TM 10-4610-241-10
TO 40W4-13-41
Table 3-2. Operator Troubleshooting (ROWPU) - cont.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
c. Replace damaged gaskets.
Step 6. Check for kinked hoses.
Unkink hoses.
3.
CARTRIDGE FILTER GAUGE RISE ABOVE 20 PSID.
Make a turbidity tube check (para. 2-9i) of water taken from DRAIN NO. 1 CARTRIDGE FILTER valve (figure 2-
59).
a. If water is turbid, shutdown ROWPU in normal manner (para. 2-14a) and change cartridge filter tubes
(para. 3-5).
b. If water is clear, notify unit maintenance (gage may be defective).
4.
REDUCED PRODUCT WATER FLOW; R.O. PRESSURE PSI ADJUSTED TO 960 FOR SALTWATER, 500 FOR
FRESH AND BRACKISH WATER.
NOTE
ROWPU produces less product water when raw water source temperature drops.
Step 1. Check R.O. vessels for leakage past end caps.
a. Tighten loose nuts (para. 3-4).
b. If vessel continues to leak, notify unit maintenance.
Step 2. Check R.O. vessel gauge for reading higher than 100 psid.
NOTE
Membrane scaling will cause reduced product water flow and increased R.O. vessels pressure.
Cleaning elements when vessel pressure is under 100 psid may improve flow.
a. Clean R.O. elements (para. 2-12).
b. If cleaning R.O. elements does not improve product water flow, replace R.O. elements (para. 3-4).
3-5
