Sub-Zero Built-in Series Assembly

Electronic Control System
3-24
#7019014 - Revision A - October, 2010
Built-In (BI) Series
Built-In (BI) Series
Monitor and Control Refrigerator Fan-Assisted, Off-Cycle Defrost
Temperature signals from the refrigerator compartment and evaporator thermistor’s are observed by the micro-
processor. During the off cycle defrost, if the refrigerator compartment temperature reaches high offset (calling for
cooling) before the evaporator temperature rises to 38°F (3°C), no power will be supplied to the compressor, but the
evaporator fan will be switched ON. Only after the evaporator temperature reaches 38°F (3°C) will the compressor
be energized. (See Figure 3-42).
NOTES:
• if the compartment thermistor
detects temperatures below
35°F (2°C), the defrost time
is extended slightly to avoid
freezing temperatures in the
drawer area.
• If the refrigerator compart-
ment thermistor is faulty, the
refrigerator compressor
defaults to 20 minutes ON,
40 minutes OFF cycling, EE
appears at right in LCD, the
service icon flashes and the
appropriate fault code is
logged.
• If the refrigerator evaporator
thermistor is faulty, the refrig-
erator compressor will not
energize until compartment
air temperature exceeds high
offset by 5°F (3°C); the serv-
ice icon flashes and the
appropriate fault code is
logged.
• If in Sabbath Mode, the com-
partment thermistor still con-
trols compressor operation,
except that when high offset
is reached, there is a random
15 to 25 second delay before
the cooling cycle is started.
115 VOLTS
60 CYCLES
L1
NEUTRAL
N.O.
WATER FILTER SWITCH
P16
MAIN
CONTROL
BOARD
P1
3
P14
L1
L1
NEUTRAL
1164
P2
P15
85
P3
P6
P5
P6
P9
P8
P7
P18
DEFROST HTR
COMP2
COMP1
MAIN LIGHTS
N.C.
N.C.
FZ DOOR SWITCH
REF DOOR SWITCH
ISOLATION VALVE
660 Ω
WATER VALVE
160 Ω
M
IM
CONDENSER FAN MOTOR
CRISPER LIGHTS
REF LIGHTS
AIR FILTER LIGHT
FREEZER LIGHTS
FILL-TUBE HEATER
2300-2900 Ω
DEF HEATER
27.9-30.9 Ω
DEFROST TERMINATOR
REFRIGERATOR COMPRESSOR
STARTING RELAY
FREEZER COMPRESSOR
STARTING RELAY
PURPLE
WHITE
WHITE/BLUE
WHITE/BLUE
BLUE
WHITE
PURPLE
GRAY RED
PINK
YELLOW
BLACK
RED
WHITE/BLUE
TAN
BLUE
ORANGE
YELLOW
YELLOW
ORANGE/BLACK
GRAY/WHITE
ORANGE/BLACK
WHITE
RED/WHITE
WHITE/RED
TAN
PINK
GRAY
ORANGE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
TAN/WHITE
TAN/WHITE
BROWN
YELLOW
WHITE
REF
EVAPORATOR FAN
FREEZER EVAPORATOR FAN
M
M
FLOW
METER
THERMISTER FREEZER EVAP
THERMISTER FREEZER CABINET
THERMISTER REF CABINET
THERMISTER REF EVAP
BROWN
BLACK/WHITE
WHITE/BLACK
BLUE
BROWN
BLUE
BROWN
YELLOW
RED
YELLOW/BROWN
BLUE/WHITE
BROWN
BLUE
BLUE
BROWN
BLUE
WHITE
MAIN CONTROL BOARD
16
1
17
1
P18
3
P6
P15
P16
85
P14
1164
P6
P9
P8 P7
P5
P2
P3
P1
DEFROST HTR
COMP2
COMP1
MAIN LIGHTS
L1
NEUTRAL
L1
EXERNAL
DEVICE
KEYPAD
LOW VOLTAGE
HIGH VOLTAGE
Figure 3-42. Signal Trace Schematic: Refrigerator Off-Cycle Defrost
2. Run command sent
to evaporator fan
1. High offset temperature detected in refrigerator
3. Ref. evap.below
38°F (3°C)
4. Compressor not energized until
evaporator temp climbs to 38°F (3°C)
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Sub-Zero Built-in Series Specifications

General

Type	Built-in Refrigerator
Brand	Sub-Zero
Series	Built-in Series
Refrigeration Type	Dual Refrigeration
Total Capacity	Varies by model
Refrigerator Capacity	Varies by model
Freezer Capacity	Varies by model
Height	Varies by model
Finish Options	Stainless Steel, Custom Panel Ready
Lighting	LED
Shelving	Adjustable glass shelves
Water Filtration	Yes
Air Purification	Air purification system
Energy Star Qualified	Yes
Energy Star Certified	Yes
Door Bins	Adjustable
Configuration	Varies by model (e.g., Side-by-Side, Over-and-Under)
Smart Features	Varies by model (e.g., Wi-Fi connectivity, Mobile App Control)