106
Chapter
6
T
roub
le
shoo
ting
F3SJ-A
User’s Manual
Appendix
Troubleshooting
Lockout State
When a sensor enters lockout, the error mode indicator for the emitter or receiver in which the error
occurs turns ON or blinks to indicate the error details.
Solve the problems based on the table below.
Error mode indicator
Description
Cause
Solution
Interlock wiring error
The reset input line and interlock
selection input line are not properly
wired.
Check that wiring has been made for
auto reset or manual reset.
The interlock selection input line is
broken or short-circuited.
External device
monitoring error
Relay is welded.
Replace the relay.
The relay and external device
monitoring input line are not properly
wired.
Check the wiring for the relay.
The relay response time exceeds the
allowable delay time.
Replace the relay with one that has
an appropriate response time.
If short-circuit is made to an auxiliary
output instead of a relay, the auxiliary
output line is broken or short-
circuited.
Make sure there is no failure in the
external device monitoring input and
auxiliary output lines.
Safety output error
The safety output lines are short-
circuited to each other.
Wire the output lines properly.
The safety output line and 24V, 0V, or
other input/output line are short-
circuited.
Failure of safety output circuit.
Replace the receiver.
Series connection
cable error
A series connection cable connector
is detached or broken.
Replace the series connection cable.
Noise or sensor
failure
Effect of noise is excessive.
Check the noise level in the
surrounding environment.
Sensor's internal circuit is damaged.
Replace the sensor.
Model error/ Series
connection error
The models of the emitter and
receiver in a set are different. (Ex.:
Different number of beams)
Connect the appropriate models.
The number of sensors in series
connection does not match. Ex.:
Power is turned ON with 2 receivers
and 1 emitter)
OFF
Blinking
ON
A
B
C
A
B
C
A
B
C
A
B
C
A
B
C
A
B
C
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