Table 3-2. Operator Troubleshooting (ROWPU) - cont.
TEST OR INSPECTION
PRODUCT WATER FLOW READING RISES ABOVE 16 GPM (FRESH/BRACKISH), 12 (SEAWATER) AND
CANNOT BE LOWERED USING REGULATE PRODUCT FLOW VALVE.
Step 1. Check the TDS of product water from each R.O. vessel:
Water is under pressure and will discharge rapidly. DO NOT disconnect product water hoses.
a. Use sample valves (figure 2-47) to collect product water sample. DO NOT disconnect product water
b. Check TDS of sample from each R.O. vessel using TDS meter without range extender (para. 2-
c. Use readings to make a chart similar to the following:
d. Examine pattern of chart. TDS readings should get larger from top to bottom.
(1) If any R.O. vessel does not follow this pattern, there is something wrong inside; disassemble
faulty vessel and replace defective items (para. 3-4).
(2) If R.O. vessels all follow this pattern, proceed to Step 2.
Numbers on charts are examples
only. Yours may vary