Bunn G2 TRIFECTA, G9, G9WD, LPG-2, G9-2, FPG-2, G9-2T DBC User Manual

6.46 Mb

GRINDERS

Includes: MHG, FPG,

FPG-2, LPG-2, G1, G2, G3,

G2 trifecta™, G9, G9WD,

G9-2 & G9-2T DBC

SERVICE & REPAIR MANUAL

BUNN-O-MATIC CORPORATION

POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227

PHONE: (217) 529-6601 FAX: (217) 529-6644

To ensure you have the latest revision of the Operating Manual, or to view the Illustrated Parts Catalog, Programming Manual, or Service Manual, please visit the Bunn-O-Matic website, at www.bunn.com. This is absolutely FREE, and the quickest way to obtain the latest catalog and

manual updates. For Technical Service, contact Bunn-O-Matic Corporation at 1-800-286-6070.

41545.0000C 11/11 ©2009 Bunn-O-Matic Corporation

BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY

Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:

1)All equipment other than as specified below: 2 years parts and 1 year labor.

2)Electronic circuit and/or control boards: parts and labor for 3 years.

3)Compressors on refrigeration equipment: 5 years parts and 1 year labor.

4)Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis: parts and labor for 3 years or 30,000 pounds of coffee, whichever comes first.

These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be commercially free of defects in material and workmanship existing at the time of manufacture and appearing within the applicable warranty period. This warranty does not apply to any equipment, component or part that was not manufactured by BUNN or that, in BUNN’s judgment, has been affected by misuse, neglect, alteration, improper installation or operation, improper maintenance or repair, damage or casualty. This warranty is conditioned on the Buyer 1) giving BUNN prompt notice of any claim to be made under this warranty by telephone at (217) 529-6601 or by writing to Post Office Box 3227, Springfield, Illinois 62708-3227; 2) if requested by BUNN, shipping the defective equipment prepaid to an authorized BUNN service location; and 3) receiving prior authorization from BUNN that the defective equipment is under warranty.

THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR ORAL, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. The agents, dealers or employees of BUNN are not authorized to make modifications to this warranty or to make additional warranties that are binding on BUNN. Accordingly, statements by such individuals, whether oral or written, do not constitute warranties and should not be relied upon.

If BUNN determines in its sole discretion that the equipment does not conform to the warranty, BUNN, at its exclusive option while the equipment is under warranty, shall either 1) provide at no charge replacement parts and/or labor (during the applicable parts and labor warranty periods specified above) to repair the defective components, provided that this repair is done by a BUNN Authorized Service Representative; or 2) shall replace the equipment or refund the purchase price for the equipment.

THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS EQUIPMENT, WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AT BUNN’S SOLE OPTION AS SPECIFIED HEREIN, TO REPAIR, REPLACEMENT OR REFUND.

In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any other special, incidental or consequential damages.

392, AutoPOD, AXIOM, BrewLOGIC, BrewMETER, Brew Better Not Bitter, BrewWISE, BrewWIZARD, BUNN Espress, BUNN Family Gourmet, BUNN Gourmet, BUNN Pour-O-Matic, BUNN, BUNN with the stylized red line, BUNNlink, Bunn-OMatic, Bunn-O-Matic, BUNNserve, BUNNSERVE with the stylized wrench design, Cool Froth, DBC, Dr. Brew stylized Dr. design, Dual, Easy Pour, EasyClear, EasyGard, FlavorGard, Gourmet Ice, Gourmet Juice, High Intensity, iMIX, Infusion Series, Intellisteam, My Café, Phase Brew, PowerLogic, Quality Beverage Equipment Worldwide, Respect Earth, Respect Earth with the stylized leaf and coffee cherry design, Safety-Fresh, savemycoffee.com, Scale-Pro, Silver Series, Single, Smart Funnel, Smart Hopper, SmartWAVE, Soft Heat, SplashGard, The Mark of Quality in Beverage Equipment Worldwide, ThermoFresh, Titan, trifecta, Velocity Brew, A Partner You Can Count On, Air Brew, Air Infusion, Beverage Bar Creator, Beverage Profit Calculator, Brew better, not bitter., BUNNSource, Coffee At Its Best, Cyclonic Heating System, Daypart, Digital Brewer Control, Nothing Brews Like a BUNN, Pouring Profits, Signature Series, Tea At Its Best, The Horizontal Red Line, Ultra are either trademarks or registered trademarks of Bunn-O-Matic Corporation.

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CONTENTS

Warranty and Trademark.................................................................................................

3

Introduction.....................................................................................................................

4

Recommended Daily Cleaning.........................................................................................

4

G9WD Packaging & Shim Removal.................................................................................

5

Operating Controls..........................................................................................................

6

Troubleshooting.............................................................................................................

10

Service..........................................................................................................................

14

Component Access............................................................................................

14

Bag Sensor........................................................................................................

15

Motor and Grind Chamber.................................................................................

16

Capacitor...........................................................................................................

30

Circuit Breaker...................................................................................................

31

Hopper Selector Switch.....................................................................................

32

Off/On/Start Switch............................................................................................

34

Urn/Carafe Selector Switch................................................................................

35

Batch Selector Switch........................................................................................

36

Potentiometer....................................................................................................

37

Rectifier.............................................................................................................

38

Relay.................................................................................................................

39

Hopper Slide Plates...........................................................................................

43

Solenoid............................................................................................................

45

Timer.................................................................................................................

46

Control Board....................................................................................................

50

Membrane Switch..............................................................................................

52

EMI Filter...........................................................................................................

54

Funnel Sensing Coil...........................................................................................

55

Memory Clock Board.........................................................................................

56

Display Board....................................................................................................

57

Wiring Schematics........................................................................................................

58

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INTRODUCTION

The Grinder will store various amounts of whole bean coffee and grind it to a preset grind and amount into an awaiting funnel and filter or French Press from most commercial drip coffee brewers. The equipment is only for indoor use on a sturdy counter or shelf. Adequate space must be available above the grinder to raise the lid when adding beans. Use only with whole bean coffee.

The grind is preset at the factory to drip specifications as set forth by the United States Department of Commerce and adopted by the Coffee Brewing Center of the Pan American Coffee Bureau. Adjustments may be made to alter both the amount and grind from the factory setting. Refer to the Installation & Operating Manuals for

ADJUSTMENTS.

RECOMMENDED DAILY CLEANING

The use of a damp cloth rinsed in any mild, nonabrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic equipment. Care should be taken not to scratch the hopper or windows with any

abrasive material. Regular cleaning will keep your grinder looking new for years. Refer to the Installation & Operating Manuals for CLEANING.

CAPACITY CHART

FPG, LPG.................................

Six pounds

FPG-2......................................

Three pounds in each hopper

MHG........................................

Five pounds in each hopper

G9............................................

Nine pounds

G9-2, G9-2T DBC.....................

Six pounds in each hopper

G9WD......................................

Five pounds

G1............................................

One pound

G2............................................

Two pounds

G3............................................

Three pounds

G2 trifecta................................

Two pounds

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G9 WD - Packaging & Shim Removal

WARNING

MUST BE COMPLETED BY AUTHORIZED SERVICE PERSONNEL.

DO NOT PLUG IN !

SEE INSTRUCTIONS BELOW BEFORE USING !

Step 1 - Remove & discard tape holding funnel arm in place. (Figure 1) Step 2 - Remove & discard two silicon tubes between funnel guide &

housing. (Figure 2)

Step 3 - Remove four screws in front housing panel. (Figure 3) Step 4 - Remove & discard shim under transducer. (Figure 4) Step 5 - Replace housing panel and secure four screws. (Figure 3)

Figure 1

 

Figure 2

 

 

 

Figure 3

 

Figure 4

 

 

 

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OPERATING CONTROLS

 

Model G9WD

d

c

Grind Pad (a)

 

 

Pressing initiates a grind cycle.

 

 

Stop Pad (b)

 

b

Pressing ends the operation of the grinder.

e

® Pad (c)

 

 

Pressing the copyright pad allows programming access.

a

 

Pads (d)

 

 

“Hidden” buttons used to navigate setup and programming menus.

Pads (e)

Press button to select small, medium or large batch size.

Model G9-2

Off/On/Start Switch

OFF - (upper position) Switching to this position stops all operation of the grinder.

ON - (middle position) The switch will return to this position after a grind cycle has begun and will remain in this position after grinding has ceased.

START - (lower, momentary position) Pressing the switch initiates a timed grind cycle.

Hopper Selector Switch

Left - Switching to this position allows beans to be dispensed from the left hopper.

Right - Switching to this position allows beans to be dispensed from the right hopper.

Batch Selector Switch (Optional)

Urn - Switching to this position allows the correct amount of beans to be

dispensed when grinding a large batch.

CARAFE - Switching to this position allows the correct amount of beans to be dispensed when grinding a small batch.

P633

Dispense Timer

The dispense timer controls the amount of beans that will leave the hopper in a grind cycle. The timer can be adjusted to dispense a different amount from each hopper. The scale is from 0.4 to 150.0 seconds. Refer to the Installation & Operating Manuals for Adjustments.

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OPERATING CONTROLS (Continued)

Model G9

Off/On/Start Switch

OFF - (left position)

Placing the switch in this position stops the operation of the grinder. ON - (center, resting position)

The switch will return to this position after a grind cycle has begun and will remain in this position after grinding has ceased.

START - (right, momentary position)

Placing the switch in this position initiates a timed grind cycle.

URN

ON

O

S

T

F

A

F

R

 

T

CARAFE

P1300

Batch Selector Switch (Optional)

URN - Switching to this position allows the correct amount of beans to be dispensed when grinding a large batch. CARAFE - Switching to this position allows the correct amount of beans to be dispensed when grinding a small

batch.

Models G1, G2, G3 & G2 trifecta

Off/On/Start Switch

OFF - (upper position)

Switching to this position stops the operation of the grinder. ON - (center, resting position)

The switch will return to this position after a grind cycle has begun and will remain in this position after grinding has ceased. START - (lower, momentary position)

Pressing the switch initiates grinding only when a bag is in place behind the chute.

Grind Selector

Allows the user to vary the grind for each bag of coffee. Each setting will provide precisely the same grind every time it is selected.

Bag Sensor

Prevents the grinder from operating unless the back of a bag is in place behind the dispense chute.

Do not attempt to bypass this safety device.

Models LPG, LPG-2E

Off/On/Start Switch (Models LPG and LPG-2E)

OFF - (upper position) Switching to this position stops all operation of the grinder.

ON - (middle position) The switch will return to this position after a grind cycle has begun and will remain in this position after grinding has ceased.

START - (lower, momentary position) Pressing the switch to this position and releasing initiates a grind cycle.

Hopper Selector Switch (Model LPG-2E only)

LEFT - Switching to this position allows beans to be ground from the left hopper. RIGHT - Switching to this position allows beans to be ground from the right hopper.

7

P1028

P1029

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OPERATING CONTROLS (Continued)

Model MHG

Grind Pad (a)

Pressing initiates a timed grind cycle.

Stop Pad (b)

Pressing ends the operation of the grinder.

® PAD (c)

Pressing the ® pad allows programming access.

c

d

d

 

a

b

 

Hopper/Batch Selector Pads (d)

These pads are located on the funnel depictions on each side of the grinder with a total of 6 pads. Selecting one of these pads will select the amount of grind and side from which to grind.

Example: Selecting the lower pad on the left side will grind enough beans from the left hopper of the grinder to brew the amount programmed into grinder.

Control Board

The control board determines the amount of beans that will leave the hopper in a grind cycle. The timer portion can be adjusted to dispense a different amount from each hopper and each batch size. The scale is from 0.4 to 99.9 seconds. Refer to the Installation & Operating Manuals for Adjustments.

Model G9-2T DBC

Grind Pad (a)

d

Pressing initiates a timed grind cycle.

Stop Pad (b)

 

Pressing ends the operation of the grinder.

a

® PAD (c)

Pressing the ® pad allows programming access. e

c

d

b

Hopper/Batch Selector Pads (d)

These pads are located on the funnel depictions on each side of the grinder with a total of 6 pads. Selecting one of these pads will select the amount of grind and side from which to grind.

Example: Selecting the lower pad on the left side will grind enough beans from the left hopper of the grinder to brew the amount programmed into grinder.

Power ON/OFF Pad (e) (100V Models)

Pressing the ON/OFF pad alternately turns the grinder on and off.

Control Board

The control board determines the amount of beans that will leave the hopper in a grind cycle. The timer portion can be adjusted to dispense a different amount from each hopper and each batch size. The scale is from 0.4 to 99.9 seconds. Refer to the Installation & Operating Manuals for Adjustments.

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OPERATING CONTROLS (Continued)

Model FPG

Off/On/Start Switch

OFF - (upper position) Switching to this position stops all operation of the grinder.

ON - (middle position) The switch will return to this position after a grind cycle has begun and will remain in this position after grinding has ceased.

START - (lower, momentary position) Pressing the switch to this position and releasing initiates a grind cycle.

Batch Selector Switch

Select Small, Medium or Large batch by turning the round selector knob on the left front of the grinder.

P2947

P2947

Model FPG-2 DBC

Grind Pad (a)

Pressing GRIND initiates a timed grind cycle.

Stop Pad (b)

Pressing STOP ends the operation of the grinder.

® PAD (c)

Pressing the ® pad allows programming access (see page 5).

c

d

d

a

b

Hopper/Batch Selector Pads (d)

These pads are located on the funnel depictions on each side of the grinder with a total of 6 pads. Selecting one of these pads will select the amount of grind and side from which to grind.

Example: Selecting the lower pad on the left side will grind enough beans from the left side of the grinder to brew the amount programmed into grinder.

Control Board

The control board determines the amount of beans that will leave the hopper in a grind cycle. The timer portion can be adjusted to dispense a different amount from each hopper and each batch size. The scale is from 0.4 to 99.9 seconds. Refer to the Installation & Operating Manuals for Adjustments.

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TROUBLESHOOTING

A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Service Department.

Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel.

All electronic components have ac voltage and dc voltage potential on their terminals. Shorting of terminals or the application of external voltages may result in board failure.

Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be permanent.

If an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a terminal or crimp.

Make certain that all electrical connections are tight and isolated.

WARNING

Exercise extreme caution when servicing electrical equipment.

Turn power OFF when servicing, except when electrical tests are specified.

Follow recommended service procedures.

Replace all protective shields or safety notices.

Problem

Probable Cause

Remedy

Grinder will not start.

1. No power or incorrect voltage

(A) Plug-in the grinder.

 

 

(B) Check the voltage at the wall

 

 

outlet with a voltmeter. It must be

 

 

120 volts ac for 120 volt models,

 

 

100 volts for 100 volt models, and

 

 

230 volts for 230 volt models.

 

2. Off/On/Start switch

(A) Momentarily press the Off/On/

 

 

Start switch to the “START” posi-

 

 

tion.

 

 

(B) Refer to Service - Off/On/Start

 

 

switch for testing procedures.

3. Circuit Breaker (Not applicable on Model LPG with capacitor)

Press the “Reset” button, located on rear of the grinder. Listen carefully for a “click”. This resets the motor protection circuit and indicates that an overload may have been encountered by the motor. (An overload can occur when something other than coffee is inserted into the hopper for grinding). Refer to Service - Circuit Breaker for testing procedure.

4. Timer

Refer to Service - Timer for testing

 

procedures.

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TROUBLESHOOTING (cont.)

Problem

Probable Cause

Remedy

Grinder will not start. (Continued)

5. Motor

Each motor is equipped with a

 

 

temperature and current overload

 

 

protection feature which will im-

 

 

mediately shut off the motor when

 

 

an overload has occurred. Check

 

 

the grinder for obstructions. Refer

 

 

to Service - Motor for testing pro-

 

 

cedures.

 

6. Relay

Refer to Service - Relay for testing

 

 

procedures.

 

7. Bag sensor or Cup Sensor

(A) The receiving bag must be placed

 

 

on the tray screen and have the back

 

 

of the bag behind the dispense chute

 

 

to activate the sensor switch.

