3-10
Electronic Control System
7011902 - Revision A - October, 2009
International Integrated
International Integrated
(ICB700 Base)
(ICB700 Base)
Series
Series
FUNCTIONS OF ELECTRONIC CONTROL SYSTEM
The following few pages explain monitoring, regulating and controlling functions of the electronic control system.
Display Zone Temperatures
The temperature signals from the thermistors in the refrigerator and freezer compartments are monitored by the
microprocessor and then displayed on the LCD. Though the compartment air temperature does fluctuate, the LCD
displays the average temperature (See Figure 3-17).
NOTE: If zone temperature changes, temperature display will change by one degree per minute.
Figure 3-17. Display Zone Temperatures
Average temperature displayed
Figure 3-18. ICB700BCI Signal Trace Schematic (High Voltage) of Lighting System
1. 230 Volts are supplied
to lighting system unless
unit is switched OFF, or
in Sabbath Mode.
2. Light switch position monitored
for alarm and fan operation.
Supply Power to the Lighting System
Power is supplied to the lighting system through the control board when the unit is switched ON by pressing
POWER key. With a drawer open, the light switch allows power to the light. (See Figure 3-18).
NOTE: Power to the lights is monitored by the microprocessor to control the door ajar alarm feature and to help
control the operation of the evaporator fan and/or refrigerator compartment fan.
NOTE: When in Sabbath Mode, lighting system is disabled. Sabbath Mode will be covered later.
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