TM 10-4610-240-10
TM 08580C-10/1
T.O. 40W4-13-21
Table 3-2. Troubleshooting (ROWPU) (continued)
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. (Continued)
b. Make a chart like the following:
R.O. Vessel
FLOW (gpm)
1 (-Top)
4
2
3
3
2
4 (Bottom)
1
c. Examine your chart for a similar pattern. flow rate should get smaller from top to bottom.
(1)
If any R.O. vessel does not follow this pattern, disassemble that vessel and replace
defective items (paragraph 3-4).
(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 TDS of product water (paragraph 2-1(4)).
a. If TDS over 1500 ppm, shut down ROWPU in normal manner (paragraph 2-14) and clean R.O.
elements (paragraph 2-13).
b. If TDS below or at 1500 ppm, notify unit maintenance of possible defective pressure gauge.
7.
BACKWASH PUMP RUNS CONTINUOUSLY.
Step 1.
Check position of R.O. ELEMENT CLEANING switch. Switch must be off except during R.O.
element cleaning.
Turn ELEMENT CLEANING switch to OFF position.
3-8
