Kenmore ULTRAFILTER 300 625.384720 - Manual (Page 15)

CARE OF YOUR REVERSE OSMOSIS SYSTEM
REVERSE OSMOSIS SYSTEM CARE GUIDE
MODEL NOs. 625.384720 & 625.384750
1. AT LEAST every 6 months, replace the prefilter and postfilter cartridges or when yellow LED flashes.
2. Replace the RO membrane cartridge when the percent rejection of total dissolved solids (JDS) is less than shown
in the specifications (see B, below) or when red LED flashes.
3. Replace the batteries once per year.
If any of the following occur before the 6 months, replace as directed.
A. Slow Making ofProciuct Water: Replace the prefilter cartridge.
If the production rate does not improve, replace the post filter car­
tridge and RO membrane cartridge.
C. Chiorfne Taste an0orOcior: Replace the prefilter, postfi Iter and
RO membrane cartridges.
B. High Tota! Dfssolvecf Solids (TDS) in Product Water: You can
get a free TDS test through some Sears retail stores or service
departments. If the store or service department does not have a
TDS meter, you can send treated and untreated water samples to
a water analysis lab for testing. It is important to test both the
treated and untreated waterto determine system performance. If
the TDS is not within the system’s performance guidelines,
replace the prefilter, post filter and RO membrane cartridges.
PROBLEM CAUSE CORRECTION
Chlorirm taste andfor
odor in the RO product
water
The ppm of chlorine in your water supply
exceeds maximum limits, and has de­
stroyed the RO membrane.
If the watersupply contains more than 2.0 ppm of chlorine, addi­
tional filtering of the water supply to the RO is needed. Correct
this condition before doing maintenance on the RO system.
Replace the prefilter, post filter and RO membrane cartridges.
The prefilter is no longer removing chlo­
rine from the water supply.
Other taste andfor odor Post filter expended. Replace the post filter cartridge. If taste and odor persists, re­
place the prefilter cartridge and RO membrane cartridge.
RO membrane cartridge expended.
Contamination in product water storage. Use sanitizing procedures. Replace the post filter cartridge.
System makes product
water too slowly
Watersupply to the RO system not within
specifications.
Increase water pressure, precondition the water, etc., as needed
to conform before doing maintenance on the RO system.
Prefilter or RO membrane cartridges
plugged with sediments. Replace the prefilter cartridge. If rate does not increase, replace
the postfilter cartridge and RO membrane cartridge.
System makes lower
anjount of product water
than usual
Storage tank air-charge less than 5-7
psi.
Open RO faucet and drain tank until flow slows to a drip. Keep
faucet openandchecktank pressu re. If low, pressu rize to S psi.
Close faucet to refill the tank.
High tota! dissolved sol­
ids {TDS} in product wa­
ter - flashing red LED Watersupply to the RO system not within
specifications.
Increase water pressure, precondition the water, etc., as needed
to conform before doing maintenance on the RO system.
RO membrane cartridge expended. Replace the prefilter, postfilter and RO membrane cartridges,
flow control, and screen.
Wafer leaking from fau­
cet airgap hole
Drain side of faucet airgap (3/8” tubing)
plugged, restricted, or incorrectly con­
nected to drain point. Inspect and eliminate restriction or plug. Refer to installation
instructions for proper drain connection.
Continual water flow to
drain
Check valve or automatic shutoff assem­
bly plugged, restricted or parts worn Clean, repair or replace as needed.
Faucet LED Indicator
light does not function af­
ter battery change
Batteries dead. Replace with new batteries.
Batteries installed incorrectly. Install batteries correctly.
Static protection device was not dis­
charged.
Remove batteries fora minimum or one hour and then reinstall.
Continual water flow to
drain and no product wa­
ter
Missing flow restrictor in red drain tube or
its corresponding port. Replace flow restrictor.
Noie: Sanitizing is recommended after servicing inner parts of the system (see page 9).
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Problems, Questions? Call 1 -800-426-9345 Kenmore Water Line