Electronic Control
Integrated (
Integrated (
700-
700-
2) Series
2) Series
3-8
#3756780 - Revision D - July, 2005
Monitor, Regulate and Display Compartment Temperatures (700TC/I-2, 700TR-2 and 700TF/I-2)
In the models 700TC/I-2, 700TR-2 and 700TF/I-2, the temperature signal from the thermistor in the refrigerator
and/or freezer compartment is monitored by the microprocessor and then displayed on the LCD. Though the com-
partment air temperature does fluctuate, the LCD displays the average temperature (See Figure 3-10). When the
compartment temperature reaches high offset, the microprocessor supplies power to the compressor and evaporator
fan (See Figure 3-11). As the compressor and evaporator fan run, the compartment temperature drops. When the
compartment temperature reaches low offset, the microprocessor interrupts power to the compressor and evaporator
fan, cycling them off.
NOTE: If the average compartment temperature changes, the temperature displayed on the LCD will change by one
degree per minute.
Figure 3-10. Average Compartment Temperature Displayed
Compartments
calling for cooling
(Temp. above high offset)
Compressors and
evaporator fans
energized
Figure 3-11. 700TC/I-2 Signal Trace Schematic (High & Low Voltage) of Regulating Temperatures
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