Troubleshooting - SMC Networks PF3WB Series Operation Manual

Troubleshooting

If an operation failure of the product occurs, please confirm the cause of the troubles from the following table.
If a cause applicable to the troubles cannot be identified and normal operation can be recovered by
replacement with a new product, this indicates that the product itself was faulty. Problems with the product
may be due to the operating environment (installation etc). Please consult SMC.
Cross-reference for troubleshooting
Fault Detail
No display
The display
is unstable.
Incorrect
display
(Integrated
display
type)
Incorrect
display
Flow does
not start.
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
(1) Confirm whether foreign matter may
has entered or got
enter.
stuck inside the
(2) Confirm whether any foreign matter
flow passage of
has got stuck inside.
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
Check if there is supply pressure
Pulsation in the fluctuation or pressure pulsation due to
flow. the characteristics of the compressor or
pump acting as the pressure source.
The flow
Check the condition of the flow
adjustment valve
adjustment valve.
is closed.
Stop valve is
Check for the stop valve.
closed.
Item to check
-34-
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.
Remove foreign matter.
Make the mounting
direction correspond to the
flow direction.
Fill up the fluid path.
Change to a pump with
less pulsation.
Install a tank to reduce the
pressure fluctuation.
Change to elastic piping
such as rubber hoses.
Open the flow adjustment
valve to get appropriate
flow.
Open the stop valve.
No.PF※※-OMW0004-A