-90-
No.PF
※※
-OMY0005
Troubleshooting
If an operation failure of the product occurs, please confirm the cause of the troubles from the following table.
If a cause applicable to the troubles cannot be identified and normal operation can be recovered by
replacement with a new product, this indicates that the product itself was faulty. Problems with the product
may be due to the operating environment (installation etc). Please consult SMC.
●
Cross-reference for troubleshooting
Error indication
Problem Possible
causes
Investigation method
Countermeasure
•
The Auto switch
output does not
turn off.
The indicator light
stays ON
•
The switch output
does not turn on
Operation LED
stays OFF
Incorrect setting
(1) Setting check.
(2) Check the settings of the operation
mode, hysteresis and output type.
(in hysteresis mode or window
comparator mode, and normal
output/ reversed output)
(1) Perform setting again.
(2) Change the response time
setting.
Product failure
Replace the product
The output does
not turn off.
Indicator light is
normal
Incorrect wiring
Check the output wiring.
Check if the load is directly connected to
DC(+) or DC(-).
Check and correct the wiring.
Product failure
Replace the product
The output does
not turn on.
Indicator light is
normal
Incorrect wiring
Check the output wiring.
Check if the load is directly connected to
DC(+) or DC(-).
Check and correct the wiring.
Model Selection
Check if PNP output is used when NPN
should have been selected, or the other
way around.
Revise the output settings.
Lead wire broken
Check if there is bending stress applied
to any part of the lead wire.
(bending radius, tensile force to the lead
wire)
Correct the wiring.
(Reduce the tensile force or
increase the bending radius.)
Product failure
Replace the product
The switch output
generates
chattering.
Incorrect wiring
Check the wiring.
Check if the brown and blue wires are
connected to DC(+) and DC(-)
respectively, and if the output line is
secure (contact failure).
Correct the connection on the
power cord and the plug.
Incorrect setting
(1) Setting check.
(2) Check if the tolerance range is small.
(1) Perform setting again.
(2) Make the tolerance wider.
Product failure
Replace the product
