Viking VCSB48, Service Notebook

Page: 19 / 33

19
Electronic Function Description
Refrigeration Compartment Theory of Operation
As fresh food thermistor warms, resistance decreases
allowing low voltage signal to be sent to the
electronic control. Electronic control sends a low
voltage signal to semiconductor switch for DC fresh
food fan and DC condensate evaporator fan.
Both fans begin operating. Fresh food fan circulates
freezer air into fresh food compartment. Condensate
evaporator fan circulates air over condensate drain
pan aiding in evaporation.
As fresh food thermistor cools, resistance increases
blocking low voltage signal to electronic control
interrupting circuit to DC fresh food fan and DC
condensate evaporation fan.