TM 10-4610-241-10
TO 40W4-13-41
Table 3-2. Operator Troubleshooting (ROWPU) - cont.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5.
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:
WARNING
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
hoses.
b. Check TDS of sample from each R.O. vessel using TDS meter without range extender (para. 2-
15c(5)).
c. Use readings to make a chart similar to the following:
R.O. Vessel
TDS (ppm)
1 (Top)
600
2
900
3
1100
4 (Bottom)
1400
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.
NOTE
Numbers on charts are examples
only. Yours may vary
3-6
