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Reverse Osmosis System Fault Diagnosis ④

Fault appearance and troubleshooting

Possible reason

Appearance

Confirm item

Solution method

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.  
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