If the EDI module operates under high current and low flow for a long time, the accumulated heat cannot be dissipated, causing the membrane sheets near the two electrodes of the EDI to heat up and deform. This results in an increased pressure difference in the EDI concentrate stream, and both water quality and flow rate decrease to varying degrees.

If the EDI module is not cleaned and maintained for a long time, calcium and magnesium fouling will form on the EDI membranes and flow channels. This leads to an increase in the pressure difference between the inlet and outlet, resulting in declining product water quality, rising voltage, and uncontrollable current, eventually rendering the module unusable.

If the EDI module is not cleaned and maintained for a long time, or not protected during prolonged shutdown, organic matter will grow on the EDI membranes and flow channels. This leads to an increase in the inlet and outlet pressure difference, resulting in degraded product water quality, rising voltage, and uncontrollable current, eventually rendering the module completely unusable.

The use of inappropriate cleaning and disinfecting agents directly results in damage and breakage of the EDI resin, leading to an increase in the inlet and outlet pressure difference, thereby causing a decline in both product water quality and output.

When the EDI system is operated manually, applying power under water-deficient conditions directly causes the membranes and resin to overheat and carbonize, resulting in ineffective cleaning and making the module unusable.

If there is no security filter before the EDI inlet, foreign matter will directly block the EDI channels, causing an increase in the inlet and outlet pressure difference, a severe drop in product water flow, and ineffective cleaning.

as well as poor pre-treatment (softener, sodium sulfite dosing system, RO, etc.), control system failure/malfunction (issues with safety interlocks, low-flow protection), and inappropriate system design (e.g., no discharge of initial RO product water), among other factors.