38
The indication of PV display
is irregular 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 the instrument 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,
proportional cycle or alarm
value.
• The values do not change
by
,
keys.
• Set value lock (Lock 1 or Lock 2) is selected.
Release the lock in [Set value lock].
• AT or auto-reset is performing.
In the case of AT, cancel the AT.
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 or low limit value in Setup mode may be set at the
point where the value does not change.
Set it to a suitable value while in Setup mode.
13.3 Control
Problem
Possible 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 or OUT2 low limit value is set to 100% or higher in Setup mode.
Set it to a suitable value.
The control output remains in
an OFF status.
• OUT1 or OUT2 high limit value is set to 0% or less in Setup mode.
Set it to a suitable value.
For all other malfunctions, please contact our main office or dealers.