Alarm Code #314
Model CPE52, 53, 14, 15, 15V, 16
Failure Temperature discrepancy failure of Supply or Return air temperature sensor ( TSUP or TRET )
Countermeasure
<< Cause –(4) >>
Sensor ( TSUP or TRET ) shift failure
< Check > ( Refer to Page F-21 )
Perform Full cool operation for more than 5min. and check the TSUP temperature is a few °C higher than the TRET temperature with the personal computer display or the LCD. And then check relation of the temperature and the resistance according to “ the thermistor sensor temperature – resistance curve ” shown on Page F-33. (Example) Remove the sensor from TB11 and immerse in 0°C water and check the resistance.
< Action >
Out of approx. 12 – 13 kohm range ( at 0°C ) : Replace TSUP or TRET sensor.
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