Air compressor parts troubleshooting reference table

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If any abnormal phenomena occur, it is necessary to immediately identify the cause of the fault and resolve it right away; only after it has been fixed can the device be used again. Do not continue using it blindly, as this may lead to unpredictable losses. Possible causes of fault symptoms, troubleshooting methods, and countermeasures
Air compressor fails to start:
1. Fuse blown – Have an electrician inspect and replace it.
2. Faulty starting electrical component.
3. Poor contact at the start button.
4. Poor circuit connections.
5. Low voltage.
6. Faulty main motor.
7. Host unit malfunction (abnormal noises from the host, localized overheating).
8. Missing phase in the power supply.
9. Overload of the fan motor.

High operating current causes the air compressor to shut down automatically (main motor overheating alarm):
1. Too low voltage – Have an electrician check it.
2. Excessively high exhaust pressure – Check/adjust the pressure settings.
3. Clogged oil-gas separator – Replace it with a new one.
4. Faulty compressor host unit – Disassemble and inspect the unit.
5. Circuit fault – Have an electrician check it.

Exhaust temperature lower than normal:
1. Faulty temperature control valve – Inspect, clean, or replace the valve element.
2. Prolonged idling time – Increase air consumption or shut down the compressor.
3. Faulty exhaust temperature sensor – Check and replace it.
4. Faulty intake valve, with the intake opening not fully open – Clean or replace the valve.

Excessively high exhaust temperature, causing the air compressor to shut down automatically (excessively high exhaust temperature alarm):
1. Insufficient lubricant level – Check and add more lubricant.
2. Incorrect lubricant specification/model – Replace it with the correct type of lubricant.
3. Clogged oil filter – Check and replace it with a new one.
4. Clogged oil cooler or severe dirt on its surface – Check and clean it.
5. Faulty temperature sensor – Replace it with a new one.
6. Temperature control valve malfunctioning – Check, clean, and replace it with a new one.
7. Excessive dust accumulation on the fan and cooler – Remove and clean them thoroughly.
8. Fan motor not running – Check the circuit and the fan motor.

High oil content in the discharged air:
1. Damaged oil-gas separator – Replace it with a new one.
2. Clogged check valve for oil return – Clean the check valve.
3. Excessive amount of lubricant – Drain some of the cooling oil.

Air compressor’s air output is lower than normal:
1. Clogged air filter – Blow out the debris or replace the filter.
2. Clogged oil-gas separator – Replace it with a new one.
3. Leaks in the solenoid valve – Clean or replace it.
4. Leaks in the air pipeline components – Check and repair them.
5. Slipping or loose belt – Replace the belt or tighten it.
6. Intake valve not opening fully – Clean or replace the damaged component.

Oil leaks from the air filter after shutdown: The spring in the check valve inside the intake valve is faulty or the seal of the check valve is damaged; replace the damaged components.

Safety valve activates and sprays oil:
1. The safety valve has been in use for a long time, resulting in fatigue of the spring – Replace it or readjust it.
2. Clogged oil-gas separator – Replace it with a new one.
3. Pressure control malfunction, leading to high operating pressure – Check and readjust it