Programming Error - Pentair FLECK 2750 NXT Installer Manual

Installer manual Fleck 2750 NXT/NXT2 - Troubleshooting
Problem
Excessive water in brine
tank
Softener fails to draw
brine
Drain flows continuously
10.2

Programming error

If reprogramming the unit clears the error, the remaining volume may be reset to full unit
capacity (as if it had just regenerated).
• All the units in service remain in service;
• all the units in standby go to service;
• when the error appears, the unit in regeneration finishes the regeneration and goes to
service;
• no regeneration starts while the error condition remains.
When the programming problem is corrected and the error is no longer displayed (it may take
several seconds for all the units of the system to stop displaying the error), the system returns to
normal operation.
Some examples of programming errors detected are:
• valve address doubled (NXT only);
• power failure;
154 / 170
Cause
Plugged drain line flow control.
Plugged injector system.
Controller is not cycling.
Foreign material in brine valve.
Foreign material in brine line flow
control.
Drain line flow is plugged.
Injector is plugged.
Injector screen is plugged.
Line pressure is too low.
Internal valve leaks.
Cam did not cycle.
Controller is not programming
correctly.
Foreign material in valve body.
Internal valve leak.
Solution
Clean flow control.
Clean injector and screen.
Replace controller.
Replace brine valve seat and clean
valve.
Clean brine line flow control.
Clean drain line flow control.
Clean injector.
Clean screen.
Increase line pressure to 1.4 bar.
Change seals, spacers and piston
assembly.
Check drive motor and micro-
switches.
Check controller program and
positioning of controls. Replace
power head assembly if not
positioning properly.
Remove power head assembly
and inspect bore. Remove foreign
material and check valve body in
various regeneration positions.
Replace seals and piston
assembly.
Ref. MKT-IM-026 / C - 15.12.2020