SMC Networks PF3W7 Series, Operation Manual

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-64-
No.PF
※※
-OMM0005-N
Troubleshooting
Troubleshooting
Applicable Flow switch: PF3W7 series
If an operation failure occurs with the product, use the chart below to find out the cause of problem.
If a cause applicable to the failure cannot be identified and normal operation can be recovered by
replacement with a new product, this indicates that the product
itself was faulty. The damage to the product
may have been caused by operating environment (network construction, etc.). Consult with SMC separately
to obtain countermeasures.
Cross-reference for troubleshooting
Fault Detail Possible cause Item to check Recommended action
Incorrect
display
No display
Incorrect wiring
Check if the brown wire DC(+) and blue
wire DC(-) are connected correctly.
Correct the wiring.
Loose connector Check that the connector is connected. Connect the connector.
The display
is unstable.
Foreign matter
has entered or got
stuck inside the
flow passage of
the sensor.
Confirm whether foreign matter may
enter.
We recommend a filter with
filtration of approx. 40
mesh.
Piping is
connected in the
wrong direction. Confirm whether the mounting direction
of the product corresponds to the flow
direction. Make the mounting
direction correspond to the
flow direction.
Insufficient water
supply
Confirm whether the fluid path is full. Fill up the fluid path.
Pulsation in the
flow.
Confirm whether the supply pressure
fluctuates, or whether pulsation is
generated due to the characteristics of
the compressor or pump used as the
pressure source.
Change to a pump that has
less pulsation. Install a tank
to reduce the pressure
fluctuation. Change the
piping to elastic piping such
as rubber hose.
Incorrect
display
Foreign matter
has entered or got
stuck inside the
flow passage of
the sensor.
(1) Confirm whether foreign matter may
enter.
(2) Confirm whether any foreign matter
has got stuck inside.
We recommend a filter with
filtration of approx. 40
mesh.
Remove foreign matter.
Piping is
connected in the
wrong direction. Confirm whether the mounting direction
of the product corresponds to the flow
direction. Make the mounting
direction correspond to the
flow direction.
Insufficient water
supply
Confirm whether the fluid path is full. Fill up the fluid path.
Liquid leakage
Check for liquid leaks due to insufficient
tightening of the screw at the piping
and/or improper sealing.
Tighten to the specified
torque when piping and/or
apply the seal tape once
again.
Flow does
not start.
The flow
adjustment valve
is closed.
Check the condition of the flow
adjustment valve.
Open the flow adjustment
valve to get appropriate
flow.