CONSTRUCTION
The cooler (solar sensor) thermistor consists of a photo diode, 2 amplifier circuits for the cooler (solar sensor) thermistor and a frequency converter circuit for the automatic light control sensor.
The cooler (solar sensor) thermistor detects (in the form of changes in the current that flows through the built-in photo diode) the changes in the amount of sunlight from its LH and RH sides (2 directions) and outputs sunlight strength signals to the air conditioning amplifier assembly.