RF – Series User Manual
MKTF – 167-C
16
05/17
Not Enough Water From Holding Tank
Possible Cause
Solution
Feedwater valve is plugged or
closed.
Open valve or unclog.
Sediment/carbon prefilter or carbon
post filter is clogged.
Replace filters.
Low incoming water pressure.
Incoming water pressure must be above 40 PSI. Install a booster pump or
permeate pump.
Reverse osmosis membrane is
fouled.
Make sure incoming water pressure is within operating limits. Make sure drain
line is not clogged. (See High TDS) Correct cause of fouling and replace
reverse osmosis membrane.
Air pressure in holding tank is
incorrect.
Empty water from holding tank. Air pressure in valve stem should be between
8 – 10 PSI.
Air bladder in holding tank is
ruptured.
Replace holding tank.
Holding tank valve is closed.
Open valve.
No water to drain. Drain flow
restrictor is clogged.
Replace drain flow restrictor.
No water to drain. Air gap faucet is
clogged.
Clear or replace air gap faucet.
Check valve on the reverse
osmosis membrane housing is
stuck.
Replace check valve.
The automatic shut–off valve is
malfunctioning.
Replace automatic shut–off valve.
Low Water Pressure From Dispensing Faucet
Possible Cause
Solution
Air pressure in holding tank is
incorrect.
This is the #1 reason for low flow
from reverse osmosis faucet.
Open faucet and empty water from holding tank. Shut off feedwater to system
and remove holding tank from under sink. (The tank is easier to work on.)
Locate the air valve stem (just like on a car or bicycle tire) and add air. If there
is still water in the tank, continue to add air until all the water is removed.
Once all the water is removed, continue to add air and pressurize to 8 PSI.
Re–install the tank under the sink, turn on the feed supply to the system and
allow the tank to fill.
Carbon post filter is clogged.
Replace post filter
Holding tank valve is partially
closed.
Open valve.
The faucet is out of adjustment or
faulty.
Repair or replace faucet.
Heavy water use. Holding tank is
empty.
Allow holding tank to refill.
12
TROUBLESHOOTING
