Panasonic AKT4112100J Temperature Controller KT4 AKT4112100J Datenbogen

20 

[

] is flashing on the PV 

display. 

• Check whether the polarity of thermocouple or compensating lead 
  wire is correct. 
• Check whether codes (A, B, B) of RTD agree with the instrument 

input terminals. Ensure that they are wired properly. 

The PV display keeps indicating 
the value which was set during   
scaling low limit value. 
 

• Check whether the input signal source for DC voltage (0 to 5V DC, 

0 to 10V DC) and DC current (0 to 20mA DC) is disconnected. 

How to check whether the input signal wire is disconnected 
[DC voltage (0 to 5V DC, 0 to 10V DC)] 

If the input to the input terminal of the instrument is 1V DC and if a 
value corresponding to 1V DC is indicated, the instrument is likely to 
be operating normally, however, the signal wire may be disconnected.

[DC current (0 to 20mA DC)] 

If the input to the input terminal of the instrument is 1mA DC and if a 

value corresponding to 1mA DC is indicated, the instrument is likely to

be operating normally, however, the signal wire may be disconnected.

• Check whether the input terminal of DC voltage (0 to 5V DC, 0 to 

10V DC) and DC current (0 to 20mA DC) is securely mounted to the
instrument input terminals. Ensure that DC input terminals are 
mounted to the instrument input terminals securely. 

The indication of PV display is 
abnormal or unstable. 

• Check whether sensor input or temperature unit (  or  ) is correct.

Select the sensor input and temperature unit (  or  ) properly. 

• Sensor correcting value is unsuitable. Set it to a suitable value. 
• Check whether the specification of the sensor is correct. 
    Set the sensor to the proper specification. 
• AC leaks into the sensor circuit.    Use an ungrounded type sensor. 
• There may be equipment that interferes with or makes noise near 

the controller. 
Keep equipment that interferes with or makes noise away from the 
controller. 

The PV display is indicating   
[

]. 

• Internal memory is defective. 
  Contact our agency or us. 

• Unable to set the SV, P, I, D, 

proportional cycle or alarm 
setting  

• The values do not change by   

, 

 keys. 

• Set value lock (Lock 1 or Lock 2) has been selected. 

Release the lock selection. 

• During PID auto-tuning or auto-reset. 

In the case of PID auto-tuning, cancel auto-tuning. 
It takes approximately 4 minutes until auto-reset is finished. 

The setting indication does not 
change in the input range even if 
the 

, 

 keys are pressed, 

and new values are unable to be set. 

• SV high or low limit value in the Auxiliary function setting mode 1 

may be set at the point where the value does not change. 

Set it to a suitable value while in the Auxiliary function setting mode 1. 

Temperature does not rise. 

• Sensor is out of order. 

Change the sensor.

 

• Check whether the sensor is securely mounted to the instrument 

input terminal.  
Check whether control output terminals are securely mounted  
to the actuator input terminals. 
Mount the sensor or control output terminal securely. 

• Ensure that the wiring of sensor or control output terminal is 

correct. 

The control output remains in 
an ON status. 

• OUT1 or OUT2 low limit value is set to 100% or higher 

during Auxiliary function setting mode 2. 
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 during  

Auxiliary function setting mode 2. 
Set it to a suitable value. 

  For all other malfunctions, please contact our main office or dealers. 

Matsushita Electric Works, Ltd.      Automation Controls Business Unit 
Head Office : 1048 Kadoma, Kadoma-shi, Osaka 571-8686, Japan 
Telephone  : Japan (81) Osaka (06) 6908-1050 
Facsimile    : Japan (81) Osaka (06) 6908-5781