-29-
No.PS
※※
-OMJ0004-E
Reference
No.
Problem
Possible cause
Investigation method
Countermeasure
6
●
An over
current error
(Er1) is
displayed.
●
A system
error (Er4, 6,
7, 8) is
displayed.
●
The display
shows
"HHH".
●
The display
shows "LLL".
●
A residual
pressure
error (Er3) is
displayed.
Over current to
the output
(Er1)
1. Check if a current of 80 mA or more
is flowing to the output.
2. Check whether the connected load
is as specified, and confirm that
there is no short circuit in the load.
3. Check if a relay without a surge
voltage suppressor is connected.
4. Check if the wiring is in the same
route as (or bundled together with)
the high-voltage line or power line.
1. 2. Connect the load as
specified.
3. Change to a relay with a
surge voltage suppressor or
take measures to prevent
noise.
4. Separate the wiring from the
high voltage line and power
line.
Improper
transaction of
the internal
data of the
Pressure
switch
(Er4, 6, 7, 8)
1. Confirm that there is no possibility
of noise interference, such as static
electricity.
2. Confirm that the power supply
voltage is in the range of 12 to 24
VDC
10%.
1. Remove the noise source or
take measures to prevent
noise interference and turn off
the power supply. Then, turn
the power supply on again.
2. Supply an operating voltage
of 12 to 24 VDC
10%.
Applied
pressure over
the upper limit
(HHH)
1. Confirm that the pressure is not
over the upper limit of the set
pressure range.
2. Check if moisture such as water
droplets has entered the inside of
the piping.
1. Return the pressure to within
the set pressure range.
2. Take measures to prevent
moisture from entering the
piping.
Applied
pressure under
the lower limit
(LLL)
1. Confirm that the pressure is not
over the upper limit of the set
pressure range.
2. Confirm if the moisture such as
water drop has entered the inside
of the piping.
1. Return the pressure within
the set pressure range.
2. Take the measure to prevent
the moisture from entering to
the piping.
The pressure is
not atmospheric
pressure for zero
clear operation
(Er3)
Check if the pressure difference is
more than ±10%F.S. from
atmospheric pressure (±0.11 MPa or
more) when the zero clear operation
is performed.
Return the applied pressure to
atmospheric pressure and retry
the zero clear operation.
Product failure
Replace the product.
7
The values in
the display
fluctuate.
Incorrect
power supply
Confirm that the power supply voltage is
within the range of 12 to 24 VDC
10%.
Supply a power supply voltage
of 12 to 24 VDC
10%.
Incorrect wiring
Check the wiring to the power supply.
Confirm that the brown and blue wires
are connected to DC(+) and DC(-)
respectively, and that the output line
has not come off (contact failure).
Correct the wiring.
Factory
pressure
change
Check if the factory pressure has
changed.
If the fluctuation is worrisome,
consider that a change in the
response time correspondingly
increases the interval for
updating the display, and set
the response time longer.