 

 

(B) Refer to Service - Bag Sensor

 

 

Switch for testing and adjustment

 

 

procedures.

Grinder will not shut off.

1. Off/On/Start switch

(A) Place the switch in the “OFF”

 

 

upper position.

 

 

(B) Refer to Service - Off/On/Start

 

2. Timer

Switch for testing procedures.

 

Refer to Service - Timer for testing

 

 

 

3. Relay

procedures.

 

Refer to Service - Relay for testing

 

 

 

4. Bag Sensor or Cup Sensor

procedures.

 

(A) Remove bag from under the

 

 

 

 

dispense chute.

 

 

(B) Refer to Service - Bag Sensor

 

 

Switch for testing procedures.

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Problem

Probable Cause

Remedy

Grinder starts, but will not dispense

1.

Hopper(s)

Begin each grind cycle by visually

from hopper.

 

 

inspecting the hopper(s) for ample

 

 

 

supplies of whole bean coffee.

 

2.

Blockage of hopper(s)

Foreign materials must not block

 

 

 

the openings at the bottom of the

 

 

 

hopper(s).

3.Slide Gate Solenoids (Model LPG2E only)

4.Timer

5.Off/On/Start switch

6.Slide plates

7.Solenoids

8.Solenoid Limit Thermostat

9.Shear Plate

Refer to Service - Solenoids for testing procedures.

Refer to Service - Timer for testing procedures.

Refer to Service - Off/On/Start switch for testing procedures.

(A)Check to see that the slide plates move freely to allow beans to travel into the grind chamber.

(B)Refer to Service -Slide Plates for testing procedures.

Refer to Service - Solenoids for testing procedures.

Refer to Service - Solenoids for testing procedures.

Remove both black fillister head screws holding the grinder selector dial plate to the grinder. Carefully remove the dial plate and rotor cup. Inspect the shear plate for wear. Replace if excessively worn or damaged.

Incorrect amount of coffee.

1.

Timer adjustment

Refer to the Adjustment section

 

 

 

in the Installation and Operation

 

 

 

Manual.

 

2.

Snubber

Refer to Service - Snubber for re-

 

 

 

placement procedures.

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TROUBLESHOOTING (cont.)

PROBLEM

PROBABLE CAUSE

REMEDY

Incorrect coffee grind dispensed.

1.

Burr adjustment

Refer to the Adjustment section

 

 

 

in the Installation and Operation

 

 

 

Manual.

Excessive chaff

1.

Dechaffer

Replace the dechaffer springs.

 

 

 

Replacement dechaffer springs are

provided in the literature package accompnting the grinder.

Grinder only dispenses from one hopper

Timer will not display or displays incorrectly.

1. Hopper selector switch (Model LPG-2E only)

1. Digital Timer

Refer to Service - Hopper selector switch for testing procedures.

(A)Unplug the grinder. Wait a few seconds and plug it in again.

(B)Refer to Service - Timer for testing procedures.

Incorrect weight of coffee dispensed

1.Grinder scale requires calibration.

2.Funnel handle touched during grinding.

Refer to GRINDER SCALE CALIBRATION procedure.

Do not touch funnel or funnel handle during grinding operation.

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SERVICE

This section provides procedures for testing and replacing various major components used in this grinder should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem.

WARNING - Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel. The grinder should be unplugged when servicing, except when electrical tests are required and the test procedure specifically states to plug-in the grinder.

Component Access

WARNING - Unplug the grinder before the removal of any panel or the replacement of any component.

All components are accessible by the removal of the lid, hopper, or front and rear access panels. Mark and retain all screws,washers and nuts for installation.

Component Locations

Some pictures showing component locations may be general to all grinders unless the component is specific to your model.

P602

CAUTION

PERSONAL INJURY

HAZARD.

KEEP FINGERS AND

FOREIGN OBJECTS

OUT OF HOPPER

OR CHUTE OPENING.

P603

14

P1306

P1307

P1308

41545 122209

SERVICE (Cont.)

BAG SENSOR SWITCH (Models G1, G2, G3) or CUP SENSOR SWITCH (MODEL G2 TRIFECTA)

P1704

FIG. 1 BAG SENSOR SWITCH

Location:

The bag sensor switch is located inside the lower front of the grinder housing behind the coffee dispensing chute.

Test Procedure:

1.Disconnect the grinder and place a coffee bag behind the dispense chute.

2.Remove the white/violet wire from the bag sensor switch.

3.Check the voltage across the white/violet wire from the bag sensor switch and the white wire, red/black wire or red wire on the relay coil with

avoltmeter. Hold the Off/On/Start switch in the “START” (lower) position and connect the grinder to the power source. The indication must be:

a.120 volts ac for two wire 120 volt models.

b.230 volts ac for two wire 230 volt models.

c.240 volts ac for two wire 240 volt models.

4.Disconnect the grinder from the power source.

If voltage is present as described, proceed to #5.

If voltage is not present as described, refer to the Wiring Diagrams and check the grinder wiring harness.

5.Check for continuity across the terminals on the bag sensor switch.

If continuity is present as described, reconnect the wires, the switch is operating properly.

If continuity is not present as described, replace the switch.

Removal and Replacement:

1.Remove the wires from the switch.

2.Remove the two #8-32 keps nuts securing the bag sensor assembly to the grinder housing.

3.Remove the two #2-56 screws, nuts and external tooth lockwashers securing the switch to the bag sensor assembly.

4.Mount the new switch to the bag sensor assembly using two #2-56 screws, nuts and external tooth lockwashers. Adjust the assembly by locating the corner of the switch housing to the top edge of the black metal mounting bracket.

5.Reattach the sensor assembly to the grinder housing and secure with two #8-32 keps nuts.

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

WHI/VIO from Off/On/Start Switch

WHI/ORA to Terminal “A” on Relay

FIG. 2 BAG SENSOR SWITCH TERMINALS P1705

15

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SERVICE (Cont.)

AC MOTOR AND GRIND CHAMBER

FIG. 3 AC MOTOR AND GRIND CHAMBERP1704

Location:

The motor is located inside the upper part of the grinder housing.

Test Procedure:

1.Remove the plug located on the right side of the housing. Press the red “Reset” button visible through the opening. Listen carefully for a “click”. This resets the motor protection circuit and may indicate that something other than coffee was inserted into the hopper for grinding.

If the grinder remains unable to start, proceed to #2. If the grinder stops operating shortly after starting, refer to removal and replacement instructions and inspect for foreign materials.

2.Disconnect the grinder from the power source and place a coffee bag behind the dispense chute.

3.Remove the electrical access panel at the rear of the motor.

4.Check the voltage across the white, red or red/ black and white/blue wires on terminals L1 & L2 with a voltmeter. Connect the grinder to the power source. When the Off/On/Start switch is momentarily placed in the “START” (lower) position and then left in the “ON” (center) position and a bag is in place behind the coffee dispense chute.

The indication must be:

a.120 volts ac for two wire 120 volt models.

b.230 volts ac for two wire 230 volt models

c.240 volts ac for two wire 240 volt models.

5.Disconnect the grinder from the power source.

If voltage is present as described replace the motor. If voltage is not present as described, reconnect the white, red or red/black and white/blue wires to the motor, refer to the Wiring Diagrams and check the grinder wiring harness.

Removal and Replacement - Motor (Refer to FIG.6):

1.Remove the plate on the rear of the motor and disconnect all wires from the motor.

2.Remove the two .250”-20 screws (1) securing grind selector dial plate and grind selector knob

(2)to the grind chamber. Remove dial plate and selector knob as an assembly.

3.Slide burr (7), auger rotor/spring assembly (3), shear plate (4) and burr rotor cup (5) off the grinder motor shaft as an assembly.

4.Remove the two .250”-20 screws (8) securing the stationary burr (9) to the grind chamber.

5.Remove bushing (10) and shaft extension (11) from the grinder motor shaft.

6.Remove the two #8 thread forming screws (12) securing the fill plate (13) to grinder housing and remove plate (13).

7.Remove the four #10-24 screws (14) securing the chute assembly (15) to the grind chamber and remove chute assembly (15).

8.Remove the four .250”-20 screws, flat washer and rubber washers securing the motor to the mounting bracket.

9.Remove motor out the rear of the grinder housing.

10.Remove the four .250”-20 cage nuts from the motor mount.

16

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SERVICE (Cont.)

AC MOTOR AND GRIND CHAMBER (cont.)

11.Clean all grinding burrs and mounting surfaces before reassembly.

12.Install the four .250”-20 cage nuts on the new motor.

13.Place the new motor with hopper collar and bushing into position on the bushings on the motor mounting bracket.

14.Using four .250”-20 screws, flat washers and rubber washers secure the motor to the mounting bracket.

15.Install stationary burr (9) to the grind chamber housing using two .250”-20 screws.

16.Install burr (7) and burr auger rotor/spring assembly (3) on to motor shaft.

17.Install motor shaft extension (11) on motor shaft.

18.Align the slot in the motor shaft extension (11) with the slot in the burr auger rotor/spring assembly

(6) and install shear plate (4).

19.Install burr rotor cup (5).

20.Install grind selector dial plate and grind selector knob assembly on the grind chamber housing and secure with two .250”-20 screws.

21.Refer to Fig. 4 and reconnect the wires.

22.Refer to ADJUSTMENTS in the Installation and Operating Manual, and reset the burrs.

WHI/BLU to

Relay N.O.(K4)

WHI to Cordset (120V)

RED/BLK to Cordset (230V)

GRN to Ground (120V)

GRN/YEL to Ground (230V)

 

P1310

FIG. 4 AC MOTOR TERMINALS

 

 

17

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SERVICE (Cont.)

AC MOTOR AND GRIND CHAMBER (cont.)

 

 

 

 

 

 

18

1

19

17

 

20

7

6

4

5

 

 

 

 

 

11

10

9

8

3

 

 

 

 

14

 

 

 

 

2

1

 

16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13

 

 

 

 

 

 

 

15

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12

 

 

 

 

 

 

 

 

FIG. 5 GRIND CHAMBER COMPONENTS

 

 

 

P1708

 

 

 

 

 

Removal and Replacement - Grind Chamber - Fig. 5:

1.Loosen the two set screws (16) securing the grind selector knob to the grind selector dial plate (18) and remove knob.

2.Remove the adjusting screw w/bearing (19). Inspect adjusting screw w/bearing for wear. Replace if excessively worn or damaged.

3.Remove the two .250”-20 screws (1) securing the grind selector dial plate (18) to the grind housing.

4.Slide burr auger rotor/spring assembly (3) off of the grinder motor shaft with burr rotor cup (5), shear plate

(4)and burr (7) as an assembly.

5.Remove burr rotor cup (5) and shear plate (4) from burr auger rotor/spring assembly (6). Inspect shear plate (4) for wear. Replace if excessively worn or damaged.

6.Remove the two .250” screws (20) securing burr (7) to burr auger rotor/spring assembly (6) and remove burr

(7).Inspect burr (7) for wear. Replace if excessively worn or damaged.

7.Remove the two .250”-20 screws (8) securing the stationary burr (9) to grind chamber housing and remove burr. Inspect for wear. Replace if excessively worn or damaged.

NOTE: Burrs are serviced in sets of two with hardware.

8.Clean all grinding burrs and mounting surfaces before reassembly.

9.Remove bushing (10) and shaft extension (11) from grinder motor shaft. Inspect for wear. Replace if excessively worn or damaged.

10.Install shaft extension (11) and bushing (10) onto the grinder motor shaft.

11.Install stationary burr (9) inside the grind chamber and secure with two .250” -20 screws (8).

12.Install burr (7) on burr auger rotor/spring assembly (6) securing with two .250”-20 screws (20).

13.Slide burr auger rotor/spring assembly and burr (3) onto the motor shaft.

14.Align the slot in the shaft extension and the slot in the burr auger rotor/spring assembly and install shear plate

(4).

15.Install burr rotor cup (5) onto the burr auger rotor/spring assembly (6).

16.Install the adjusting screw w/bearing (19) into the grind selector dial plate (18).

17.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.Install grind selector knob (17) onto the grind selector

dial plate (18).

NOTE: Refer to ADJUSTMENTS in the Installation and Operating Manual, and reset the burrs.

18

41545 122209

 

SERVICE (Cont.)

DC MOTOR AND GRIND CHAMBER - G1MD ONLY

P1706

FIG. 6 DC MOTOR AND GRIND CHAMBER

Location:

The motor is located inside the upper part of the grinder housing.

Test Procedures:

4.Check the voltage across the (+) and (-) terminals with a voltmeter. Connect the grinder to the power source. When the Off/On/Start switch is momentarily placed in the “START” (lower) position and then left in the “ON” (center) position and a bag is in place behind the coffee dispense chute. The indication must be approximately 108 volts dc.

5.Disconnect the grinder from the power source.

If voltage is present as described replace the motor. If voltage is not present as described, reconnect the white or red and white/blue wires to the motor, refer to the Wiring Diagrams and check the grinder wiring harness.

Removal and Replacement - Motor (Refer to Fig. 8)

1.Disconnect all wires from the motor.

2.Remove the two .250”-20 screws (1) securing grind selector dial plate and grind selector knob

(2)to the grind chamber. Remove dial plate and selector knob as an assembly.

3.Slide burr (7), auger rotor/spring assembly (3) and burr rotor disc (4) off the grinder motor shaft as an assembly.

4.Remove the two .250”-20 screws (8) securing the stationary burr (9) to the grind chamber.

5.Remove bushing (10) and washer (11) from the grinder motor shaft.

1.Remove the rear panel. Press the red “Reset” 6. Remove the two #8 thread forming screws (12)

button visible on the rear of the motor. Listen carefully for a “click”. This resets the motor protection circuit and may indicate that something other than coffee was inserted into the hopper for grinding.

If the grinder remains unable to start, proceed to #2. If the grinder stops operating shortly after starting, refer to removal and replacement instructions and inspect for foreign materials.

2.Disconnect the grinder from the power source and place a coffee bag behind the dispense chute.

3.Remove the black wire from the rectifier (+) terminal and the red wire from the (-) terminal.

securing the fill plate (13) to grinder housing and remove plate (13).

7.Remove the four #10-24 screws (14) securing the chute assembly (15) to the grind chamber and remove chute assembly (15).

8.Disconnect all the wires from the rectifier (23).

9.Remove the four .312”-18 screws (20), rubber washers (22) and flat washers (21) securing the motor and bracket to the grinder housing bracket.

19

41545 122209

 

SERVICE (Cont.)

DC MOTOR AND GRIND CHAMBER - G1MD ONLY (cont.)

10.Remove motor and bracket out the rear of the grinder housing.

11.Remove the two .250”-20 screws securing the motor to the front of the mounting bracket.

12.Remove the two #10-32 screws securing the motor to rear of the mounting bracket.

13 Remove motor from bracket.

14.Clean all grinding burrs and mounting surfaces before reassembly.

15Place the new motor with hopper collar into position on the motor mounting bracket.

16.Using two .250”-20 screws secure the motor to the front of the mounting bracket.

17.Using two #10-32 screws secure the motor to the rear of the mounting bracket

18.Install motor and bracket through the rear of the grinder, position on the grinder housing bracket and secure with four .312”-18 screws (20), rubber washers (22) and flat washers (21).

19.Install stationary burr (9) to the grind chamber housing using two .250”-20 screws (8).

20.Install burr (7), burr auger rotor/spring assembly

(3) and burr rotor disc (4) on to motor shaft.

21.Install grind selector dial plate and grind selector knob assembly (2) on the grind chamber housing and secure with two .250”-20 screws.

22.Refer to Fig. 7 and reconnect the wires to the motor and Fig. 37 and reconnect the wires to the rectifier.

23.Refer to ADJUSTMENTS section and reset the burrs.

Removal and Replacement - Grind Chamber - Refer to Fig. 8:

1.Loosen the two set screws (16) securing the grind selector knob to the grind selector dial plate (18) and remove knob.

2.Remove the adjusting screw w/bearing (19). Inspect adjusting screw w/bearing for wear. Replace if excessively worn or damaged.

