CP Series Technical Manual
December 15, 2004
General Information
Page - 31
Rev. 3
Equipment Noise
Problem
Reason
Solution
1. The unit makes a
squealing noise.
The control disc is not flat on the ceramic,
causing the drain valve to flutter.
Replace the control disc,
balance piston spring and the
balance piston O-ring. You
may also want to change the
drain valves and seals.
2. The unit makes a
gurgling, hissing or
bubbling sound.
On new installations, there may be some
air trapped in the unit initially.
Air is being drawn into the plumbing.
The brine line and/or the brine valve are
not air checking.
Run through an entire cycle
to allow the air to escape.
Identify air leaks in the
plumbing and fix them.
Identify and replace the faulty
part(s).
Unit Sticks in Cycle
Problem
Reason
Solution
1. The unit sticks in
regeneration or
backwash cycle.
The regeneration flow path is plugged at
the regeneration nozzle or flow control.
The regeneration drive pawl and/or spring
is weak or broken.
There is a damaged tooth on the control
disc.
The eccentric pinion is worn.
On backwashing filters, low pressure or
poor backwashing may cause a plugged
bed.
Clean the regeneration flow
path.
Replace the regeneration
drive pawl.
Replace the control disc.
Replace the eccentric pinion
(snap fit).
Increase inlet pressure or the
frequency of backwash. Unit
may need re-bedding.
2. The unit sticks in
service cycle.
The regeneration start pawl is broken or
missing.
The control disc has a worn or missing
tooth.
Replace or install
regeneration start pawl.
Replace control disc.
