Endress+Hauser Levelflex FMP53 - Trouble shooting; Trouble-shooting instructions; Generel errors

Trouble shooting Levelflex FMP51, FMP52, FMP54
84 Endress+Hauser
11 Trouble shooting
11.1
Trouble-shooting instructions
Generel errors
Error Possible cause Remedial action
Device does not respond. Supply voltage does not match the value
indicated on the nameplate.
Connect the correct voltage.
The polarity of the supply voltage is
wrong.
Correct the polarity.
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 O and F
simultaneously.
•
Decrease contrast by pressing S and F
simultaneously.
The plug of the display cable is not
connected correctly.
Connect the plut correctly.
Display is defective. Replace 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 parameterization and adjust it if
necessary (see table below).
Parametrization errors for level measurements
Error Possible cause Remedial action
Measured value wrong
If measured distance(Setup ®
Distance) matches the real distance:
Calibration error
• Check the Empty calibration
parameter and adjust it if
necessary(® ä 119).
•
Check the Full calibration parameter
and adjust it if necessary (® ä 120).
• Check linearization and adjust it if
necessary (® ä 137).
If measured distance(Setup ®
Distance) does not match the real
distance:
An interference echo affects the
measurement.
Perform mapping (interference echo
suppression) (® ä 124).
No change of the measured
value when emptying/filling
the tank
An interference echo affects the
measurement.
Perform mapping (interference echo
suppression) (® ä 124).
Build-up at the probe. Clean the probe.
Diagnostic event F941 or S941
"Echo lost" appears after
switching on the supply voltage.
Echo threshold too high. Check the Medium group parameter
(® ä 119).
If necessary select a more detailed setting in
the Medium property parameter
(® ä 128).
Level echo suppressed. Ausblendung löschen und gegebenenfalls
neu aufnehmen.
Device displays a level when
the tank is empty.
Incorrect probe length Carry out probe length correction
(® ä 145).