BLU to BLU from Rectifier

BLU to WHI/BLU from

Relay (3)

RED to Rectifier (-)

BLK to Rectifier (+)

P1710

FIG. 7 DC MOTOR TERMINALS

3.Remove the two .250”-20 screws (1) securing the grind selector dial plate (18) to the grind housing and remove plate.

4.Slide burr auger rotor/spring assembly (3) off of the grinder motor shaft with burr (7) as an assembly.

5.Remove the two .250”-20 screws (5) securing burr (7) to burr auger rotor/spring assembly (6), remove burr (7) and burr rotor disc (4). Inspect burr (7) for wear. Replace if excessively worn or damaged.

6.Remove the two .250”-20 screws (8) securing the stationary burr (9) to grind chamber housing and remove burr. Inspect for wear. Replace if excessively worn or damaged.

NOTE: Burrs are serviced in sets of two with hardware.

7.Remove bushing (10) and washer (11) from grinder motor shaft. Inspect for wear. Replace if excessively worn or damaged.

8.Clean all grinding burrs and mounting surfaces before reassembly.

9.Install washer (11) and bushing (10) onto the grinder motor shaft.

10.Install stationary burr (9) inside the grind chamber and secure with two .250” -20 screws (8).

20

41545 122209

 

SERVICE (Cont.)

DC MOTOR AND GRIND CHAMBER - G1MD ONLY (cont.)

11.Install burr (7) on burr auger rotor/spring assembly (6) securing with two .250”-20 screws (5).

12.Slide burr auger rotor/spring assembly and burr

(3) onto the motor shaft.

13.Install burr rotor disc (4).

14.Install the adjusting screw w/bearing (19) into the grind selector dial plate (18).

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

(1).

16.Install grind selector knob (17) onto the grind selector dial plate (18).

NOTE: Refer to ADJUSTMENTS and reset the burrs.

 

 

 

 

 

 

 

18

1

19

17

 

5

7

6

 

 

 

 

 

 

 

23

 

9

8

11

10

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22

 

 

 

 

 

 

 

 

 

 

21

 

 

 

 

 

4

2

1

 

 

20

14

 

 

 

 

 

 

 

 

16

 

 

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

13

 

 

 

 

 

 

 

 

 

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FIG. 8 MOTOR AND GRIND CHAMBER REMOVAL

 

 

P1711

 

 

 

 

21

41545 122209

 

SERVICE (Cont.)

MOTOR (Models LPG & FPG)

FIG. 9 MOTOR

P1022

 

Location:

The motor is located inside the hopper assembly.

Test Procedures:

1.Disconnect grinder from the power supply.

2.On Model LPG-2E, disconnect the black wire and the white wire to the motor from the main wiring harness, the red wire to the circuit breaker and the red wire to the Off/On/Start switch. On Model LPG disconnect the motor wiring harness from the main wiring harness.

3.Connect the leads of an ohm meter to the red wires from the motor.

If continuity is present the overload is good.

If continuity is not present the overload will not reset, replace the motor.

4.Set an ohm meter to read at least 20 ohms. Connect the leads from the ohm meter to the black wire and the white from the motor. The ohm reading should be approximately 18 ohms. Using the bean agitator slowly rotate the motor shaft in approximately 1/8

turn steps through one full rotation. If ohm readings are consistent motor windings are good. If readings vary more than ±1 ohm, replace motor.

NOTE: Clean all grind burrs and mounting surfaces before reassembly.

Removal and Replacement:

1.On Model LPG-2E, disconnect the black wire and the white wire to the motor from the main wiring harness, the red wire to the circuit breaker and the red wire to the Off/On/Start switch. On Model LPG disconnect the motor wiring harness from the main wiring harness.

2.On Model LPG-2E, disconnect the red wire from the left and right solenoid, the orange wire from the left solenoid and the violet wire from the right solenoid.

 

2

 

3

 

1

FIG. 10 MOTOR REMOVAL

P1049

 

3.Refer to Fig 10. Remove the three #10-32 x .25” screws (1) securing the motor to the motor support bracket.

4.Remove the motor, solenoid and solenoid components (2) from the hopper housing (3) as an assembly.

NOTE: Steps 5 thru 12 apply only to Model LPG-2E.

5.Refer to Fig.11. Remove the three #8-32 Keps nuts.

6.Lift the retaining ring w/hopper gasket (1) over the motor and burr housing assembly (6). Set aside for reassembly.

7.Lift slide plate, solenoid plunger and spring (2) off of the dowel pin in the mounting ring and slide solenoid plunger and spring (2) out of solenoid coil. Set aside for reassembly. Repeat for opposite side.

22

41545 122209

 

SERVICE (Cont.)

MOTOR (Models LPG & FPG)

8.Remove spacer plate (3) and set aside for reassembly.

9.Lift solenoid bracket and solenoids (4) over the motor and burr housing assembly (6) and set aside for reassembly.

10.Remove the #8-32 setscrew (5) and set aside for reassembly.

11.Lay motor on it’s side.

NOTE: Refer to Fig. 14 for the disassembly and assembly of the burrs and rotor.

12.Remove the two #10-32 fillister head screw securing burr housing cap (10) to the burr housing.

13.Remove cap, burr adjusting screw, decaffing plate and decaffer support (10) as an assembly. Set aside for reassembly.

14.Remove load disc (11) and set aside for reassembly.

15.Slide rotor (12), lower burr (13) and spring (14) as an assembly off the motor shaft, set aside for reassembly.

16.Remove burr housing divider (8) and set aside for reassembly.

NOTE: Inspect rotor. If rotor needs to be replaced, remove the two #10-32 binding head screws securing lower burr (13) to the rotor and remove burr. Install lower burr (13) on new rotor (12) using two #10-32 binding head screws.

17.Slide spring retaining bushing (15) off the motor shaft and set aside for reassembly.

18.Remove the two #10-32 binding head screws securing the upper burr (16) to the motor and housing assembly (17).

19.Remove the upper burr (16) and set aside for reassembly.

NOTE: If burrs need to be replaced, they must be replaced in matched pairs.

 

1

 

2

 

3

2

4

 

 

5

6

 

 

P1050

 

FIG. 11 SOLENOID AND GATES

1.Retaining Ring W/Hopper Gasket

2.Slide Plate, Solenoid Plunger and Spring

3.Spacer Plate

4.Mounting Ring, Solenoid and Solenoid Mounting Plate

5.Setscrew, #8-32

6.Motor and Burr Housing

23

41545 122209

 

SERVICE (Cont.)

MOTOR (Models LPG & FPG)

 

13

 

 

 

 

 

 

 

 

 

MODEL LPG ONLY

 

 

 

 

 

 

10

11

12

13

14

15

16

17

18

 

 

 

 

FIG. 12 ROTOR/AUGER, BURRS AND MOTOR COVER

P1051

 

 

 

 

20.Remove the two #8-32 flat head screws securing the motor cover (18) to the motor and housing assembly (17) and remove the cover. Set aside for reassembly.

21.Discard old motor and housing assembly.

22.Place new motor on it’s side and install motor cover

(18)using two #8-32 flat head screws.

23.Install upper burr (16) to the new motor and housing assembly (17) using two #10-32 binding head screws.

24.Install spring retaining bushing (15) on motor shaft.

25.Refer to Fig. 11. Install burr housing divider (8) in slot in the burr housing and secure with #8-32 cup point setscrew (7), for Model LPG-2E only.

26.RefertoFig. 12.Install rotor (12),lowerburr (13) and spring (14) as an assembly on the motor shaft.

27.Install load disc (11) flat side towards rotor.

28.Install burr housing cap (10), adjusting screw, dechaffing spring plate and dechaffer support as an assembly to the new motor and housing assembly

(17)using two #10-32 fillister head screws.

29.Set motor upright with burr housing at the bottom.

NOTE: Steps 30 thru 33 apply only to Model LPG-2E.

30.Install solenoids and solenoid bracket (4) as an assembly on the new motor.

31.Install spacer plate (3) making sure the hole in the spacer plate aligns with the hole in the mounting ring.

32.Install solenoid plunger with spring and slide plate

(2) as an assembly into the solenoid coil. Place slide plate on the dowel in the mounting ring. Repeat for the opposite side.

33.Install retaining ring w/hopper gasket (1) using three #8-32 pan head screws and three #8-32 keps nuts.

34.Refer to Fig.10. Install motor, solenoids and solenoid components (2) in the hopper housing (3) using three #10-32 truss head screws (1).

35.Reconnect wires for motor and solenoids. Refer to wiring schematic.

24

41545 122209

 

SERVICE (Cont.)

DECHAFFER (Models LPG & FPG)

FIG. 13 DECHAFFER

P1062

 

Location:

 

The dechaffer spring plates are located in the burr housing cap.

Removal and Replacement: Refer to Fig. 14

1.Remove coffee beans from hopper(s).

2.Lay grinder on it’s back.

3.Remove the #4-40 truss head screw securing dechaffer support (1) to the burr housing cap.

4.Remove dechaffer support (1).

5.Remove dechaffer spring plate (2) from burr hosing cap.

6.For models with extra fine dechaffer, remove dechaffer support (3).

7Place new dechaffer spring plate (2) in the slot in the burr housing cap.

8.Place dechaffer support (1) over dechaffer spring plate (2), support (3) and secure with a #4-40 truss head screw.

2

 

 

 

 

1

3

2

1

OPTONAL EXTRA

FINE DECHAFFER

 

 

P1063

FIG. 14 DECHAFFER REMOVAL/REPLACEMENT

25

41545 122209

 

SERVICE (Cont.)

MOTOR (Models G9, G9-2, MHG)

 

FIG. 15 MOTOR

P1309

 

Location:

The motor is located in the upper wrapper under the hopper.

Test Procedure:

1.Remove the hole plug located on the right side of the housing. Press the red “Reset” button visible through the opening. Listen carefully for a “click”. This resets the motor protection circuit and may indicate that something other than coffee was inserted into the hopper for grinding.

If the grinder remains unable to start, proceed to step 2. If the grinder stops operating shortly after starting, refer to the removal and replacement steps to gain access-to the grind chamber. Remove any foreign materials that may be found.

2.Disconnect the grinder from the power supply.

3.Remove the electrical access panel at the rear of the motor.

4.Check the voltage across terminals L1 & L2 of the motor with a voltmeter when the Off/On/Start switch is placed in the “START” (right) position and released. Connect the grinder to the power supply. The indication must be:

(a)120 volts ac for two wire 120 volt models.

(b)240 volts ac for two wire 240 volt models.

5.Disconnect the grinder from the power supply.

If voltage is present as described and the grinder remains unable to start, replace the motor.

If voltage is not present as described, refer to the Wiring Diagrams, and check the grinder wiring harness.

Removal and Replacement - MOTOR

1.Remove all wires from the Off/On/Start switch, motor, and motor mounting plate.

2.The entire wiring harness must be fed into the bottom of the grinder housing through the hole in the motor mounting plate.

3.Remove both 6-32 screws beneath the upper front inspection panel.

4.Remove the six 10-32, hex head screws on top of the motor mounting plate.

5.Slowly slide the assembly out the rear of the grinder housing. The mounting plate will have to be raised to gain clearance for the motor hardware and wiring harness bushing.

6.Remove the four 5/16”-18 bolts and nuts to separate the motor from the mounting plate.

7.Mount the new motor and tighten the four bolts and nuts. They should be tightened approximately one full turn past snug.

8.Slide the motor mounting plate into the rear of the grinder housing.

9.Feed the wiring harness into the top of the housing through the hole in the motor plate.

10.Reinstall the six 10-32 hex head screws through the motor plate and the two 6-32 screws through the housing.

11.Reattach the green wire to the 10-32 stud on the motor mounting plate.

12.Refer to the Off/On/Start switch section when reconnecting the switch wires.

13.Refer to the illustration below when reconnecting the motor wires.

 

WHI/ BLU to Snubber

 

 

WHI/BLU to Relay

 

 

WHI/BLK to Cordset

 

 

(120V models)

 

 

RED/BLK to Cordset

 

 

(230V models)

 

 

WHI/BLK to Snubber

 

 

GRN to Chasis Ground

 

 

YEL to Snubber

 

 

FRANKLIN MOTOR

 

 

WHI/BLK to Snubber

 

YEL to Snubber

 

 

WHI/ BLU to Snubber

 

WHI/BLK to Cordset

 

WHI/BLU to Relay

 

 

GRN to Chasis Ground

 

 

MARATHON MOTOR

P621

 

FIG. 16 MOTOR WIRING

 

 

26

41545 122209

 

 

SERVICE (Cont.)

MOTOR (Models G9, G9-2, MHG)

 

 

 

 

 

9

 

 

 

 

 

8

 

 

 

 

 

7

6

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

4

 

 

 

 

 

3

 

 

 

 

 

2

 

 

 

 

 

1

 

 

 

 

 

 

 

 

0

15 14

 

 

 

1

 

13

 

 

2

 

 

12

 

3

 

 

 

11

 

4

 

 

 

10

 

5

6

7

8

9

 

 

 

FIG. 17 MOTOR AND GRIND CHAMBER

P1311

 

 

 

 

 

1.Indicator Adjustment Cap & Decal

2.Adjusting Screw

3.Burr Housing Cap

4.Rotor Cup

5.Shear Plate

Removal and Replacement - GRIND CHAMBER

1.Refer to the illustration above and remove the two 1/4”-20, hex head screws holding the burr housing cap(3) to the burr housing; carefully remove the burr housing cap. Inspect the adjusting screw(2) to see if the thrust plug is worn.

Replace if excessively worn or damaged.

2.Carefully remove rotor cup(4), shear plate(5), and burr rotor(6) from the grinder. Inspect the shear plate and burr(8) for wear.

Replace if excessively worn or damaged.

3.Remove and inspect stationary burr(9) for wear.

Replace if excessively worn or damaged.

NOTE: Burrs must be replaced as a set.

6.Rotor

7.Spring

8.Burr (Rotating)

9.Burr (Stationary)

4.Inspect the grind chamber and remove any foreign materials. The burrs will not properly seat in the chamber if any material or coffee particles remain.

5.Reinstall the stationary burr, spring, burr rotor, shear plate, rotor cup, and burr housing cap to the burr housing.

6.Refer to ADJUSTMENTS in the Installation and Operating Manual to vary the grind dispensed.

27

41545 122209

 

SERVICE (Cont.)

SNUBBER (Models G9, G9-2, MHG)

 

 

FINE

CO

ARSE

 

 

TE

 

 

HM

 

 

OP

 

 

RT

 

 

OY

 

 

U

 

 

GH

 

 

HO

 

H

LYPPER BEFO

CLEAN GRIND C

 

 

 

P611

FIG. 18 SNUBBER

Location:

The snubber is located at the back of the motor attached to the right side of the wiring harness.

Removal and Replacement:

1.Remove snubber wires from the motor terminals.

2.Cut the ties holding snubber to the wiring harness.

3.Refer to the following illustration when reconnecting the wires.

4.Fasten snubber to the wiring harness using new ties.

WHI/ BLU to Snubber

WHI/BLU to Relay

WHI/BLK to Cordset

(120V models)

RED/BLK to Cordset

(230V models)

WHI/BLK to Snubber

GRN to Chasis Ground

YEL to Snubber

FRANKLIN MOTOR

WHI/BLK to Snubber

YEL to Snubber

WHI/ BLU to Snubber

WHI/BLK to Cordset

WHI/BLU to Relay

GRN to Chasis Ground

MARATHON MOTOR

P621

FIG. 19 SNUBBER

28

41545 122209

 

SERVICE (Cont.)

Grinder Scale (Model G9WD only)

CALIBRATION

1.Place empty funnel into funnel rails.

2.Press and hold the right hidden (copyright) button until the “MACHINE TYPE” menu appears. (See level 2 programming)

3.Press the middle button under the screen until the “CALIBRATE SCALES?” menu appears.

4.Press the right button under “YES” in the “CALIBRATE SCALES?” screen.

5.Press the middle button under “TARE”.

