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Sub-Zero
Wine Cooler
427G-2
Sub-Zero 427G-2 User Manual
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Page 28
Electronic Control System
Wine S
torage
Wine S
torage
(400-
(400-
2
2
)
)
Series
Series
3-12
#3758410 - Revision C - May
, 2014
Monitor and Control Off-cycle Defrost
Since High Offset (Cut-in) is governed by the evaporator temperature, the refrigeration system cannot be energized
until evaporator temperatures exceed 39°F / 4°C, with a 38°F/3°C set-point, and/or exceed 66°F / 19°C, with a
65°F/18°C set-point.
Figure 3-18. Off-cycle Defrost Signal T
race
BLUE W/WHITE
BLUE W/WHITE
BLUE W/BLACK
BLUE W/BLACK
BLUE W/RED
ORANGE W/RED
BLUE W/YELLOW
ORANGE W/YELLOW
WHITE W/RED
WHITE W/BLUE
GRAY W/WHITE
THERMISTER 1
LOWER CABINET
UPPER CABINET
THERMISTER 2
LOWER EV
APORA
TOR
THERMISTER 3
UPPER EV
APORA
TOR
THERMISTER 4
MEMBRANE SWITCH
DISPLA
Y
WINE
CONTROL
BOARD
J2
J1
J8
1
8
LOW VOL
T
AGE
60 CYCLES
1
15 VOL
TS
GREEN/YELLOW
J3
CONTROL
BOARD
BLACK
E3
14
E1
E2
WINE
J8
2
8
J1
J2
1
L1
OVERLOAD PROTECTOR
GRAY
WHITE
PINK
BROWN
TAN
ORANGE
ORANGE
PINK
ST
ARTING RELA
Y
CONDENSER F
AN MOTOR
COMPRESSOR
COMPRESSOR
EV
APORA
TOR FAN MOT
ORS
AWECO REF V
AL
VE
LIGHTS
680 Ω
LOWER
LIGHTS
NEUT
WHITE
UPPER
E1
E3
E2
BLUE
BLUE
N.O.
N.O.
N.C.
PINK
BLUE
1
14
J3
1
2
M
M
M
M
No cooling called for
Refrigeration system not energized;
evaporators defrost
27
29
Table of Contents
Important Safety Information
2
General Information
2
Wine Storage
2
Warranty Information
3
Model Descriptions
4
Wine Storage Unit Maximum Temperature
6
Installation Considerations
7
Anti-Tip Components Installation
7
Unit Leveling
8
Anti-Tip Components
8
Countertop Bracket
8
Leveling Legs
8
Molding & Brackets
9
Kickplate/Grille Removal
9
Adjusting Front Leveling Legs
9
Adjusting Rear Levelers
9
Anchoring Screws Removal
10
Kickplate Removal
10
Door Adjustment
11
Door And/Or Drawer Adjustment
11
Door Stop Adjustment
12
Door Stop Installation
12
Door Panel Removal and Installation (All Models)
13
To Remove a Stainless Steel Panel
13
To Remove the Door
13
Door Closer Removal
13
Overlay Door Panel Removal and Installation
14
To Remove an Overlay Panel
14
Poly Tape Removal
14
Overlay Door Panel Removal
14
Drawer Panel Removal and Installation (427R-2)
15
Framed & Overlay Door Panel Removal / Installation
17
Wine Storage Electronic Control Terminology & Component Descriptions
18
Basic Wine Storage Electronic Control System
19
Wine Storage Control Board Layout and Summary Table
20
Wine Storage Control Panel Layout
21
Basic Wine Storage Input Operations
21
Unit ON/OFF
21
Adjusting Set-Points (Temperature Adjustments)
22
Lighting System ON/OFF
22
Alarm “BELL” ON/OFF (Temperature Alarm)
22
Unique Wine Storage Input Operations
23
Sabbath Mode (Lights off Mode)
24
Showroom Mode
24
Switch Unit off First
24
Initiate Sabbath Mode, Press and Hold UNIT ON/OFF Key for 10 Seconds
24
Function of the Wine Storage Electronic Control System
25
Supply Power to the Lighting System
25
Display Average Compartment Temperatures
26
Monitor and Control Off-Cycle Defrost
28
Off-Cycle Defrost Signal Trace
28
Possible Wine Storage Error Indicators
29
Warm Temperature Alarm
29
Cold Temperature Alarm
30
Thermistor Malfunction Error Indicators
31
Wine Storage Troubleshooting Input Operations
32
Diagnostic Mode
32
Diagnostic Mode Indicators
33
Clearing Error Codes
33
Wine Storage Error Code Table
33
Manual Valve Activation Mode
34
Temperature Log Recall Mode
35
Temperature Log Event Indicators
36
Wine Storage Temperature Log Index Chart
37
Electronic Control Terminology & Component Descriptions
38
Model 427R-2 Refrigerator Section Electronic Control System Overview
39
High Voltage
39
Low Voltage
39
Control Board Layout and Summary Table
40
Main Control Board Summary
40
Main Control Board Layout
40
Refrigerator Section Control Panel Layout
41
427R-2 Refrigerator Control Panel Layout
41
Model 427R-2 Refrigerator Section Basic Input Operations
42
Adjusting Set-Point (Temperature Adjustments)
42
Drawer Ajar Alarm ON/OFF
43
Temperature Units Selection Mode
43
Sabbath Mode
44
Functions of Model 427R-2 Ref. Section Electronic Control System
45
Display Zone Temperatures
45
High Voltage
45
Regulate Zone Temperature and Fan-Assisted Off-Cycle Defrost
46
Monitor Compressor Run Duration, Displays if Service Is Needed
47
Signal Trace Schematic - Compressor Run
47
Possible 427R-2 Refrigerator Section Error Indicators
48
Manual Component Activation Mode
51
Temperature Log Index Chart
55
Model Configuration Mode
56
Manual Entry Model Configuration Mode
57
4
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Sub-Zero 427G-2 Specifications
General
Brand
Sub-Zero
Model
427G-2
Category
Wine Cooler
Language
English
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