SMC Networks ZL6 Series Operation Manual page 50

Error
Problem
No.
•An over current
error (Er1, 2) is
displayed.
•System error
(Er0, 4, 6, 7, 8 or
9) is displayed.
•"HHH" is
6
displayed.
•"LLL" is
displayed.
•Residual
pressure error
(Er3) is
displayed.
Possible cause
(1) Check if the output current is 80
mA or more.
(2) Check if the specified load is
connected.
Over current to the
(3) Check if a relay without a surge
output (Er1 and 2)
voltage suppressor is connected.
(4) Check if the wiring is in the same
route as (or bundled together with) a
high-voltage or power line.
Incorrect internal (1) Check if there is noise interference
data processing of (such as static electricity.
the product (Er0, (2) Check if the power supply voltage
4, 6, 7, 8 or 9) is in the range 24 VDC ±10%.
(1) Check that the pressure is not
Applied pressure above the upper limit of the set
is over the upper pressure range.
limit (HHH). (2) Check that foreign matter has not
entered the piping.
(1) Check that the pressure is not
Applied pressure below the lower limit of the set
is under the lower pressure range.
limit (LLL). (2) Check that foreign matter has not
entered the piping.
Pressure is not
atmospheric Check that a pressure above
pressure at ±3.5%F.S. was not applied, during
zero-clear zero-clear operation.
operation (Er3).
Product failure
-49-
Investigation method Countermeasure
(1)，(2) Connect the
appropriate load.
(3) Use a relay with a surge
voltage suppressor or
take measures to
prevent noise.
(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) Supply power in the
range 24 VDC ±10%.
(1) Reset applied pressure
to a level within the set
pressure range.
(2) Take measures to prevent
foreign matter from
getting into the piping.
(1) Bring the pressure back
within the set pressure
range.
(2) Take measures to prevent
foreign matter from
entering the piping.
Return the applied pressure
to atmospheric pressure,
and retry the zero clear
operation.
Replace the product.
NO.ZL3-OM00701-A