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SYSTEM TEMP LOW
This alarm indicates that the temperature inside the controller is below -10 °C.
Possible Cause
Correction Action
Low ambient temperatures
Provide heat for the controller
SYSTEM TEMP HIGH
This alarm indicates that the temperature inside the controller is above 75 °C.
Possible Cause
Correction Action
High ambient temperatures
Provide cooling for the controller
DISPLAY ERROR
This alarm occurs if the user interface gets lost
Possible Cause
Correction Action
Pressing keys very quickly
Exit out of the screen and continue programming
CONTROLLER, POWER, DISPLAY, OR SENSOR BOARD ERROR
This alarm occurs if the board listed is not recognized
Possible Cause
Correction Action
Poor ribbon cable connection
Remove and reseat ribbon cable, cycle power
Faulty board
Return the controller for repair
CONTROLLER, POWER, SENSOR, DISPLAY, NETWORK OR ANALOG OUTPUT BOARD VARIANT
This alarm occurs if the type of board that is detected is not a valid type
Possible Cause
Correction Action
Poor ribbon cable connection
Reseat ribbon cable
Faulty ribbon cable
Replace ribbon cable
Faulty Board
Replace the board listed in the error message
INVALID CONTROL MODE
This alarm occurs if the programmed control mode is not possible for the installed power relay board
Possible Cause
Correction Action
The power relay board has been removed and
replaced with an incorrect model
Reinstall the correct board or reprogram the output to a valid type
for the board installed
SENSOR, DIGITAL INPUT, RELAY OR ANALOG OUTPUT DISABLED
This alarm occurs if software for that input or output did not start correctly
Possible Cause
Correction Action
The software is not functioning
If the error message clears on its own, no action is required.
If the error message persists, cycle power.
If the error message still persists, return the controller for repair.
RELAY OR ANALOG OUTPUT CONTROL FAILURE
This alarm occurs if software for that output did not run correctly
Possible Cause
Correction Action
The software is not functioning
If the error message clears on its own, no action is required.
If the error message persists, cycle power.
If the error message still persists, return the controller for repair.
FRAM FILE SYSTEM ERROR
This alarm occurs if the FRAM is not detected at power up
Possible Cause
Correction Action
The FRAM was or is not functioning
If the error message clears on its own, no action is required.
If the error message persists, cycle power.
If the error message still persists, replace the controller board.
8.0 SERVICE POLICY
Walchem controllers have a 2-year warranty on electronic components and a 1-year warranty on mechanical parts and
electrodes. See Statement of Limited Warranty in front of manual for details.
Walchem controllers are supported by a worldwide network of authorized master distributors. Contact your authorized
Walchem distributor for troubleshooting support, replacement parts, and service. If a controller is not functioning
properly, circuit boards may be available for exchange after the problem has been isolated. Authorized distributors will
provide a Return Material Authorization (RMA) number for any products being returned to the factory for repair. Re-
pairs are generally completed in less than one week. Repairs that are returned to the factory by next-day-air freight will
receive priority service. Out-of-warranty repairs are charged on a time and material basis.
