Bunn G2 Service Manual

CLEANING LEVERGROUNDCOFFEE1. Select the desired grind.2. Lift the lid and pour coffee beans into the hopper.3. Slip bag under the chute. Rest the bag

104. Disconnect the grinder from the power source. If voltage is present as described, proceed to #5. If voltage is not present as described, ref

11SERVICE (cont,)AC MOTOR AND GRIND CHAMBER (cont.)WHI/BLU toRelay N.O.(K4)WHI to Cordset (120V)RED/BLK to Cordset (230V)GRN to Ground (120V)GRN/YEL t

12SERVICE (cont.)3. Remove the two .250”-20 screws (1) securing the grind selector dial plate (18) to the grind housing.4. Slide burr auge

1317. Install grind selector dial plate (18) with adjusting screw w/bearing (19) onto the grind chamber and secure with two .250”-20 screws (1).18.

14SERVICE (cont,)DC MOTOR AND GRIND CHAMBER - G1MD ONLY (cont.) BLU to BLU from Rectifier BLU to WHI/BLU fromRelay (3)RED to Rectifier (-)BLK to

15SERVICE (cont,)DC MOTOR AND GRIND CHAMBER - G1MD ONLY (cont.) FIG. 9 MOTOR AND GRIND CHAMBER REMOVALP17115 7 61618 1 19

16Location: The Off/On/Start switch is located in the up-per front wrapper above and to the right of the grind selector knob (left side when viewed f

17+ACACSERVICE (cont.)Removal and Replacement:1. Disconnect the wires from the rectifier.2. Remove the #10-32 screw securing the rectifier to the moto

18Location: The relay is located on the grinder base inside the lower housing.Test Procedure:1. Disconnect the grinder from the power source and pl

19WHI/BLU fromMotor to Relay K-4WHI/ORN from Bag Sensor Switch (A)or(1)WHI/ORN from Bag Sensor Switch (A)or(1)WHI/BLU fromMotor to Relay K-4WHI/RED fr

210191 070306BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTYBunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:1) All equipment oth

20WHI/VIO WHI/VIO WHI/BLU WHI/ORA 1 or A GRN L1 N SW1 BLK WHI/RED SW2 K 0 or B M L1 L2 120 VOLT AC 2 WIRESINGLE PHASE 60 HZ WHI WHI K-2 or K-7 K-8

21WHI/VIO WHI/VIO WHI/BLU WHI/ORA SCHEMATIC WIRING DIAGRAM G1A, G2A & G3AGRN/YEL L1 L2 SW1 BLK WHI/RED WHI/RED SW2 N.O. N.O. M L1 L2 RED (230V) RE

3SPECIAL REGULAR ELEC PERC AUTOMATIC DRIP FINE ESPRESSO TURKISH TURKISH COARSE

4ELECTRICAL REQUIREMENTSThe 120 volt and 240 volt grinders have an attached cordset and requires 2-wire, grounded service rated 120 volts ac and 240 v

5COFFEE GRINDING1. Turn the selector knob to align the red arrow with the desired grind.2. Raise the top lid and add the whole bean coffee. Close th

6A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after

7PROBABLE CAUSE3. Bag Sensor. (cont.)4. Motor overload protector.1. Off/On/Start Switch2. Bag Sensor3. RelayTROUBLESHOOTING (cont.)PROBLEMGrinder will

8TROUBLESHOOTING (cont.)PROBABLE CAUSE1. Hopper2. Entrance to grind chamber3.Shear Plate PROBLEMGrinder starts, but will not dis-pense.REMEDYCoff

9CONTENTSBag Sensor Switch ............9Motor and Grind Chamber (AC) .......10Motor and Grind Chamb