Endress+Hauser Levelflex FMP54 - Diagnostics and Troubleshooting; General Trouble Shooting

Levelflex FMP51, FMP52, FMP54 FOUNDATION Fieldbus Diagnostics and troubleshooting
Endress+Hauser 123
13 Diagnostics and troubleshooting
13.1 General trouble shooting
13.1.1 General errors
Error Possible cause Remedial action
Device does not respond. Supply voltage not connected. Connect the correct voltage.
The cables do not contact the
terminals properly.
Ensure electrical contact between the
cable and the terminal.
Values on the display
invisible
Contrast setting is too weak or too
strong.
• Increase contrast by pressing  and
 simultaneously.
• Decrease contrast by pressing  and
 simultaneously.
The plug of the display cable is not
connected correctly.
Connect the plut correctly.
Display is defective. Replace display.
"Communication error" is
indicated on the display when
starting the device or
connecting the display
Electromagnetic interference Check grounding of the device.
Broken display cable or display plug. Exchange display.
CDI communication does not
work.
Wrong setting of the COM port on
the computer.
Check the setting of the COM port on
the computer and change it if necessary.
Device measures incorrectly. Parametrization error Check and adjust parameterization.