– 59 –
Main Control Board
J4 Connector (Low-Voltage DC Side)
Pin
Wire Color
Component
Termination
Input/
Output
Pin-to-Pin Voltage Reading
1
Black
Temperature control
Communication
2-way digital communication
2
Red
Temperature control
Output
J4 pin 2 to pin 3 = 12 VDC
3
Blue
Temperature control
Common
J4 pin 2 to pin 3 = 12 VDC
Main Control Board
J5 Connector (Low-Voltage DC Side)
Pin
Wire Color
Component
Termination
Input/
Output
Pin-to-Pin Voltage Reading
1
Pink
ExpressChill™ (CustomCool™)
damper
Input/
Output
J5 pin 1 to pin 2 = 12 VDC
(reversing polarity)
2
Yellow
ExpressChill™ (CustomCool™)
damper
Input/
Output
J5 pin 2 to pin 1 = 12 VDC
(reversing polarity)
3
Brown
ExpressChill™ (CustomCool™)
damper
Input/
Output
J5 pin 3 to pin 4 = 12 VDC
(reversing polarity), if equipped
with dual damper
4
Yellow/Black
ExpressChill™ (CustomCool™)
damper
Input/
Output
J5 pin 4 to pin 3 = 12 VDC
(reversing polarity), if equipped
with dual dampers
5
White
Thermistor supply voltage (5 VDC)
Output
J5 pin 5 to J2 pin 3 = 5 VDC
6
White
CustomCool™ thermistor
Input
N/A
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
)
Main Control Board
J15 Connector (Low-Voltage DC Side)
Pin
Wire Color
Component
Termination
Input/
Output
Pin-to-Pin Voltage Reading
1
Red
Compressor inverter
Output
J 15 pin 1 to J15 pin 2 = 4 to 6 VDC
2
White
Compressor inverter
Output
J 15 pin 2 to J15 pin 1 = 4 to 6 VDC