SMC Networks PF3A701H Operation Manual page 69

Problem Possible
Error indication
Key-lock mode is
Buttons do not
activated.
work
Product failure
Air leakage
There is noise.
Product failure
Effect of line
pressure
fluctuation
because
hysteresis is too
The operation is
narrow.
unstable.
(chattering)
Incorrect wiring/
broken lead wire
Product failure
Investigation method
causes
Check if the key-lock function is turned
on.
Check if air is leaking from the piping.
Check the set flow rate (hysteresis).
(1) Check the power supply wiring.
(2) Check if there is bending stress
applied to any part of the lead wire.
(bending radius, tensile force to the
lead wire)
-69-
Countermeasure
Check the key-lock function.
Replace the product
Rework the piping.
If the tightening torque is
exceeded, the mounting screws
and the switch may be damaged.
Replace the product
Check the flow rate setting.
(1) Check and correct the wiring.
(2) Correct the wiring.
(Reduce the tensile force or
increase the bending radius.)
Replace the product
No.PF※※-OMX0007-B