55
Hunting
For troubleshooting problems with connections and settings, refer to the same
probable causes and remedies as provided for overshooting and undershoot-
ing.
Probable cause
Remedy
Operation
Heat capacity of a heater controlling the
temperature of an object is too large for the
object.
Use a heater with a heat capacity suited to the
object.
Heat capacity of a controlled object changes due
to periodical external disturbances.
Take appropriate measures to prevent the
periodical external disturbances.
E5ZE is executing auto-tuning.
Hunting will not occur if auto-tuning is completed.
4-5
Output Errors
Control Output or Alarm Output Does Not Turn ON
Probable cause
Remedy
Connections
Process value of the E5ZE is abnormal.
Refer to 4-3 Temperature Sensing Errors for
appropriate troubleshooting.
Polarity of the load or connected terminals are
wired incorrectly.
Connectors are not connected to the correct
terminal blocks.
•
Correct the wiring.
•
Connect the connectors correctly.
Load exceeding the output ratings of the E5ZE is
connected.
•
Connect a load that does not exceed the output
ratings to the E5ZE.
•
Request repair of the E5ZE if it is
malfunctioning.
Load power supply is not connected to alarm
output or cooling control output.
Provide a power supply satisfying the output
ratings of the E5ZE and suitable for the load.
Polarity of the load power supply for alarm output
or cooling control output is incorrect.
Correct the wiring.
Power is not being supplied to the
wiring-reduction device.
Supply power required to satisfy the ratings of the
device.
The wiring-reduction device is not connected to
the E5ZE using Connecting Cable.
Use the Connecting Cable specified in 2-6 Wiring
CT Inputs and Control/Alarm Outputs.
Output Errors
Section 4-5