Bunn IMIX-3 SERVICE MANUAL

IMIX® &

IMIX®-S+

SERVICE & REPAIR MANUAL

BUNN-O-MATIC CORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

PHONE: [phone] FAX: [phone]

42032.0000C 07/13 ©2009 Bunn-O-Matic Corporation

BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY

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

1) Airpots, thermal carafes, decanters, GPR servers, iced tea/coffee dispensers, MCP/MCA pod brewers thermal servers
and Thermofresh servers (mechanical and digital)- 1 year parts and 1 year labor.

2) All other equipment - 2 years parts and 1 year labor plus added warranties as specified below:
a) Electronic circuit and/or control boards - parts and labor for 3 years.
b) Compressors on refrigeration equipment - 5 years parts and 1 year labor.
c) Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis - parts

and labor for 4 years or 40,000 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, non periodic cleaning and descaling, equipment failures related to poor water quality,
damage or casualty. In addition, the warranty does not apply to replacement of items subject to normal use including but
not limited to user replaceable parts such as seals and gaskets. This warranty is conditioned on the Buyer 1) giving BUNN
prompt notice of any claim to be made under this warranty by telephone at [phone] 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, A Partner You Can Count On, Air Infusion, 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, Air Brew, Beverage Bar Creator, Beverage
Profit Calculator, Brew better, not bitter., BUNNSource, Coffee At Its Best, Cyclonic Heating System, Daypart, Digital Brew­er Control, Element, Milk Texturing Fusion, Nothing Brews Like a BUNN, Pouring Profits, Signature Series, Sure Tamp, Tea
At Its Best, The Horizontal Red Line, Ultra are either trademarks or registered trademarks of Bunn-O-Matic Corporation.
The commercial trifecta® brewer housing configuration is a trademark of Bunn-O-Matic Corporation.

2

42032 021513

INTRODUCTION

Safety first!

To avoid electrical shock, unplug dispenser from power source before servicing inside.

Basic Maintenance

In order to maintain proper machine operation, a Preventative Maintenance schedule must be performed on a
regular basis.

The following procedures pretain to all versions in the IMIX family of machines unless otherwise noted.

CONTENTS

Warranty ...................................................................................................................................2

User Notices .............................................................................................................................3

Site Preparation .......................................................................................................................3

Preventive Maintenance

Recommended Cleaning ....................................................................................................4

Preventive Maintenance Schedule ....................................................................................... 5

Troubleshooting ........................................................................................................................ 6

Service .................................................................................................................................... 11

Electrical Schematics ..............................................................................................................43

USER NOTICES

All notices on this equipment are written for your protection. All notices are to be kept in good condition.

Replace any unreadable or damaged labels.

SITE PREPARATION

A minimal clearance is required between the dispenser sides and the wall or another appliances. Leave some
space so the dispenser can be moved for cleaning.

3

42032 072513

CLEANING

The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all sur­faces on Bunn-O-Matic equipment. Do NOT clean this equipment with a water jet device.

1 x 24h

1. Rinse out Whipper Chambers by placing RINSE/RUN
switch in the "RINSE" position and activating DISPENSE
switches.

2. Turn elbow up, remove Hoppers, refill with product and
replace hoppers into dispenser

3. Empty Drip Tray and wash in a solution of dish detergent.

1 x 7d

7

8

.

Whipper Models only
Modelos batidor sólo

5

7

6

4

1. Para limpiar las camaras de mezcla, coloque el interruptor en la
posicón ENJUAGUE/MARCHA (”RINSE/RUN”) y pulse el boton

para espumar y distribuir la bebida (”DISPENSE”).

2. Gire el codo hacia arriba, remueva las tolvas, llene las tolvas con
producto y coloque las tolvas nuevamente en la maquina.

