1. Voltage Too High or Too Low
The normal voltage is 380V, with an error within 10%.
2. Contactor Fails to Close Tightly
For a 50Hz - powered
compressor, check if the contact points of the contactor are normal.
3. Set Pressure Higher Than Factory - set Pressure Value
The set pressure shall not exceed the maximum pressure value indicated on the compressor's nameplate.
4. Air Compressor Fails to Unload and Run
Check if the air inlet valve is completely closed during the compressor's unloading process.
5. Clogged Oil - Gas Separation Core
Check if the oil - gas separation core hasn't been replaced for a long time, as this can cause blockage.
6. Drive Belt Too Loose or Too Tight (for Old Machines)
For old machines, check if the tightness of the drive belt is appropriate.
7. Minimum Pressure Valve Not Opened
Check if the minimum pressure valve is fully opened.
8. Pressure Sensor Malfunction
The pressure sensor may be insensitive or provide inaccurate data.
9. Display Screen Malfunction
Measure whether the actual current matches the current shown on the display.
10. Air Compressor Beyond Maintenance Interval
Timely maintain the air compressor, and replace the three filters and the lubricating oil.
11. Aging Power Cord
Replace the power cord or tighten the terminal screws.
12. Motor Bearing Wear
Check if the motor bearings are worn.
13. Internal Bearing Wear of the Compressor Head
Replace the internal bearings of the compressor head if there is excessive end - face clearance.
14. Aging Motor Coil or Demagnetization of Permanent Magnet Motor
Check if the motor coil is aging or if the permanent magnet motor has become demagnetized.
