SMC Networks PF3W7 Series, Operation Manual

Page: 67 / 93

-66-
No.PF
※※
-OMM0005-N
Fault Detail Possible cause Item to check Recommended action
Improper
operation
of the
external
input.
No reaction
to the
external
Input.
Incorrect wiring
Check if the brown wire DC(+), blue
wire DC(-), black wire(OUT1) and white
wire(OUT2) are connected correctly.
Correct the wiring.
The input duration
is too short.
Confirm whether the input line is
connected to GND for a minimum of 30
msec.
When the external input is
applied, the input line must
be connected to GND for a
minimum of 30 msec.
Incorrect
temp.
sensor
displays.
The temp. is
not
displayed.
Setting condition
of the sub screen
Check the content of the sub screen.
Set the sub screen to the
temperature display.
Connector loose Check that the connector is connected. Connect the connector.
Incorrect
display
Insufficient water
supply
Confirm whether the fluid path is full. Fill up the fluid path.
Foreign matter
Check if foreign matter is stuck to the
sensor.
Remove foreign matter.
Incorrect
temp.
sensor
output.
Output is
unstable.
Insufficient water
supply
Confirm whether the fluid path is full. Fill up the fluid path.
Foreign matter
Check if foreign matter is stuck to the
sensor.
Remove foreign matter.
Improper
operation
of the flow
adjustment
valve.
It is not
possible to
adjust with
flow
adjustment
valve.
Lock the flow
adjustment valve Check the condition of the flow
adjustment valve and its lock ring.
Loose the lock ring and
adjust flow rate. (Refer to
page
22 .)
Insufficient supply
pressure
Check flow rate characteristics of the
supply pressure and flow rate
adjustment valve.
Increase supply pressure.