3. Vacie la bandeja de goteo y limpiela con un detergente liquido
suave no abrasivo.

1

2

3

a. Wash
b. Rinse
c. Sanitize
d. Dry

a

b

c

a. Lave
b. Enjuague
c. Desinfecte
d. Seque

NOTICE

The cleaning instructions noted above are for non-dairy sugar based food products. When dispensing any other food product,
the cleaning cycle for the whipping chamber assembly and ejector elbow must be performed daily.

NOTA:

Las instrucciones de limpieza descritas anteriormente excluyen productos lacteos azucarados. La limpieza de las camaras
de mezcla y de los codos de salida de cada tolva deberá realizarse diariamente.

37254.0003A 02/13 © 2013 BUNN-O-MATIC CORPORATION

or

4

42032 072513

REQUIRED REGULAR MAINTENANCE:

When performing Daily-Weekly Cleaning procedures, inspect o-rings, seals, and bushings for signs of wear or
damage and replace immediately.

Rinse once or twice daily or as required. On models IMIX-3, 4, 5, 3S+, & 5S+ a rinse reminder can be set using
the Rinse Alarm.

Check and/or replace every 6 months or as required:

32906.0001 Mixing Chamber Kit (Includes items indented below)

25732.0000 Steam Collector

25733.0003 Mixing Chamber

25734.0000 Whipper Chamber

25736.0000 Dispense Tip

24733.0010 O-ring

25902.0000 Frother

26356.0000 Shaft Seal

28866.0000 Receptacle

25903.0000 Elbow

Check and/or replace every 3 months or as required:

26356.1000 Whipper Shaft Seal Kit (Contains 6 Seals)

5

42032 060109

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qualiedservicepersonnel.

• Allelectroniccomponentshave120voltacand/orlowvoltagedc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.

• Keepawayfromcombustibles.

WARNING – • Exerciseextremecautionwhenservicingelectricalequipment.
  • Unplugthedispenserwhenservicing,exceptwhenelectricaltestsarespecied.
  • Followrecommendedserviceprocedures
  • Replaceallprotectiveshieldsorsafetynotices

PROBLEM PROBABLE CAUSE REMEDY

Product will not dispense:

-no water and no powder (#2,3,7,11)

-yes water and no powder (#6,9,10,12)

-no water and yes powder (#1,4,5,8)

1. No water

2. No power or incorrect voltage to the
dispenser

3. Dispense switch

Water lines and valves to the dispenser must be
open. Read display for error.

Check for 120 volts at the terminal block across
the black and white wires on a two wire 120 volt
dispenser

Test dispense switch circuit, see “TEST SWITCH­ES ?” under “DIAGNOSTICS ?” menu.

4. Dispense solenoid valve

5. Solenoid valve (inlet)

6. Auger drive

7. Overflow protection Switch

8. Lime build-up

9. Hopper not seated on panel

10. Hopper out of product

11. Rinse cycle not run within pro­grammed time frame

Test dispense solenoid valve circuit, see “TEST
DISPENSE HEAD ?” under “DIAGNOSTICS ?”
menu.

Test inlet solenoid valve, see “TEST REFIL ?”
under “DIAGNOSTIC ?” menu. Read display for
error.

Test auger motor circuit, see “TEST DISPENSE
HEAD ?” under “DIAGNOSTICS ?” menu.

Check for water in overflow cup. Read display
for error.

Inspect tank assembly for excessive lime depos­its. Delime as required.

Seat hopper so that front leg engages metal tab
on hopper panel.

Refill hopper with correct product

Refer to Operations – Rinse Timer

12. Low product detect on and low pow­der.

6

Remove hopper to check level or calibrate hop­per

42032 060109

TROUBLESHOOTING (cont.)

