Pentair PRF-RO Manuel D'installation Et De Maintenance page 19

7 - TROUBLESHOOTING
Issue
E
Low product
flow rate
N
G
L
I
S
H
Concentrate water
runs to drain after
faucet shut off
Poor product
water quality
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Possible Cause
Low driving pressure
Low water temperature or high
total dissolved solids (TDS)
Plugged prefilter
Scaled or fouled RO membrane
Faucets not adjusted properly
Plugged postfilter
Leak or kink in product line
Plugged prefilter
Leak in product line
Water sample taken during
system flush
Low driving pressure
Plugged prefilter
Scaled, fouled, or damaged
RO membrane
Corrective Action
Increase feed pressure. Consider pump for low
pressure locations. Use short tubing runs to decrease
flow restriction. Increase tubing diameter for longer
distances.
Increase feed water temperature or feed pressure to
compensate.
Replace plugged prefilter. Consider sediment prefilter
for non-chlorinated applications.
Replace membranes.
Adjust faucet t-bar setting as tight as possible without
causing leaks from the faucet.
If flow into the postfilter is acceptable, replace
postfilter.
Find and repair leak or kink.
Replace plugged prefilter. Consider sediment prefilter
for non-chlorinated applications.
Find and repair leak. Install pressure gauge in product
line to help identify a product pressure leak.
Take sample after three minutes of continuous
operation.
Increase feed pressure. Consider pump for low
pressure locations. Use short tubing runs to decrease
flow restriction. Increase tubing diameter for longer
distances.
Replace plugged prefilter. Consider sediment prefilter
for non-chlorinated applications.
Replace RO membranes.
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