Electronic Control System
3-23
#7019014 - Revision A - October, 2010
Built-In (BI) Series
Built-In (BI) Series
Additional Regulating of Refrigerator Compartment Temperatures:
Details of Controlling the Refrigerator Drawers Temperature
The refrigerator zone contains a diverter behind the evaporator cover, below the evaporator and just above the
refrigerator drawers. At the bottom of the evaporator cover is a series of holes and an air diverter near the location
of the diverter. The refrigerator air is drawn from the compartment and pushed down through the evaporator, some
air is diverted through the holes in the evaporator cover to the upper refrigerator compartment and some is allowed
past the diverter. Since cold air sinks, this cooling method allows for the drawers to remain approximately 2°F (1°C)
colder than the rest of the com-
partment. However, if the com-
partment thermistor detects
temperatures below 35°F (2°C),
the defrost time is extended
slightly to avoid freezing tem-
peratures in the drawer area.
NOTES:
• During Sabbath Mode the
lighting system is disabled
so the evaporator fan may be
observed running when the
door is open.
N.O.
N.C.
N.C.
Figure 3-41. Signal Trace Schematic: Drawer Area Temperature Control
1. Fan cycles on and off dur-
ing normal operation, but if
temperatures fall below 35°F
(2°C), fan switches off
2. Defrost is initiated, with an
extended “ON” time
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