COMMERCIAL AND INDUSTRIAL APPLICATIONS 31
Rev C
TROUBLESHOOTING
Issue Possible Cause Corrective Action
Low permeate flow 1. Net driving pressure and/or
inlet temperature too low.
2. Plugged prefilter.
3. Scaled or fouled RO
membrane.
4. Faucet not adjusted properly.
5. Plugged postfilter.
6. Leak or kink in permeate line.
1. Measure and record actual flow rate
from faucet.
2. Determine net driving pressure. Refer to
page 6.
3. Using net driving pressure and inlet
temperature, compare actual flow rate
to predicted flow as shown in Table 1.
4. Reduce pressure losses due to tubing,
elevation, and fittings.
5. Install booster pump for applications
where an increase in inlet pressure will
provide acceptable flow according to
Figure 2.
6. Replace plugged prefilter. Consider
sediment prefilter for non-chlorinated
applications.
7. Replace membrane elements.
8. Adjust faucet t-bar setting as tight as
possible without causing leaks from the
faucet.
9. If flow into the postfilter is acceptable,
replace postfilter.
10. Find and repair leak or kink.
Concentrate water
runs to drain after
faucet shut off
1. Pressure created by trapped
air in the system affecting
operation of the automatic
shut off valve.
2. Clogged prefilter reducing
pressure in permeate line.
3. Leak in permeate line
reducing pressure.
1. Install postfilter or ASO cartridge.
2. Inspect prefilter. Replace clogged
prefilter.
3. Find and repair leak.
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