– 58 –
Main Control Board
J2 Connector (Low-Voltage DC Side)
Pin
Wire Color
Component
Termination
Input/
Output
Pin-to-Pin Voltage Reading
1
Blue
Evaporator fan
tachometer
Input
Not applicable to this model.
2
Blue/White
Model
Input
J2 pin 2 to pin 3 = 12 VDC
3
White/Silver
Fan Common
Common
J2 pin 3 to pin 8 = 12 VDC
4
Yellow/Black
Evaporator fan
Output
J2 pin 4 to pin 3 = 9.5 VDC (high),
8 VDC (med), 6.5 (low)
5
Yellow
Condenser fan
Output
J2 pin 5 to pin 3 = 10.5 VDC (high),
7.5 VDC (med), 5.5 VDC (low)
6
Black/White
Fresh food fan
Common
J2 pin 6 to pin 8 = 12 VDC (high),
10 VDC (med), 9 VDC (low)
7
Tan
CustomCool
™ fan
Common
J2 pin 7 to pin 8 = 12 VDC
8
Red
Fan supply voltage
(12 VDC)
Output
J2 pin 8 to pin 3 = 12 VDC
Main Control Board
J3 Connector (Low-Voltage DC Side)
Pin
Wire Color
Component
Termination
Input/
Output
Pin-to-Pin Voltage Reading
1
Red/Yellow
Beverage center
fan
Input
J3 pin 1 to J2 pin 8 = 12 VDC
3
Black
QuickFreeze™ fan
Input
J3 pin 3 to J2 pin 8 = 12 VDC
6
White/Gray
3-way valve
The 3-way valve coil receives 12-VDC pulses from the main
board to change the position of the valve. The pulses come
too quickly to measure with a volt meter.
For test procedure see
3-Way Valve
.
7
Black
3-way valve
8
Yellow
3-way valve
9
Red
3-way valve
10
Orange
3-way valve
Main Control Board
J1 Connector (Low-Voltage DC Side)
Pin
Wire Color
Component
Termination
Input/
Output
Pin-to-Pin Voltage Reading
1
Red/Blue
Fresh food evaporator thermistor
Input
N/A
2
Yellow
Fresh food thermistor
Input
N/A
3
Red/White
Freezer thermistor
Input
N/A
4
Blue/White
Freezer evaporator thermistor
Input
N/A
5
Blue
Thermistor supply voltage (5 VDC)
Output
J1 pin 5 to J2 pin 3 = 5 VDC
1
5
1
10
1
9
J
1
J
5
6
J
3
J
2
1
J4
1
8
Comm
.
2
-
Way
D
i
g
i
ta
l
Comm
. +
12V
Comm
.
Common
FF E
va
p
orator
T
herm
i
stor
FF T
herm
i
stor
FZ T
herm
i
stor
FZ E
va
p
orator
T
herm
i
stor
+
5V
Custom
Coo
l
Dua
l
Dam
p
er
+
Custom
Coo
l
Dua
l
Dam
p
er
-
+
5V
Custom
Coo
l T
herm
i
stor
E
va
p
orator
F
an
(
RPM
)
F
an
Common
E
va
p
orator
F
an
Condenser
F
an
Custom
Coo
l F
an
F
an
+
12V
3
-
Way
Va
l
ve
-
Gray
&
Wh
i
te
3
-
Way
Va
l
ve
-
B
l
ac
k
3
-
Way
Va
l
ve
-
Orange
3
-
Way
Va
l
ve
-
Red
3
-
Way
Va
l
ve
- Y
e
ll
ow
Custom
Coo
l
S
i
ng
l
e
Dam
p
er
-
Custom
Coo
l
S
i
ng
l
e
Dam
p
er
+
F
resh
F
ood
F
an
Mode
l
Se
l
ector
Beverage
Center
F
an
Q
u
i
c
k F
ree
z
e
F
an
Low V
oltage DC
120 V
AC
Mode
l
Se
l
ector
Mode
l
Se
l
ector
Mode
l
Se
l
ector
Mode
l
Se
l
ector
J
15
1
I
nverter
Common
I
nverter
Out
p
ut
(N
ot
Used
for
AC
Com
p
ressor
)
(
Continued next page
)