SMC Networks PF3A703H-L Operation Manual page 87

Problem Possible
Error indication
Excess current
was applied to the
output (Er1)
•
Over current error
(Er1) is displayed
•
System error
Incorrect internal
(Er0, 4 to 16, 40)
data processing of
is displayed
the product
•
(Er0, 4 to 16, 40)
"HHH" is
displayed
Applied flow rate is
higher than the
upper limit (HHH)
Product failure
Incorrect power
supply
Incorrect wiring
The display is
unstable.
Factory line
pressure is not
stable
Investigation method
causes
(1) Check if the output current is 80 mA
or greater.
(2) Check if the connected load
complies with the specification.
Check if the load is short circuited.
(3) Check if the relay without surge
protection is connected.
(4) Check if the wiring is in the same
route as (or bundled together with) a
high-voltage or power line.
(1) Check if there is noise interference
(such as static electricity).
Check if there is a noise source
nearby.
(2) Check if the power supply voltage is
in the range 24 VDC ±10%.
(1) Check if the flow rate exceeds the
upper limit of the set flow rate.
(2) Check if foreign matter has entered
the piping.
Check if the power supply voltage is in
the range 24 VDC ±10%.
Check the power supply wiring
Check if the brown and blue wires are
connected to DC(+) and DC(-)
respectively, and if the wiring is secure
Check if the factory line pressure is
changing.
-86-
Countermeasure
(1)(2) Connect the appropriate
load.
(3) Use a relay with a surge
voltage suppressor or take
measures to prevent surge.
(4) Separate the wiring from the
high-voltage and/or power
line.
(1) Remove the noise and the
noise source (or take
measures to prevent noise
interference), and reset the
product (or turn off and then
turn back on the power
supply.
(2) Check that the Power supply
voltage is 24 VDC ±10%.
(1) Reset applied flow rate to a
level within the settable flow
range.
(2) Take measures to prevent
foreign matter from entering
the piping.
Replace the product
Power supply voltage is 24 VDC
±10%.
Check and correct the wiring.
Setting of the response time may
improve the condition.
No.PF※※-OMX0002