Installation and Service Manual – Under-the-Counter Point of Use 5 Stage Reverse Osmosis System
Copyright © 2014 Applied Membranes, Inc.
All Rights Reserved.
Page 14
Troubleshooting Chart
Symptom Possible Cause Remedy
No water in the storage tank Filter Cartridges have failed. Replace filter cartridges as indicated in
maintenance section.
Cartridges are out of
sequence.
Install cartridges in proper sequence as
indicated in system components.
Cartridges are upside-down. Install carbon block filter right-side-up as
indicated on the filter.
No pressure in storage tank. Check pressure with gauge. Refill or reduce
pressure to max 8 psi.
Automatic shut-off valve
malfunctioning.
Check lines to valve for correct hook-up and
check water running into the drain. Replace if
necessary.
Kinked lines. Straighten lines if necessary.
Getting low flow Incoming water pressure too
low.
Check source of feedwater (city water, well
water, etc.) for pressure. A booster pump may
be required.
Change in feedwater
temperature.
The reverse osmosis membrane used in your
unit is rated at 77ºF and 60psi. Water
production will decrease approximately 1.5%
for each degree that your incoming water is
below 77ºF. It may be necessary to change to
a higher flow membrane (and flow restrictor).
Storage tank pressure is too
low.
Check pressure with gauge and refill to
maximum 8 psi.
Filters are clogged. Replace Filters.
Water leakage at filter bowls Filter bowls are loose. Retighten.
Burr on edge of filter bowl. Remove burr with emery cloth or sand paper.
O-Ring in filter bowls is
missing, damaged, or not
sealed properly
Replace or position correctly.
Water backing up to air gap
in faucet (Systems w/ air
gap faucets only)
Line is clogged. Clean out the line.
Line is too long. Must be as short and straight as possible.
Drain line is clogged. Disconnect 3/8” dia. Line and clean out with
probe or by flushing.
Faucet spout is dripping Handle sticking or worn. Replace the faucet
Milky colored water Air in the system Air in the system is normal after startup of the
RO. Water should lose the milky look within a
few days of normal usage.
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