SMC Networks LFE0 Series, Руководство по эксплуатации, Страница: 60 / 68

-59-
No.LFE****-OMZ0013
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
Fault Detail Possible cause Item to check / Recommended action
Display
failure /
Output
signal
abnormal
No display /
No output
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.
Loose connector Check the Power supply/output connector is connected.
Unstable
display /
output
Foreign matter in
the sensor fluid
passage
Check the fluid passage for any foreign matter. Remove foreign
matter if necessary.
Water supply
shortage
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.
Pulsation in the
flow.
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.
Enabling the close proximity setting allows you to install the
products in the area closer than 50 mm.
Unstable
output
Noise
Keep the wiring route away from any power or high voltage
cables which may be a source of noise.
Narrow hysteresis
width,
accompanied with
chattering
Adjust the product so that the hysteresis width is increased to
avoid the chattering.
Incorrect
display
The piping is
connected in the
wrong direction
Check the mounting direction of the product.
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.
Leakage occurs
Check the piping connections for insufficient torque or defective
sealing which has caused the leakage.
The sensor flow
range selection is
incorrect.
Select the correct flow rate range.