14
QCRO Manual 180728.docx
SECTION VI. TROUBLE SHOOTING GUIDE
Problem
Possible Cause
Solution
Low quantity of Product
Water from Storage Tank
Feed water saddle valve is
plugged or closed.
Open valve or unclog.
Clogged sediment pre-filter or
activated carbon pre-filter.
Replace filters.
Low water pressure
Feed water pressure must be above
40 psig.
R.O. membrane is fouled.
See feed water operating limits
(page 4). Correct cause of fouling,
replace membrane.
Plugged activated carbon post
filter.
Replace post-filter.
Air pre-charge pressure in storage
tank is too high.
Empty water from storage tank, and
with the faucet open, adjust air
pressure to 5
–7 psig (5–8k Pa)
range.
Air pre-charge is too low.
See above and check for leakage at
the air valve stem.
Air bladder in the Holding Tank is
ruptured.
Replace tank.
Holding Tank Valve is closed.
Open valve.
No drain flow, the Drain Restrictor
or drain line is plugged.
Clear or replace drain restrictor
and/or drain line.
The Check Valve is stuck.
Clear or replace check valve.
The ASO valve (Auto Shutoff
valve) is malfunctioning.
Replace ASO valve.
Low pressure at the
Dispensing Faucet
Air pre-charge in the storage tank
is too low.
Empty water from storage tank and
with the faucet open, adjust the air
pressure to 5
–7 psig (5–8 kPa)
range. Check for leakage at the air
valve stem.
Storage tank valve is partially
closed.
Open valve.
The dispensing faucet is out of
adjustment or faulty.
Repair or replace dispensing faucet.
Heavy water use, storage tank is
depleted.
Allow storage tank to refill (adding a
second storage tank will increase
storage capacity).
Low water production.
See
“Low Quantity of Product Water
from Storage Tank
” section above
Clogged sediment pre-filter or
activated carbon pre-filter.
Replace filters.
Low water pressure
Feed water pressure must be above
40 psig.
