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Chapter6 Troubleshooting
F3SJ-A
User’s Manual
Appendix
*2 When an error occurred, a supply voltage error may be recorded in addition to the original error
code if supply voltage is out of specification range.
Problem under other state than lockout
Shown below are actions to take when F3SJ does not work properly while no lockout occurred or no
error code is displayed.
•Light intensity level indicators do not turn ON even if a beam receives light, while only the power
indicator and OFF output indicator are being turned ON
Error code
other than
those above
Effect of noise. Effect of noise is excessive. Check the noise level in the
surrounding environment.
Lockout of other
F3SJ in the series
connection
Failure occurred in another F3SJ
under series connection.
Solve the problem of F3SJ in a
series connection.
Failure of F3SJ's
internal circuit.
F3SJ's internal circuit is damaged. Replace the F3SJ.
Emitter
Receiver
Cause Action
Beam is misaligned. Adjust the beam so that it should receive light. A
beam will not receive light if its installation
surface is tilted or its height is misaligned.
If the beam still does not receive light after
adjustment, detach the F3SJ from installation
surface, set an emitter and a receiver face to
face, and check if the beam receives light.
p.83
Test input is being applied. Check if the test indicator is blinking. If it is
blinking, set the test input OFF or open.
Detection surface of an emitter or a receiver is
dirty.
Clean the surface.
Emitter
Receiver
Error code Error Description Cause Solution
A
B
C
A
B
ON OFF
ON, blink, or OFF
depending on the setting
POWER
LOCKOUT
EDM
TEST
ERRO R
A
B
C
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