6.When the “PLACE 8oz” screen appears, remove the funnel, and place a calibrated 8oz weight in the funnel. Replace the funnel in the funnel rails.

7.Press the middle button under “DONE”. The grinder will go through a calibration, and then return to the main screen when calibration is complete.

8.Remove the weight from the funnel. The grinder is now ready calibrated and ready for normal operation.

LEVEL 2 FUNCTIONS:

Press the hidden

(copyright) button for 3 seconds in “ENTER PASSWORD” menu.

MACHINE TYPE

WEIGHT TIMED

CALIBRATE SCALE ? NO YES

MODIFY MAXBIT NO SPREAD? YES

SHUToff Bits ## (-) DONE (+)

MaxBits read # (-) DONE (+)

Finished, returns to main screen

CALIBRATION OZ (-) 8.00 (+)

CALIBRATE SCALES EXIT TARE

PLEASE WAIT TARE

PLACE 8.00 oz

EXIT DONE

PLEASE WAIT CAL

29

41545 072710

 

SERVICE (Cont.)

Capacitor (Model LPG only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

into

rails

.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

nel

 

n.

 

 

 

 

 

 

 

 

 

 

 

 

slide

fun

T"

positio

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

l and

"STAR

 

.

 

 

 

 

 

 

 

 

 

 

fu

nne

 

to

shed

 

 

 

 

 

 

 

 

 

 

 

 

tch

 

n fini

 

 

 

 

 

 

 

filter

into

th

e swi

 

whe

 

 

 

 

 

 

 

 

lace

 

push

 

lly st

op

 

 

 

 

 

 

 

 

 

P

 

arily

tica

 

 

 

 

 

 

 

 

 

1.

M

om

ent

will

auto

ma

 

 

 

 

 

 

 

 

 

 

 

 

2.

 

r

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.

Grinde

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FIG. 20 CAPACITOR

P1745

 

Location:

The capacitor is located inside the front panel of the hopper housing next to the Off/On/Start switch.

Test Procedure:

1.Disconnect grinder from the power source.

2.Visually inspect the capacitor for leakage. If leakage is visible, replace the capacitor.

3.Connect the grinder to the power source, if the motor does not run, disconnect the capacitor wiring harness from the main wiring harness. If the motor now runs, replace the capacitor.

Removal and Replacement:

1.Disconnect the capacitor wiring harness from the main wiring harness.

2.Remove the #8-32 nut attaching the capacitor and mounting bracket to the hopper housing and remove the bracket, shield, capacitor and capacitor wiring harness as an assembly.

3.Disconnect the wiring harness from the capacitor and attach it to a new capacitor making sure the black wire attaches to the positive (+) pole, FIG. 21.

4.Wrap the shield around the capacitor and place into the mounting bracket. Slide the lower tab of the mounting bracket between the wrapper and base and secure in place over the mounting stud with the #8-32 nut.

5.Reconnect the wiring harness to the main wiring harness.

+

BLK

WHI/BRN

P1747

FIG. 21 CAPACITOR TERMINALS

30

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SERVICE (Cont.)

Circuit Breaker (Models LPG, LPG-2E, FPG, FPG-2 DBC)

FIG. 22 CIRCUIT BREAKER

P1036

 

Location:

The circuit breaker is located on the rear of the grinder next to the power cord strain relief bushing. The circuit breaker is not available on Model LPG equipped with capacitor.

Test Procedure:

1.Disconnect grinder from the power source.

2.Remove the wires from the circuit breaker.

3.Check for continuity between the terminals. Continuity must be present between the terminals.

If continuity is present as described the circuit breaker is functioning properly.

If continuity is not present as described, press reset button and repeat step #3, if continuity is not present as described, replace the circuit breaker.

Removal and Replacement:

1.Remove the wires from the circuit breaker.

2.Remove the face nut securing circuit breaker to the motor support.

3.Remove circuit breaker.

4.Install new circuit breaker in motor support and secure with face nut.

5.Reconnect the wires.

6.Refer to FIG. 23 when reconnecting the wires.

RED from Motor-LPG-2E

BLK from Start Switch-LPG

BLK from Power Cord

FIG. 23 CIRCUIT BREAKER TERMINALS P1037

31

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SERVICE (Cont.)

Hopper Selector Switch (Model LPG-2E only)

 

 

 

 

P1029

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FIG. 24 HOPPER SELECTOR SWITCH

 

 

 

 

 

 

 

 

 

Location:

The Hopper Selector Switch is located in the lower left front of the hopper housing.

Test Procedure:

1.Disconnect grinder from the power supply.

2.Remove all wires from the switch terminals.

3.Check that the switch is installed properly, FIG. 25.

4.Place the selector switch in the left position.

5.Check for continuity across the terminals on the rear of the switch.

If continuity is present as described proceed to #6. If continuity is not present as described, replace the switch.

6.Place the selector switch in the right position.

7.Check for continuity across the terminals on the rear of the switch. Continuity should not be present across terminals in the right position.

If continuity is not present as described, reconnect the wires, the switch is operating properly.

If continuity is present replace the switch.

Removal and Replacement:

1.Remove all wires from the switch terminals.

2.Compress the clips inside the front of the housing and gently push the switch through the opening.

3.Push the new switch into the opening and spread the clips to retain the switch in the housing.

4.Refer to Fig. 25 when reconnecting the wires.

WHI to OFF/ON/START Switch

BLU to Timer P1-4 (BLU)

P1038

FIG. 25 HOPPER SELECTOR SWITCH TERMINALS (Viewed from rear)

32

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SERVICE (Cont.)

Hopper Selector Switch (Model G9-2 only)

P594

FIG. 26 HOPPER SELECTOR SWITCH

Location:

The hopper selector switch is located in the center on the front of the hopper housing.

Test Procedure:

1.Disconnect the grinder from the power source.

2.Remove all wires from the switch terminals.

3.Place the selector switch in the left position.

4Check for continuity across the center and right terminals on the rear of the switch.

5.Continuity must not be present across the center and left terminals on the rear of the switch.

6.Check the bottom row, then the top row of terminals.

If continuity is present as described proceed to #7. If Continuity is not present as described replace the switch.

7.Place the selector switch in the right position.

8.Check for continuity across the center and left terminals on the rear of the switch.

9.Continuity must not be present across the center and right terminals on the rear of the switch.

10.Check the bottom row, then the top row.

If continuity is present as described, reconnect the wires, the switch is operating properly.

If continuity is not present as described, replace the switch.

Removal and Replacement:

1.Remove all wires from the switch terminals.

2.Compress the clips inside the front of the housing and gently push the switch through the opening.

3.Push the new switch into the opening and spread the clips to retain the switch in the housing.

4.Refer to Fig. below when reconnecting the wires.

ORA to Timer P1-6

BLU to Timer P1-8

YEL to Timer P1-1

P787

FIG. 27 HOPPER SELECTOR SWITCH TERMINALS

33

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SERVICE (Cont.)

Off/On/Start Switch (Models LPG, LPG-2E, FPG, G-1,G-2,G-3, G9, G9-2, G2 trifecta)

FIG 28 OFF/ON/START SWITCH

P594

 

Location:

The Off/On/Start switch is located to the left side on the front of the housing above the upper front inspection panel.

Test Procedure:

1.Unplug the grinder.

2.Remove the black wire from the switch.

3.Check for continuity across the black wire from the Off/On/Start switch and the left blade of the cordset connector (see illustration below).

CORDSET CONNECTOR

Looking Strait-on

Black

 

 

 

 

 

White

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ground

If continuity is present as described, proceed to #4. If continuity is not present as described, refer to the Wiring Diagrams and check the grinder wiring harness.

4.Remove the remaining wires from the switch.

5.Check for continuity across the left terminals when the switch is placed in both the “ON” (center) and “START” (lower) positions. Continuity must not be present in the “OFF” position.

If continuity is present as described, proceed to #6. If continuity is not present as described, replace the switch.

6.Check for continuity across the right terminals when the switch is placed in the “START” (lower) position only. Continuity must not be present in the “OFF” position.

If continuity is present as described, the Off/On/Start switch is operating properly.

If continuity is not present as described, replace the switch.

Removal and Replacement:

1.Remove all wires from the switch terminals.

2.Compress the clips inside the front wrapper and gently push the switch through the opening.

3.Push the new switch into the opening and spread the clips to retain the switch in the hood.

4.Refer to the following illustration when reconnecting the wires.

VIO to timer P1-2

BLK to Cordset

BLK to timer P4-1

WHI/RED timer to P4-6

BLU to SW2

PNK to Intf conn. 2

Grinders with Digital Timer

VIO to timer P1-2

BLK to Cordset

WHI/RED timer to P4-6

BLK to timer P4-1

BLU to SW2

PNK to Intf conn. 2

Grinders with Analog Timer

P606

FIG 29 OFF/ON/START SWITCH TERMINALS

34

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SERVICE (Cont.)

Urn/Carafe Switch (Models G9, G9-2)

URN

ON

O

S

T

F

A

F

R

 

T

CARAFE

FIG 30 URN/CARAFE SWITCH

P1300

 

Location:

The Urn/Carafe switch is located to the left side on the front of the housing above the upper inspection panel.

Test Procedure:

1.Disconnect the grinder from the power supply.

2.Remove the tan, yellow and green wires from the switch.

3.Place the switch in the “CARAFE” position; check for continuity across the pink and the tan wire terminals, also across the orange and the yellow wire terminals.

If continuity is present as described in both checks, proceed to step 4.

If continuity is not present as described in one or both of the checks, replace the switch.

4.Place the switch in the “URN” position; check for continuity across the orange and green wire terminals.

If continuity is present as described, the switch is operating properly.

If continuity is not present as described, replace the switch.

Removal and Replacement:

1.Remove all the wires from the switch terminals.

2.Compress the clips inside the housing and gently push the switch through the opening.

3.Push the new switch into the opening and spead the clips to hold the switch in the housing.

4.Refer to the illustration below when reconnecting the wires.

TAN

YEL

PNK

ORA

 

GRN

P1318

P1318

FIG 31 URN/CARAFE SWITCH TERMINALS

35

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SERVICE (Cont.)

Batch Selector Switch (Model FPG)

P2947

FIG 32 BATCH SELECTOR SWITCH

Location:

The batch selector switch is located on the left front of the hopper housing.

Test Procedure:

1.Disconnect the grinder from the power source.

2.Open hopper lid and loosen four screws inside the hopper and remove hopper.

3.The ORN wire is connected to the common terminal "a" on the rear of the switch.

4.The TAN wire for the SMALL selection is connected to terminal 1, the GRY wire for the MEDIUM selection is connected to terminal 2, the PNK wire for the LARGE selection is connected to terminal 3.

5.Remove all wires from the switch terminals.

6.Set the switch in the SMALL position. Check for continuity between terminal "a" and terminal 1.

7.Set the switch in the MEDIUM position. Check for continuity between terminal "a" and terminal 2.

8.Set the switch in the LARGE position. Check for continuity between terminal "a" and terminal 3.

If continuity is present at all positions, the switch is operating properly.

If continuity is not present at any position, replace the switch.

9. Refer to the Fig. 33 when reconnecting wires.

Removal and Replacement:

1.Disconnect the grinder from the power source.

2.Remove the four 8-32 screws attaching the rear access panel and move aside.

3.Remove all wires from the batch selector switch terminals.

4.Loosen the setscrew on the switch knob and remove the knob.

5.Remove the nut and lockwasher attaching the switch to the hopper housing.

6.Remove the 6-32 screw attaching the switch to the hopper housing.

7.Remove and discard the old switch.

8.Refer to Fig 33 when reconnecting wires.

ORN to TIMER

TAN to POTENTIOMETER

 

GRY to POTENTIOMETER

 

PNK to POTENTIOMETER

P787

FIG 33 BATCH SELECTOR SWITCH TERMINALS

36

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SERVICE (Cont.)

Potentiometer (Model FPG)

SMALL

MEDIUM

LARGE

 

 

P2946

FIG 34 POTENTIOMETERS

Location:

The potentiometer switches are located on the top rear of the hopper housing.

Test Procedure:

1.Disconnect the grinder from the power source.

2.Open hopper lid and loosen four screws inside the hopper and remove hopper.

3.Disconnect the BRN wire from the control board.

4.Disconnect the PNK, GRY, and TAN wires from the front selector switch.

5.Connect an ohmmeter to the BRN wire. Connect the other lead from the meter to the TAN wire. Turn the knob for the SMALL potentiometer all the way counterclockwise. The meter should read <3K ohm. Turn the knob all the way clockwise, the meter should read between 94K and 116K ohms.

6.Connect an ohmmeter to the GRY wire. Connect the other lead from the meter to the TAN wire. Turn the knob for the MEDIUM potentiometer all the way counterclockwise. The meter should read <3K ohm. Turn the knob all the way clockwise, the meter should read between 94K and 116K ohms.

7.Connect an ohmmeter to the TAN wire. Connect the other lead from the meter to the TAN wire. Turn the knob for the LARGE potentiometer all the way counterclockwise. The meter should read between 13.5K and 19.5K ohms. Turn the knob all the way clockwise, the meter should read between 108K and 132K ohms.

If continuity is present at all positions, the potentiometer switches are operating properly.

If continuity is not present at any position, replace the potentiometer switches.

8. Refer to Fig 35 when reconnecting wires.

Removal and Replacement:

1.Disconnect the grinder from the power source.

2.Remove the four 8-32 screws attaching the rear access panel and move aside.

3.Disconnect three wires to the batch selector switch and the one wire to the timer.

4.Loosen the setscrews on the switch knobs and remove the knobs.

5.Remove the three nuts and lockwashers attaching the switches to the rear access panel.

6.Inspect and replace the adhesive backed sponge washers on the rear access panel if necessary.

7.Install the new potentiometer switches and tighten the lockwashers and nuts.

8.Replace the knobs and tighten the setscrews. 9.Refer to Fig. 35 when reconnecting wires.

BRN to BRN WIRE at TIMER

PNK to BATCH SELECTOR SWITCH

GRY to BATCH SELECTOR SWITCH

TAN to BATCH SELECTOR SWITCH

FIG 35 POTENTIOMETER TERMINALS

37

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SERVICE (Cont.)

 

 

 

 

Rectifier (Models G1 MD, FPG-2 DBC)

 

 

 

 

 

Removal and Replacement:

 

 

1.

Disconnect the wires from the rectifier.

 

 

2. Remove the #10-32 screw securing the rectifier

 

 

to the motor mounting bracket.

 

 

3. Remove the rectifier and discard.

 

 

4.

Install new rectifier on the rear of the motor mount-

 

 

ing bracket and secure with a #10-32 screw.

 

5.

Refer to Fig. 37 and reconnect the wires.

 

 

 

BLK from Motor (+)

 

 

 

 

BLU to BLU from Motor (AC)

 

 

 

 

WHI from Main Harness (AC)

 

 

 

RED from Motor (-)

 

 

 

 

A

 

 

 

+

C

 

 

 

 

 

 

 

 

A

 

 

 

 

C

 

FIG. 36 RECTIFIER

P1706

FIG. 37 RECTIFIER TERMINALS

P1381

 

 

 

Location:

 

 

 

 

The rectifier is located inside the grinder housing

 

 

 

mounted on the rear of the motor mounting bracket

 

 

 

for models G1 MD and on the component mounting

 

 

 

bracket for model FPG-2 DBC.

 

 

 

 

Test Procedures:

1.Disconnect the grinder from the power source.

2.Remove the red wire and the black wire from the rectifier.

3.Check the voltage across the (+) and (-) terminals on the rectifier with a voltmeter. Connect the grinder to the power source and start the grinder motor. The indication must be approximately 108 volts dc.

4.Disconnect the grinder from the power source.

If voltage is present as described, the rectifier is operating properly.

If voltage is not present as described, refer to the grinder wiring diagram and check the grinder wiring harness.

38

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SERVICE (Cont.)

