Wolf Sub-Zero ICB400 Series Service Manual page 37

Electronic Control System
MODEL ICB427 REFRIGERATOR SECTION
CONTROL BOARD LAYOUT AND SUMMARY TABLE
Electrical connection points on the control board are labeled alphanumerically. These labels correspond with the
alphanumeric summary table, located on the wiring diagram. By referencing the summary table, it is possible to
identify which components are connected at which points on the main control board. Below is a layout diagram of
the control board, and a copy of the summary table.
NOTE: All components on the control board are non-replaceable. If a problem with the control board is identified,
the complete control board must be replaced.
NOTE: There is also a small PC board in the control panel assembly (Not Shown). All components in the control
panel assembly are non-replaceable. If a problem with the control panel is identified, the complete control panel
assembly must be replaced.
TERMINAL
HIGH VOLT CIRCUITS
P4
P3
P1 COMPRESSOR
P2
J3-1
J3-2
J3-3
J3-4
J3-5
J3-6
J3-7
J2-1
J2-2
J2-3
J2-4
LOW VOLTAGE THERMISTOR CIRCUITS
J5-1,2
J5-3,4
J5-5,6
J5-7
J5-8
J6-1
J6-2
J6-3
J4-1
J4-2
J4-3
J4-4
J4-5
J4-6
7011544 - Revision A - November, 2008
International W
International W
Figure 3-43. Main Control Board Layout
MAIN CONTROL BOARD SUMMARY
CIRCUIT DESCRIPTION
LN NEUTRAL
L1 POWER IN
COMPRESSOR
DEFROST DEFROST HEATER
FAN 1 EVAPORATOR FAN
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
LIGHTS LIGHTS
NOT USED
UPR
DRAWER LIGHT SENSE
NOT USED
NOT USED
NOT USED
UPPER
REFRIGERATOR COMPARTMENT
EVAP EVAPORATOR
EVAPORATOR
EVAP
NOT USED
NOT USED
NOT USED
DISPLAY DISPLAY WIRING
DISPLAY DISPLAY WIRING
DISPLAY DISPLAY WIRING
DISPLAY DISPLAY WIRING
DISPLAY DISPLAY WIRING
DISPLAY DISPLAY WIRING
Figure 3-44. Control Board Summary Table
ine Storage
ine Storage
(See Figures 3-43 & 3-44)
MAIN
BOARD
FUNCTION
NEUTRAL INTO BOARD
POWER INTO BOARD
POWERS COMPRESSOR AND CONDENSER FAN
POWERS DEFROST CIRCUIT AND FILL TUBE HEATER
POWERS EVAPORATOR FAN
POWERS LIGHTS
SENSES IF DRAWER OPEN
SENSES REFER CABINET TEMPERATURE
SENSES EVAPORATOR TEMPERATURE
SENSES EVAPORATOR TEMPERATURE
12VDC POWER SUPPLY FOR DISPLAY BOARD
12VDC POWER SUPPLY FOR DISPLAY BOARD
SERIAL DATA RECEIVE
SERIAL DATE TRANSMIT
GROUND FOR DISPLAY BOARD POWER SUPPLY
GROUND FOR DISPLAY BOARD POWER SUPPLY
3-24
Series
Series
(ICB400)
(ICB400)
COLOR
WHITE
BLACK
PURPLE
BLUE
RED
YELLOW
ORANGE
BLUE/WHITE
BLUE/YELLOW
BLUE/YELLOW
BLACK
WHITE
RED
YELLOW
ORANGE
BLUE