I. Insufficient exhaust pressure
Possible reasons:
1. The air filter is blocked, resulting in insufficient air intake.
2. The pressure regulator is improperly set or malfunctions.
3. Internal leakage of the compressor unit (such as damaged valves and seals).
4. The exhaust pipe is blocked or leaking.
Solution:
1. Clean or replace the air filter.
2. Check and adjust the pressure regulator.
3. Check and repair internal leaks.
4. Clean or repair the exhaust pipe.