TM 10-4610-241-10
TO 40W4-13-41
Table 3-2. Operator Troubleshooting (ROWPU) - cont.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
(2)
If all vessels follow this pattern, notify unit maintenance to check for defective PRODUCT FLOW
indicator.
6.
R.O. PRESSURE PSIG. GOES ABOVE 960 PSI IN SALTWATER OPERATION, 500 IN FRESH OR BRACKISH
WATER OPERATION.
Step 1. Check R.O. VESSELS gage.
If indication is above 100 psid, clean R.O. element (para. 2-13).
Step 2. Check PRODUCT WATER FLOW gage.
a. If glow is less than 10 gpm (fresh and brackish water), clean R.O. elements (para. 2-13).
b. If flow is less than 6 gpm (salt water), clean R.O. elements (para. 2-13).
Step 3. Check raw water TDS, if TDS has increased noticeably, open REGULATE PRODUCT FLOW valve to
adjust R.O. pressure and maintain 10 gpm (fresh/brackish water) or 6 gpm (saltwater).
If product water flow cannot be maintained, clean R.O. elements (para. 2-13).
7.
BACKWASH PUMP RUNS CONTINUOUSLY.
Step 1. Check position of R.O. ELEMENT CLEANING switch (24, figure 2-5). Switch must be OFF except during
R.O. element cleaning.
Set ELEMENT CLEANING switch to OFF position.
Step 2. Notify unit maintenance to troubleshoot BACKWASH TIMER and its electrical wires.
3-8
