Electronic Control System Overview - Sub-Zero 700-3 BASE Technical & Service Manual

Integrated

ELECTRONIC CONTROL SYSTEM OVERVIEW

This page contains the wiring schematic of the model 700BCI-3. Input operations for the electronic control system
are performed at the control panel (located inside the upper drawer), with monitoring, regulating and controlling func-
tions taking place at the main control board. Temperatures and possible problems with the unit are shown in the
control panel display. The entire electronic control system is described in greater detail on the following pages.
NOTE: For more detailed electrical diagrams refer to the wiring diagram and schematic supplied with the unit.
LOW VOLTAGE SCHEMATIC
DISPLAY
HIGH VOLTAGE SCHEMATIC
TAN
ORANGE
J2
PIN 1
MAIN BOARD
PIN 1
J6
J4
PIN 1
PIN 1
J5
ORANGE W/BLACK STRIPE
TAN
3
(700- BASE)
REF AIR DUCT
BAFFLE
MEMBRANE KEYPAD
DISPLAY BOARD
THERMISTOR
EVAPORATOR
THERMISTOR LOWER
DRAWER/FREEZER
THERMISTOR UPPER
DRAWER/REFRIGERATOR
115 VOLTS
60 CYCLES
L1 NEUTRAL
GRAY W/WHITE STRIPE
WHITE
GRAY
WHITE
P4
BLACK
P3
PURPLE
P1
BLUE
P2
PIN 1
J3 ORANGE
REF LIGHT
SWITCH
ORANGE
Figure 3-1. 700BCI-3 Wireing Schematic
Series
YELLOW W/WHITE
YELLOW W/BLACK STRIPE
YELLOW W/RED STRIPE
J2
ORANGE
PIN 1
YELLOW
PIN 1
RED
J3 WHITE
BLACK
ORANGE W/RED STRIPE
BLUE W/RED STRIPE
BLUE W/BLACK STRIPE
BLUE W/BLACK STRIPE
BLUE W/YELLOW STRIPE
BLUE W/YELLOW STRIPE
REF FAN
OVERLOAD
PROTECTOR
M
CONDENSER FAN
RED
GRAY W/WHITE STRIPE
BLUE GRAY W/WHITE STRIPE
DEFROST
TERMINATOR
REF (TOP)
DRAWER LIGHT
FRZ (BOTTOM)
FRZ LIGHT
SWITCH DRAWER LIGHT
ICEMAKER
ICEMAKER THERMAL
(OPTIONAL)
SWITCH FUSE
3-3
Electronic Control System
J2
PIN 1
MAIN BOARD
PIN 1
J6
BLUE
J4
PIN 1
PIN 1
PIN 1
J5
WHITE
M
RUNNING
CAPACITOR
MOTOR
(WHEN
USED)
COMPRESSOR
COMPRESSOR
STARTING
M
RELAY
M
FRZ FAN MOTOR
DEFROST HEATER
25 - 29 OHMS
DRAIN HEATER
1700 - 2100 OHMS
FILL TUBE HEATER
2800 - 3500 OHMS
ICEMAKER
VALVE
TAN
3757971 REV A
#3758424 - Revision B - December, 2005
P4
P3
P1
P2
J3