A.O. Smith Pro AOW-S400 Owner's Manual page 17

INSTALLATION GUIDE
2
Problem
Appliance Stays
In Regeneration
Excess Water In
Brine Tank
Salty Water
Controller Error
Messages
Possible Cause
Controller not attached properly.
Defective magnet disk.
Foreign object in main control valve.
Broken valve assembly. Motor running. Repair the valve assembly.
Restricted, frozen, or pinched drain
line.
Plugged brine line, brine line flow
control, or air check/draw tube.
Plugged injector assembly.
Low water pressure.
Drain line or flow control is restricted.
Brine line restricted or crimped.
Excessive amount of water in brine
cabinet.
Intermittent pressure drop from feed
source.
Brine valve drips water back to brine
tank.
Home not found.
Motor error.
Home offset.
Home latched.
Memory error.
Make sure the controller is pushed all
the way onto the cover plate.
Replace magnet disk.
Remove foreign object(s) from the
main control valve.
Remove restriction, thaw, or straighten
drain line.
Clean flow control, air check/draw
tube, and brine line. Clean any
sediment from the brine cabinet.
Clean or replace injector. Replace
entire assembly if throat removed.
Maintain minimum pressure of 30 psi
(2.1 bar).
Remove restriction.
Remove restriction, replace if crimped.
Verify correct water level relative to
salt setting. Estimated amount of
water should be 2-12". Check brine
line and fittings for loose connections.
Install check valve on the inlet water
line to the appliance (check local
plumbing codes first).
Clean brine valve housing, replace
piston assembly.
Cycle power by unplugging the
transformer and plugging it back in. It
will look for Home again. Ensure the
controller is pushed all the way onto
the cover plate.
All wires should be unplugged and
replugged, sequence is motor, sensor,
and power cord. Plug motor in and
cycle power. If it is already plugged in,
then motor wiring or the motor plug is
defective. This could also be a problem
with the computer.
Disk did not start in proper home
location. Cycle power controller will
automatically try to reset itself by
finding Home and continuing the
regeneration. Ensure the controller
is pushed all the way onto the drive
end cap.
Gear teeth are not engaged, gear is
stripped, or something is jammed in
the valve. Cycle the power to reset.
Replace controller.
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Solution
17