Troubleshooting Cerabar M, Deltabar M, Deltapilot M / 4...20 mA HART
94 Endress+Hauser
F283 Permanent mem. – 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.
1. Perform a reset
2. Replace electr.
F411 Up-/download – The file is defective.
– During the download, the data are not
correctly transmitted to the processor,
e.g. because of open cable connections,
voltage peaks (ripple) on the supply
voltage or electromagnetic effects.
1. Download again
2. Use another file
3. Perform a reset
F510 Linearization – The linearization table is being edited. 1. Conclude entries
2. Select "linear"
F511 Linearization – The linearization table consists of less
than 2 points.
1. Table too small
2. Corr. table
3. Accept the table
F512 Linearization – The linearization table is not monotonic
increasing or decreasing.
1. Tab. not monotonic
2. Corr. table
3. Accept the table
F841 Sensor range – Overpressure or low pressure present.
– Sensor defective.
1. Check the pressure value
2. Contact Endress+Hauser
Service
F882 Input signal – External measured value is not received
or displays a failure status.
1. Check the bus
2. Check source device
3. Check setting
M002 Sens. unknown – Sensor does not suit the device
(electronic sensor nameplate). Device
continues measuring.
1. Contact Endress+Hauser
Service
M283 Permanent mem. – Cause as indicated for F283.
– Correct measurement can continue as
long as you do not need the peakhold
indicator function.
1. Perform a reset
2. Replace electr.
M431 Adjustment – The pressure applied is outside the set
measuring range (but within the sensor
range).
– The calibration carried out would result
in the sensor nominal operating range
being undershot or overshot.
1. Check the measuring range
2. Check position adjustment
3. 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 undershoot or overshoot the
sensor range limits.
– The sensor was replaced and the
customer-specific configuration does
not suit the sensor.
– Unsuitable download carried out.
1. Check the measuring range
2. Check the setting
3. Contact Endress+Hauser
Service
M438 Data record – The supply voltage is disconnected
when writing.
– An error occurred when writing.
1. Check setting
2. Restart the device
3. Replace electr.
M515 Configuration Flow – Max. flow out of nominal range of
sensor
1. Recalibrate the device
2. Restart the device
M882 Input signal External measured value displays a
warning status.
1. Check the bus
2. Check source device
3. Check setting
Diagnostic
code
Error message Cause Measure
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