SMC Networks ZSE20(F) ISE20 Manual page 57

○Troubleshooting list
Problem
Problem
No.
•The switch
output does not
turn OFF.
The operation
light stays ON.
1
•The switch
output does not
turn ON.
The operation
light stays OFF.
The switch
output does not
2 turn OFF.
The operation
light is normal.
The switch
output is OFF.
3
The operation
light is normal.
The switch
4 output generates
chattering.
The switch
5 output response
is slow.
Problem possible
causes
(1) Check the set pressure value.
(2) Check the settings of the
operation mode, hysteresis and
Incorrect
output type.
pressure setting
(In hysteresis mode or window
comparator mode, and normal
output/ reversed output)
Product failure
Check the output wiring.
Incorrect wiring Check if the load is directly
connected to DC(+) or DC(-).
Product failure
Check the output wiring.
Incorrect wiring Check if the load is directly
connected to DC(+) or DC(-).
Check if PNP output is used when
Model selection NPN should have been selected, or
the other way around.
Check if there is bending stress
applied to any part of the lead wire.
Lead wire broken
(bending radius, tensile force to the
lead wire)
Product failure
Check the wiring.
Check if the brown and blue wires are
Incorrect wiring connected to DC(+) and DC(-)
respectively, and if the output line is
secure (contact failure).
(1) Check the set pressure value.
(2) Check if the hysteresis range is
Incorrect small.
pressure setting (3) Check the delay time setting.
Check if the delay time is too
short.
Product failure
Check the set pressure value.
Incorrect Check if the detected pressure and
pressure setting the set pressure values are the same
or are too close.
-56-
Investigation method Countermeasures
(1) Adjust the set pressure
value.
(2) Set the operation mode,
hysteresis and output
type again.
Replace the product.
Check and correct the
wiring.
Replace the product.
Check and correct the
wiring.
Revise the model selection
(output specification).
Correct the wiring.
(Reduce the tensile force or
increase the bending
radius.)
Replace the product.
Correct the connection on
the power cord and the plug.
(1) Adjust the set pressure
value.
(2) Make the hysteresis
wider.
(3) Set the delay time again.
Replace the product.
Adjust the set pressure
value .Ensure the set
pressure value is not too
close to the detected
pressure value.
No.PS※※-OMS0007-D