Kenmore 625.3847 - Manual (Page 14)

- CARE OF YOUR REVERSE OSMOSIS SYSTEM -
REVERSE OSMOSIS SYSTEM CARE GUIDE
MODEL NO. 625.384700
1. AT LEAST every 6 months, replace the prefilter and postfilter cartridges. Clean or replace the flow control and
screen.
2. Replace the RO membrane cartridge when the percent rejection of total dissolved solids fTDS) is less than shown
in the specifications (see B, below).
If any of the following occur before the 6 months, replace as directed.
A. Slow Making of Product Water: Replace the prefilter cartridge.
If the production rate does not improve, replace the post filter car­
tridge and RO membrane cartridge.
C. Chlorine Taste and/or Odor: Replace the prefilter, post filter and
RO membrane cartridges.
B. High Total Dissolved Solids (TDS) in Product Wafer; 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 water to determine system performance. If
the TDS is not within the system’s performance guidelines,
replace the prefiiter, post filter and RO membrane cartridges.
OTHER TROUBLESHOOTING
PROBLEM CAUSE CORRECTION
Chlorine
taste and/or
odor in the RO product
water
The ppm of chlorine in your water supply
exceeds maximum iimits, and has de­
stroyed the RO membrane. If the 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,
flow control, and screen.
The prefilter is no longer removing chlo­
rine from the water supply.
Other taste and/or odor Post filter expended. Replace the post filter cartridge. It taste and odor persists, re­
place the prefilter cartridge, RO membrane cartridge, flow con­
trol, and screen. RO membrane cartridge expended.
Contamination in product water storage. Use sanitizing procedures. Replace the post filter cartridge.
System makes product
water too slowly
Water supply 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 prefitter cartridge. If rate does not increase, replace
the postfllter cartridge, RO membrane cartridge, flow control,
and screen.
System makes lower
amount 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 open and check tank pressure, if low, pressurize to 6 psi.
Close faucet to refill the tank.
High total dissolved sol­
ids (TDS) in product wa­
fer
Water supply 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.
Note: Sanitizing is recommended after servicing inner parts of the system(see page 9).
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