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piercelindseyAug 13, 2025
What to do if LMI LIQUITRON DP5000 shows E9 FAULTY / DISCONNECTED PROBE error?
- JJamie CarrollAug 13, 2025
If your LMI Controller displays the 'E9 = FAULTY / DISCONNECTED PROBE' error, reconnect or replace the probe.
What to do if LMI LIQUITRON DP5000 shows E9 FAULTY / DISCONNECTED PROBE error?
If your LMI Controller displays the 'E9 = FAULTY / DISCONNECTED PROBE' error, reconnect or replace the probe.
What to do if LMI LIQUITRON DP5000 displays E7 CALIBRATION ERROR?
If your LMI Controller shows an 'E7 = CALIBRATION ERROR', it means the probe is out of the manufacturer’s limits. Recalibrate the probe.
What to do if LMI Controller displays E6 Pump A ‘LOCKOUT’ error?
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.
General| Type | Controller |
|---|---|
| Display | LCD |
| Output Current | 4-20 mA |
| Output | 4-20 mA |
| Input Voltage | 24V DC |
| Communication Interface | Modbus RTU |
| Protection Rating | IP65 |
| Operating Temperature | -10°C to 50°C |
| Storage Temperature | -20°C to 60°C |
Pre-installation steps and important precautions before setting up the unit.
Recommended environmental conditions for operating the controller.
General guidelines for installing the pH controller and associated pumps.
Instructions and clearances for mounting the controller's main enclosure.
Details on connecting the controller to the power source and other components.
Specific instructions for making electrical connections to the DP5000 controller.
Explanation of the signals and functions for each terminal on the controller.
Practical guidance for wiring the controller in the field, including pump and probe connections.
Details on the two types of pH adjustment pump outputs and their operation.
Explanation of the controller's keypad layout and display functions.
How the controller operates in its default factory configuration.
Detailed explanation of the proportional control mode for dosing pumps.
How the controller operates using the ON/OFF control mode for dosing pumps.
How to set and manage alarm points and hysteresis on the controller.
How to view the parameters of the most recent pH calibration.
Procedure for performing a new pH calibration on the controller.
How to configure timers for pump operation and solenoid valve control.
Setting the maximum duration a pump can remain active.
Configuring delay timers for solenoid valve activation and duration.
Detailed steps for setting pump and solenoid valve timers.
Setting up delay and ON times for the solenoid valve.
How to use the display key to cycle through and view controller parameters.
Accessing and configuring advanced settings and options for the controller.
Maintenance procedures and common failure causes for the pH electrode and cable.
Explanation of error codes displayed by the controller and how to clear them.