LMI LIQUITRON DP5000 Series

Questions and Answers

P
piercelindseyAug 13, 2025
What to do if LMI LIQUITRON DP5000 shows E9 FAULTY / DISCONNECTED PROBE error?
- J
  Jamie CarrollAug 13, 2025
  If your LMI Controller displays the 'E9 = FAULTY / DISCONNECTED PROBE' error, reconnect or replace the probe.
U
ufryeAug 16, 2025
What to do if LMI LIQUITRON DP5000 displays E7 CALIBRATION ERROR?
- A
  Amanda KeyAug 16, 2025
  If your LMI Controller shows an 'E7 = CALIBRATION ERROR', it means the probe is out of the manufacturer’s limits. Recalibrate the probe.
R
ronnie36Aug 20, 2025
What to do if LMI Controller displays E6 Pump A ‘LOCKOUT’ error?
- R
  robertpopeAug 20, 2025
  If your LMI Controller displays the error message 'E6 = Pump A ‘LOCKOUT’', turn the system OFF to clear the error. Also, check for any pump blockage or malfunction.
R
rhondajeffersonAug 23, 2025
What to do if LMI Controller displays E5 Pump B ‘LOCKOUT’ error?
- S
  Susan WalshAug 25, 2025
  If your LMI Controller displays the error 'E5 = Pump B ‘LOCKOUT’', turn the system OFF to clear the error. Additionally, check for pump blockage or any other malfunction.
A
arnoldloriAug 28, 2025
What to do if LMI LIQUITRON DP5000 displays E4 ALARM 2 HIGH pH error?
- C
  Courtney WallaceAug 28, 2025
  If your LMI Controller shows 'E4 = ALARM 2: HIGH pH (PUMP A)', turn the system OFF to clear the error message. You should also adjust the pH of the solution.
M
Mackenzie JohnsonAug 31, 2025
What to do if LMI LIQUITRON DP5000 Controller displays E3 ALARM 1 LOW pH error?
- F
  Frank BrooksAug 31, 2025
  If your LMI Controller displays the error 'E3 = ALARM 1: LOW pH (PUMP B)', turn the system OFF to clear the error message. You should also adjust the pH of the solution.
D
Donna LewisSep 4, 2025
What to do if LMI LIQUITRON DP5000 displays E2 FLOW SWITCH error?
- D
  Dr. Paul SmithSep 4, 2025
  If your LMI Controller displays the 'E2 = FLOW SWITCH' error, turn the system OFF to clear the error message. Also, check the flow switch.
Z
Zachary ColemanSep 8, 2025
What to do if LMI Controller displays E1 LOW LEVEL SWITCH error?
- M
  Miss Nicole FerrellSep 8, 2025
  If your LMI Controller displays the 'E1 = LOW LEVEL SWITCH' error, turn the system OFF to clear the error message. Check the low level switch as well.

Summary

SECTION 1 - INTRODUCTION

SECTION 2 - UNPACKING

SECTION 3 - INSTALLATION

3.1 PRE-INSTALLATION

Pre-installation steps and important precautions before setting up the unit.

3.2 ENVIRONMENT

Recommended environmental conditions for operating the controller.

3.3 INSTALLATION

General guidelines for installing the pH controller and associated pumps.

3.4 MOUNTING THE ELECTRONIC ENCLOSURE

Instructions and clearances for mounting the controller's main enclosure.

3.5 ELECTRICAL INSTALLATION

Details on connecting the controller to the power source and other components.

3.5.1 Electrical Connections

Specific instructions for making electrical connections to the DP5000 controller.

3.5.2 Terminal Board Signal Description

Explanation of the signals and functions for each terminal on the controller.

3.5.3 Field Wiring Instructions

Practical guidance for wiring the controller in the field, including pump and probe connections.

3.6 pH ADJUSTMENT PUMP(S)

Details on the two types of pH adjustment pump outputs and their operation.

3.7 KEYPAD AND DISPLAY

Explanation of the controller's keypad layout and display functions.

SECTION 4 - OPERATION

4.1 DEFAULT SETTINGS

How the controller operates in its default factory configuration.

4.1.1 Proportional Mode

Detailed explanation of the proportional control mode for dosing pumps.

4.1.2 ON; OFF Mode

How the controller operates using the ON/OFF control mode for dosing pumps.

4.2 ALARMS

How to set and manage alarm points and hysteresis on the controller.

4.3 CALIBRATION (VIEWING LAST CALIBRATION DATA)

How to view the parameters of the most recent pH calibration.

4.4 NEW CALIBRATION

Procedure for performing a new pH calibration on the controller.

4.5 PUMP TIMERS AND SOLENOID VALVE CONTROL TIMERS

How to configure timers for pump operation and solenoid valve control.

4.5.1 Pump Run Time

Setting the maximum duration a pump can remain active.

4.5.2 Solenoid Delay Pump Valve Time

Configuring delay timers for solenoid valve activation and duration.

4.5.3 Setting Timers

Detailed steps for setting pump and solenoid valve timers.

4.5.4 Solenoid Valve Control

Setting up delay and ON times for the solenoid valve.

4.5.5 Display Key

How to use the display key to cycle through and view controller parameters.

4.6 ADVANCED MENU

Accessing and configuring advanced settings and options for the controller.

SECTION 5 - MAINTENANCE

5.1 pH ELECTRODE AND CABLE

Maintenance procedures and common failure causes for the pH electrode and cable.

SECTION 6 - TROUBLESHOOTING

6.1 ERROR MESSAGES

Explanation of error codes displayed by the controller and how to clear them.

SECTION 7 - DP5000 SPECIFICATIONS

SECTION 8 - PROGRAM LOG

SECTION 9 - PARTS LIST

SECTION 10 - EXPLODED VIEW