Diagnostics and troubleshooting Liquiline CM442/CM444/CM448
120 Endress+Hauser
11.1.3 Device-specific errors
11.2 Diagnostic information on the local display
Up-to-date diagnostic events are displayed along with their status category, diagnostic code and
short text. Clicking on the Navigator lets you retrieve more information and tips on remedial
measures.
11.3 Diagnostic information via web browser
The same information as for the onsite display is available via the web server.
11.4 Diagnostic information via fieldbus
Diagnostic events, status signals and more information are transmitted according to the
definitions and technical capability of the respective fieldbus systems
Problem Possible cause Tests and/or remedial measures
Dark display No supply voltage Check if supply voltage applied.
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.
Implausible measured
values
Inputs defective First perform tests and take measures as outlined in
"Process-specific errors" section
Measuring input test:
– Connect the Memocheck Sim CYP03D to the
input and use this to test its function.
Current output, incorrect
current value
Incorrect adjustment Check with integrated current simulation, connect
mA meter directly to current output.
Load too large
Shunt / short to ground in current
loop
No current output signal Base module defective Check with integrated current simulation, connect
mA meter directly to current output.
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