Bunn Ultra NX Service & Repair Manual page 64

CONTROL BOARD INPUT AND OUTPUT CHART
J12-2pin Connector -Power Supply Input 24VDC
J14-14pin Connector Main Harness - Low Voltage
J15-12pin Connector for Main Harness - Line Voltage
CONNECTOR &
PIN NUMBER
J12-1
J12-2
J14-1
J14-2
J14-3
J14-4
J14-5
J14-6
J14-7
J14-8
J14-9
J14-10
J14-11
J14-12
J14-13
J14-14
J15-1
J15-2
J15-3
J15-4
J15-5
J15-6
J15-7
J15-8
J15-9
J15-10
J15-11
J15-12
* Temperature sensor disconnected you will read 5VDC, but when connected, voltage will
vary according to real time temperature. Reference Service -Temperature Sensor section.
WIRE COLOR INPUT/OUTPUT
WHT/RED
WHT/BLK
WHI/BLK
WHI/BLU
BRN
WHI/YEL
YEL
BLU
WHT/BLK
WHT/GRAY
WHT/GRN
TAN
PINK
VIOLET
WHI/VIOLET
ORG
RED/BLK
BRN/WHT
BRN/BLK
BLK
WHI
Not Used
WHI/RED
WHI/YEL
WHI/RED
GRAY
BRN
RED
DESCRIPTION
Input/+ Control Board
Input/- Control Board
Input
Output/+ 24VDC Rated Parts
Input/Signal Left Thermistor
Input/Signal Right Thermistor
Input/Signal Hot Gas Thermistor
Output/+ Torque Sensor
Input
Input/Signal Left Torque
Input/Signal Right Torque
Input Left Level Sensor
Input Right Level Sensor
Output/- Left Hopper Lights
Output/- Right Hopper Lights
Output/- Compressor Relay
Output Right Forward Auger
Output Left Reverse Auger
Output Left Forward
Supply/L1
Neutral/L2
Not Used
Output Right Reverse Auger
Output Left PTC Heater
Output Right PTC Heater
Output
Output Left Refrig. Valve
Output Right Refrig. Valve
64
VOLTAGE
Ground 5.0VDC
*1.0 - 5.0VDC
*1.0 - 5.0VDC
*1.0 - 5.0VDC
5.0VDC
Ground 5.0VDC
0 - 5VDC
0 - 5VDC
5.0VDC
5.0VDC
120 or 230VAC
120 or 230VAC
Auger 120 or 230VAC
L1 120 or 230VAC
Neutral 120 or 230VAC
Not Used Not Used
120 or 230VAC
Fan 120 or 230VAC
120 or 230VAC
120 or 230VAC
24VDC
24VDC
24VDC
24VDC
24VDC
24VDC
24VDC
24VDC
continued >