Top 12 Common Problems and Maintenance Guide for Reverse Osmosis Equipment

I. Possible reasons for low water pressure:

1. Improper water flow rate;

2. System leakage;

3. Insufficient water pressure at the high-pressure pump inlet, or water/air leakage in the pump;

4. Clogging of the precision filter element;

5. High-pressure pump malfunction.

II. Possible reasons for high water pressure:

1. Improper adjustment of the high-pressure pump outlet valve;

2. Pipe blockage between the high-pressure pump and the reverse osmosis unit;

3. Concentrate valve closed too tightly or blocked, resulting in low concentrate discharge flow;

4. Recovery rate too low.

III. Possible reasons for low recovery rate:

1. Excessive water flow rate;

2. Low water pressure or concentration.

IV. Possible reasons for high recovery rate:

1. Excessive water pressure;

2. Insufficient water flow rate;

V. Possible reasons for high pressure drop across the reverse osmosis equipment:

1. High concentrate flow rate;

2. Membrane element fouling;

VI. Possible reasons for high-pressure pump shutdown:

1. Excessive pump discharge pressure (greater than 1.7 MPa);

2. Excessive low pump inlet water pressure (less than 0.05 MPa).

VII. Possible reasons for reduced water production of the reverse osmosis equipment:

1. Low feed water temperature;

2. Low feed water pressure;

3. High concentrate concentration causing high osmotic pressure;

4. Membrane fouling.

VIII. Possible reasons for increased water production of the reverse osmosis equipment:

1. High feed water pressure;

2. High feed water temperature.

IX. Possible reasons for simultaneous increase in product water conductivity and concentrate conductivity of the reverse osmosis equipment:

1. Clogging of the concentrate pipe or concentrate control valve;

2. Excessive recovery rate.

X. Possible reasons for high product water conductivity, high concentrate conductivity, and high pressure drop in each section of the reverse osmosis equipment: Membrane element fouling, restricting concentrate flow rate.

XI. Possible reasons for high product water conductivity, increased pressure drop across each pressure vessel, and low product water flow rate in the reverse osmosis equipment: Membrane element fouling.

XII. Possible reasons for high pressure drop across each pressure vessel, low product water flow rate, and increased product water conductivity: Membrane element channel fouling/blockage.