Whirlpool GI7FVCXWA Bottom, Technical Education, Page: 25 / 102

3-1
PRODUCT OPERATION
Electrical Shock Hazard
Disconnect power before servicing.
Replace all parts and panels before
operating.
Failure to do so can result in death or
electrical shock.
Control System Overview:
The control provides independent tempera-
ture control for the Refrigerator, Freezer and
Ice Maker compartments by monitoring NTC
Thermistors for the actual temperature of each
compartment. It also considers the ambient
temperature measured by a sensor. It receives
temperature set points of each compartment
from an externally connected user interface,
except for the Ice Maker compartment which
is internally defined. Based on these inputs,
the control determines the required state of the
Compressor, Evaporator Fan and Air Baffle.
The optimal defrost times are determined by
monitoring the length of time required to defrost
the evaporator compared to an ideal defrost
length.
MAIN CONTROL BOARD
Board Over Temperature Operation – Control
Board has an onboard thermistor. If thermistor
detects a temperature of 75 C/167F or higher,
all thermostatic loads will turn off. Normal op-
eration will resume when the thermistor senses
a temperature of 60C/140F or less.
Compartment Lights – All compartment
lights turn off after 10 minutes of door be-
ing open, no matter which door is open.
Note: In Service Mode, in the diagnostic steps
the lights work normally and will turn off after
10 minutes of elapsed time.