TM 10-4610-215-10
TM 08580A-10/1
Table 3-2. Troubleshooting (ROWPU) (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
a. If water is turbid, shut down ROWPU in normal manner (para. 2–29) and change
cartridge filter elements (para. 3–5).
b. If water is clear, notify unit maintenance because gage may be defective.
4.
REDUCED PRODUCT WATER FLOW; R.O. PRESSURE
SALTWATER, 500 FOR FRESH AND BRACKISH WATER.
NOTE
PSI ADJUSTED TO 960 FOR
ROWPU produces less product water when raw water source temperature
drops (3 %. less per degree Celsius drop).
Step 1.
Check R.O. vessels for leaks caused by loose end caps or defective end cap O-rings.
a. Tighten loose nuts (para. 3-4h(15)).
b. Replace defective end cap O-rings (see para. 3-4c – elements need not be
replaced).
Step 2.
Check R.O. vessel gage for reading higher than 100 psid.
NOTE
Membrane scaling may cause reduced product water flow without increasing
R.O. vessel pressure. Cleaning elements when vessel pressure is under 100
psid may improve flow.
a. Clean R.O. elements (para. 2–28).
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 as follows:
a. (Model 600-3) - Use sample valves to collect product water sample. Do NOT
disconnect product water hoses.
b. (Model 600–1) – Sample valves are not available.
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