Relay (Early Model G-9)

 

MINUTES-MATICVAC

 

 

-O

120

 

BUNN -

 

 

P/N

2620

 

 

Single set timer shown

 

 

 

Multi set timer (Urn/Carafe) similar

P1312

 

 

 

FIG 38 RELAY

 

Location:

The relay is located on the timer bracket in the grinder base. The bracket can be removed by loosening the two 8-32 screws beneath the timer dial.

Test Procedure:

1.Disconnect the grinder from the power supply.

2.Check the voltage across the white/red and white/ green wires of the relay coil with a voltmeter when the Off/On/Start switch is placed in the “START” (right) position and released. Connect grinder to the power supply. The indication must be:

(a)120 volts ac for two wire 120 volt models

(b)240 volts ac for two wire 240 volt models for the approximate setting on the timer.

3.Disconnect the grinder from the power supply.

If voltage is present as described, reconnect the white/red and white/green wires to the relay coil, and proceed to step 4.

If voltage is not present as described, refer to the Wiring Diagrams and check the grinder wiring harness.

4.Remove the white/red and white/blue wires from the relay contacts.

5.Check for continuity across the relay contacts when the Off/On/Start switch is placed in the “START” (right) position and released. Connect grinder to the power supply. Continuity must be present for the approximate setting on the timer.

6.Disconnect the grinder from the power supply.

If continuity is present as described, reconnect the white/red and white/blue wires, the relay is operating properly.

If continuity is not present as described, replace the relay.

Removal and Replacement

1.Remove all wires from the relay terminals.

2.Remove the 6-32 screw fastening the relay to the timer bracket.

3.Mount the new relay to the timer bracket and tighten the screw.

4.Refer to the illustration below when reconnecting the wires.

WHI/BLU to Motor L1

WHI/GRN to Timer L4

WHI/RED to Timer TL1

P610

FIG 39 RELAY TERMINALS

39

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FIG.40 RELAY

SERVICE (Cont.)

Relay (Models G1, G2, G3, G2 trifecta)

P1704

Location:

The relay is located on the grinder base inside the lower housing.

Test Procedure:

1.Disconnect the grinder from the power source and place a coffee bag behind the dispense chute.

2.Check the voltage across the white/orange and white or red/black wires on terminals A & B of the relay with a voltmeter. Hold the Off/On/Start switch in the “START” (lower) position and connect the grinder to the power source. The indication must be:

a.120 volts ac for two wire 120 volt models.

b.230 volts ac for two wire 230 volt models.

c.240 volts ac for two wire 240 volt models

3.Disconnect the grinder from the power source.

If voltage is present as described, proceed to #4.

If voltage is not present as described, refer to the Wiring Diagrams and check the grinder wiring harness.

4.Remove the white/red wires from relay contacts 7 & 9.

5.Check the voltage across the white wire or red/ black on terminal B and either white/red wire with

avoltmeter. Place the Off/On/Start in either the “ON” (center) position or “START” (lower) position. Connect the grinder to the power source. The indication must be:

a.120 volts ac for two wire 120 volt models.

b.230 volts ac for two wire 230 volt 50 Hz models.

c.240 volts ac for two wire 240 volt 60 Hz models.

6.Disconnect the grinder from the power source.

7.Check the voltage across terminal B and the remaining white/red wire with a voltmeter. Place the Off/On/Start switch in either the “ON” (center) position or “START (lower) position. Connect the grinder to the power source. The indication must be:

a.120 volts ac for two wire 120 volt models.

b.230 volts ac for two wire 230 volt 50 Hz models.

c.240 volts ac for two wire 240 volt 60 Hz models.

8.Disconnect the grinder from the power source.

If voltage is present as described, proceed to #9.

If voltage is not present as described, refer to the Wiring Diagrams and check the grinder wiring harness.

9.Remove the white/violet wire from terminal 6 and white/blue wire from terminal 4.

10.Check for continuity across terminals 7 & 4. Connect the grinder to the power source. Continuitymust be present when the Off/On/Start switch is momentarily placed in the “START” (lower) position and a bag is in place behind the coffee dispense chute.

11.Check for continuity across terminals 9 & 6. Connect the grinder to the power source. Continuity must be present when the Off/On/Start switch is momentarily placed in the “START” (lower) position and a bag is in place behind the coffee dispense chute.

12.Disconnect the grinder from the power source.

If continuity is present as described, reconnect the wires, the relay is operating properly.

If continuity is not present as described, replace the relay.

40

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SERVICE (Cont.)

RELAY (cont.)

Removal and Replacement (120 Volt and 240V 60 Hz

Models):

1.Remove the wires from the relay terminals.

2.Remove the two #6-32 screws securing the relay bracket w/relay to the grinder base and remove bracket and relay as an assembly.

3.Remove the #6-32 screw securing the relay to the bracket and remove relay and discard.

4.Install new relay to the mounting bracket using one #6-32 screw,

5.Mount the new relay w/bracket to the grinder base using two #6-32 screws.

6.Refer Fig. 41 when reconnecting the wires.

Removal and Replacement (230 volt 50 Hz Models):

1.Remove the wires from the relay terminals.

2.Remove the two #6-32 screws securing the relay to the grinder base.

3.Remove relay and discard.

4.Install new relay to the grinder base using two #6-32 screw.

5.Refer Fig. 41 when reconnecting the wires.

WHI/VIO from

Switch to Relay

K-6

WHI/BLU from Motor to Relay K-4

WHI/RED from Switch to Relay K-7 & K-9

WHI to Main

Harness 120V (B)

RED/BLK to Main

Harness 240V (B)

WHI/ORN from Bag Sensor Switch (A)

120V AND 240 VOLT AC MODELS

WHI/VIO from

 

WHI to Main

Switch to Relay

Harness 120V (B)

K-6

 

RED/BLK to Main

 

 

Harness 240V (B)

WHI/BLU from

 

 

Motor to Relay

 

 

K-4

 

WHI/ORN from Bag Sensor

WHI/RED from

 

 

Switch (A)

Switch to Relay

 

 

 

K-7 & K-9

120 VOLT DC MODELS

 

WHI/VIO from

 

RED from Main

Switch to Relay

 

Harness (B)

K-6

 

 

WHI/BLU from

 

 

Motor to Relay

 

 

K-4

 

 

WHI/RED from

 

 

Switch to Relay

 

WHI/ORN from Bag Sensor

K-7 & K-9

 

 

Switch (A)

 

 

230 VOLT AC 50 Hz MODELS

 

 

P1707

WHI to Main Harness 120V(0) RED/BLK to Main Harness 240V(0)

WHI/RED from Switch to Relay K-2 & K-8

WHI/ORN from Bag

Sensor Switch(1)

WHI/VIO from

Switch to Relay K-6

WHI/BLU from

Motor to Relay K-4

120V AND 240 VOLT AC MODELS

WHI to Main

Harness (0)

WHI/RED from Switch to Relay K-2 & K-8

WHI/ORN from Bag

Sensor Switch(1)

WHI/VIO from

Switch to Relay K-6

WHI/BLU from

Motor to Relay K-4

120 VOLT DC MODELS

WHI/ORN from Bag

RED from Main Sensor Switch(1) Harness (0)

WHI/RED from

WHI/VIO from

 

Switch to Relay

Switch to Relay K-6

K-2 & K-8

WHI/BLU from

 

 

 

 

Motor to Relay

K-4

230 VOLT AC 50 Hz MODELS

 

 

P3696

 

EARLY MODELS

 

LATE MODELS

FIG. 41 RELAY TERMINALS

 

 

 

 

41

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SERVICE (Cont.)

Relay (Models MHG, FPG-2 DBC, Late Model G-9, G9-2, G9-2 DBC)

FIG 42 RELAY

Location:

The relay is located either on the timer bracket or on the component mounting bracket in the grinder base. The bracket can be removed by loosening the two 8-32 screws beneath the timer dial.

Test Procedure:

1.Disconnect the grinder from the power supply.

2.Access the relay and remove the wires from all terminals.

3.With an ohmmeter, check for continuity between the 0 and 1 terminals.

4.With an ohmmeter, check that there is an open circuit between terminals 2 and 4, and between terminals 6 and 8.

Removal and Replacement

1.Disconnect the grinder from the power supply.

2.Remove all wires from the relay terminals.

3.Remove the two 8-32 screws attaching the relay to the mounting bracket.

4.Refer to Fig 43 when connecting relay wires.

FIG 43 RELAY TERMINALS

If continuity is present as described, reconnect the wires, the relay is operating properly.

If continuity is not present as described, replace the relay.

42

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SERVICE (Cont.)

Hopper Slide Plates (Models G9-2, G9-2 DBC)

 

 

 

M.

 

 

A.

 

 

B.

 

 

C.

 

I.

D.

J.

E.

K.

 

 

F.

L.

 

 

 

 

 

G.

 

 

H.

 

 

P608

 

FIG 44 HOPPER SLIDE PLATES

 

Location:

The slide plates are located on the solenoid mounting plate immediately beneath the hopper openings.

The slide plates must always remain flat for proper operation.

Test Procedure:

With the solenoid mounting plate attached to the hopper, push the solenoid plunger into the coil. The slide plate must move freely in the assembly and snap closed when the plunger is released. Repeat for the other slide plate.

If the slide plates move as described, they are operating correctly.

If the slide plates do not move as described, the problem may be in any one or more of the linkage pieces, springs,slideplates,and/orthe solenoid mountingplate. Disassemble the solenoid mounting plate assembly and inspect all components for free movement.

Replace if excessively worn or damaged.

A.Solenoid Coil

B.Fiber Washer

C.Spring

D.Spring Retaining Washer

E.Solenoid Plunger

F.Snap Ring

G.Short Link

H.Long Link

I.Slide Plate

J.Pivot Pin

K.Stop Block

L.Solenoid Mounting Plate

M.Solenoid Limit Thermostat

Removal and Replacement:

1.Remove the hopper from the grinder.

2.Remove six slotted head screws holding the solenoid mounting panel to the hopper.

3.The slide plate with attached linkage can be lifted off the pivot pin and removed with the solenoid plunger.

4.Refer to the illustration above when reassembling the components.

5.Inspect the slide plates after reassembly. They must move freely.

43

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SERVICE (Cont.)

Hopper Slide Plates (Models MHG)

 

F.

 

B.

A.

D.

 

D.

 

E.

 

FIG 45 HOPPER SLIDE PLATES

Location:

The slide plates are located on the solenoid mounting plate immediately beneath the hopper openings.

The slide plates must always remain flat for proper operation.

Test Procedure:

With the solenoid mounting plate attached to the hopper, push the solenoid plunger into the coil. The slide plate must move freely in the assembly and snap closed when the plunger is released. Repeat for the other slide plate.

If the slide plates move as described, they are operating correctly.

If the slide plates do not move as described, the problem may be in any one or more of the linkage pieces, springs,slideplates,and/orthe solenoid mountingplate. Disassemble the solenoid mounting plate assembly and inspect all components for free movement.

Replace if excessively worn or damaged.

A.Solenoid Coil

B.Slide Gate

C.Slide Gate Support

D.Collector

E.Collector Seal

F.Solenoid Mounting Plate

Removal and Replacement:

1.Remove the hopper from the grinder.

2.Remove six slotted head screws holding the solenoid mounting panel to the hopper.

3.The slide plate with attached linkage can be lifted off the pivot pin and removed with the solenoid plunger.

4.Refer to the illustration above when reassembling the components.

5.Inspect the slide plates after reassembly. They must move freely.

44

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SERVICE (Cont.)

 

 

 

 

 

 

Solenoids (Models MHG, FPG-2 DBC, LPG-2, G9-2, G9-2 DBC)

 

 

 

 

 

 

If continuity is present as described, reconnect the

 

 

wires, and proceed to #7.

 

 

 

 

 

If continuity is not present as described, replace the

 

 

limit thermostat.

 

 

 

 

 

 

7. Check the solenoid for coil action when the control

 

 

 

switch is momentarily pressed to the “START”

 

 

 

(lower) position and released. Plug-in the grinder.

 

 

 

Listen carefully in the vicinity of the solenoid for

 

 

 

a “clicking” sound as the coil magnet attracts and

 

 

 

after a period of time, repels the plunger.

 

 

 

8.

Unplug the grinder.

 

 

 

 

P608

If the sound is heard as described and the plunger

 

remains unable to move or move freely, refer to the

 

FIG 46 SOLENOIDS

 

slide plate section.

 

 

 

 

 

 

 

 

 

 

Location:

If the sound is not heard as described, replace the

solenoid.

 

 

 

 

 

The solenoids are located on the mounting plate

 

 

 

 

 

 

 

 

 

 

 

immediately beneath the hoppers.

Removal and Replacement:

 

 

 

 

 

 

 

 

Test Procedure:

1. Remove the hopper assy from the grinder.

 

2.

Remove the four 8-32 slotted-head screws holding

1.

Unplug the grinder.

 

the solenoid coil to the solenoid panel.

 

2.

Connect a voltmeter across the left or right solenoid

 

 

3.

Feed the white/brown wires through the hole in the

 

coil terminals. Plug-in the grinder. Momentarily

 

 

solenoid mounting plate and loosely install the new

 

press the Off/On/Start switch to “START” (lower)

 

 

 

solenoid coil.

 

 

 

 

 

position and release (hopper selector switch must

 

 

 

 

 

 

4. Look through the collector on the bottom of the

 

be corresponding to the suspect solenoid). The

 

 

assy and adjust the slide plate travel distance when

 

indication must be 120 volts ac for 120V models

 

 

 

installing the solenoid coil.

 

 

 

and 230 volts ac for 230V models.

 

 

 

 

5. Push the solenoid plunger into the solenoid coil

3.

Unplug the grinder.

 

with your hand while moving the coil forward or

 

 

 

If voltage is present as described, proceed to #4.

 

backward in its mounting holes.

 

 

6. Securely tighten the mounting screws when the

If voltage is not present as described, refer to the Wiring

 

slide plate appears to have no metal showing in

Diagram and check the grinder wiring harness.

 

 

the front or back of the hopper hole.

 

4.

Separate the connectors on the white/brown wires

 

 

7. Refer to the following illustration when reconnect-

 

of the solenoids from the connectors on the grinder

 

 

ing the wires.

 

 

 

 

 

wiring harness (RED/BLK) and the limit thermo-

 

 

 

 

 

 

 

 

 

 

 

 

 

stat.

RED/BLK to

 

WHI/YEL to

 

5.

Check for continuity across the white/brown wires

Right Solenoid

 

Timer P4-5

 

 

on the suspect solenoid coil.

RED/BLK to

 

 

 

 

 

 

Timer P4-7

 

 

 

 

If continuity is present as described, reconnect the

 

 

 

 

 

 

white/brown wires to the grinder wiring harness, and

 

 

 

 

 

 

proceed to #6.

 

 

 

 

RED/BLK to

If continuity is not present as described, replace the

 

 

 

 

WHI/ORN to

 

Right

Left Solenoid

solenoid.

 

 

 

Timer P4-4

 

 

 

 

6.

Check for continuity across the terminals of the

Left

 

 

 

 

 

 

 

 

 

limit thermostat.

 

FIG 47 SOLENOID TERMINALS

P612

 

 

 

 

 

45

 

 

 

 

 

 

 

41545 122209

 

 

 

 

 

 

 

SERVICE (Cont.)

Timer (Model LPG-2E)

FIG. 48 TIMER

P1061

 

Location:

The timer is located inside the hopper housing just behind the left solenoid.

Test Procedure:

1.Disconnect grinder from the power source.

2.Insert the leads of a voltmeter set to read at least 120 volts AC, along side the red wire (terminal 8) and the white wire (terminal 2) of the harness plug. Place the Off/On/Start switch in the “ON” center position. Connect the grinder to the power source. The indication must be 120 volts AC.

3.Disconnect the grinder from the power source.

If voltage is present as described, proceed to step #4.

If voltage is not present as described, refer to the wiring diagram and check the grinder wiring harness.

4.Place the hopper selector switch in the left position.

