SMC Networks PF2A7 Series Operation Manual page 34

Fault
Wiring failure.
There is no output.
Connector loose.
Foreign matter inside.
Piping is connected in the wrong
direction.
Output is unstable.
Pulsation in the flow.
Air leakage.
Hysteresis is too narrow.
The buttons cannot be
Key-lock mode is activated.
operated.
Probable cause
Correct the wiring.
Check the connector.
Install a filter or mist separator at IN side of product.
If there is foreign matter stuck to the mesh, remove it
completely, taking care not to damage the product.
Install with the mounting direction corresponding to
the flow direction (arrow indicated on the product).
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 tube.
Check that seal tape has been applied correctly.
Reconnect the pipes with the specified tightening
torque.
Increase the hysteresis.
Cancel the Key-lock function. (page 30)
-33-
Recommended action
No.PF※※-OMO0008-C