Autotrol Logix 740 User Manual (English)

Questions and Answers:

C
Claudia MillerAug 21, 2025
What to do if Autotrol Logix 740 displays ERR 3?
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  wellsjohnAug 21, 2025
  If the Autotrol Control Unit displays ERR 3, it means the controller can't determine the camshaft's position and the camshaft should be rotating to find Home position. Wait two minutes for the controller to return to the Home position; an hourglass should flash on the display, indicating the motor is running. If the camshaft isn't turning, check the motor connection, wire harness connections, optical sensor, and motor gear engagement. If the camshaft turns for more than five minutes, verify the optical sensor and camshaft connections, and check for obstructions in the cam slots. If problems persist, replace the wire harness, motor, optical sensor, and controller in that order.
T
Timothy ClayAug 23, 2025
How to fix ERR 1 on Autotrol Logix 740?
- H
  Heather AlvarezAug 23, 2025
  If your Autotrol Control Unit displays ERR 1, it means the controller power has been connected, and the control is unsure of the operation's state. To resolve this, press the UP arrow to reset the control.
L
Linda WhiteAug 25, 2025
Why no water flow display on Autotrol 760 Control Unit when water is flowing?
- C
  coreydanielsAug 25, 2025
  If your Autotrol 760 controller shows no water flow display when water is flowing, first, make sure that the bypass valve is not in the bypass position. If it is, shift it to the not-in-bypass position. Then, check if the meter probe is disconnected or not fully connected to the meter housing and fully insert the probe into the meter housing. Finally, check for any restrictions in the meter turbine rotation due to foreign material in the meter. Remove the meter housing, free up the turbine, and flush with clean water to ensure the turbine spins freely. If not, replace the meter.
J
John SandersAug 27, 2025
Why does my Autotrol Logix 740 Control Unit regenerate at the wrong time?
- M
  miranda50Aug 27, 2025
  If the Autotrol Control Unit regenerates at the wrong time, the controller might be set incorrectly. Correct the time setting according to the instructions.
G
Gregory LeeAug 27, 2025
What does it mean when my Autotrol Control Unit displays four dashes?
- D
  Dr. Jaime ZimmermanAug 27, 2025
  If your Autotrol Control Unit displays four dashes (— — : — —), it indicates a power failure occurred. Press the SET button to reset the time display.
T
Todd GentryAug 29, 2025
What to do if Autotrol Control Unit will not draw brine?
- J
  Julia RussellAug 29, 2025
  If the Autotrol Control Unit is not drawing brine, it could be due to several reasons. First, check for low water pressure and adjust the setting according to the instructions. Next, inspect the drain line for any restrictions and remove them. Also, the injector might be plugged, so clean the injector and screen. If none of these steps work, the injector may be defective and require replacement. Finally, check if valve disc 2 and/or 3 are not closed, remove any foreign matter, and check the disc for closing by pushing in on the stem, replace if needed. Also, the air check valve might be prematurely closed. Put the control momentarily into brine refill, C8. Replace or repair air check if needed.
B
Brittany LongAug 31, 2025
Why is my Autotrol Logix 740 regenerant tank overflowing?
- A
  ashley56Aug 31, 2025
  If you're experiencing a regenerant tank overflow with your Autotrol Control Unit, it could be due to several reasons. First, a regenerant valve disc 1 might be held open by foreign matter; manually operate the valve stem to flush away the obstruction. Second, valve disc 2 might not be closed during regenerant draw, causing brine refill; flush out any foreign matter by manually operating the valve stem. Third, there could be an air leak in the regenerant line to the air check; check all connections for leaks. Refer to the instructions. Fourth, an improper drain control for the injector could be the issue; a drain control that is too small with a larger injector will reduce draw rates. Finally, the drain control might be clogged with resin or other debris; clean the drain control.
C
cameronamberSep 1, 2025
Why is my Autotrol Logix 740 not regenerating automatically?
- N
  Nicole SimpsonSep 2, 2025
  If your Autotrol Control Unit is not regenerating automatically, the AC adapter or motor might not be connected; ensure the power is connected. If the power is connected, the motor might be defective and require replacement.
J
John CainSep 3, 2025
How to troubleshoot ERR 2 on Autotrol Logix 740 Control Unit?
- V
  Victoria DiazSep 3, 2025
  If the Autotrol Control Unit displays ERR 2, the controller power doesn't match 50 or 60 Hz. Disconnect and reconnect the power. If the problem persists, obtain the appropriate controller or AC adapter for either 50 or 60 Hz power.
T
Tammy KingSep 6, 2025
What causes brine tank overflow in Autotrol Logix 740 Control Unit?
- J
  Jacob KennedySep 7, 2025
  If you experience a brine tank overflow with the Autotrol Control Unit, it could be due to: 1. Uncontrolled brine refill flow rate. Remove brine control to clean ball and seat. 2. Air leak in brine line to air check. Check all connections in brine line for leaks. Refer to instructions. 3. Drain control clogged with resin or other debris. Clean drain control.