5.Insert the leads of a voltmeter set to read at least 120 volts AC, along side the red wire (terminal 8) and the orange wire (terminal 10) of the harness plug. Place the Off/On/Start switch in the “START” lower position. Connect the grinder to the power source. The indication must be 120 volts AC for the set gate time and return to 0 volts.

6.Disconnect the grinder from the power source.

If voltage is present as described, proceed to step #7.

If voltage is not present as described, replace the timer.

7.Place the hopper selector switch in the right position.

8.Insert the leads of a voltmeter set to read at least 120 volts AC, along side the red wire (terminal 8) and the violet wire (terminal 9) of the harness plug. Place the Off/On/Start switch in the “START” lower position. Connect the grinder to the power source. The indication must be 120 volts AC for the set gate time and return to 0 volts.

9.Disconnect the grinder from the power source.

If voltage is present as described, proceed to step#10.

If voltage is not present as described, replace the timer.

10.Insert the positive (+) lead of a volt meter set to read at least 120 volts DC, along side the black wire (terminal 7) of the harness plug and insert the negative (-) lead along side the white/black wire (terminal 6) of the harness plug. Place the Off/On/Start switch in the “START” lower position. Connect the grinder to the power source. The indication must be 120 volts DC for the set gate time plus clean out time and return to 0 volts.

If voltage is present as described the timer is operating properly.

If Voltage is not present as described, replace the timer.

Removal and Replacement:

1.Disconnect the main wiring harness plug from the terminal block on the timer.

2.Remove the two timer dial knobs located on the rear panel of the grinder.

3.Remove nut and internal tooth lockwasher securing dials to the rear panel.

4.Loosen the two #8-32 pan head screws securing the timer and timer mounting bracket to the motor support plate.

46

41545 122209

 

SERVICE (Cont.)

Timer (Model LPG-2E)

5.Remove timer and timer mounting bracket from the grinder.

6.Remove the four #6-32 keps nuts securing the timer to the mounting bracket. Leave the four spacers on the mounting bracket studs.

7.Place new timer over the studs on the mounting bracket and secure with four #6-32 keps nuts.

8.Slip timer and timer mounting bracket under the two screws on the motor support plate and tighten screws.

9.Locate the left and right timer dials in their proper place on the rear panel and secure with nuts and internal tooth lockwashers.

10.Place timer knobs on timers.

11.Reconnect harness plug to the terminal block on the timer board.

Timer (Models LPG, FPG)

P1748

FIG. 49 TIMER

Location:

The timer is located inside the rear access panel. Adjustments can be made by removing the 2” hole plug.

Test Procedure:

1.Disconnect grinder from the power source.

2.Insert the leads of a voltmeter set to read at least 120 volts AC, along side the red wire (terminal 1) and the white/black wire (terminal 2) of the harness plug. Place the Off/On/Start switch in the “ON” center position. Connect the grinder to the power source. The indication must be 120 volts AC for 120 volt models, 100 volts for 100 volt models, and 230 volts for 230 volt models.

3.Disconnect the grinder from the power source.

If voltage is present as described, proceed to step #4.

If voltage is not present as described, refer to the wiring diagram and check the grinder wiring harness.

4.Insert the positive (+) lead of a volt meter set to read at least 120 volts DC (157 volts DC on units with capacitor), along side the black wire (terminal

3)of the harness plug and insert the negative (-) lead along side the white wire (terminal 6) of the harness plug. Place the Off/On/Start switch in the “START” lower position. Connect the grinder to the power source. The indication must be 120 volts DC for 120 volt models (157 volts DC on units with capacitor), 100 volts for 100 volt models, and 230 volts for 230 volt models for the set time and return to 0 volts.

5.Disconnect the grinder from the power source.

If voltage is present as described the timer is operating properly.

If Voltage is not present as described, replace the timer.

47

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SERVICE (Cont.)

Timer (Model G9)

 

MINUTES-MATICVAC

 

 

-O

120

 

BUNN -

 

 

P/N

2620

 

 

Single set timer shown

 

 

 

Multi set timer (Urn/Carafe) similar

 

FIG 50 TIMER

P1312

 

Location:

The timer is located on the timer bracket in the grinder base. The bracket can be removed by loosening the two 8-32 screws beneath the timer dial(s).

Test Procedure:

1.Disconnect the grinder from the power supply.

2.Check the voltage across terminals TL1 & TL2 with a voltmeter when the “Off/On/Start switch is placed in the “START” (right) position and released. Connect grinder to the power supply. The indication must be:

(a)120 volts ac for two wire 120 volt models.

(b)240 volts ac for two wire 240 volt models.

3.Disconnect the grinder from the power supply.

If voltage is present as described, proceed to step 4. If voltage is not present as described, refer to the Wiring Diagram and check the grinder wiring harness.

4.Remove the white/orange and white/yellow wires from terminals TL3 & TL5.

5.Check for continuity across the white/orange and white/yellow wires when the Off/On/Start switch is placed in the “START” (right) position.

If continuity is present as described, reconnect the white/orange wire to terminal TL3 and the white/yellow wire to terminal TL5, and proceed to step 6.

If continuity is not present as described, refer to the Wiring Diagram and check the grinder wiring harness.

6.Check the voltage across terminals TL1 and TL4 with a voltmeter when the Off/On/Start switch is placed in the “START” (right) position and released. Connect grinder to the power supply. The indication must be:

(a)120 volts ac for two wire 120 volt models.

(b)240 volts ac for two wire 240 volt models.

7.Disconnect the grinder from the power supply.

If voltage is present as described, the timer is operating properly. Refer to the Adjustments section to vary the amount dispensed.

If voltage is not present as described, replace the timer.

Removal and Replacement:

1.Remove all wires from the timer terminals.

2.Remove the four 6-32 screws and nuts holding the circuit board to the timer bracket.

3.Remove the two 6-32 screws and nuts holding the dial plate to the timer bracket.

4.Install the new dial plate and circuit board to the timer bracket.

5.Refer to the illustration below when reconnecting the wires.

6.Refer to the Adjustments section to vary the amount dispensed.

WHI/RED to Relay N.O.

WHI/RED to

Off/On/Start Switch

2

3

 

 

 

 

 

 

 

 

4

 

-

 

5

 

O-

 

 

 

2620MATIC

 

 

120

VAC

WHI to Cordset (120 v) RED/BLK to Cordset (240 v)

WHI/ORA to

Off/On/Start Switch

WHI/GRN to Relay Coil

WHI/YEL to

Off/On/Start Switch

Single set timer shown

Multi set timer (Urn/Carafe) connections are the same

P1313

FIG 51 TIMER TERMINALS

48

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SERVICE (Cont.)

Timer (Model G9-2)

+

VOLTAGE

WARNING

HAZARDOUS

Digital Timer

E TIME

DISPENS

VOLTAGE

WARNING

ARDOUS

HAZ

Analog Timer

P613

FIG 52 TIMER

Location:

The timer is located in the grinder base.

Test Procedure:

1.Unplug the grinder.

2.Connect a voltmeter across contacts 1 & 2 of the larger connector (P4) on the timer board. Plug-in the grinder. The indication must be 120 volts ac for 120V models and 230 volts ac for 230V models.

3.Unplug the grinder.

4.Connect a voltmeter across contacts 2 & 6 of the larger connector (P4) on the timer board. Plug-in the grinder. When the control switch is in any position except “OFF” (center), the indication must be 120 volts ac for 120V models and 230 volts ac for 230V models.

5.Unplug the grinder.

If voltage is present as described, proceed to #6.

If voltage is not present as described, refer to the Wiring Diagram and check the grinder wiring harness.

6.Connect a voltmeter across contacts 3 & 7 of the larger connector (P4) on the timer board. Plug-in the grinder. Momentarily press the Off/On/Start switch to “START” (lower) position and release. The indication must be 120 volts ac for 120V models and 230 volts ac for 230V models.

7.Unplug the grinder.

If voltage is present as described, proceed to #8.

If voltage is not present as described, replace the timer.

8.Connect a voltmeter across contacts 4 & 7 of the larger connector (P4) on the timer board. Plug-in the grinder. Place the hopper selector switch to the left position. Momentarily press the Off/On/ Start switch to the “START” (lower) position and release. The indication must be 120 volts ac for 120V models and 230 volts ac for 230V models and should remain for the approximate timer setting.

9.Unplug the grinder.

If voltage is present as described, proceed to #10.

If voltage is not present as described, replace the timer.

10.Connect a voltmeter across contacts 5 & 7 of the larger connector (P4) on the timer board. Plug-in the grinder. Place the hopper selector switch to the right position. Momentarily press the Off/On/ Start switch to the “START” (lower) position and release. The indication must be 120 volts ac for 120V models and 230 volts ac for 230V models and should remain for the approximate timer setting.

11.Unplug the grinder.

If voltage is present as described, the timer is operating properly.

If voltage is not present as described, replace the timer.

Removal and Replacement:

1.Separate the grinder wiring harness connectors from the timer circuit board.

2.Remove the relay from the timer bracket.

3.Attach the relay to the new timer bracket.

4.Refer to the following illustration when reattaching the connectors.

5.Refer to the Adjustments section to reset the volume dispensed.

49

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SERVICE (Cont.)

Control Board (Model MHG)

FIG 53 CONTROL BOARD

Location:

The control board is located on the component mounting bracket mounted to the grinder base inside the front access panel. The bracket can be removed by loosening the two 8-32 screws securing the bracket to the grinder base.

Test Procedure:

1.Press and hold the upper right hidden button to enter the Programming menus.

2.Scroll to SERVICE TOOLS menu, and press the button under "YES".

3.Press "YES" under TEST OUTPUTS and proceed,through the menus to test the left and right gates, and the grinder motor.

4.Then scroll to the TEST FREQUENCY menu and press the button under "YES".

5.Observe the left, right and center frequency screens, they should read between 124.0 and 126.0 khz.

6.Should any of the outputs or frequency tests fail, first check the continuity of the wiring between the component and the control board. Then test the individual component before replacing the control board.

Removal and Replacement

1.Disconnect the grinder from the power supply.

2.Remove the front access panel.

3.Remove all wires from the control board terminals.

4.Remove the bracket and control board by removing the two 8-32 screws securing the bracket to the grinder base.

5.Remove the six 8-32 screws attaching the control board the the component bracket.

6.Remove the six spacers from the old control board and discard the control board.

7.Install the six spacers to the new control board

8.Attach the control board to the component bracket using the six screws previously removed.

9.Position the bracket and control board assembly in the grinder base and secure with the two 8-32 screws.

10.Reconnect the wires to the control board.

 

J16

J8

 

 

 

 

 

 

 

J12

 

J13

 

 

 

 

J7

J9

 

 

 

 

J5

 

 

 

MOV4

 

 

 

TH3

 

 

 

MOV3

 

 

 

TH2

 

 

 

MOV2

 

 

 

TH1

 

 

 

MOV1

 

 

 

FIG 54 CONTROL BOARD TERMINALS

50

 

 

41545 122209

 

 

 

SERVICE (Cont.)

Control Board (Models FPG-2 & G9-2 DBC)

FIG 55 CONTROL BOARD

Location:

The control board is located inside the hopper housing behind the membrane switch.

Test Procedure:

1.Check the continuity of the wiring between the component and the control board.

2.Test the individual components before replacing the control board.

Removal and Replacement

1.Disconnect the grinder from the power supply.

2.Remove the rear access panel.

3.Disconnect all harness plugs from the control board.

4.Remove the two knurled nuts from the bottom of the control board and remove the control board.

5.Refer to Fig 56 when connecting wires.

MOV4

 

 

MOV3

 

 

MOV2

TH1

J3

MOV1

 

 

TH2

J4

J2

J1

 

 

TH3

 

 

 

J5

 

J9

 

 

 

 

 

J6

J10 J7

J8

 

 

 

 

 

FIG 56 CONTROL BOARD TERMINALS

51

41545 122209

 

SERVICE (Cont.)

Membrane Switches (Model MHG only)

FIG 57 MEMBRANE SWITCH

Location:

The membrane switch is located on the front of the hopper housing.

Test Procedure:

1.Press and hold the right hidden button to enter programming.

2.Scroll through the menus to Service Tools and select YES.

3.Select YES at Test Outputs and scroll through to Test Switches by pressing NEXT.

4.Follow the chart below to test all switches.

If any of the switches indicate a fault, replace the membrane switch.

TEST SWITCHES?

NO YES

PRESS RIGHT

HIDDEN TO EXIT

PRESSING ANY BUTTON

NOTHING PRESSED EXCEPT THE RIGHT HIDDEN

BUTTON WILL DISPLAY

THE BUTTON NAME

ON THE SCREEN

TEST FREQUENCY?

NO YES

Removal and Replacement

1.Disconnect the grinder from the power supply.

2.Remove the rear access panel.

3.Disconnect the membrane switch harness from the control board.

4.Carefully peel the membrane switch from the front of the switch bezel.

5.Remove any excess adhesive from the bezel surface.

6.Remove the backing from the new membrane switch.

7.Feed the membrane switch harness through the openning and apply the new membrane switch to the switch bezel.

8.Connect the switch harness to J9 on the display board.

52

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SERVICE (Cont.)

Membrane Switches (Models FPG-2 & G9-2 DBC)

FIG 58 MEMBRANE SWITCH

Location:

The membrane switch is located on the front of the hopper housing.

Test Procedures:

NOTE: Before continuing, check that the ribbon cable is properly connected to the control board and not a pin off in either direction.

1.Disconnect the dispenser from the power source.

2.Remove the rear panel and disconnect ribbon cable.

3.Check for continuity of the switches using pin #1as common.

A1

- #5

Grind

A2

- #6

Stop

B2

- #10

Hidden Button "Right"

C1

- #2

Large Batch Size "Left"

C2

- #3

Medium Batch Size "Left"

C3

- #4

Small Batch Size "Left"

C4

- #9

Large Batch Size "Left"

C5

- #8

Medium Batch Size "Left"

C6

- #7

Small Batch Size "Left"

 

- #1

Nuetral

If continuity is not present when the appropriate switch is pressed, the Membrane Switch must be replaced. If continuity is present, chech the short harness going to J6 on the Control Board.

Removal and Replacement

1.Disconnect the grinder from the power supply.

2.Remove the rear access panel.

3.Disconnect the membrane switch harness from the control board.

4.Carefully peel the membrane switch from the front of the switch bezel.

5.Remove any excess adhesive from the bezel surface.

6.Remove the backing from the new membrane switch.

7.Feed the membrane switch harness through the openning and apply the new membrane switch to the switch bezel.

8.Connect the switch harness to the control board.

To Control Board J6

 

 

SHIELD

 

 

 

 

 

 

 

 

11

 

 

 

 

 

1

B2

C4

C5

C6

A2

A1

C3

C2

C1

 

 

SWITCH UNIT ASSY

 

 

 

FIG 59 MEMBRANE SWITCH

53

41545 122209

 

SERVICE (Cont.)

EMI Filter (Models FPG & FPG-2)

DBC

GRINDER

FIG 60 EMI FILTER

Location:

The EMI Filter is located inside the rear cover of the grinder housing.

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Disconnect the two red wires and two white wires on the EMI Filter from the EMI Filter wiring harness.

3.Check for resistance between the two red leads on the EMI Filter. (Fig 61)

If resistance is present as described the EMI Filter is operating properly.

If resistance is not present as described, replace the EMI Filter.

Removal and Replacement:

1.Disconnect the wires from the EMI Filter.

2.Remove the two screws securing the EMI Filter.

3.Remove and discard EMI Filter.

4.Install new EMI Filter using two screws to secure EMI Filter to its former location.

5.Refer to schematic when reconnecting the wires.

118.0 kΩ - 118.5 kΩ

Across either pair

FIG 61 EMI FILTER TERMINALS

54

41545 122209

 

SERVICE (Cont.)

Funnel Sensing Coil (Models MHG & G9-2 DBC)

FIG 62 FUNNEL SENSING COIL

Location:

The funnel sensing coil is located inside of the coil cover.

Test Procedure:

1.Disconnect the grinder from the power supply.

2.Remove the two 6-32 screws attaching the coil cover to the front of the grinder housing.

