Troubleshooting
Leuze electronic MLC 520 49
Error Cause/description Measures Sensor behavior
E31 EDM does not close Actuate the start button if avail-
able.
Locking
E37 EDM operating mode changed
during operation
Check the correctness of the se-
lected operating mode, correct the
operating mode if required, and
restart.
Locking
E38 Restart interlock operating
mode changed during opera-
tion
Check the correctness of the se-
lected operating mode, correct the
operating mode if required, and
restart.
Locking
E39 Actuation duration (2.5min)
exceeded for reset button or
cable short circuited
Press the reset button. If the
restart is unsuccessful, check the
wiring of the reset button.
Automatic reset
E41 Invalid change of operating
mode due to reversal of the
supply voltage polarity during
operation
Check the wiring and programming
of the device which controls this
signal.
Locking
E80…E86 Invalid operating mode due to
setting error, general operating
mode change
E.g. reset button pressed during
start-up, check the circuit diagram
and the wiring and restart.
Locking
E87 Operating mode changed Check the wiring. Restart the sen-
sor.
Locking
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