To Next PageTo Next PageHow to fix Alarm Error AL.E1 AL.E2 AL.E3 AL.E4 on Watlow Controller?
If you're seeing an Alarm Error (AL.E1 AL.E2 AL.E3 AL.E4) on your Watlow Controller, correct the wiring or replace the sensor.
What does Alarm Error AL.E1 AL.E2 AL.E3 AL.E4 mean on Watlow ez-zone pm Controller?
If your Watlow Controller displays an 'Alarm Error AL.E1 AL.E2 AL.E3 AL.E4' message, it might be caused by: * A sensor improperly wired or open; correct the wiring or replace the sensor. * An incorrect setting of the sensor type; match the setting to the sensor used. * A corrupt calibration; check the calibration of the controller.
What to do for Limit High Li.h1 on Watlow Controller?
If you are facing a Limit High (Li.h1) error on your Watlow Controller, check the cause of the over temperature.
What does Loop Open Error Lp.o1 Lp.o2 mean on Watlow Controller?
If your Watlow Controller displays a 'Loop Open Error Lp.o1 Lp.o2' message, consider the following: * The setting of Open Loop Detect Time might be incorrect; set the correct Open Loop Detect Time for the application. * The setting of Open Loop Detect Deviation might be incorrect; set the correct Open Loop Deviation value for the application. * The thermal loop might be open; determine the cause of the open thermal loop: misplaced sensors, load failure, loss of power to load, etc. * The Open Loop Detect function might not be required but is activated; deactivate the Open Loop Detect feature.
What does Loop Reversed Error Lp.r1 Lp.r2 mean on Watlow Controller?
If your Watlow Controller displays a 'Loop Reversed Error Lp.r1 Lp.r2' message, check the following: * The setting of Open Loop Detect Time might be incorrect; set the correct Open Loop Detect Time for the application. * The setting of Open Loop Detect Deviation might be incorrect; set the correct Open Loop Deviation value for the application. * The output might be programmed for an incorrect function; set the output function correctly. * The thermocouple sensor might be wired in reverse polarity; wire the thermocouple correctly (red wire is negative).
Why is my Watlow ez-zone pm not heating or cooling?
If your Watlow Controller isn't heating or cooling, consider these potential causes: * The output function might be incorrectly set, so set it correctly. * The control mode could be wrong; set it appropriately (Open vs Closed Loop). * The output wiring may be incorrect; correct it. * There might be a fault in the system, such as an open load, power issue, or blown fuse; correct the fault. * The control set point might be incorrect; set it appropriately in the correct control mode and check its source (remote, idle, profile, closed loop, open loop). * You might have the incorrect controller model for your application; obtain the correct model.
What causes Error Input Er.i1 on a Watlow ez-zone pm Controller?
The Error Input Er.i1 on a Watlow Controller can be caused by: * A sensor improperly wired or open. Correct the wiring or replace the sensor. * Incorrect sensor settings. Match the setting to the sensor used. * A corrupt calibration. Check the calibration of the controller.
How to access menus on Watlow ez-zone pm?
If menus are inaccessible on your Watlow Controller, examine the LoC settings within the Factory Page. Then, input the correct password into the ULoC setting, also found in the Factory Page.
What to do if the alarm won’t clear or reset on Watlow Controller?
If the alarm on your Watlow Controller won’t clear or reset, try resetting the alarm when the process is within the correct range. Alternatively, you can disable latching.
What does Limit Low Li.L1 mean on Watlow ez-zone pm Controller?
If your Watlow Controller displays a 'Limit Low Li.L1' error, it may indicate: * The temperature is less than the limit set point. Check the cause of the under temperature. * The limit outputs latch and require a reset. Clear the limit. * The alarm set point is incorrect. Establish the correct limit set point.
General| Model | EZ-ZONE PM |
|---|---|
| Input Types | Thermocouple, RTD, Process Voltage, Process Current |
| Output Types | Relay, SSR drive, voltage (0-10V), current (0-20mA, 4-20mA) |
| Display | LED |
| Power Supply | 100-240V AC |
| Communication Protocols | Modbus RTU, Ethernet/IP, DeviceNet |
| Agency Approvals | CE |
| Configuration | Front panel, PC software |
| Operating Temperature | 0°C to 55°C (32°F to 131°F) |
| Alarms | 4 configurable alarms with relay or logic outputs |
Explains safety symbols, notes, cautions, and warnings for safe operation.
Describes the controller's purpose, advanced PID, configuration software, and key benefits.
Provides physical dimensions and recommended panel spacing for various models.
Step-by-step instructions for mounting and connecting the controller.
Details wiring for Modbus, DeviceNet, EtherNet/IP, J1939, Profibus, and EIA-485.
Instructions for connecting the controller to a PC for configuration and monitoring.
Covers password protection, read/write lockout levels, and enabling security features.
Explains PID parameter tuning, autotune, manual tuning, and TRU-TUNE+ adaptive control.
Provides guidance on identifying and resolving common alarms, errors, and control issues.
Lists electrical, environmental, accuracy, agency approvals, and controller specifications.
