16
SECTION V. 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 Prefilter or Activated
Carbon Prefilter.
Replace filters.
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 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 Prefilter or Activated
Carbon Prefilter.
Replace Filters.
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 T.F.C.-400
Page 13: ...13 NOTES...
Page 14: ...14 NOTES...
Page 15: ...15 NOTES...
Page 18: ...18 MADE IN USA 15 Exploded View Parts List 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16 18 17...
