Diagnostics And Troubleshooting; General Trouble Shooting; General Errors - Endress+Hauser Levelflex FMP55 Operating Instructions Manual

Diagnostics and troubleshooting

98
13 Diagnostics and troubleshooting
13.1

General trouble shooting

13.1.1

General errors

Error
Device does not respond.
Values on the display
invisible
"Communication error" is
indicated on the display when
starting the device or
connecting the display
CDI communication does not
work.
Device measures incorrectly.
Levelflex FMP55 FOUNDATION Fieldbus
Possible cause
Supply voltage not connected.
The cables do not contact the
terminals properly.
Contrast setting is too weak or too
strong.
The plug of the display cable is not
connected correctly.
Display is defective.
Electromagnetic interference
Broken display cable or display plug.
Wrong setting of the COM port on
the computer.
Parametrization error
Remedial action
Connect the correct voltage.
Ensure electrical contact between the
cable and the terminal.
• Increase contrast by pressing  and
 simultaneously.
• Decrease contrast by pressing  and
 simultaneously.
Connect the plut correctly.
Replace display.
Check grounding of the device.
Exchange display.
Check the setting of the COM port on
the computer and change it if necessary.
Check and adjust parameterization.
Endress+Hauser