PROBLEM PROBABLE CAUSE REMEDY

Water is not hot

1. Limit thermostat

Disconnect power and disconnect limit thermo­stat from wiring harness and test for continuity

Spitting or excessive steaming

Dripping from dispense tip

2. Control thermostat

3. Triac

4. Tank heater

1. Lime build up

2. Control thermostat

1. Lime build up

2. Dispense Solenoid Valve

(A) Check tank temperature setting in Program­ming menu
(B) Check temperature probe function and cali­bration, see “CAL tank temp” under “CALIBRA­TION ?” menu

Test triac, use “TANK HEATER ?” under “DIAG­NOSTICS ?” menu

Disconnect wire leads from tank heater, check
for continuity across tank heater leads.

Inspect tank assembly for excessive lime depos­its. Delime as required.

(A) Check tank temperature setting in Program­ming menu
(B) Check temperature probe function and cali­bration, see “CAL tank temp” under “CALIBRA­TION ?” menu

Inspect tank assembly for excessive lime depos­its. Delime as required.

Remove the dispense solenoid valve and clear
any obstructions. Rebuild or replace valve as
necessary.

Water flows into tank continuously

Product overflows mixing chamber

1. Level probe

2. Solenoid valve (inlet)

3. Control board

1. Dispense tip

2. Dispense solenoid valve

3. Vacuum fan

Check for lime buildup on level probe. Clean as
required.

Test inlet solenoid valve, see “TEST REFIL ?” un­der “DIAGNOSTIC ?” menu

Test inlet solenoid valve circuit, see “TEST REFIL
?” under “DIAGNOSTIC ?” menu

Check dispense tip for obstructions.

Check valve flow rate.

Check vacuum fan operation.

7

42032 060109

TROUBLESHOOTING (cont.)
PROBLEM PROBABLE CAUSE REMEDY

Weak product

1. Water temperature

Place an empty container beneath the dispense
tip. Initiate a dispense cycle and check water
temperature immediately below the dispense
tip with a thermometer. Repeat until maximum
temperature is reached. Reading should be 185
– 190°F. Adjust tank temperature setting using
programming menus.

2. Whipper motor

3. Frother

4. Dispense solenoid valve

5. Auger motor

6. Auger spring

7. NORMAL/PROGRAM/RINSE switch

8. Hopper out of product

9. Incorrect throw weight

Test whipper motor circuit, see “TEST DISPENSE
HEAD ?” under “DIAGNOSTICS ?” menu.

Check that frother is properly installed; refer to
cleaning decal inside front door.

Test dispense solenoid valve flow rate. In the
“RINSE” mode, momentarily press dispense
switch, and catch water in calibrated container.
Unit should dispense 12±.5 oz during 10 second
rinse cycle.

Test auger motor circuit, see “TEST DISPENSE
HEAD ?” under “DIAGNOSTICS ?” menu

Check that auger spring is properly installed, re­fer to cleaning decal inside of front door.

Check that switch is set in the “NORMAL” posi­tion.

Refill hopper with correct product

Check throw weight

Dispenser making unusual noises

Excessive dust

Display not lit

1. Plumbing lines

2. Water Supply

3. Tank heater

4. Frother

1. Fan

1. Lamp

2. Ballast

3. Night Mode

Plumbing lines should not be resting on the
counter top.

Water pressure to the dispenser not to exceed
90 psi (620 kPa) Install a regulator if necessary
to lower the working pressure to approximately
50 psi (345kPa).

Remove and clean lime off tank heater

Check for cleanliness and correct installation of
chamber and frother

(A) remove powder tray and clean as required
(B) check that air is blowing from slots in dis­penser bottom panel.

Replace lamp if required

Disconnect ballast from power supply, check for
continuity between two black leads.

Check Night Mode Switch

8

42032 060109

TROUBLESHOOTING (cont.)

PROBLEM PROBABLE CAUSE REMEDY

LCD screen displays:

“FILL TIME TOO LONG”,

“CHECK WATER SUPPLY”

Occurs when refill runs without dispens­es and without satisfying tank probe for
more than 10 minutes

(A) Test inlet solenoid valve, see “TEST REFIL ?”
under “DIAGNOSTIC ?” menu
(B) Check that unit is connected to water supply,
and water supply is turned on.

