2. The unloading pressure setting is too low. Set the unloading pressure value correctly and make full use of efficiency.

3. The air filter element is dirty and blocked, resulting in insufficient intake of the compressor unit and low exhaust pressure. The air filter condition should be checked and replaced if necessary.

4. Solenoid valve failure. The main bleed solenoid valve and the cold start vent solenoid valve on the exhaust line leak and need to be replaced.

5. Control the leakage of the air line hose. Replace the control air line hose.

6. The intake valve is not sensitive and does not open completely. Need to overhaul and check the condition of the control system.

7. The oil separator is blocked and the oil separator filter needs to be replaced.