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Sub-Zero 424HAG/O-2 - Off-Cycle Defrost Control

Sub-Zero 424HAG/O-2
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Page 28
Electronic Control System
Wine Storage
Wine Storage
(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 Trace
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 EVAPORATOR
THERMISTER 3
UPPER EVAPORATOR
THERMISTER 4
MEMBRANE SWITCH
DISPLAY
WINE
CONTROL
BOARD
J2
J1
J8
1
8
LOW VOLTAGE
60 CYCLES
115 VOLTS
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
STARTING RELAY
CONDENSER FAN MOTOR
COMPRESSOR
COMPRESSOR
EVAPORATOR FAN MOTORS
AWECO REF VALVE
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

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