LCD screen displays;

“HEATING TIME”

“TOO LONG”

“CHECK HEATING” “CIRCUIT”

LCD screen displays: “OVERFLOW

CUP”

“FULL, EMPTY CUP”

“CHECK REFILL”

“CIRCUIT”

LCD screen displays:

“TANK TEMP SENSOR”

“OUT OF RANGE”,

“CHECK FOR BAD” “CONNECTIONS”

LCD screen displays:

“TANK TEMP SENSOR”

“OUT OF RANGE”,

“CHECK WIRE FOR” “SHORTS”

LCD screen displays:

“AUGER 1 FAULT!”

“CHECK MOTOR WIRING”,

“CHK RPM SENSOR”

“CHK MOTOR WIRING”

LCD screen displays:

“DISPLAY BOARD”

“COMM FAULT!”

“CHECK DISPLAY”

“ WIRING CONNECTS”

LCD screen displays:

“HOPPER 1 EMPTY?”

“MUST FILL HOPPER”

Occurs when heater runs for more than
120 minutes, refill does not come on , and
tank is still below target temperature.

Occurs when overflow cup is full of wa­ter

Occurs when tank sensor is disconnected
or resistance to high

Occurs when tank temperature sensor
wires are shorted together, or resistance
is to low.

Occurs when auger motor should be run­ning, but no pulses are detected from the
RPM sensor

Occurs if display communication lost

Not applicable on (S)

Occurs when low powder sensor returns
a value lower than threshold

Not applicable on (S)

See “water is not hot” in PROBLEM section
above.

(A) Empty overflow cup of water
(B) Check for lime on level probe
(C) Test inlet solenoid valve, see “TEST REFIL ?”
under “DIAGNOSTIC ?” menu
(D) Check float switch for continuity

(A) Check that tank temp sensor is connected to
main wiring harness.
(B) Test tank temp sensor, see “CAL tank temp”
under “CALIBRATION ?” menu
(C) Verify wiring

(A) Disconnect tank temperature from main wire
harness, check for zero resistance across leads.
(B) Test tank temp sensor, see “CAL tank temp”
under “CALIBRATION ?” menu
(C) Verify wiring

Test auger motor circuit, see “TEST DISPENSE
HEAD ?” under “DIAGNOSTICS ?” menu

(A) Check wiring between main control board
and display
(B) Replace display board

(A) fill hopper with correct product

LCD screen displays:

“DISPNSE TO LONG”

“CHECK SWITCHES”,

“CHECK WIRE FOR”

“SHORTS”

LCD screen displays:

“RINSE REQUIRED!”

PLEASE RINSE NOW”

“TO OPERATE”

LCD screen displays:

“ENTER SETUP MODE”

“TO CLEAR FAULT”

Occurs when hot water is dispensed for
more than 2 minutes

Occurs when a rinse has not been per­formed within the specified time period
and the rinse alarm is enabled.

All fault messages show this for the last
of 3 alternating screens.

9

(B) Calibrate hopper level sensor, see “CAL HOP­PER 1 ?” under “CALIBRATION ?” menu
Test dispense switch circuit, see “TEST SWITCH­ES ?” under “DIAGNOSTICS ?” menu.

Refer to Operations – Rinse Timer

Enter “SETUP” mode to clear fault after problem
has been corrected.

42032 071312

NOTES

10

42032 060109

SERVICE

This section provides procedures for testing and replacing various major components used in this dispenser
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 dispenser should be disconnected from the power source when servicing, except when electrical
tests are required and the test procedure specifically states to connect the dispenser to the power source.

COMPONENT ACCESS
WARNING - Disconnect the dispenser from the power source before the removal of any panel or the replacement

of any component.

