| The suction pump cannot pump out water | Suction pump reverse | Adjust the wiring of the suction pump to make it rotate forward |
| There is no water in the suction pump cavity | Fill the suction pump cavity with water before starting |
| The suction pump inlet pipeline is seriously leaking | Find and repair leaks |
| The water contains a lot of bubbles | The suction pump inlet pipe is leaking | Find and repair leaks |
| Insufficient or uneven aeration | Blower failure | Find and correct the cause of the fault, repair or replace the blower |
| Internal and external aeration pipes are blocked | Find and correct the cause of blockage, clean or replace the internal and external aeration pipes |
| The water flow rate decreases or the transmembrane pressure difference rises too quickly | Grease and mineral oil, etc. MBR membrane blocked by dirt | Find and correct the cause of fouling and blockage, clean or replace the MBR membrane |
| Defoaming agents, coagulants and flocculants, etc. MBR membrane blocked by dirt | Find and correct the cause of fouling and blockage, clean or replace the MBR membrane |
| MBR pool water temperature is low | Increase water temperature according to design requirements |
| Sludge concentration is too low | Increase sludge concentration according to design requirements |
| Sludge concentration is too high | Reduce sludge concentration according to design requirements |
| Poor sludge settling performance | Improve sludge settling performance according to design requirements |
| High sludge viscosity | Reduce sludge viscosity according to design requirements |
| The water is turbid or the water quality is poor | Pretreatment failed | Ensure pretreatment is qualified according to design requirements |
| Bacteria growing inside the MBR membrane | Sterilization of MBR membranes |
| Bacteria growing inside the outlet pipe | Sterilize the water outlet pipe |
| Damaged water collection pipe | Find and correct the cause of damage, repair or replace the water collection pipe |
| Quick-release connector damaged | Find and correct the cause of damage, repair or replace the quick connector |
| Transparent hose is damaged | Find and correct the cause of damage, repair or replace the transparent hose |
| MBR membrane damage | Find and correct the cause of damage, repair or replace the MBR membrane |