Reverse Osmosis System Fault Diagnosis ④
Fault appearance and troubleshooting
Possible reason |
Appearance |
Confirm item |
Solution method |
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Water-output volume |
Salt-escape percentage |
Pressure drop |
|||||
Membranes element |
Membranes performance weak |
Raising |
Down |
Down |
Operation time, water-input temperature and water quality |
Clean and replaced |
|
Leak |
Raising |
Down |
Down |
Vibration, back pressure or impact |
Clean and replaced |
||
0 shape ring leak |
Raising |
Down |
Down |
Vibration, impact and annealed |
Replace 0 shape ring |
||
concentrated water sealing ring leak |
Down |
Down |
Down |
Annealed and volume adhesive |
Replace seal ring, suitable size |
||
Center tube destroyed |
Raising |
Down |
Down |
Too bigger pressure different |
Replace membranes element |
||
Shape changed |
Down |
Down |
Raising |
Too bigger pressure different |
Replace membranes element |
||
Membranes surface pollution(float particles) |
Down |
Down |
Raising |
Pre-treatment problem and volume adhesive |
Chemical clean |
||
Membranes surface pollution(deposition) |
Down |
Down |
Raising |
Pre-treatment problem and volume adhesive |
Chemical clean |
||
Membranes surface pollution(organic and oil) |
Down |
Down |
Raising |
Pre-treatment problem and volume adhesive |
Chemical clean |
||
Raw water and pre-treatment |
Temp. change |
High |
Raising |
Down |
Down |
Season change, pump effect |
Adjusting pressure, reducing temp. |
Low |
Down |
Balance |
Raising |
Season change, heater |
Adjusting pressure, heater |
||
Pressure change |
High |
Raising |
Raising |
Down |
Pump, valve |
Adjus, , ting pressure |
|
Low |
Down |
Down |
Raising |
Pump, valve, filter |
Adjusting pressure |
||
concentrated water volume change |
Too large |
Balance |
Balance |
Raising |
Water-input volume, valve |
Adjusting water-input |
|
Too small |
Down |
Down |
Down |
Water-input volume, valve, pressure drop |
Adjusting water-input |
||
PH value too high or too low(membranes performance down) |
Raising |
Down |
Down |
PH value control |
Adjusting PH value |
||
concentration |
High |
Down |
Down |
Down |
Water quality |
Adjusting pressure |
|
Low |
Raising |
Raising |
Raising |
Water quality |
Adjusting pressure |
||
Excessive difficult solution matter |
Down |
Down |
Raising |
Raw water, restore , PH value |
Adjusting pre-treatment, adjusting pressure, restore |
||
Within oxidants (Cl2, H2,O2,) |
Raising |
Raising |
Down |
Raw water quality, chemical medicine pump |
Adding condition on chemical medicine |
Note: 1, Fault changes based on detail situation.
2, The underlined means main fault appearance.