and oil temperature to speed up the replacement cycle of lubricating oil or filter.
6. The lubricating oil is contaminated; replace the lubricating oil, repair and maintain the air filter core oil filter according to the daily maintenance table.
Different grades or different types of lubricating oil are mixed; do not mix different grades and different types of lubricating oil, and do not use lubricating oil from different manufacturers.
8. Use the wrong lubricating oil; refer to the lubricating oil section of the operation manual.
Improper use of lubricating oil; use lubricating oil as recommend. See lubrication section

Lubricating oil from vent valve

Troubleshooting methods for fault phenomena and possible causes

1. The oil filter is incorrect; use real Paulette spare parts.
2. The air filter is faulty; replace the air filter and only use the real Liuzhou Fidelity air compressor accessories.
3. Lubricating oil deterioration; according to the "maintenance-lubricating oil" section to find the fault.
4. The system is contaminated; check and remove dust, corrosive materials, paint film and sludge in the system.

Frequent air filter clogging

Troubleshooting methods for fault phenomena and possible causes

1. Control the excessive water in the pipeline; maintain the control pipeline every day.
2. Intake valve work error; check the cylinder, valve sleeve and other components, if necessary, replace.
3. Air inlet valve is stuck; check the inlet valve, valve sleeve, or shaft, and replace if necessary.
4. Solenoid valve failure; repair or replace as needed, and check the wiring before replacement.
5. The solenoid valve wire connector is loose; check and tighten the wire terminal.

The Saman air compressor cannot be unloaded when the compressed air demand is reduced.

Troubleshooting methods for fault phenomena and possible causes

1. The wire connection is loose; check all wire connections.
2. The intake valve is stuck; check and repair.
3. The capacity regulating valve fails; clean the orifice of the capacity regulating valve or replace the capacity regulating valve.
4. The loading pressure is not set correctly; the loading pressure is reset.
5. The solenoid valve is damaged; repair or replace.

Too fast switching between loading and unloading fault symptoms and possible causes

Troubleshooting Methods

1. The water/gas separator is blocked; clean or replace
2. Installation/application failure; check other compressors in the same system
3. The water cooler leaks; (water-cooled type only) replace the water cooler

Non-normal opening of safety valve

Troubleshooting methods for fault phenomena and possible causes