Bunn ULTRA-1 SERVICEcont AUGER MOTORS, Auger Motors, Motor Coil Resistance, Auger Motor Terminals

Models: ULTRA-1

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SERVICE(cont.)

SERVICE(cont.)

AUGER MOTORS

ULTRA-2 shown

FIG. 1 AUGER MOTORS

P1341

 

Location

The auger motors are located at the upper rear of the dispenser chassis inside the auger motor covers.

Test Procedures

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: The compressor start capacitor must be properly discharged before removing. This is most commonly done on low voltage capacitors by shorting across the terminals with a screwdriver.

Removal and Replacement

1.Remove the two #8 locking screws securing the auger motor cover to the cooling drum mount assembly.

2.Remove the cover and set aside for reassembly.

3.Remove the #8 locking screw on the lower right side of the auger motor mounting bracket securing the auger motor run capacitor. Set capacitor aside with wires at- tached.

4.Disconnect the auger motor terminal from the terminal on the main wiring harness.

5.Remove the three remaining #8 locking screws secur- ing the auger motor mounting bracket to cooling drum mounting bracket.

6.Remove motor with mounting bracket, drip tray, split pin and torsion spring bearing as an assembly.

NOTE: When removing or installing the motor be sure the split pin in the motor shaft is turned to a position that will clear the torque sensor circuit board.

7.Install new motor with mounting bracket, drip tray, split pin and torsion spring bearing using three #8 locking screws onto the cooling drum bracket.

8.Install the auger motor capacitor on the lower right side of the auger mounting bracket, using the remaining #8 locking screw.

9.Connect the auger motor terminal to the terminal on the main wiring harness.

10.Refer to Fig. 2 when reconnecting the wires.

ULTRA-2 LEFT AUGER MOTOR

J1-1 BRN/WHI to Left Auger Motor Capacitor

J1-2 BRN/BLK to J5-3 of Control Board

J1-3 WHI to Main Harness

ULTRA-2 RIGHT AUGER MOTOR

J1-1 WHI/RED to Right Auger Motor Capacitor

J1-2 RED/BLK to J5-1 of Control Board

J1-3 WHI to Main Harness

J1-1

Boost Coil

ULTRA-1 AUGER MOTOR

J1-1 BRN/WHI to Auger Motor Capacitor

J1-2

Run Coil

J1-2 BRN/BLK to J10-9 of Control Board

J1-3

Common

J1-3 WHI to Main Harness

 

 

FIG. 2 AUGER MOTOR TERMINALS

MOTOR COIL RESISTANCE

J1-3 to:

J1-1 = 58 ohms

J1-2 = 58 ohms

WHITE

BLACK

RED

23

41084 102709

 

Page 23
Image 23
Bunn ULTRA-1 manual SERVICEcont AUGER MOTORS, Auger Motors, Motor Coil Resistance, Auger Motor Terminals