Troubleshooting - SMC Networks PF3W3 Series Operation Manual

Troubleshooting

Troubleshooting
Applicable Flow monitor: PF3W3 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
No display
The display
is unstable.
Incorrect
display
Incorrect
display
Flow does
not start.
Even though
the flow rate
is zero, it is
displayed.
Possible cause
Check if the brown wire DC(+) and blue
Incorrect wiring
wire DC(-) are connected correctly.
Loose connector Check that the connector is connected.
Foreign matter
has entered or got
Confirm whether foreign matter may
stuck inside the
enter.
flow passage of
the sensor.
Piping is Confirm whether the mounting direction
connected in the of the product corresponds to the flow
wrong direction. direction.
Insufficient water
Confirm whether the fluid path is full.
supply
Confirm whether the supply pressure
fluctuates, or whether pulsation is
Pulsation in the
generated due to the characteristics of
flow.
the compressor or pump used as the
pressure source.
Foreign matter
has entered or got
Confirm whether foreign matter may
stuck inside the
enter.
flow passage of
the sensor.
Piping is Confirm whether the mounting direction
connected in the of the product corresponds to the flow
wrong direction. direction.
Insufficient water
Confirm whether the fluid path is full.
supply
The flow rate range
of the product to be
Confirm whether the flow rate range is
connected is
correctly selected.
selected
incorrectly.
The flow
Check the condition of the flow
adjustment valve
adjustment valve.
is closed.
Operation of
pump while the Check the condition of the flow
flow adjustment adjustment valve and pump.
valve is closed.
Item to check
-65-
Recommended action
Correct the wiring.
Connect the connector.
We recommend a filter with
filtration of approx. 40
mesh.
Make the mounting
direction correspond to the
flow direction.
Fill up the fluid path.
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.
We recommend a filter with
filtration of approx. 40
mesh.
Make the mounting
direction correspond to the
flow direction.
Fill up the fluid path.
Select the correct flow rate
range.
Open the flow adjustment
valve to get appropriate
flow.
Open the flow adjustment
valve slightly, and let the
pulsation (pressure) from
the pump escape.
No.PF※※-OMN0012-I