SMC Networks PF3W5 Series, Operation Manual

Page: 27 / 50

-26-
No.PF
※※
-OMN0010-J
Fault Detail Possible cause Item to check Recommended action
Incorrect
indicator
The indicator
does not turn
on.
Incorrect wiring
Check if the brown wire DC(+) and blue
wire DC(-) are connected correctly.
Correct the wiring.
The FLOW
indicator is
unstable.
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.
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.
Noise
Confirm that there is no power line or
high voltage line that can be a noise
source in the wiring route. Do not route wires and
cables together with power
or high voltage cables.
Incorrect
temp.
sensor
output.
Output is
unstable.
Insufficient water
supply
Confirm whether the fluid path is full. Fill up the fluid path.
Foreign matter
Check if foreign matter is stuck to the
sensor.
Remove foreign matter.
Improper
operation
of the flow
adjustment
valve.
It is not
possible to
adjust with
flow
adjustment
valve.
Lock the flow
adjustment valve Check the condition of the flow
adjustment valve and its lock ring.
Loose the lock ring and
adjust flow rate. (Refer to
page
21 .)
Insufficient supply
pressure
Check flow rate characteristics of the
supply pressure and flow rate
adjustment valve.
Increase supply pressure.