3.Pull slightly away from the housing and disconnect the two wires from the coil.

4.With an ohmmeter, measure the resistance across the pin terminals of the coil. The reading should be 5 to 7 ohms.

If this amount of resistance is not present, replace the funnel sensing coil.

Removal and Replacement

1.Disconnect the grinder from the power supply.

2.Remove the two 6-32 screws attaching the coil cover to the grinder housing.

3.Pull slightly away from the housing and disconnect

the two wires from the coil.

3.Remove the coil from the coil cover.

4.Place the new coil into the coil cover and attach the two wires previously removed.

5.Secure cover with two 6-32 screws.

FIG 63 FUNNEL SENSING COIL TERMINALS

55

41545 122209

 

SERVICE (Cont.)

Memory Clock Board (Model MHG)

FIG 64 MEMORY CLOCK BOARD

Location:

The memory clock board is located on the component mounting bracket mounted to the grinder base inside the front access panel.

Test Procedure:

1.Disconnect the grinder from the power supply.

2.Disconnect the wiring harness on the memory board.

3.Check for 5VDC on J1-4 and J1-5.

If voltage is not present as described the memory board is operating properly.

If voltage is present as described, replace the memory board.

Removal and Replacement

1.Disconnect the grinder from the power supply.

2.Remove the front access panel.

3.Remove the two 8-32 screws securing the component bracket to the grinder base and tilt forward to gain access to the memory clock board.

5.Disconnect the harness from the memory clock board.

6.Remove the two 6-32 nuts attaching the memory clock board to the component bracket.

7.Remove the two spacers from the old board and attach to the new board.

8.Install new memory board using two #6-32 nuts to secure board to the component bracket.

9.Refer to Fig. 65 when reconnecting the wires.

J1-1

MEMORY

BOARD

+5VDC

J1-5

GRN

J16-1

WHI

 

RED

 

BLK

J16-5

 

FIG. 65 MEMORY CLOCK BOARD CONNECTORS

56

41545 122209

 

SERVICE (Cont.)

Display Board (Model MHG)

FIG 66 DISPLAY BOARD

Location:

The display board is located inside the hopper housing behind the membrane switch.

Test Procedure:

1.Press and hold the upper right hidden button to enter the Programming menus.

2.Scroll to SERVICE TOOLS menu, and press the button under "YES".

3.Press "YES" under TEST OUTPUTS and proceed, through the menus to test the left and right gates, and the grinder motor.

4.Then scroll to the TEST SWICHES menu and press the button under "YES". Test each button on the conttrol panel, the button pressed will be displayed on the screen.

Removal and Replacement

1.Disconnect the grinder from the power supply.

2.Remove the two 6-32 screws attaching the membrane switch bezel to the hopper housing.

3.Tilt the bezel assembly forward.

4.Remove the four 8-32 screws attaching the board cover bracket to the switch bezel and remove the bracket.

5.Disconnect the wiring harness from the display board.

6.Remove the four 8-32 screws attaching the display board to the switch bezel and remove the board.

To Control Board J8

 

 

 

BLU GRN YEL ORN

 

 

J10-1

J10-4

 

 

DISPLAY BOARD

J9-1

J9-5

J9-10

J9-15

1

 

 

16

J9-1

 

 

16

FIG 67 DISPLAY BOARD TERMINALS

57

41545 122209

 

TRIAC MAP for MHG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MOV1

controls

 

 

 

Transformer

@ J5-4,5,6

TH1 & MOV2

controls

 

 

 

Left Gate

@ J5-3

TH2 & MOV3

controls

 

 

 

Relay

@ J5-2

TH3 & MOV4

controls

 

 

 

Right Gate

@ J5-1

58

41545 122209

 

TRIAC MAP for FPG-2 DBC and G9-2 DBC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TH1 & MOV1

 

controls

 

Left Gate

 

@ J1-1

 

 

 

 

 

 

 

 

 

 

 

 

 

TH2 & MOV2

 

controls

 

Relay

 

@ J1-2

 

 

 

 

 

 

 

 

 

 

 

 

 

TH3 & MOV3

 

controls

 

Right Gate

 

@ J1-3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MOV4

 

controls

 

Transformer

 

@ J1-4,5,6

 

 

 

 

 

 

 

 

 

 

 

59

41545 122209

 

WIRING DIAGRAMS

 

SCHEMATIC WIRING DIAGRAM

L1

G9-2 DBC, G9-2T DBC W/SMART FUNNEL™

 

B

 

L

 

K

 

LEFT GATE

 

 

 

LIMIT THERMOSTAT

 

 

 

 

 

SOL

 

 

 

 

 

WHI/ORA

J1-6

 

 

RELAY

 

 

 

 

 

 

 

 

 

 

 

COIL

 

 

 

 

 

 

 

WHI/GRN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LIMIT THERMOSTAT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SOL

 

 

 

 

 

WHI/YEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RIGHT GATE

 

 

 

 

 

 

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI

 

CONTROL PC BOARD

 

 

 

 

 

 

 

 

 

 

 

 

RED/BLK

J1-6

J6-10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J8-3

J8-1

J6-5

N

W

H

I

J6-1

Switch Unit Assembly Codes

A1

Grind

A2

Stop

B2

Hidden Button "Right"

C1

Large Batch Size "Left"

C2

Medium Batch Size "Left"

C3

Small Batch Size "Left"

C4

Large Batch Size "Right"

C5

Medium Batch Size "Right"

C6

Small Batch Size "Right"

120 OR 230 VOLTS AC

2 WIRE

SINGLE PHASE

50/60 HZ

FUNNEL SENSOR

WHI/GRN

WHI/VIO

 

 

SHIELD

 

 

 

 

 

 

 

 

11

 

 

 

 

 

1

B2

C4

C5

C6

A2

A1

C3

C2

C1

 

 

SWITCH UNIT ASSY

 

 

 

GRINDER MOTOR

BLK WHI/BLU M WHI

RELAY

CONTACTS

33734.0000G 02/05 © 2001 Bunn-O-Matic Corporation

60

41545 122209

 

WIRING DIAGRAMS

 

SCHEMATIC WIRING DIAGRAM

L1

G9-2 DBC, G9-2T DBC W/SMART FUNNEL™

 

B

 

L

 

K

 

LEFT GATE

 

 

 

LIMIT THERMOSTAT

 

 

 

 

 

SOL

 

 

 

 

 

WHI/ORA

J1-6

 

 

 

 

 

 

 

 

 

 

 

RELAY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/GRN

 

 

COIL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LIMIT THERMOSTAT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SOL

 

 

 

 

 

WHI/YEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RIGHT GATE

 

 

 

 

 

 

 

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI

 

CONTROL PC BOARD

 

 

 

 

 

 

 

 

 

 

 

 

RED/BLK

J1-6

J6-10

 

 

 

 

 

 

 

 

 

 

 

 

 

J8-3

J8-1

J6-5

N

W

H

I

J6-1

 

 

FUNNEL SENSOR

 

 

 

 

 

 

 

 

WHI/GRN

 

 

 

 

 

 

 

 

WHI/VIO

 

 

 

 

 

 

 

 

 

SHIELD

 

 

 

 

 

 

 

 

11

 

 

 

 

1

 

Switch Unit Assembly Codes

 

 

 

 

 

 

 

A1

On/Off

B2

C5

A3

A2

A1

C3

C2

A2

Grind

A3

Stop

 

 

 

 

 

 

 

B2

Hidden Button “Right”

 

 

 

 

 

 

 

C2

Hot Coffee “Full”

 

 

 

 

 

 

 

C3

Hot Coffee “Half”

 

 

 

 

 

 

 

C5

Iced Coffee

 

SWITCH UNIT ASSY

 

 

 

 

 

 

 

GRINDER MOTOR

 

120 OR 230 VOLTS AC

BLK WHI/BLU

 

M

 

WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 WIRE

RELAY

 

 

 

 

 

 

 

 

 

 

 

SINGLE PHASE

CONTACTS

 

 

 

 

 

 

 

 

 

 

 

50/60 HZ

33734.0003A 02/05 © 2005 Bunn-O-Matic Corporation

61

41545 122209

 

WIRING DIAGRAMS

 

SCHEMATIC WIRING DIAGRAM

L1

G9-2TB DBC W/SMART FUNNEL™

 

B

 

L

 

K

 

LEFT GATE

 

 

 

LIMIT THERMOSTAT

 

 

 

 

 

SOL

 

 

 

 

 

WHI/ORA

J1-6

 

 

RELAY

 

 

 

 

 

 

 

 

 

 

 

COIL

 

 

 

 

 

 

 

WHI/GRN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LIMIT THERMOSTAT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SOL

 

 

 

 

 

WHI/YEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RIGHT GATE

 

 

 

 

 

 

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI

 

CONTROL PC BOARD

 

 

 

 

 

 

 

 

 

 

 

 

RED/BLK

J1-6

J6-10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J8-3

J8-1

J6-5

N

W

H

I

J6-1

 

Switch Unit Assembly Codes

A1

Grind

A2

Stop

A3

On/Off

C1

Large Batch Size "Left"

C2

Medium Batch Size "Left"

C3

Small Batch Size "Left"

C4

Large Batch Size "Right"

C5

Medium Batch Size "Right"

C6

Small Batch Size "Right"

 

 

100 VOLTS AC

2 WIRE

SINGLE PHASE

50 HZ

FUNNEL SENSOR

WHI/GRN

WHI/VIO

 

 

SHIELD

 

 

 

 

 

 

 

 

11

 

 

 

 

 

1

A3

C4

C5

C6

A2

A1

C3

C2

C1

 

 

SWITCH UNIT ASSY

 

 

 

GRINDER MOTOR

BLK WHI/BLU M WHI

RELAY

CONTACTS

33734.0004A 03/05 © 2005 Bunn-O-Matic Corporation

62

41545 122209

 

WIRING DIAGRAMS

L1

N

SCHEMATIC WIRING DIAGRAM MHG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRN

 

 

 

 

 

GRN

 

P1, P2, P3 & P4 ARE

 

B

W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PINS OF A POLARIZED

 

L

H

 

 

 

 

 

 

P4

 

 

 

 

 

GRN

 

 

FOUR-PIN CONNECTOR

 

K

I

 

LIMIT

 

 

 

 

 

 

 

 

 

 

RIGHT GATE

 

 

 

 

 

 

 

 

THERMOSTAT

 

 

 

 

 

 

 

 

 

 

WHI

 

 

SOL

WHI/YEL

WHI/YEL

J5-1

 

 

 

 

 

 

 

 

 

 

P2

 

 

 

 

 

 

 

LIMIT

 

 

 

 

WHI/GRN

 

 

 

 

 

 

 

 

 

LEFT GATE

 

 

 

 

 

 

P1 THERMOSTAT

 

 

 

 

 

 

 

 

WHI

 

SOL

 

 

WHI/ORN

WHI/ORN

 

 

 

 

 

 

 

 

 

 

 

P3

 

 

CONTROL PC BOARD

 

 

RELAY

 

 

 

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI

 

COIL

 

 

 

 

 

WHI

J5-5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RIGHT HOPPER SENSOR

 

 

 

YEL

 

 

 

 

 

 

 

 

 

 

 

 

 

J12-1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YEL

 

 

 

 

 

 

 

 

 

 

 

 

 

ORN

 

 

 

 

 

 

LEFT HOPPER SENSOR

 

 

 

ORN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIO

 

 

 

 

 

 

 

 

 

 

 

 

 

VIO

 

 

1

5

 

 

 

 

 

 

 

 

 

J8-1

J8-4

J16-

J16-

 

 

 

 

 

 

 

 

 

 

 

 

GRINDER MOTOR

 

 

 

 

 

 

 

 

 

 

BLK

WHI/BLU

M

WHI

 

 

 

 

BLU GRN YEL ORN

GRN WHI

RED BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RELAY

 

 

 

 

FUNNEL SENSOR

 

 

 

 

 

 

CONTACTS

 

 

 

 

 

 

 

 

 

MEMORY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BOARD

 

 

 

 

 

 

 

 

 

 

J10-1

 

J10-4

 

Switch Unit Assembly Codes

 

 

 

 

 

 

 

 

 

 

A1

Grind

 

 

DISPLAY BOARD

A2

Stop

 

 

J9-10

B1

Hidden Button "Left"

J9-1

J9-5

B2

Hidden Button "Right"

C1

Large Batch Size "Left"

1

 

16

C2

Medium Batch Size "Left"

 

 

 

C3

Small Batch Size "Left"

 

 

 

C4

Large Batch Size "Right"

 

 

 

C5

Medium Batch Size "Right"

 

 

 

C6

Small Batch Size "Right"

 

 

 

D1

"Digital" Left Hidden Button

 

 

STATIC SHIELD

D2

"Brewer" Center Hidden Button

 

 

 

D3

"Control" Right Hidden Button

 

 

 

100 VOLTS AC,

 

 

 

 

 

 

 

 

 

 

 

 

 

120 VOLTS AC,

A2

C5

C6

C4

B2

B1

D3

D2

D1

C3

C2

C1

A1

240 VOLTS AC

 

 

 

 

 

 

 

 

 

 

 

 

 

2 WIRE

 

 

 

 

 

 

 

 

 

 

 

 

 

SINGLE PHASE

 

 

 

 

 

 

 

 

 

 

 

 

 

50/60 HZ

 

 

 

 

 

SWITCH UNIT ASSY

 

 

 

 

 

36399.0000D 08/05 © 2003 Bunn-O-Matic Corporation

63

41545 122209

 

WIRING DIAGRAMS

LI N

SCHEMATIC WIRING DIAGRAM MHG with WD CBA

 

 

 

 

 

 

 

 

 

 

 

WHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LINE

 

 

 

 

 

 

 

CONTROL PC BOARD

 

 

 

 

 

 

 

 

 

 

 

 

 

T1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LOAD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MOTOR RELAY

 

 

 

 

 

 

 

 

 

 

J1

SWITCH UNIT ASSEMBLY CODES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED

A1

 

GRIND

 

 

 

 

 

 

 

 

GRY

K1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIO

 

 

 

 

 

 

 

 

 

VIO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRY

 

A2

 

STOP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ORG

5

B1

 

HIDDEN BUTTON "LEFT"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YEL

 

 

 

 

 

 

 

LEFT GATE RELAY

 

 

 

 

 

 

 

 

 

 

8

B2

 

HIDDEN BUTTON "RIGHT"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C1 LARGE BATCH SIZE "LEFT"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C2 MEDIUM BATCH SIZE "LEFT"

 

 

 

 

 

K2

ORG

 

 

 

 

 

 

 

 

 

 

 

C3 SMALL BATCH SIZE "LEFT"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J12

C4 LARGE BATCH SIZE "RIGHT"

 

 

 

 

 

RIGHT GATE RELAY

 

 

 

 

 

 

 

 

 

YEL

C5 MEDIUM BATCH SIZE "RIGHT"

 

 

 

 

 

 

 

 

 

RIGHT HOPPER

 

 

 

 

1

C6 SMALL BATCH SIZE "RIGHT"

 

 

 

 

 

 

 

 

 

 

 

 

 

COIL

 

 

 

 

YEL

 

D1 "DIGITAL' LEFT HIDDEN BUTTON

 

 

 

 

 

 

 

 

 

 

 

 

 

LEFT HOPPER

 

 

 

 

ORG

 

 

 

 

 

 

GRY

K3

YEL

 

 

 

 

 

 

 

 

 

5

D2

 

"BREWER" CENTER HIDDEN BUTTON

 

 

 

 

 

 

 

 

COIL

 

 

 

 

ORG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D3

 

"CONTROL" RIGHT HIDDEN BUTTON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FUNNEL COIL

 

 

 

 

VIO

9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J19

1

5

10

 

16

 

 

 

 

 

 

LIMIT

 

 

RIGHT GATE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

THERMOSTAT

 

 

 

 

P2

K3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHT

 

 

SOL

WHT/YEL

WHT/YEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LIMIT

 

LEFT GATE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

THERMOSTAT

 

 

 

 

P3

 

K2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHT

P1

WHT

 

 

 

WHT/ORG

WHT/ORG

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SOL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRINDER

 

P4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MOTOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

K1

 

A2

C5

C6

C4

B2

B1

D3

 

D2

D1

C3

C2

C1

A1

STATIC

 

 

 

WHT

 

MTR

WHT/BLU

 

 

 

BLK

 

SHIELD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

 

 

 

 

 

 

SWITCH UNIT ASSY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100 VOLTS AC, 120 VOLTS AC,

240 VOLTS AC

2 WIRE + Gnd

SINGLE PHASE, 50/60HZ

64

41545 111711

 

WIRING DIAGRAMS

 

SCHEMATIC WIRING DIAGRAM

 

L1

 

LPG-2E, LPGB-2E

 

 

N

 

 

 

GRN

 

 

 

BLK

 

 

 

SELECTOR

 

3

 

 

SWITCH

WHI

 

 

 

 

AMP

 

 

 

 

 

 

 

 

 

 

 

 

 

GRN

 

 

 

 

 

1

 

 

 

WHI

 

 

2

 

 

 

 

 

 

 

 

 

TIMER ASSY.