All components are accessible by opening the door, removal of the door panels, dispenser top covers,
hopper(s), hopper support plate, splash guard, splash panel w/drip tray, lower front access panel and rear ac­cess cover.

Refer to the contents listing for component location.

INDEX

Access Panels .................................................................................................................................. 12

Audio Indicator ................................................................................................................................13

Auger Drive Components ................................................................................................................. 14

Ballast ..............................................................................................................................................17

Control Board (Main) .......................................................................................................................18

Programming Touchpad...................................................................................................................22

Programming Calibration & Diagnostics .......................................................................................... 23

Control Board (Memory, Early Models) ............................................................................................24

Temperature Probe...........................................................................................................................25

Dispense Switches ........................................................................................................................... 26

EMI Filter ..........................................................................................................................................28

Vacuum Fan .....................................................................................................................................29

Frother & Whipper Motor ................................................................................................................. 30

Lamp Holder ....................................................................................................................................32

Lamp ................................................................................................................................................ 32

LED Lighting ....................................................................................................................................33

Limit Thermostat ..............................................................................................................................34

ON/OFF/NIGHT Switch .....................................................................................................................35

NORMAL/PROGRAM/RINSE Switch ................................................................................................36

Overflow Protection Switch .............................................................................................................. 37

Solenoid (Inlet) ................................................................................................................................38

Solenoid (Dispense) ......................................................................................................................... 39

Tank Heater ...................................................................................................................................... 40

Transformer .....................................................................................................................................41

Triac ................................................................................................................................................. 42

11

42032 060109

SERVICE(CONT.)

ACCESS PANELS

Location:
All access panels are similar through the whole IMIX family (IMIX-5 shown). Before removing panels, make
sure power is OFF to the machine and water is disconnected accept where indicated in testing procedures. Retain
all screws and other attaching hardware for re-assembly.

FIG. 1 ACCESS PANELS

12

42032 060109

SERVICE(CONT.)

AUDIO INDICATOR (IMIX-3, 4 & 5 only)

FIG. 2 AUDIO INDICATOR

BEEPER

Location:

The BEEPER is located on the back side of the
component bracket assembly.

P3250.25

Removal and Replacement:

1. Disconnect the dispenser from power.

2. Disconnect the two pin connector from J8 of the
main control board.

3. Loosen two screws from underneath and remove
the component mounting bracket.

4. Remove the two #6-32 screws attaching the Audio
Indicator to the component mounting bracket.

5. Remove and discard the audio indicator.

6. Install new audio indicator using two #8-32 screws
to secure indicator to the component bracket.

7. Refer to Fig. 3 when reconnecting the wires.

Test Procedures:

1. Enter Programming to verify the “Audible Alarm”
is activated. It will always beep when pressing
switches during program modes.

AUDIBLE ALARM ?

NO EXIT YES

If activated, verify it is plugged correctly into J8 on the
control board.

BLK to J8-1
on Control Board

RED to J8-2
on Control Board

P3250.25

FIG. 3 AUDIO INDICATOR

BEEPER

Specifications:

SOUND PRESSURE LEVEL 90 dBA
RESONANT FREQUENCY 2800 Hz
RATED CURRENT 7 mA
RATED VOLTAGE 12 VDC
OPERATING VOLTAGE 3 - 28 VDC

13

42032 060109

SERVICE (CONT.)

AUGER DRIVE COMPONENTS

P1341

FIG. 4 AUGER DRIVE COMPONENTS

Location:
The auger components are located inside the bottom
part of the hopper except for the auger drive bracket,
washer and locknut, which are located on the outside
bottom rear of the hopper. The auger motors are located
on the rear of the auger motor mounting panel. Refer
to Fig. 5 for disassembly and assembly.

Test Procedures - Auger Motors without Proximity

Sensor

1. Disconnect the dispenser from the power source.

2. Remove hoppers. Turn elbow up.

3. Back probe check the voltage across the positive
and negative wire with a voltmeter. Connect the
dispenser to the power supply. With the rinse/run
switch in the run position press the appropriate
dispense switch. After a .6 second delay the indica­tion must be 4.0 to 24.5 volts dc.

