Troubleshooting
Leuze electronic
MLC 520 EX
48
E23
Interference detected on plug
pin 4. Signal output: output signal
is not equal to the signal input
read-back value: it switches simul
-
taneously with the other signal
line.
Check the wiring.
Automatic reset
E24
Interference detected on plug
pin 8. Signal output: output signal
is not equal to the signal input
read-back value: it switches simul
-
taneously with the other signal
line.
Check the wiring.
Automatic reset
E30
EDM does not open
Actuate the start button if avail
-
able.
Locking
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
selected operating mode, correct
the operating mode if required, and
restart.
Locking
E38
Restart interlock operating mode
changed during operation
Check the correctness of the
selected operating mode, correct
the operating mode if required, and
restart.
Locking
E39
Actuation duration (2.5 min)
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 volt
-
age polarity during operation
Check the wiring and programming
of the device which controls this
signal.
Locking
E80 … E86
Invalid operating mode due to set
-
ting 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
Faults
Cause/description
Measures
Sensor behav
-
ior
