Endress+Hauser Liquiline CM442R - Diagnostics and Troubleshooting; General Troubleshooting

Liquiline CM442R/CM444R/CM448R Diagnostics and troubleshooting
Endress+Hauser 115
11 Diagnostics and troubleshooting
The color of the display background changes to red if a diagnostics message for error category
"F" occurs.
11.1 General troubleshooting
11.1.1 Troubleshooting
A diagnostic message appears on the display or via the fieldbus, measured values are not
plausible, or you identify a fault.
1. See the Diagnostics menu for the details on the diagnostic message.
 Follow the instructions to rectify the problem.
2. If this does not help: Search for the diagnostic message under "Overview of diagnostic
information" ( ä 119) in this manual. Use the message number as a search criterion.
Ignore the letters indicating the Namur error category.
 Follow the troubleshooting instructions provided in the last column of the error tables.
3. If the measured values are implausible, the onsite display is faulty or you encounter other
problems, search for the faults under "Process errors without messages" or "Device-specific
errors".
 Follow the recommended measures.
4. Contact the Service Department if you cannot rectify the error yourself. Only cite the error
number.
11.1.2 Process errors without messages
See Operating Instructions for "Memosens", BA01245C
11.1.3 Device-specific errors
Problem Possible cause Tests and/or remedial measures
Dark display
(only with
optional display)
No supply voltage Check if supply voltage applied.
Display connector plugged in
incorrectly
Check. Must be in RJ45 socket on base module.
Base module defective Replace base module
Values appear on display
but:
– Display does not
change and / or
– Device cannot be
operated
Module not wired correctly Check modules and wiring.
Impermissible operating system
condition
Switch off device and switch it on again.