63
• Check whether the input lead wire terminals for DC voltage (0 to 5V
DC, 0 to 10V DC) or DC current (0 to 20mA DC) are securely
mounted to the instrument input terminals.
The indication of PV display is
abnormal or unstable.
• Check whether sensor input or temperature unit (
or
) is correct.
Select the sensor input and temperature unit (
or
) 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 equipment that interferes with or makes noise away from the
controller.
[
] is indicated on the PV
display.
• Internal memory is defective.
Please contact our agency or us.
14.2 Key operation
Problem
Presumed cause and solution
• Unable to set the SV, P, I, D,
proportional cycle or alarm
setting
• The values do not change by
,
keys.
• Set value lock (Lock 1 or Lock 2) is selected.
Release the lock in the “Set value lock selection” of Auxiliary
function setting mode.
• Auto-tuning or auto-reset is performing.
In the case of auto-tuning, cancel auto-tuning.
It takes approximately 4 minutes until auto-reset is finished.
The setting indication does not
change in the input range even if
the
,
keys are pressed,
and new values are unable to be
set.
• Scaling high limit or low limit value may be set at the point where the
value does not change.
Set it to a suitable value while in the Setup mode.
14.3 Control
Problem
Presumed cause and solution
Temperature does not rise.
• Sensor is out of order. Replace the sensor.
• Check whether the Sensor or control output terminals are securely
mounted to the instrument input terminals.
Ensure that the sensor or control output terminals are mounted to
the instrument input terminals securely.
• Check whether the wiring of sensor or control output terminals is correct.
The control output remains in an
ON status.
• OUT1 (OUT2) low limit value is set to 100% or higher in the Setup
mode.
Set it to a suitable value.
The control output remains in an
OFF status.
• OUT1 (OUT2) high limit value is set to 0% or less in the Setup mode.
Set it to a suitable value.
