For systems that have a serpentine sensor, the defrost process will be done
based on the input information from the external coil sensor.
The start of the defrost will occur when the temperature of the external coil sensor
reach 0ºC and stay for more than 40 minutes or reach -3ºC and stay for
more than 3 minutes; The defrost logic is the same as for non-sensor systems in the external coil; The defrost is terminated when the temperature of the external coil sensor reaches 20 ° C or after 10 minutes.
