-18-
No. PF
※※
-OMK0004-F
Troubleshooting
Troubleshooting
If an operation failure occurs with the product, use the chart below to find out the cause of the problem.
If none of the countermeasures seem to be applicable, or a replacement product operates normally when
installed, the product may be faulty. A product can be damaged by the operating environment (system
configuration etc). If the product seems to be faulty, please contact SMC.
Faults and countermeasures
Fault
Status
Possible cause
Item to check
Countermeasure
Incorrect
output
No output
Incorrect wiring
Check that the brown, blue, black
and white wires are connected
correctly.
Correct the wiring.
Connector is
disconnected
Check the connectors.
Correct the
connector wiring.
Output is
unstable
Foreign matter has
entered the flow
passage or adhered
to the sensor
(1) Check if any foreign matter has
entered the flow passage
(2) Check if there is foreign matter
on the mesh.
Install a filter or mist
separator on the IN side.
Mounting direction of
the product and
signal output
direction do not
match
Check that the mounting direction
of the product and the analogue
voltage output direction are the
same as the flow direction.
Mounting direction of
the product, analogue
signal output direction
and fluid flow direction
should be the same.
(Refer to page
Flow is pulsing
Check if there is any supply
pressure fluctuation or pressure
pulsation due to the characteristics
of the source compressor
(or pump).
Install an accumulator
tank to reduce the
pressure fluctuation.
Change the pressure
source to one that has
less pulsation.
Vibration
Check if there is vibration in the
place where the sensor is installed.
Do not apply vibration to
the sensor.
Air leakage
Check for air leakage due to loose
piping or insufficient sealant, etc.
Reconnect the piping
with the specified
tightening torque and
re-apply the sealant
tape.
