89
14.3 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.
• MV low limit value is set to 100% or higher.
Set it to a suitable value.
The control output
remains in an OFF status.
• MV high limit value is set to 0% or less.
Set it to a suitable value.
The motor valve does not
work at all.
The motor valve does not
work properly.
• If “FBP (feedback potentiometer) Yes” is selected, check if
FBP adjustment has completed.
See the FBP adjustment (p.31).
• If “FBP (feedback potentiometer) No” is selected, check if
Open and Closed output time are set to suitable values.
Refer to Open and Closed output time settings (p.32).
For all other malfunctions, please contact our main office or dealers.