GEAppliances CFE28TSH Technical Service Manual page 59

• Following pre-chill, the heated freezer and heated
fresh food defrost cycle is initiated where both
heaters will be on at the same time.
• The 3-way valve will move to the A position. The
• The freezer defrost heater remains on until the
freezer
temperature) or the maximum defrost time of 45
minutes is reached.
• The fresh food defrost heater remains on until the
fresh food
temperature) or the maximum defrost time of 45
minutes is reached.
• If either the fresh food or freezer defrost
ON time exceeds the normal defrost threshold
of approximately 20 minutes, the defrost is
considered abnormal. Abnormal defrost forces
both the fresh food and freezer into pre-chill after
6 hours of compressor run time (door openings
not counted).
• During defrost, if power is interrupted, the
refrigerator will restart in the dwell state if the
freezer
(defrost termination temperature).
•
will enter the dwell cycle.
•
unit will enter the dwell cycle.
• During the dwell cycle, the compressor and fans
3-way valve will move to the
A position (both fresh food and freezer open) and
remain there for the entire cycle.
• The dwell cycle will terminate after 7 minutes.
• At the end of the dwell cycle, the compressor run
timer for adaptive defrost is reset to 0 hours and
the refrigerator enters the post-dwell cycle.
• If power is interrupted during the dwell cycle and
freezer defrost termination temperature), the
dwell cycle will start over.
• Upon completion of the dwell cycle, the unit will
enter the post-dwell cycle.
• The 3-way valve will move to either the A or B
position, depending upon whether the fresh food
• The compressor and condenser fan will start, but
the fresh food fan, freezer fan, and ice box fan
• Post-dwell cycle will end when the freezer and
fresh food evaporators reach the post dwell exit
minutes has expired.
• Upon exit of post-dwell cycle, the control system
will now operate all cooling components by its
logic, and restarts the compressor run timer for
adaptive defrost.
Models operate as follows:
• Pull Down occurs when the refrigerator is
• Cooling operation is the normal cycling of
temperatures whether the last defrost was
normal or abnormal.
• Fresh food cycle defrost occurs when the 3-way
evaporator, but the freezer continues to cool.
• Pre-chill occurs before the freezer heated defrost.
• Fresh food defrosts occur 32, 64, and 96 hours
from the previous freezer and fresh food heated
defrost.
• Freezer heated defrost occurs every 96 hours of
compressor run time.
• Dwell occurs after every heated defrost cycle.
• Post Dwell occurs after every dwell cycle.
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