4. Disconnect the dispenser from the power supply.

If voltage is present as described and the auger motor
does not rotate, replace the auger motor.
If voltage is not present as described, refer to the wir­ing diagrams and check the dispenser wiring harness
back to control board. Also verify 24 vac is supplied
to control board from transformer - Refer to Control
Board Testing.

Test Procedures - Auger Motors with Proximity Sensor.

(IMIX only)

1. Open door and flip switch into PROGRAM mode.

2. Scroll to Diagnostics and select YES.

3. Scroll to Test Augers.

4. Press the appropriate dispense switch to activate
motor. Refer to Diagnostics for further direction.

Removal, Cleaning and Replacement:
Hopper & Auger:

1. Open the dispenser door and turn elbow up.

2. Lift the front edge of hopper assy over the tab on
hopper support plate (16) and slide hopper as­sembly out the front of the dispenser.

3. Remove hopper lid (1) and empty product.

4. Pull off the ejector elbow (10).

5. Remove agitator disk assy (2) by pushing out on
the side of the hopper, rotating the agitator disk
assy out of the mounting hubs and lifting the
agitator disk assy from the hopper. Remove the
mixing blades (4) from the agitator disk by tugging
sharply.

6. Remove auger (9) by pulling it out the front of the
hopper (8).

7. Remove the auger drive bracket by turning it clock­wise while holding the auger drive shaft firmly.

8. Slide auger drive shaft (5) from auger drive shaft
bushing (3) and remove from hopper (8).

9. Remove locknut (7) from auger drive shaft bush­ing (3) and remove auger drive shaft bushing from
hopper (8).

10. Wash components in a mild solution of dish deter­gent using a bristle brush when needed.

11. Rinse and dry each item thoroughly.

12. Check for damaged or broken components, replace
any if necessary and reassemble hopper assem­bly.

13. Install hopper assy in the dispenser by sliding
hopper assy in the guides on the hopper support
plate (16) until the slot in the bottom rear the hop­per seats against the shoulder screw (15) in the
hopper support plate.

14

42032 060109

SERVICE (CONT.)

AUGER DRIVE COMPONENTS

6 17

18

12 7

11

15

13 14

FIG. 5 AUGER DRIVE & HOPPER DISASSEMBLY

1

4
2
3

5

8

16

9

10

P2210.30

3. Remove the #8-32 locking screws, located inside

the dispenser housing on the front of the auger
motor mounting panel (11), securing auger motor
(13) to the rear of the auger motor mounting panel
(11).

4. Disconnect the wires from the auger motor (13) to

be removed.

5. Disconnect RPM sensor plug.

6. Remove auger motor (13) and dust seal (14) as an

assembly.

7. Remove dust seal (14) from auger motor (13).

8. Remove the #8-32 screws securing the auger motor

to the auger motor mounting bracket.

9. Remove auger motor and discard.

10. Using #8-32 screws, install new auger motor (13)

on mounting bracket (11).

11. Install dust seal (14) on auger motor shaft.

12. Using #8-32 locking screws install auger motor and

dust seal to the rear of the auger motor mounting
panel (11)

13. Reconnect the wires to the terminals on the auger

motor.

14. Reconnect RPM sensor plug.

15. Install hopper support plate (16) and all hopper

assemblies.

