KitchenAid THEORY OF OPERATION

3-1
OVERVIEW
The KitchenAid Counter Depth Refrigerator
Constant Flow Temperature Management Sys-
tem uses two thermistors to monitor tempera-
ture changes inside the refrigerator and freezer
compartments. The electronic control man-
ages the operation of the variable capacity
compressor (VCC), a variable speed evapora-
tor fan motor, and a variable position air door.
The air door allows independent temperature
control of the refrigerator and freezer compart-
ments.
The electronic control seeks the most efficient
means possible to maintain temperatures as it
controls the operation and speed of the com-
pressor and the evaporator fan motor. Higher
fan speed is used before increasing the com-
pressor speed to minimize power consump-
tion. A nearly constant run time is sought at the
lowest possible fan and compressor speed.
Warmer
Water
Filter
Power
On/Off
Warmer
Cooler
Freezer Refrigerator
Cooler
46
40.4
38.7
37
35.3
33.6
31.9
8
3.4
1.7
0
–1.7
–3.4
–5.1
THE ELECTRONIC CONTROL PANEL
NOTE: The illustration above shows the actual
temperature that is associated with each corre-
sponding LED.
Freezer temperatures can be set from 8°F to
–5°F (–13°C to –21°C). Refrigerator tempera-
tures can be set from 46°F to 32°F, (8°C to
0°C).
The Adaptive Defrost Control (ADC) portion of
the electronic control utilizes “pulsed defrost”
technology to perform the defrost function (see
page 3-4).
The electronic control monitors the water valve
for total elapsed time and gallons of water
used. The Water Filter Indicator (WFI) LED
changes color to indicate that the filter needs to
be replaced.
Pressing the Temperature Up or Down adjust-
ment keys will change the refrigerator and
freezer settings. One of seven (7) LEDs light to
display the refrigerator and the freezer set-
tings.
THEORY OF OPERATION