Diagnostics and troubleshooting Waterpilot FMX21
66 Endress+Hauser
Diagnostic event Reason Corrective measure
Code Description
F283 Memory content • Main electronics defective.
• Electromagnetic effects are greater than
specifications in the technical data.
• The supply voltage is disconnected when writing.
• An error occurred when writing.
Perform a reset
F411 Up-/download • File is defective.
• During the download, the data are not correctly
transmitted to the processor, e.g. because of open
cable connections, spikes (ripple) on the supply
voltage or electromagnetic effects.
• Repeat download
• Use other file
• Perform a reset
F510 Linearization The linearization table is being edited. • Conclude entries
• Select "linear"
F511 Linearization The linearization table consists of less than 2 points. • Table too small
• Correct table
• Activate table
F512 Linearization The linearization table is not monotonic increasing or
decreasing.
• Table not monotonic
• Correct table
• Activate table
F841 Sensor range • Overpressure or low pressure present.
• Faulty sensor.
• Check the pressure value
• Contact Endress+Hauser
Service
F882 Input signal External measured value is not received or displays a
failure status.
• Check the bus
• Check source device
• Check the setting
"M" messages
Diagnostic event Reason Corrective measure
Code Description
M002 Sens. unknown Sensor does not suit the device (electronic sensor
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
M431 Adjustment The calibration carried out would result in values that
exceed or fall below the nominal range of the sensor.
• Check the measuring
range
• Check position
adjustment
• Check the setting
M434 Scaling • Values for calibration (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 the device
M882 Input signal External measured value displays a warning status. • Check the bus
• Check the source device
• Check the setting
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