Page 47
Electronic Control
Integrated (
Integrated (
700-
700-
2) Series
2) Series
3-37
#
3756780
- Revision D - July, 2005
Figure 3-80. Average Freezer Compartment Temperature Displayed
FREEZER
ON/OFF
ICE
ON/OFF
UNIT
COLDER
WARMER
ON/OFF
LT. BLUE W/YELLOW
LT. BLUE W/YELLOW
BLACK
PURPLE
WHITE
RED
NEUTRAL
THERMISTOR
TOP DRAWER
RUNNING
M
STARTING
RELAY
COMPRESSOR
M
M
OVERLOAD
PROTECTOR
EVAPORATOR FAN MOTOR
COMPRESSOR
CAPACITOR
L1
115 VOLTS
60 CYCLES
MAIN BOARD
CONDENSER FAN
HIGH VOLTAGE SCHEMATIC
MAIN BOARD
LOW VOLTAGE SCHEMATIC
DISPLAY BOARD
WHITE
Figure 3-79. Signal Trace Schematic (High & Low Voltage) of
700BF/I-2 Calling for Cooling
The two drawers of the 700BF/I-2 are con-
sidered one compartment/zone. It is not
possible to set two different set-points for
the individual drawers.
The temperature signal from the thermis-
tor in the upper reed switch is monitored
by the microprocessor, and displayed on
the LCD. Though the compartment air
temperature does fluctuate, the LCD dis-
plays the average temperature
When the compartment
temperature reaches high offset, the
microprocessor supplies power to the
evaporator fan, compressor and condens-
er fan.
When the
compartment temperature reaches low off-
set, the microprocessor interrupts power
to the compressor and evaporator fan,
cycling them off.
NOTE:
If the compartment temperature
should ever exceed either the high offset
or low offset (example: when a door is left
open), the temperature displayed on the
LCD will change by one degree per
minute.
High offset temperature
detected
Evap fan, compressor and
condenser fan energized
Monitor, Regulate and Display Temperatures in the 700BF/I-2