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Problem
Possible Cause and Solution
[
] is flashing on
the PV Display.
• Check if polarity of thermocouple or compensating lead wire
is correct.
• Check whether codes (A, B, B) of RTD match the instrument
terminals.
The PV Display keeps
indicating the value
which was set in
[Scaling low limit].
• Check whether the input signal wire for DC voltage (0 to 5 V
DC, 0 to 10 V DC) and current (0 to 20 mA DC) is disconnected.
How to check whether the input signal wire is disconnected
[Voltage (0 to 5 V DC, 0 to 10 V DC)]
If the input to the input terminals of the instrument is 1 V DC
and if a value (converted value from Scaling high, low limit
setting) corresponding to 1 V DC is indicated, the instrument
is likely to be operating normally, however, the signal wire
may be disconnected.
[Direct current (0 to 20 mA DC)]
If the input to the input terminals of the instrument is 4 mA
DC and if a value (converted value from Scaling high, low
limit setting) corresponding to 4 mA DC is indicated, the
instrument is likely to be operating normally, however, the
signal wire may be disconnected.
• Check whether the input lead wire terminals for DC voltage
(0 to 5 V DC, 0 to 10 V DC) or direct current (0 to 20 mA
DC) are securely mounted to the instrument input terminals.
The indication of PV
display is irregular or
unstable.
• Check whether sensor input or temperature unit ( , ) is
correct.
Select the sensor input and temperature unit ( , ) properly.
• Sensor correcting value is unsuitable.
Set it to a suitable value.
• Check whether the specification of the sensor is correct.
• AC leaks into the sensor circuit. Use an ungrounded type
sensor.
• There may be equipment that interferes with or makes noise
near the controller.
Keep ACD-13A or ACR-13A clear of any potentially
disruptive equipment.
[
] is indicated on
the PV Display.
• Internal memory is defective.
Contact our agency or us.
13.2 Key Operation
Problem
Possible Cause and Solution
• Unable to set the SV, P,
I, D, Event alarm value,
etc.
• The values do not
change by the
,
keys.
• Set value lock (Lock 1 to Lock 4) is selected.
Release the lock in [Set value lock].
• AT (Auto-tuning) or auto-reset is performing.
In the case of AT, cancel AT.
It takes approximately 4 minutes until auto-reset is finished.
Setting items of each
Event output are not
indicated.
Check if the desired action has been selected in [Event
output allocation].
Содержание ACD-13A
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