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- CARE OF YOUR REVERSE OSMOSIS SYSTEM -
REVERSE OSMOSIS SYSTEM CARE GUIDE
MODEL NOs. 625.385700 & 625.385720
1. AT LEAST every 6 months, replace the prefilter and postfilter cartridges or when red LED flashes,
2. Replace the RO membrane cartridge when the percent rejection of total dissolved solids (TDS) isless than shown
in the specifications (see B, below).
3. Replace the battery once per year.
If any of the following occur before the 6 months, replace as directed.
A. Slow Making of Product Water: Replace the prefilter cartridge. C. Chlorine Tasteand/or Odor: Replace the prefilter, post filter and
tfthe production rate does not improve, replace the post filter car- RO membrane cartridges.
tridge and RO membrane cartridge.
B. High Total Dissolved Solids (TDS) in Product Water: You can
get a free TDS test through some Sears retail stores or service
departments, tfthe 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 water to determine system performance. If
the TDS is not within the system's performance guidelines,
replace the prefilter, post filter and RO membrane cartridges.
PROBLEM
Chlorine taste and/or
odor in the RO product
water
Other taste and/or odor
OTHER TROUBLESHOOTING
CORRECTIONCAUSE
The ppm of chlorine inyour water supply
exceeds maximum limits, and has de-
stroyed the RO membrane.
The prefilter is no longer removing chlo-
rine from the water supply.
Post filter expended.
RO membrane cartridge expended.
Contamination in product water storage.
Water supply to the RO system notwithin
specifications.
Prefilter or RO membrane cartridges
plugged with sediments.
Storage tank air-charge less than 5 - 7
psi.
tfthe water supply 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.
Replace the post filter cartridge. If taste and odor persists, re-
place the prefilter cartridge and RO membrane cartridge.
Use sanitizing procedures. Replace the post filter cartridge.
System makes product Increase water pressure, precondition the water, etc., as needed
water too slowly to conform before doing maintenance on the RO system.
Replace the prefilter cartridge. Ifrate does not increase, replace
the postfilter cartridge and RO membrane cartridge.
System makes lower Open RO faucet and drain tank until flow slows to a drip. Keep
amount of product water faucet open and check tank pressure. If low, pressurize to 6 psi.
than usual Close faucet to refill the tank.
High total dissolved sol- Water supply to the RO system notwithin Increase water pressure, precondition the water, etc., as needed
ids (TDS) in product wa- specifications, to conform before doing maintenance on the RO system,
ter RO membrane cartridge expended. Replace the prefilter, postfilter and RO membrane cartridges,
flow control, and screen.
Water leaking from fau- Drain side of faucet airgap (3/8" tubing) Inspect and eliminate restriction or plug. Refer to installation
cet airgap hole plugged, restricted, or incorrectly con- instructions for proper drain connection.
nected to drain point.
Continual water flow to Check valve or automatic shutoff assem- Clean, repair or replace as needed.
drain bly plugged, restricted or parts worn
Faucet LED indicator Batteries dead. Replace with new batteries.
light does not function af-
ter battery change Batteries installed incorrectly. Install batteries correctly.
Continual water flow to Missing flow restrictor inred drain tube or Replace flow restrictor.
drain and no product wa- its corresponding port.
ter
Faucet LED indicator Filters needreplacing. Change filters.
light flashing red
Note: Sanitizing is recommended after servicing inner parts of the system(see page 11).
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Problems, Questions? Call 1-800-426-9345 Kenmore Water Line