SMC Networks PFM7 Series User Manual

-50-
No.PF※※-OMJ0006-G
Troubleshooting
Troubleshooting
If an operation failure occurs with the product, use the chart below to find out the cause of the problem.
If none of the countermeasures seem to be applicable, or a replacement product operates normally when
installed, the product may be faulty. A product can be damaged by the operating environment (system
configuration etc). If the product seems to be faulty, please contact SMC.
●Faults and countermeasures
Fault
Status
Possible cause
Item to check
Countermeasure
Incorrect
display
No Display
Incorrect wiring
Check that the brown and blue
wires are connected to DC (+)
and DC ( - ) respectively.
Correct the wiring.
Loose connector
Check the connectors.
Correct the connector wiring.
Display is
flashing
Peak/bottom value
display mode is
selected
Check if the peak value or bottom
value display mode has been
selected.
Refer to "Peak/bottom value
display" (page 45), and
remove the setting.
Display is not
stable
Foreign matter has
entered the flow
passage or
adhered to the
sensor
(1) Check if any foreign matter
has entered the flow passage.
(2) Check if there is foreign matter
on the mesh.
Install a filter or mist
separator on the IN side.
Piping connected
backwards
Check that the fluid flow is in the
same direction as marked on the
product body.
Ensure the product is
mounted so that the fluid flow
matches the direction marked
on the product body.
Flow is pulsing
Check if there is any supply
pressure fluctuation or pressure
pulsation due to the
characteristics of the source
compressor (or pump).
Install an accumulator tank to
reduce the pressure
fluctuation.
Change the pressure source
to one that has less pulsation.
Incorrect
display
Foreign matter has
entered the flow
passage or
adhered to the
sensor
(1) Check if any foreign matter
has entered the flow passage.
(2) Check if there is foreign matter
on the mesh.
Install a filter or mist
separator on the IN side.
Piping in the
reverse direction
Check that the fluid flow is in the
same direction as marked on the
product body.
Ensure the product is
mounted so that the fluid flow
matches the direction marked
on the product body.
Incorrect display
units setting
Check the display unit selected.
Select the appropriate units.

SMC Networks PFM7 Series Specifications

General

Brand	SMC Networks
Model	PFM7 Series
Category	Switch
Language	English