Trouble-shooting Levelflex M FMP40 FOUNDATION Fieldbus
92 Endress+Hauser
A251 Feedthrough Lost contact in the process feedthrough Replace process feedtrough
A261 HF cable defective HF cable defective or HF connector
removed
Check HF connector, replace cable
if defective
W275 Offset too high Temperature at the electronics too high or
HF module defective
Check temperature, replace HF
module if defective
W512 recording of mapping please
wait
mapping active wait some seconds until alarm
disappears
W601 linearisation ch1 curve not
monotone
linearization not monotonously increasing correct linearisation table
W611 less than 2 linearisation
points for channel 1
number of entered linearization points < 2 correct linearisation table
W621 simulation ch. 1 on simulation mode is active switch off simulation mode
E641 no usable echo
channel 1
check calibr.
echo lost due to application conditions of
built up on antenna
check installation;
clean probe (cf. Operating
Instructions)
W650 Signal/noise ratio too low
or no echo
noise on signal to high eliminate electromagnetic
interference
E651 level in safety distance - risk
of overspill
level in safety distance alarm will disappear as soon as level
leaves safety distance
A671 linearisation ch1 not
complete, not usable
linearisation table is in edit mode activate linearisation table
Code Description Possible cause Remedy
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