66 Culligan® Culligan Top Mount (CTM) Water Softeners
66 Cat. No. 01029401
PROBLEM OR SYMPTOM CHECK PROCEDURE CAUSE
Restricted or No Service Flow Either Service Inlet piston or Service Outlet
piston are not opening fully. To determine
which one, turn the pilot to position #2. Ob-
serve the flow to the drain. Cycle the pilot
to position #4 and compare the flow of wa-
ter in position #4 to the flow in position #2.
Return the pilot to position #1.
Flow should be the same for both po-
sitions but if not:
• Service Outlet piston is not open-
ing properly.
• If backwash (position #2) is higher,
then Service Inlet piston is not
responding properly.
Potentially clogged distributors or compact-
ed media bed.
Failed distributors.
Contamination of resin bed.
Check feed water pressure Water pressure is less than 35 psi.
Failure to Draw Brine/Restricted
Brine Draw
Check that the brine line is unrestricted. Restrictions will not allow the system
to draw brine.
Check water level in brine tank Failure to Refill properly. Check
“Check Procedures and Cause for
Failure to Refill”.
Check the feed water pressure. Water pressure must be a minimum of
35 psi during regeneration.
Verify the pilot is in the #3 (brine draw)
position.
If the pilot is not in the proper position
for the brine draw/slow rinse cycle, the
system will not draw brine. Check the
pilot drive assembly.
Verify there is a vacuum on the brine line. If there is a vacuum, the brine valve
should have 20 - 27 in.Hg. No vacuum
indicates:
• Drain line is too small or discharg-
ing at a level too high above the
floor.
• The pilot strainer is plugged.
• Pistons are not in the correct posi-
tion. Refer to flow table. Possibly
broken piston.
• Plugged or incorrect backwash
flow control.
• Dirty resin bed.
Place pressure gauge downstream of drain
flow control
The back pressure of drain line down-
stream of the flow control is greater
than 5 psi.
Visually inspect eductor for blockages Plugged eductor , eductor filter, or
eductor nozzle
Inspect eductor o-rings Missing or damaged eductor o-ring
Inspect brine refill elbow assembly Plugged brine refill elbow assembly
Check piston stuck or plugged
Plugged brine refill elbow filter
Check correct function of brine valve inside
the brine tank
Not working properly
Inspect eductor and refer to Table 5 on
page 17.
Incorrectly sized eductor
Check feed water pressure is always above
35 psi.
Low feed water pressure to the pilot
valve will prevent proper setting of the
pistons.
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