| Fault | Reason | Treatment Method |
| | 1. The water level inside the pump is too high | Ø Check and adjust the water level to the normal level |
| Difficulty initiating | 2. Power supply issues | Ø Check for power outage or short circuit |
| Stuck during testing or operation | 3. Severe scaling | Ø Disassemble, remove or acid wash |
| | 4. The packing gland is too tight | Ø Loosen the gland bolts |
| | 5. Rust on internal components | Ø Pull the rotor hard and clean it with oxalic acid |
| | 6. Foreign objects get stuck in the pump rotor | Ø Rinse with water and open for inspection |
| | | |
| | 1. Improper adjustment of current protection in the electrical control cabinet | Ø Adjust the rated current of the thermal relay setting |
| Motor short circuit or overload | 2. Winding short circuit | Ø Check the motor winding |
| | 3. High flow rate of working fluid | Ø Adjust the inlet valve to reduce the flow of working fluid |
| | 4. Excessive exhaust pressure | Ø Reduce the exhaust pressure to the specified range |
| | 5. Excessive liquid content in inhaled gas | Ø Install a separator at the entrance or reduce the flow rate of the working fluid |
| | | |
| | 1. Severe scaling | Ø Disassemble, clean and use acid pickling |
| Low vacuum degree | 2. Belt slippage causes a decrease in rotational speed | Ø Tighten the belt |
| | 3. Insufficient water supply or high temperature | Ø Adjust the water supply and reduce the temperature of the working fluid |
| | 4. Vacuum system leakage | Ø Check for leaks in the stuffing box pipeline and pump clearance |
| | 5. The vacuum gauge displays incorrectly | Ø Replace the vacuum gauge |
| | 6. Valve plate detachment | Ø Replace the valve plate |
| | | |
| | 1. High temperature causes cavitation | Ø Use cooling water |
| | 2. Gas friction or ejection | Ø Lead the exhaust outlet outside |
| High vibration and noise | 3. Poor axis alignment | Ø Re align and lock |
| | 4. Loose foundation bolts | Ø Tighten the foundation bolts |
| | 5. High flow rate of working fluid | Ø Install orifice flowmeter to reduce flow rate |
| | 6. The wall of the suction and exhaust pipes is too thin | Ø Using a thick walled trachea |
| | | |
| | 1. The belt is too tight | Ø Loosen the belt appropriately |
| | 2. The water ring pump of the motor reducer is not aligned | Ø Re centering |
| Heating in the bearing area | 3. Insufficient or excessive lubricating grease | Ø Improve lubrication conditions |
| | 4. Improper installation of bearings | Ø Adjust bearings |
| | 5. The bearing is corroded and the raceway is scratched | Ø Replace the new bearing |