3

BLU

BLK

GRINDER

(Hopper Slide

4

Gate Timer

5

YEL

WHI

 

 

Dial Wiring)

WHI/BLK

RED

M

 

6

 

Right - Brown

BLK

RED

 

 

7

 

 

Left - Orange

RED

 

RED

8

 

 

 

VIO

 

 

 

 

 

9

RT

RED

 

 

ORA

 

 

10

 

 

 

SOL

 

 

 

 

 

 

 

 

OFF/ON/START

RED

SLIDE GATES

 

SWITCH

 

 

LT

RED

 

 

 

 

 

 

RED

RED

SOL

 

 

 

 

YEL

 

 

 

 

 

 

 

 

 

 

WHI

100 VOLTS AC

120 VOLTS AC

2 WIRE

SINGLE PHASE

60 HZ

27103.0000D 04/07 ©1996 BUNN-O-MATIC CORPORATION

65

41545 122209

 

WIRING DIAGRAMS

66

41545 122209

 

WIRING DIAGRAMS

SCHEMATIC WIRING DIAGRAM

LPG & LPG2

L1

 

 

 

GREEN

N

B

 

 

 

W

 

 

 

 

L

 

 

 

 

 

 

 

 

H

K

3

BLK

 

 

 

 

I

 

AMP

 

P1

 

 

RED

RED

 

 

 

1

 

 

 

WHI/BLK

WHI/BLK

 

 

 

2

 

 

 

BLK

BLK

 

 

 

3

 

 

TIMER

WHI/BLU

WHI/BLU

 

 

4

 

 

WHI/BRN

WHI/BRN

 

 

 

5

 

 

 

WHI

WHI

 

 

 

6

 

 

 

GRN

 

 

 

 

 

 

 

 

 

BLK

P2

BLK

 

 

 

1

 

 

 

RED

RED

 

 

 

2

 

 

 

WHI/BRN

WHI/BRN

 

 

 

3

 

 

 

WHI/BLU

WHI/BLU

 

 

 

4

 

 

 

 

 

 

 

 

 

5

 

 

 

 

BLK

P3

BLK

 

 

DC

1

 

 

WHI

WHI

 

MOTOR

2

 

RED

RED

 

3

 

 

 

RED

RED

 

 

 

4

 

 

 

 

 

 

120 VOLTS AC

10529.0000C 3/92

© 1990

BUNN-O-MATIC CORPORATION

 

2 WIRE

 

 

 

 

SINGLE PHASE

 

 

 

 

60 HZ

 

 

 

67

41545 122209

 

WIRING DIAGRAMS

SCHEMATIC WIRING DIAGRAM

L1

LPG-A

L2

B

 

 

 

GRN/YEL

R

 

 

 

 

L

 

 

 

 

 

 

 

 

E

K

3

BLK

 

 

 

 

D

 

 

 

 

 

AMP

RED

P1

RED

 

 

 

1

 

 

 

WHI/BLK

WHI/BLK

 

 

 

2

 

 

 

BLK

BLK

 

 

 

3

 

 

TIMER

WHI/BLU

WHI/BLU

 

 

4

 

 

WHI/BRN

WHI/BRN

 

 

 

5

 

 

 

WHI

WHI

 

 

 

6

 

 

 

GRN

 

 

 

 

 

 

 

 

 

BLK

P2

BLK

 

 

 

1

 

 

 

RED

RED

 

 

 

2

 

 

 

WHI/BRN

WHI/BRN

 

 

 

3

 

 

 

WHI/BLU

WHI/BLU

 

 

 

4

 

 

 

 

 

 

 

 

 

5

 

 

 

 

BLK

P3

BLK

 

 

DC

1

 

 

WHI

WHI

 

 

2

 

MOTOR

RED

RED

 

3

 

 

 

RED

RED

 

 

 

4

 

 

 

 

 

 

230 VOLTS AC

10529.0002E 8/01

© 1990

BUNN-O-MATIC CORPORATION

 

2 WIRE

 

 

 

 

SINGLE PHASE

 

 

 

 

50/60 HZ

 

 

 

68

41545 122209

 

WIRING DIAGRAMS

SCHEMATIC WIRING DIAGRAM

LPG W/Capacitor

L1

 

 

GREEN

N

 

 

 

 

 

 

 

 

W

BLK

BLK

 

 

H

 

 

I

 

 

P1

 

 

RED

RED

 

 

1

 

 

WHI/BLK

WHI/BLK

 

 

2

 

 

BLK

BLK

 

 

3

 

TIMER

WHI/BLU

WHI/BLU

 

4

 

WHI/BRN

WHI/BRN

 

 

5

 

 

WHI

WHI

 

 

6

 

 

GRN

 

 

 

P4

 

 

 

BLK

BLK

 

 

2

 

 

 

WHI/BRN

 

BLK+

_WHI/BRN

1

 

 

 

 

 

 

 

BLK

P2

BLK

 

 

1

 

 

RED

RED

 

 

2

 

 

WHI/BRN

WHI/BRN

 

 

3

 

 

WHI/BLU

WHI/BLU

 

 

4

 

 

 

 

 

 

 

5

 

 

 

BLK

P3

BLK

 

DC

1

 

WHI

WHI

 

2

 

MOTOR

RED

RED

 

3

 

 

RED

RED

 

 

4

 

 

 

 

 

120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ

10529.0003E 10/98 © 1998 BUNN-O-MATIC CORPORATION

69

41545 122209

 

WIRING DIAGRAMS

SCHEMATIC WIRING DIAGRAM

LPG-B

L1

 

 

 

N

B

 

 

 

GREEN

 

 

 

W

L

 

 

 

 

 

 

H

K

3

BLK

 

 

I

 

 

P1

 

AMP

RED

RED

 

 

1

 

 

WHI/BLK

WHI/BLK

 

 

2

 

 

BLK

BLK

 

 

3

 

TIMER

WHI/BLU

WHI/BLU

 

4

 

WHI/BRN

WHI/BRN

 

 

5

 

 

WHI

WHI

 

 

6

 

 

GRN

 

 

 

 

 

 

 

BLK

P2

BLK

 

 

1

 

 

RED

RED

 

 

2

 

 

WHI/BRN

WHI/BRN

 

 

3

 

 

WHI/BLU

WHI/BLU

 

 

4

 

 

 

 

 

 

 

5

 

 

 

BLK

P3

BLK

 

DC

1

 

WHI

WHI

 

2

MOTOR

RED

RED

3

 

 

RED

RED

 

 

4

 

 

 

 

100 VOLTS AC

10529.0001D 10/98 © 1990

2 WIRE

BUNN-O-MATIC CORPORATION

SINGLE PHASE

 

50-60 HZ

 

 

 

70

41545 122209

 

WIRING DIAGRAMS

SCHEMATIC WIRING DIAGRAM G1, G2, G3 & G2 trifecta

L1

230V GRN/YEL

GRN or GRN/YEL

N

L2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100 VOLT AC

120 VOLT AC

230 VOLT AC

240 VOLT AC

2 WIRE + GRD SINGLE PHASE 50/60 HZ

SW1

 

 

 

 

 

 

 

BLK

WHI/RED

K-2 or K-7

WHI/BLU

M

WHI

RED/BLK

 

 

 

 

 

L1

L2

 

 

 

 

K-4

 

 

 

WHI/VIO

K-6

 

 

 

 

 

 

SW2

K-8 or K-9

 

 

 

 

 

 

 

 

 

 

 

WHI/VIO

 

WHI/ORA

K

 

 

WHI

RED/BLK

 

 

1 or A

0 or B

 

 

 

 

 

 

 

 

 

71

41545 072710

 

WIRING DIAGRAMS

SCHEMATIC WIRING DIAGRAM G9

L1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GREEN

 

 

 

 

 

 

N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

 

 

 

 

 

 

 

WHI/RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

W

 

 

 

 

 

 

 

WHI/YEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/RED

 

 

WHI/RED

 

WHI/BLU

 

 

 

 

 

M

WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/GRN

 

 

 

 

 

 

L1

L2

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

K1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

K1 N.O.

 

 

/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O

 

 

 

 

 

 

 

 

 

 

1

2

3

4

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R

 

 

 

 

 

 

 

 

WHI/ORA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A

 

 

 

 

 

 

 

 

 

 

 

 

 

TIMER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPTIONAL KEY SW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120 VOLTS AC

 

2 WIRE

 

SINGLE PHASE

 

60 HZ

10173-0000F 4/91 © 1987 BUNN-O-MATIC CORPORATION

 

SCHEMATIC WIRING DIAGRAM

G9-URN/CARAFE

L1

 

 

 

 

 

GREEN

 

 

N

BLK

WHI/RED

 

 

 

 

 

 

 

WHI

 

 

 

WHI/RED

 

 

 

 

 

 

 

WHI/YEL

 

 

 

WHI/RED

WHI/BLU

 

M

WHI

 

 

 

 

 

 

L1

L2

 

WHI/ORA

 

WHI/GRN

K1

K1 N.O.

 

 

 

 

 

 

 

 

 

1

2 3 4 5

 

 

BRN

 

 

 

 

 

TIMER

ORA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120 VOLTS AC

 

 

ORA

YEL

YEL

 

 

 

 

 

GRN

GRN

 

URN

CARAFE

 

2 WIRE

 

 

 

 

 

 

PIN

 

 

 

 

 

 

SINGLE PHASE

 

 

MULTI-SET SW

 

 

 

 

 

 

 

 

 

 

60 HZ

 

TAN

 

(OPTIONAL)

 

 

 

 

 

 

 

 

 

 

 

10215.0000C 4/97 © 1987 BUNN-O-MATIC CORPORATION

72

41545 122209

 

WIRING DIAGRAMS

SCHEMATIC WIRING DIAGRAM G9A HD

 

 

 

 

 

 

 

 

 

 

 

 

OPTIONAL POWER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INDICATOR LIGHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L1

 

 

 

 

 

 

 

 

 

WHI/RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED/BLK

 

 

 

 

 

GREEN

 

 

 

 

 

 

 

 

L2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

 

 

 

 

 

 

 

 

WHI/RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED/BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/YEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/RED

 

 

WHI/RED

 

WHI/BLU

 

 

 

 

 

 

M

RED/BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L1

 

L2

 

 

 

 

 

 

 

 

 

 

 

WHI/ORA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/GRN

K1

 

K1 N.O.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

230 VOLTS AC

 

 

 

1

 

 

2

 

3

4

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 WIRE + GND

 

 

 

 

 

 

 

 

 

 

TIMER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SINGLE PHASE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

50 HZ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SCHEMATIC WIRING DIAGRAM G9WD-RH

L1

 

 

 

 

GRN

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

 

 

 

 

 

 

 

 

BLK

 

 

BLK

 

 

WHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L1

 

L2

 

 

 

 

 

 

 

 

 

 

 

K1 N.O.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

WHT

 

 

 

 

 

N

WHT

 

1

2

 

 

 

 

BrewWISE Models only

 

BLK

WHT

 

K1

 

 

FUNNEL

 

LINE

VIO

VIO

 

SENSOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T1

 

 

 

 

 

 

 

 

LOAD

 

 

 

 

 

 

 

YEL

YEL

 

 

 

 

 

 

BUTTON

4

5

 

 

 

 

 

 

 

RED

 

 

 

 

 

 

BUTTON

RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED RED VIO VIO

 

 

VIO

VIO

 

 

 

J1

 

 

J12

 

 

 

 

 

1

4

 

1

5

9

 

 

BLK

J7

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

GRN

CONTROL CIRCUIT BOARD

 

 

LOAD

 

 

 

 

 

WHT

 

 

 

 

 

 

TRANSDUCER

 

RED

4

 

 

 

 

 

 

 

 

 

1

5

10

16

 

 

 

 

 

J13

 

 

 

 

A1

GRIND

 

 

 

 

 

 

 

A2

STOP

 

 

 

 

 

 

 

B1

HIDDEN BUTTON "LEFT"

 

 

 

 

 

 

 

B2

HIDDEN BUTTON "RIGHT"

 

 

 

 

 

 

 

C1 LARGE BATCH SIZE "LEFT"

 

 

 

 

 

 

 

C2 MEDIUM BATCH SIZE "LEFT"

 

 

 

 

 

 

 

C3 SMALL BATCH SIZE "LEFT"

 

 

 

 

 

 

 

D1 "DIGITAL' LEFT HIDDEN BUTTON

 

 

 

 

 

 

 

D2

"BREWER" CENTER HIDDEN

 

 

 

 

 

 

 

D3

"CONTROL" RIGHT HIDDEN

 

 

 

 

 

 

 

120 VOLTS AC

 

 

 

 

 

 

 

 

2 WIRE

 

 

 

 

 

 

 

 

SINGLE PHASE

 

 

 

 

 

 

 

 

60 HZ

 

 

 

 

 

 

 

 

41449.0000A 11/09 © 2009 BUNN-O-MATIC CORPORATION

 

 

 

 

 

 

 

 

 

 

73

 

 

 

 

41545 072710

 

 

 

 

 

 

 

 

WIRING DIAGRAMS

SCHEMATIC WIRING DIAGRAM G9

L1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GREEN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N

 

 

BLK

 

 

 

 

 

 

WHI/RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

W

 

 

 

 

 

 

WHI/YEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/RED

 

 

 

 

 

WHI/RED

 

WHI/BLU

 

 

 

 

 

 

 

 

M

 

 

 

WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/GRN

 

 

K1

 

 

 

 

K1 N.O.

 

 

 

L1

 

 

 

L2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O

 

 

 

 

 

 

 

 

 

 

1

 

2

 

3

 

4

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R

 

 

 

 

 

 

 

 

WHI/ORA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ORA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPTIONAL KEY SW

 

 

TIMER

 

 

 

 

 

 

 

 

TAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120 VOLTS AC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PNK

 

 

 

 

PNK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 WIRE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SINGLE PHASE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

60 HZ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2 3 4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPTIONAL BREWER

 

OPTIONAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10388-0000B 12/88 © 1988 BUNN-O-MATIC CORPORATION

INTERFACE CONNECTOR

 

MULTI-SET SW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SCHEMATIC WIRING DIAGRAM G9

L1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GREEN

 

 

N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

 

 

 

 

 

 

 

 

 

 

 

WHI/RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/YEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/RED

 

WHI/BLU

 

 

M

 

 

 

WHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/ORA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/GRN

 

 

K1

 

 

 

 

 

 

 

L1

L2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

K1 N.O.

 

 

 

OPTIONAL KEY SW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/ORA

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

2

 

3

 

4

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TIMER

 

 

 

 

 

 

 

 

 

GRY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120 VOLTS AC

 

 

 

 

 

 

 

 

 

 

 

OPTIONAL BREWER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PNK

 

 

 

 

 

 

 

 

 

2 WIRE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INTERFACE CONNECTOR

 

 

 

 

 

 

SINGLE PHASE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<