-23-
No.LFE****-OMZ0012
Troubleshooting
Applicable products: LFE 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 (installation location, etc.). Consult with SMC separately to
obtain countermeasures.
Troubleshooting list
Item to check / Recommended action
Incorrect wiring /
Disconnection
Check to see that the brown wire DC(+), blue wire DC(-), black
wire (OUT1), and white wire (OUT2) are correctly connected to
the product and that there are no broken wires.
Check the M12 connectors for corrrect engagement.
Foreign matter in
the sensor fluid
passage
Check the fluid passage for any foreign matter. Remove foreign
matter if necessary.
Check to see if the fluid passage is completely filled with fluid.
There are bubbles
in the fluid path.
Place the piping in the correct position for helping discharge air
bubbles. (See page 7.)
It is recommended to place a component to reduce pulsating flow
or a tank to reduce pressure fluctuation or replace the piping with
elastic tubing, such as a rubber hose.
Installed in area
not suitable for
mounting.
Check the products installed close together for sufficient
clearance and keep a distance of 50 mm or more between them.
Keep the wiring route away from any power or high voltage
cables which may be a source of noise.
The piping is
connected in the
wrong direction
Check the mounting direction of the product.
Align the direction of the mounting (flow mark) and flow.
Output load is not
appropriate
Check to see if a load is correctly connected, and especially for
the analogue output type, check it for correct impedance.
Check the piping connections for insufficient torque or defective
sealing which has caused the leakage.
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