-73-
No.PS
※※
-OMW0005-A
○Troubleshooting list
Problem
No.
Problem
Problem possible
causes
Investigation method
Countermeasures
1
•The switch
output does not
turn OFF.
The operation
light stays ON.
•The switch
output does not
turn ON.
The operation
light stays OFF.
Incorrect
pressure setting
(1) Check the set pressure value.
(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) Adjust the set pressure
value.
(2) Set the operation mode,
hysteresis and output
type again.
Product failure
Replace the product.
2
The switch
output does not
turn OFF.
The operation
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.
3
The switch
output is OFF.
The operation
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 model selection
(output specification).
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.
4
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
pressure setting
(1) Check the set pressure value.
(2) Check if the hysteresis range is
small.
(3) Check the delay time setting.
Check if the delay time is too
short.
(1) Adjust the set pressure
value.
(2) Make the hysteresis
wider.
(3) Set the delay time again.
Product failure
Replace the product.
5
The switch
output response
is slow.
Incorrect
pressure setting
Check the set pressure value.
Check if the detected pressure and
the set pressure values are the same
or are too close.
Adjust the set pressure
value .Ensure the set
pressure value is not too
close to the detected
pressure value.