TM 10-4610-215-10
TM 08580 A-10/1
Table 3-2. Troubleshooting (ROWPU) (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
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 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 (para. 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 (para. 2-32c(4)).
a. If TDS over 1500 ppm, shut down ROWPU in normal manner (para. 2-29) and
clean R.O. elements (para. 2–28).
b. If TDS below or at 1500 ppm, notify unit maintenance of possible defective gage.
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.
Step 2.
Notify unit maintenance to troubleshoot BACKWASH TIMER and its electrical wires.
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