Model 427R-2 Refrigerator Section Electronic Control System Overview; High Voltage; Low Voltage - Sub-Zero 424HAG/O-2 Service Manual

Wine Storage
Wine Storage

MODEL 427R-2 REFRIGERATOR SECTION ELECTRONIC CONTROL SYSTEM OVERVIEW

This page contains the wiring schematic for the refrigerator section of the model 427R-2. Input operations for the
electronic control system are performed at the control panel (located inside the upper drawer), with monitoring, regu-
lating and controlling functions 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.

HIGH VOLTAGE

ORANGE
J2
J6
J4
J5

LOW VOLTAGE

THERMISTER
CABINET
DRAWER
CONTROL
(400-
(400-
NEUTRAL WHITE
WHITE
P4
BLACK BLACK
PURPLE
P3
PURPLE
P1
BLUE
P2
MAIN
RED
BOARD
J3
6
1
DPDT RELAY
NEUTRAL WHITE
ORANGE
BLUE W/ WHITE
BLUE W/ WHITE
MAIN
BOARD
BLACK
WHITE
RED
YELLOW
ORANGE
BLUE
Figure 3-42. 427R-2 Wiring Schematic
Series
Series
2
2
)
)
L1 NEUT
115 VOLTS
60 CYCLES
OVERLOAD
PROTECTOR
RED
DOOR SWITCH
YELLOW
5 4
DOOR SWITCH
ORANGE
3
3-23
Electronic Control System
NEUTRAL WHITE
CONDENSER FAN MOTOR
M
2000 Ω
MULLION HEATER
COMPRESSOR
STARTING RELAY
M
COMPRESSOR
EVAPORATOR FAN MOTOR
M
TOP DRAWER LIGHTS
LOWER DRAWER LIGHTS
BLUE /W BLACK
BLUE /W BLACK
THERMISTER
EVAPORATOR
#3758410 - Revision C - May, 2014