Diagnostics And Troubleshooting; General Trouble Shooting; General Errors - Endress+Hauser Levelflex FMP56 Operating Instructions Manual

Diagnostics and troubleshooting

94
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
Duplicating of the parameters
from one device to another via
the display doesn' t work.
Only the "Save" and "Abort"
options are available.
Output current <3.6 mA
HART communication does not
function.
CDI communication does not
work.
Device measures incorrectly.
Device not accessible via
SmartBlue
Login via SmartBlue not
possible
Device cannot be operated via
SmartBlue
Possible cause
Supply voltage does not match
the value indicated on the
nameplate.
The polarity of the supply
voltage is wrong.
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.
Display with backup is not
recognized if no data backup
has been performed at the
device before.
Signal cable connection
incorrect.
Electronics is defective.
Communication resistor
missing or incorrectly installed.
Commubox connected
incorrectly.
Commubox not switched to
HART mode.
Wrong setting of the COM port
on the computer.
Parametrization error
No Bluetooth connection
Device already linked to
another smartphone / tablet
Bluetooth module not
connected.
Device is being put into
operation for the first time
Incorrect password entered
Password forgotten
Levelflex FMP56, FMP57 HART
Remedial action
Connect the correct voltage.
Correct the polarity.
Ensure electrical contact between the cable
and the terminal.
• Increase contrast by pressing  and 
simultaneously.
• Decrease contrast by pressing  and 
simultaneously.
Connect the plug correctly.
Replace display.
Check grounding of the device.
Replace display.
Connect display (with the backup) and
restart the device.
Check connection.
Replace electronics.
Install the communication resistor(250 Ω)
correctly.
Connect Commubox correctly.
Set the selection switch of the Commubox to
the HART position.
Check the setting of the COM port on the
computer and change it if necessary.
Check and adjust parameterization.
Enable Bluetooth function onsmartphone or
tablet.
Disconnect device from smartphone/tablet.
Connect Bluetooth module (see SD02252F).
Enter initial password (ID of the Bluetooth
module) and change.
Enter correct password
Contact Endress+Hauser Service
(www.addresses.endress.com)
Endress+Hauser