Diagnostics and troubleshooting Liquiline CM442R/CM444R/CM448R
120 Endress+Hauser
374 Sensor check F On Off No measurement signal from sensor
-> Check the sensor connection
-> Check sensor, replace if necessary
401 Factory reset F On On Factory reset is performed
406 Param. active C Off Off → Wait for confi guration to be finished
407 Diag. active C Off Off → Wait for maintenance to be finished
412 Writing backup F On Off → Wait for the write process to be finished
413 Reading backup F On Off → Wait
460 Output below limit S On Off Reasons
•Sensor in air
• Air pockets in assembly
• Sensor fouled
• Incorrect flow to sensor
Measures
1. Check sensor installation
2. Clean the sensor
3. Adjust assignment of current outputs
461 Output above limit S On Off
462 Output Deviation S On Off When the current output is read back, the value
deviates from the target value displayed.
Possible reasons: Current load outside
specification, short-circuit or open current loop,
module defective
1. Check installation of current loop
2. Check module
3. Contact the Service Department
502 No text catalog F On On → Contact the Service Department
503 Language change M On Off Language change failed
→ Contact the Service Department
530 Logbook at 80% M On Off 1. Save the logbook to the SD card and then
delete the logbook in the device
2. Set memory to ring memory
3. Deactivate logbook
531 Logbook full M On Off
532 License error M On Off → Contact the Service Department
540 Parameter save fail M On Off Configuration saving has failed, → repeat
541 Parameter load ok M On Off Configuration successfully loaded
542 Parameter load fail M On Off Configuration loading has failed, → repeat
543 Parameter load abort M On Off Configuration loading aborted
544 Parameter reset ok M On Off Factory default successful
910 Limit switch S On Off Limit switch activated
No. Message Factory settings Tests or remedial measures
Cat. Diag.
on/off
Error
current
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