User Manual

128
12.3 Control
Problem
Possible Cause
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.
Wire them correctly.
The control output
remains in an ON
status.
OUT1 or OUT2 low limit value
is set to 100% or higher.
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.
Set it to a suitable value.
[ ] is indicated
in the PV display.
AT or ‘AT on startup’ has not
been completed even if
approx. 4 hours have elapsed
since AT or ‘AT on startup’
started.
Set P, I, D and ARW values manually
For ‘AT on startup’, PV slope
and delay time cannot be
measured normally for P, I, D
calculation.
For all other malfunctions, please contact our main office or dealers.