16
SECTION VI. TROUBLE SHOOTING GUIDE
Problem
Possible Cause
Solution
Low quantity of Product Water
from Holding Tank
Feed Water Saddle Valve is plugged or
closed.
Open Valve or unclog.
Clogged Sediment Module or Activated
Carbon Module.
Replace Modules.
Low water pressure.
Feed Water pressure must be above
40 psig.
R.O. Membrane is fouled.
See Feed Water operating limits.
Correct cause of fouling, replace
Membrane.
Plugged In–Line Activated Carbon Post
Filter.
Replace Post Filter.
Air precharge pressure in Holding
Tank is too high.
Empty water from Holding Tank,
and with the faucet open, adjust air
pressure to 5–7 psig (35–48 kPa) range.
Air precharge is too low
Air bladder in the Holding Tank is
ruptured.
Replace tank.
Holding Tank Valve is closed.
Open Valve.
No drain flow, the drain Drain Restrictor
is plugged.
Clear or replace Drain Restrictor.
No drain flow, the drain orifice in the
Dispensing Faucet is plugged.
Clear or replace the Dispensing
Faucet.
The Check Valve is stuck.
Free check.
The ASO Valve is malfunctioning.
Replace ASO Valve components.
Low pressure at the Dispensing
Faucet
In–Line Activated Carbon Post Filter is
plugged.
Replace Post Filter.
Air precharge in the Holding Tank is too
low.
Empty water from Holding Tank and
with the faucet open, adjust the air
pressure to 5–7 psig (35–48 kPa) range.
Check for leakage at the Air Valve
Stem.
Holding Tank Valve is partially closed. Open Valve.
The Dispensing Faucet is out of
adjustment or faulty.
Repair or replace Dispensing Faucet.
Heavy water use, Holding Tank is
depleted.
Allow Holding Tank to refill (adding
a second Holding Tank will increase
storage capacity).
Low Water Production.
See Low Quantity of Product Water
from Holding Tank section above.
High Total Dissolved Solids (TDS) in
the Product Water
Clogged Sediment Module or Activated
Carbon Module.
Replace Modules.
Low Water Pressure.
Feed Water Pressure must be above
40 psig.
Check Feed Water Saddle Valve.
R.O. Membrane O–ring is crimped.
Check O–ring.
R.O. Membrane brine seal is not
sealing up into the manifold head.
Check the brine seal.
R.O. Membrane is expended.
If Membrane life is unusually short,
find and correct the problem. Replace
Membrane.
Summary of Contents for MRO-35
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