Diagnostics and troubleshooting Deltabar FMD71, FMD72
68 Endress+Hauser
"M" messages
Diagnostic event Cause Corrective measure
Code Description
M002 Sens. unknown Sensor module does not suit the device (electronic
sensor module nameplate). Device continues
measuring.
Contact Endress+Hauser
Service
M283 Memory
content
• Cause as indicated for F283.
• Correct measurement can continue as long as you do
not need the peakhold indicator function.
• Perform a reset
• Replace electronics
M431 Adjustment The adjustment performed would cause the sensor
nominal range to be exceeded or undershot.
• Check the measuring
range
• Check position
adjustment
• Check the setting
M434 Scaling • Values for adjustment (e.g. lower range value and
upper range value) are too close together.
• Lower-range value and/or upper-range value exceed
or fall below the range limits of the sensor.
• The sensor was replaced and the customer-specific
configuration does not suit the sensor module.
• Unsuitable download carried out.
• Check the measuring
range
• Check the setting
• Contact Endress+Hauser
Service
M438 Data set • The supply voltage is disconnected when writing.
• An error occurred when writing.
• Check the setting
• Restart device
• Replace electronics
"C" messages
Diagnostic event Cause Corrective measure
Code Description
C412 Backup in prog. Downloading. Wait for download to
complete.
C482 Simul. output Simulation of the current output is switched on, i.e. the
device is not measuring at present.
End the simulation
C484 Error simul. Fault state simulation is switched on, i.e. the device is
not measuring at present.
End the simulation
C824 Process pressure • Electromagnetic effects outside the permitted range.
This message appears for a short time only.
• Overpressure or low pressure present.
• Check the pressure value
• Restart device
• Perform a reset
"S" messages
Diagnostic event Cause Corrective measure
Code Description
S110 Operational
range T
• Electromagnetic effects outside the permitted
range.
• Sensor module defective.
• Check the process pressure
• Check the temperature
range
S140 Working range P
LP/HP
• Overpressure or low pressure present.
• Electromagnetic effects outside the permitted
range.
• Sensor module defective.
• Check the process pressure
• Check the pressure value
S822 Process temp.
LP/HP
• The temperature measured in the sensor module
is greater than the upper nominal temperature
of the sensor module.
• The temperature measured in the sensor module
is smaller than the lower nominal temperature
of the sensor module.
• Check temperature
• Check the setting
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