Omron CJ Series Operation Manual page 101

Troubleshooting
Step
Usage There is a thermocouple input and the input termi-
nals are shorted.
The temperature sensor was replaced or switch
settings were changed while the power was ON.
78
Possible Cause
Here is a simple method to check the temperature sensor inputs:
With a resistance-thermometer Unit, connect a 100-
temperature sensor input terminals and short the B-B terminals. The Tem-
perature Control Unit is operating normally if the measured temperature is
at the 0.0 ° C or 32.0 ° F level.
With a thermocouple Unit, short the temperature sensor input terminals.
The Temperature Control Unit is operating normally if the measured tem-
perature is the temperature in the vicinity of the terminal block.
Remedy
Connect a thermocouple.
Turn the power OFF and then ON again.
Section 5-2
Ω
resistor to the A-B