Table 3-2. Troubleshooting (ROWPU) (continued)
TEST OR INSPECTION
Examine your chart for a similar pattern Flow should get smaller from top to bottom.
If any R.O vessel does not follow this pattern, disassemble that vessel and replace defective
If all vessels follow this pattern, notify unit maintenance to check for defective PRODUCT
R.O PRESSURE PSIG GOES ABOVE 960 PSI IN SALTWATER OPERATION, 500 IN FRESH
OR BRACKISH WATER OPERATION.
Check TDS of product water (para.2-32c(4)).
If TDS over 1500 ppm, shut down ROWPU in normal manner (para.2-29) and clean R.O
If TDS below or at 1500 ppm, notify unit maintenance of possible defective gage.
BACKWASH PUMP RUNS CONTINUOUSLY.
Check position of R.O ELEMENT CLEANING switch Switch must be off except during R.O element
Turn ELEMENT CLEANING switch to OFF position.
Notify unit maintenance to troubleshoot BACKWASH TIMER and its electrical wires.
BACKWASH WATER FLOW READING DROPS TO NEAR ZERO DURING BACKWASH OPERATION;
BACKWASH PUMP LAMP IS ON.
Check for closed or clogged valve on tank.
Open closed valve by turning handle fully to the left until it stops (counter- clockwise).
Clean clogged valve.
Check for clogged strainer or BACKWASH PUMP suction opening (para.36).
Flush strainer with product water to remove debris.
Remove debris from suction opening.