SMC Networks PF3W7 Series, Operation Manual

Page: 66 / 93

-65-
No.PF
※※
-OMM0005-N
Fault Detail Possible cause Item to check Recommended action
Incorrect
display
Even though
the flow rate
is zero, it is
displayed. Operation of
pump while the
flow adjustment
valve is closed.
Check the condition of the flow
adjustment valve and pump.
Open the flow adjustment
valve slightly, and let the
pulsation (pressure) from
the pump escape.
Incorrect
output
No output
Incorrect wiring
Check if the brown wire DC(+), blue
wire DC(-), black wire(OUT1) and white
wire(OUT2) are connected correctly.
Correct the wiring.
Loose connector Check that the connector is connected. Connect the connector.
The flow
adjustment valve
is closed.
Check the condition of the flow
adjustment valve.
Open the flow adjustment
valve to get appropriate
flow.
Output 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.
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.
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.
Hysteresis value
too low. Confirm to what level the hysteresis is
set. Increase the hysteresis set
value.
Push
buttons
not
operating. No reaction
when the
buttons are
pressed.
Key-lock mode is
activated. Check if "LoC" displayed when the
button is pressed.
Chancel the key-lock
function. (Refer to page
61 .)