Left & Right Auger Motor - Bunn Ultra NX Service & Repair Manual

Left and Right Auger Motors
FIG. 9 AUGER MOTOR
Location:
The auger motors are located at the upper rear
of the dispenser chassis behind the auger motor
cover.
Rear Cover Removal:
1. Remove 4 screws securing rear cover.
2. Grab cover and pull away from machine.
Test Procedures:
Option 1:
1. Remove the hopper from the same side as the
motor to be tested.
2. Turn "ON" the appropriate auger switch.
3. Nudge the auger to start it turning.
If the auger doesn't turn, replace the motor.
If auger starts to turn, replace the start
capacitor.
WARNING: All new, old or defective capacitors
need to be treated as they hold a "charge" and
can be harmful. Before testing a capacitor, safely
discharge the capacitor.
Option 2:
1. Enter the software program and scroll to main
"Service Tools" menu.
2. Press the "Right Dot" switch to answer "Yes".
3. Press the "Center Dot" switch to advance onto
"Test Outputs" menu.
SERVICE - REAR COVER COMPONENTS
4. Press the "Right Dot" switch to answer "Yes".
5. Press the "Center Dot" switch to scroll through
the menus until "Test Augers?" menu is
displayed.
6. Press the "Right Dot" switch to answer "Yes" to
enter "Left Auger Test" menu.
NOTE: The "Left Auger Test & Right Auger Test"
menu will allow the operator or technician to test
the Forward and Reverse operation of the auger
motor.
7. Press the "Right Dot" switch to start Forward ro-
tation of the auger motor, press "Right Dot" again
to start Reverse rotation of the auger motor.
8. Press the "Center Dot" to go to "Right Auger Test"
menu.
9. Press the "Right Dot" switch to start Forward
rotation of the auger motor, press "Right Dot"
again to start Reverse rotation of the auger
motor.
Forward rotation and no reverse rotation, relay
(reverse) is defective on CBA, replace control
board.
Reference: Control Board Triac Diagram
Control Board/Relay 1 - Left Auger Motor
Control Board/Relay 2 - Right Auger Motor
LEFT AUGER MOTOR
J1-1 BLK to Left Auger Motor Capacitor and
J15-2 BRN/WHI wire.
J1-2 GRAY or RED to Left Auger Motor
Capacitor and J15-3 BRN/BLK wire.
J1-3 WHI to Main Harness.
RIGHT AUGER MOTOR
J1-1 BLK to Right Auger Motor Capacitor and
J15-7 WHI/ED wire.
J1-2 GRAY or RED to Right Auger Motor
Capacitor and J15-1 RED/BLK wire.
J1-3 WHI to Main Harness
J1-1 Boost Coil
J1-2 Run Coil
J1-3 Common
FIG. 10 AUGER MOTOR TERMINALS
33 continued >