Autotrol Logix 740 Specifications

General

Model	Logix 740
Category	Control Unit
Display	LCD
Programming	User-programmable
Valve Compatibility	Compatible with Autotrol valves
Cycle Time	Adjustable
Mounting	Valve mounted

Summary

LOGIX™ SERIES INSTALLER QUICK-START SHEET

Initial Power-up Procedures

Guides initial camshaft rotation and self-test sequence upon power connection.

Step-by-Step Initial Setup

Covers system size, time, day, regen time, and capacity programming.

Manual Regeneration and Cycle Control

Explains initiating, advancing, and canceling regeneration cycles.

Control Reset and Reprogramming

Steps for resetting the control to default settings.

MANUAL OVERVIEW

Guide to Manual Usage

Explains how to effectively use the manual and installer prerequisites.

Understanding Manual Icons

Defines warning and note icons used throughout the document.

EQUIPMENT INSTALLATION

Installation Safety Warnings

Crucial electrical and mechanical safety precautions for installation.

System Regeneration Cycle Overview

Details the seven cycles of a typical water conditioner regeneration.

Valve Component Identification

Illustrates and names key parts of 255 and Performa valve bodies.

Site Selection Criteria

Essential conditions for choosing an appropriate installation location.

Water and Drain Line Connections

Guidelines for connecting water supply, bypass, and drain lines.

Regenerant and Electrical Connections

Procedures for connecting the regenerant line and electrical power supply.

Valve Camshaft and Disc Operation

Explains camshaft functionality and valve disc mechanics during operation.

SYSTEM DISINFECTION

Water Conditioner Disinfection Methods

Explains why and how to disinfect water conditioners using hypochlorite.

CONTROL MODEL IDENTIFICATION

Determining 740 or 760 Control Type

How to identify the specific control model via a valve label.

GENERAL 700 SERIES CONTROLLER OPERATIONS

Controller Features Overview

Details memory retention, motor operation, and power configurations.

Variable Reserve Functionality

Explains the automatic adjustment of reserve based on water usage.

CONTROLLER DISPLAY AND INTERFACE

Understanding Display Icons

Explains the meaning and function of various controller display icons.

Keypad Button Functions

Identifies and describes the operation of each button on the controller keypad.

Regeneration Mode Operations

Covers manual and automatic regeneration initiation and cycle control.

Initial Power-Up and Setup Steps

Guides through initial power-up, startup procedures, capacity, and hardness settings.

PLACING CONDITIONER INTO OPERATION

Conditioner and FA Filter Start-Up Guide

Step-by-step instructions for bringing the conditioner online after setup.

PROGRAMMING FOR 5-CYCLE FILTER APPLICATIONS

Manganese Greensand System Setup

Specific programming for manganese greensand filters, including sizing and settings.

Calculating Regeneration Frequency

Method for determining days between regenerations based on media capacity.

Demand-Based Regeneration Configuration

Steps to set up on-demand regeneration for iron removal using 760 controllers.

ADVANCED 700 SERIES PROGRAMMING

Programming Overview and History Access

Explains accessing advanced settings, viewing history values, and resetting the control.

Level II Professional Programming

Details advanced programming menus intended for dealer use only.

VALVE SERVICE AND MAINTENANCE

Cover and Module Service

Instructions for removing/installing the valve cover and electronic control module.

Drive Motor and Optical Sensor Maintenance

Procedures for servicing the drive motor and optical sensor.

Camshaft and Spring Service

Steps for removing/installing the camshaft and valve disc spring.

Microswitch and Optional Components

Installation of microswitches and optional relays, terminal blocks, transformers.

Top Plate and Valve Disc Replacement

Guidance on removing/installing the top plate and valve discs.

PARTS AND ACCESSORIES REFERENCE

Valve Component Identification Views

Exploded views showing parts for 255 and Performa valves.

255 Valve Parts List

Detailed list of part codes and descriptions for the 255 valve.

Performa Valve Parts List

Detailed list of part codes and descriptions for Performa valves.

Logix 700 Series Controller Parts

List of part codes and descriptions for Logix 700 series controllers.

TROUBLESHOOTING GUIDE

700 Series Controller Issues

Common problems, causes, and solutions for the 700 series controller.

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