GE Z-14400 - Manual (Page 80)

Z Series RO System by GE Osmonics
5.7 Excess Product Pressure (Product Return Port Connected)
1. Feed Water Pressure Too High
a. Install pressure regulator if not already present and reduce pressure.
2. Product Flow Rate Too High
a. Decrease operating pressure by adjusting pump pressure regulator.
b. Increase waste flow by adjusting waste flow valve.
3. Distribution Loop Creates Too Much Back Pressure
a. Reduce waste pressure to reduce flow rate and resulting friction loss.
b. Install pressure relief valve on product line.
5.8
Product Flow Too Low
1. Waste Flow Too Low
a. Adjust waste pressure regulator.
2. Low Feed Water Temperature
a. Install or adjust temperature blending valve.
3. Membrane Fouled Or Scaled
a. See test report for original flow rate.
b. Clean membrane following procedure outlined in manual.
4. Center Tube Of ROMA Collapsed From Operating At High Temperatures
a. Correct high temperature condition.
5. Check Pretreatment For Brackish Water
a. Check inlet water for high conductivity.
b. Check water softener for proper function.
c. Regenerate softener as required.
d. Check supply water for hardness and conductivity.
1238339b – 16Oct03 5 - 8 Troubleshooting