Table 3-2. Troubleshooting (ROWPU) (continued)
TEST OR INSPECTION
Take care in disconnecting product water hose. Water is under pressure and
will discharge rapidly.
Disconnect product water hose from one vessel at a time to collect product
c. Check TDS sample from each R.O. vessel using TDS meter
extender (para. 2-32c(5)).
d. Use these findings to make a chart like the following:
The numbers on this chart are
examples only. Yours may vary.
e. Examine pattern of chart. TDS should get larger from top to bottom.
(1) If any R.O. vessel does not follow this pattern, there is something wrong
inside; disassemble the faulty vessel and replace defective items (see
(2) If R.O. vessels all follow this pattern, proceed to Step 3.
Check product water flow from each R.O. vessel:
a. Use same method as in Step 1 to collect water sample, but this time measure the
time in minutes it takes to fill a 3-gallon bucket with product water from each vessel.
Divide 3 by the number of minutes.