Troubleshooting
Leuze electronic
MLC 520S
45
11
Troubleshooting
11.1
What to do in case of failure?
After switching the safety sensor on, the display elements (see chapter 3.4 "Display elements") assist in
checking the correct functionality and in faultfinding.
In case of error, you can determine the error from the LED displays. With the error message you can deter-
mine the cause of the error and initiate measures to rectify it.
NOTICE
If the safety sensor responds with an error display, you will often be able to eliminate the
cause yourself!
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Switch off the machine and leave it switched off.
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Analyze and eliminate the cause of the fault using the following table.
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If you are unable to rectify the fault, contact the Leuze electronic branch responsible for you
or call the Leuze electronic customer service (see chapter 13 "Service and support").
11.2
Operating indicator of the LEDs
Tab. 11.1:
LED indicators at the transmitter - causes and measures
Operating
mode
Specifica-
tion
LED indicator
Measure
NORMAL
OPERA-
TION
EMIS-
SION
LOCKOUT
ERROR
F1:
Micropro-
cessor er-
ror
Internal error
Check the operating
conditions and any pos-
sible cause of electrical
interference, then switch
the device off and back
on again (see chapter
14 "Technical data").
F2:
Optics er-
ror
Optical scan error.
Check any possible
cause of electrical inter-
ference, then switch the
device off and back on
again.
F12:
Cascade
error
Cascade communication
error.
Check the cascade con-
nection or the mounting
of the terminator (see
chapter 6.3.2 "Mounting
cascading")
F13:
Reset er-
ror
Reset error.
Check the connection of
the RESTART SELEC-
TION pin (see chapter
8.4 "Selection of
RESTART mode and
operation").
