Leuze electronic MLC 520 - LED indicators at the receiver - causes and measures; Error messages 7-segment display

Troubleshooting
Leuze electronic MLC 520 47
Tab.11.2: LED indicators at the receiver - causes and measures
LED State Cause Measure
LED1 OFF Device failed Replace the device.
Red
(7-segment display
during start-up: “C1”
or “C2” according to
the number of green
LEDS on the trans-
mitter)
Alignment incorrect or pro-
tective field interrupted
Remove all objects from the protective
field. Align the transmitter and receiver to
each other or place blanked objects cor-
rectly concerning size and position.
Red
(7-segment display
during start-up: “C1”.
LEDs on transmitter:
both green)
Receiver is set on C1,
transmitter on C2
Set the transmitter and receiver on the
same transmission channel and align both
correctly.
Red
(7-segment display
during start-up: “C2”.
LED1 on transmitter:
green)
Receiver is set on C2,
transmitter on C1
Remove all objects from the protective
field. Align the transmitter and receiver to
each other or place blanked objects cor-
rectly concerning size and position.
red, slowly flashing,
approx.1Hz
(7-segment display
“Exy”)
External fault Check the connection of the cables and
the control signals.
red, flashing fast, ap-
prox.10Hz
(7-segment display
“Fxy”)
Internal fault If restart fails, exchange the device.
Green, slowly flash-
ing, approx.1Hz
Weak signal due to contami-
nation or poor alignment
Clean the front screens and check the
alignment of transmitter and receiver.
LED2 Yellow Start/restart interlock is
locked and protective field is
free - ready for unlocking
If there are no people in the danger zone,
operate the reset button.
Flashing yellow The control circuit is open in
operating mode1,2 and3
Close the input circuit with the correct po-
larity and timing.
11.3 Error messages 7-segment display
Tab.11.3: Messages of the 7-segment display (F:internal device error, E:external error, U:usage info during appli-
cation errors)
Error Cause/description Measures Sensor behavior
F[No. 0-255] Internal fault In the event of an unsuccessful
restart, contact customer service.
OFF Very high overvoltage (± 40V) Supply the device with the correct
voltage.
E01 Cross connection between
OSSD1 and OSSD2
Check the wiring between OSSD1
and OSSD2.
Automatic reset
E02 Overload on OSSD1 Check the wiring or exchange the
connected component (reducing
the load).
Automatic reset