Appendices
A-4
Appendices
Error Displays
When an error occurs, the error contents are shown on the display window.
This section describes how to check error codes on the display, and the actions to be taken
to remedy the problems.
Overflow
● Meaning
(1) The process value is higher than the control temperature range.
(2) The Sensor has shorted when using a thermistor model.
● Action
Check the wiring of inputs for miswiring, disconnections, and
short-circuits and check the input type.
If no abnormality is found in the wiring and input type, turn the power
OFF then back ON again.
● Operation at
Error
The error is displayed after it occurs, and the alarm output (models with
alarm function only) indicates that the upper-limit value has been
exceeded. The control output turns OFF when using heating control
(reverse operation), and turns ON when using cooling control (direct
operation).
* The error is displayed during PV display only.
The error is not displayed while the set point, alarm value, or input
shift value is displayed.
This error is not applicable to multi-input (thermocouple/platinum
resistance thermometer) models.
Underflow
● Meaning
(1) The process value is lower than the control temperature range.
(2) A Sensor disconnection has occurred when using a thermistor
model.
● Action
Check the wiring of inputs for miswiring, disconnections, and
short-circuits and check the input type.
If no abnormality is found in the wiring and input type, turn the power
OFF then back ON again.
● Operation at
Error
The error is displayed after it occurs, and the alarm output (models with
alarm function only) indicates that the lower-limit value has been
exceeded. The control output turns ON when using heating control
(reverse operation), and turns OFF when using cooling control (direct
operation).
* The error is displayed during PV display only.
The error is not displayed while the set point, alarm value, or input
shift value is displayed.
This error is not applicable to multi-input (thermocouple/platinum
resistance thermometer) models.
fff
---
To Next Page
Loading...
