WIKA CS4R - Manual (Page 29)

Operating Instructions Temperature Indicating Controller CS4R
V1.2 • 05/2006 - 29 -
The indication of PV
display is abnormal or
unstable. • Designation of the sensor input or temperature unit (°C or °F) is improper.
Set the sensor input and the temperature unit properly.
• Sensor correcting value is unsuitable.
Set the value suitably.
• Sensor specification is improper.
Set the sensor specification properly.
• AC may be leaking into the sensor circuit.
Change the sensor for the ungrounded type.
• There may be an equipment producing an inductive fault or noise near the
controller.
Keep the equipment producing an inductive fault or noise away from the
controller.
[ ] is indicated on
the PV display.
• The internal memory is defective.
Please contact our main office or dealers.
11.2 Key operation
Problem Presumed cause and solution
Settings (SV, P, I, D,
proportional cycle, alarm,
etc.) are impossible.
The value does not change
by the , keys. • Setting value lock (Lock 1 or Lock 2) is designated.
Release the lock designation.
• During PID auto-tuning
Cancel the auto-tuning if necessary.
The setting indication does
not change within the rated
input range even if the ,
keys are pressed, and
settings are impossible. • SV high limit or low limit may be set at the point the value does not
change.
Set it again while in Auxiliary function setting mode 1.
11.3 Control
Problem Presumed cause and solution
Process variable
(temperature) does not rise.
• The sensor is out of order.
Replace the sensors.
• Sensor is not securely mounted to the instrument input terminal, or
control output terminal is not securely mounted to the actuator input
terminal.
Mount the sensor or control output terminal securely.
• Is wiring of sensor terminal or control output terminal correct?
Wire it correctly.
The control output remains
ON status. • OUT low limit value is set to 100% or greater in Auxiliary function
setting mode 2.
Set the value appropriately.
The control output remains
OFF status. • OUT high limit value is set to 0% or less in Auxiliary function setting
mode 2.
Set the value appropriately.
• If you have any inquiries, please consult our agency or the shop where you purchased the unit.