Axeon Water Technologies CT-4000, User Manual, Page: 34 / 54

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ENGF-107 REV. A 01/11 © 2011 AXEON Water Technologies
REVERSE OSMOSIS TROUBLESHOOTING
SYMPTOMS POSSIBLE CAUSES CORRECTIVE ACTION
Low Inlet Pressure
Low supply pressure Increase Inlet Pressure
Cartridge filters plugged Change Filters
Solenoid valve malfunction Replace Sol. Valve and/or Coil
Motor may not be drawing correct
current Use clamp-on amp meter to check
the motor amp draw.
Concentrate valve might be damage Replace Needle Valve
Leaks Fix any visible leaks
Low Permeate Flow
Low inlet flow Adjust concentrate valve
Cold feed water See temperature correction sheet
Low operating pressure See low inlet pressure
Defective membrane brine seal Inspect & or replace brine seal
Fouled or Scaled membrane Clean membranes
High permeate flow
Damaged product tube o-rings Inspect and/or replace
Damaged or oxidized membrane Replace membrane
Exceeding maximum feed water
temperature
See temperature correction sheet
Poor permeate quality
Low operating pressure See low inlet pressure
Damage product tube o-rings Inspect and/or replace
Damaged or oxidized membrane Replace membrane
Membrane fouling
Metal Oxide Fouling
Improve pretreatment to remove
metals. Clean with Acid Cleaners.
Colloidal Fouling
Optimize pretreatment for colloid
removal. Clean with high pH anionic
cleaners.
Scaling (CaSO4, CaSO3, BaSO4,
SiO2)
Increase acid addition and
antiscalant dosage for CaVO3 and
CaCO4. Reduce recovery. Clean
with Acid Cleaners
Biological Fouling
Shock dosage of Sodium Bi-Sulfate.
Continuous feed of Sodium Bi-
Sulfate at reduced pH.
Chlorination and de-chlorination.
Replace cartridge filters.
Organic Fouling
Activated Carbon or other
pretreatment. Clean with high pH
cleaner.
Chlorine Oxidation
Check Chlorine feed equipment and
de-chlorination system.
Abrasion of membrane by Crystalline
Material
Improve pretreatment. Check all
filters for media leakage.