| The Blower Is Unable to Run: | |
| Potential Cause | Remedy |
| Electric circuit problem | Inspect and repair the electric circuit |
| Motor problem | Inspect and repair the motor |
| Foreign objects drop into chamber | Remove the foreign objects |
| Rusted rotors | Remove the rust |
| Foreign objects between the gears | Remove the foreign objects |
| Clogged suction/discharge of blower | Remove the clog or open the valve |
| Over-high Discharge Temerature: | |
| Potential Cause | Remedy |
| Excessive oil level | Lower the oil level |
| Over-high filter resistance | Clean the filter mesh |
| Over-high pressure difference between suction and dis. | Find out the cause and lower the pressure difference |
| Deviated rotors clearance | Send back to factory to do adjustment |
| Over-high Bearings Temperature: | |
| Potential Cause | Remedy |
| Excessive oil level | Lower the oil level |
| Excessive or sufficient viscosity of oil | Replace the proper oil |
| Over-high operation pressure | Improve the operation pressure |
| Changing of the suction air | Find out the cause and improve it |
| Worn bearings | Send back to factory to replace the bearings |
| Worn shaft at the bearings position | Send back to factory to replace the bearings |
| Excessive belts tension | Adjust the belts tension |
| Effect of rotors temperature rising | Find out the cause and improve it |
| Over-high Oil Temperature: | |
| Potential Cause | Remedy |
| Excessive or insufficient oil | Inspect oil level |
| Excessive or sufficient viscosity of oil | Replace the proper oil |
| Over-high operation pressure | Improve the operation pressure |
| Worn gears | Send back to factory to replace the gears |
| Excessive gears clearance | Send back to factory to replace the gears |
| Current Overload: | |
| Potential Cause | Remedy |
| Over-high pressure difference between suction and dis. | Find out the cause and lower the pressure difference |
| Over-high blower's rpm. | Lower the blower's rpm. |
| Motor problem | Inspect and repair the motor |
| Rusted rotors | Remove the rust |
| Foreign objects drop into chamber | Remove the foreign objects |
| Collision of the rotors | Send back to factory to do adjustment |
| Collision of the rotors and side plate | Send back to factory to do adjustment |
| Abnormal Sounds: | |
| Potential Cause | Remedy |
| Collision of the rotors | Send back to factory to do adjustment |
| Collision of the rotors and side plate | Send back to factory to do adjustment |
| Worn gears | Send back to factory to replace the gears |
| Foreign objects drop into chamber | Remove the foreign objects |
| Insufficient belts tension | Adjust the belts tension |
| Broken bearings | Send back to factory to replace the bearings |
