To Next PageTo Next PageWhat 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 does Limit High Li.h1 mean on Watlow ez-zone pm Controller?
If your Watlow Controller displays a 'Limit High Li.h1' error, it could be due to: * The temperature being greater than the limit set point; check the cause of the over temperature. * The limit outputs latching and requiring a reset; clear the limit. * An incorrect alarm set point; establish the correct limit set point.
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.
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.
Why won’t my Watlow ez-zone pm Controller limit clear or reset?
If the limit on your Watlow Controller won't clear or reset, consider these possible causes: * The sensor input might be out of the limit set point range; correct the cause of the sensor input being out of range. * The limit set point might be incorrect; set the limit set point to the correct trip point. * The digital input function might be incorrect; set the digital input function and source instance.
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.
Why does my Watlow ez-zone pm have no display?
If your Watlow Controller's display is blank, several factors could be the cause: * The controller might not be receiving power, so ensure it is turned on. * A fuse may have blown, requiring replacement. * The breaker could be tripped, needing a reset. * The safety interlock switch might be open, requiring closure. * A separate system limit control could be activated, requiring a reset. * There may be a wiring issue that needs correction. * The controller might be receiving incorrect voltage, so verify and apply the correct voltage, checking the part number to confirm.
Why is my Watlow Controller temperature running away?
A temperature runaway in your Watlow Controller can stem from several issues: * The controller output may be incorrectly programmed; verify that the output function is correct (heat or cool). * The thermocouple might be reverse wired; correct the sensor wiring, ensuring the red wire is negative. * The controller output might be wired incorrectly; verify and correct the wiring. * There could be a short in the heater; replace the heater. * The power controller connection to the controller may be defective; replace or repair the power controller. * The controller output might be defective; replace or repair the controller.
How to fix a Watlow ez-zone pm when the process doesn’t control to set point?
If the process isn't controlling to the set point on your Watlow Controller, it could be due to a few reasons: * The controller might not be tuned correctly. Perform autotune or manually tune the system. * The control mode might be incorrectly set. Ensure it's set appropriately (Open vs Closed Loop). * The control set point might be incorrect. Set it correctly in the appropriate control mode and check the source of the set point: remote, idle, profile, closed loop, open loop.
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.
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.
