TM 10-4610-239-10TM 08580B-10/1Table 3-2. Troubleshooting (ROWPU) (continued)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONa. If water is turbid, shut down ROWPU in normal manner (para. 2-29) and change cartridge filterelements (para. 3-5).b. If water is clear, notify unit maintenance because gage may be defective.4.REDUCED PRODUCT WATER FLOW; R.O. PRESSURE PSI ADJUSTED TO 960 FOR SALTWATER, 500 FORFRESH AND BRACKISH WATER.NOTEROWPU produces less product water when raw water source temperature drops (3 % less per degreeCelsius drop).Step 1. Check R.Ovessels 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 0rings (see para. 3-4c - elements need not be replaced).Step 2. Check R.Ovessel gage for reading higher than 100 psid.NOTEMembrane 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.Clean R.O. elements (para. 2-28).5 PRODUCT WATER FLOW READING RISES ABOVE 16 GPM (FRESH/ BRACKISH), 12 (SEAWATER) ANDCANNOT BE LOWERED USING REGULATE PRODUCT FLOW VALVE.Step 1. Check the TDS of product water from each R.O. vessel as follows:a. Use sample valves to collect product water sample. Do NOT disconnect product water hoses.WARNINGDo not disconnect product water hose. Water is under pressure and will discharge rapidly.3-6
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