13
TROUBLESHOOTING GUIDE
Problem
Possible Cause
Solution
Low quantity of Product Water from
Holding Tank.
Feed Water 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
(276 kPa).
Membrane is fouled.
See Feed Water operating limits.
Correct reason 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 Restrictor is
plugged.
Clear or replace the 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 (276 kPa).
Check Feed Water Valve.
Membrane O-ring is crimped.
Check O-ring.
Membrane brine seal is not sealing up
into the manifold head.
Check the brine seal.
Membrane is expended.
If Membrane life is unusually short, find and
correct the problem.
Replace Membrane.