16. Refer to Fig. 6 when reconnecting wires.

1. Hopper Lid

2. Agitator Disk Assy

3. Auger Drive Shaft
Bushing

4. Mixing Blade

5. Auger Drive Shaft

6. Auger Shaft Coupling

7. Locknut

8. Hopper

9. Auger Wire

10. Ejector Elbow

11. Auger Motor Mount­ing Panel

12. Auger Drive Coupling

13. Auger Motor

14. Dust Seal

15. Shoulder Screw

16. Hopper Support plate

17. Coupling Spring

18. Hex Coupling

Auger Drive Motor (Refer to Figs. 5 thru 9)

1. Remove all hopper assemblies and set aside for
reassembly.

2. Remove the four #8-32 screws securing the hopper
support plate (16) and set aside for reassembly.

15

BLK (-)

4-24 VDC

RED (+)

FIG. 6 AUGER MOTOR TERMINALS

P1639

42032 060109

SERVICE (CONT.)

AUGER MOTOR PROXIMITY RPM SENSOR (IMIX-3, 4 & 5 only)

MAGNET

NUT &
LOCKWASHER

PROXIMITY
SENSOR

FIG. 7 AUGER MOTOR PROXIMITY SENSOR

Location:

The Proximity Sensor and Magnet are located on

the back side of the Auger Motor assembly.

Test Procedures:

1. Ensure the the nut and lockwasher are tightened
securely to prevent the Magnet from slipping, which
causes a false reading when testing.

2. With a voltmeter, back probe the RED and BLK
wires. The indication should be +5VDC.

3. Back probe the BLK and GRN wires. The indication
should be an alternating reading of 5-0-5-0VDC.
With power ON, the reading will actually fluctuate
in the 3VDC range.

If voltage is present as described, the Proximity RPM
Sensor is operating properly.

BLK - COMMON
GRN - SIGNAL
RED - +5VDC

FIG. 8 PROXIMITY SENSOR TERMINALS

Removal and Replacement:

1. Disconnect the dispenser from the power source.

2. Disconnect the three pin connector from the main
wirring harnes of the motor being serviced.

3. Remove the #10 nut and lockwasher securing the
magnet hub to the auger motor shaft.

4. Remove the two #4-40 screws securing the sensor
to the auger motor housing.

5. Remove and discard faulty parts.

6. Install a new sensor to the motor housing using
the two #4-40 screws.

7. Install a new magnet hub using the #10 lockwasher
and nut. Tighten the nut securely to prevent the
magnet from slipping.

8. Connect the three pin connector to the dispenser
main wiring harness.

16

42032 060109

SERVICE (cont.)

BALLAST

Removal and Replacement:

1. Disconnect the wires from the ballast.

2. Remove the two #8-32 screws securing the ballast

to the component bracket.

3. Remove and discard ballast.

4. Install new ballast using two #8-32 screws to se-

cure ballast to the component bracket.

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

P3250.25

FIG. 9 BALLAST

Location:
The front door lamp ballasts are located behind

the front access panel and may be on either side of the
component bracket assembly.

Test Procedure:

1. Disconnect the dispenser from the power source.

2. Disconnect the two black leads on the ballast from
the dispenser main harness.

3. Check for continuity between the two black leads
on the ballast.

If continuity is present as described the ballast is op­erating properly.
If continuity is not present as described, replace the
ballast.

BLK to Main Wiring
Harness

FIG. 10 BALLAST TERMINALS

P1447

17

42032 060109

SERVICE (cont.)

CONTROL BOARD (IMIX-3, 4 & 5 only)

P3250.25

FIG. 11 CONTROL BOARD

Location:
The Control Board is located behind the lower front
access cover mounted on the component bracket.

Test Procedure:
Power Supply Circuitry:

1. Disconnect the dispenser from the power source.

2. With a voltmeter, back probe check the voltage
across pins 4 & 5 of the J2 connector on the wir­ing harness. Connect the dispenser to the power
source. The indication must be 24 volts ac.

3. Disconnect the dispenser 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
Diagrams and check the dispenser wiring harness back
to the transformer (See TRANSFORMER).

If voltage is present as described, proceed to step 9.
If voltage is not present as described, refer to the Wir-
ing Diagrams and check the dispenser wiring harness
back to the power cord. Also check for an open float
switch.

Liquid Level Control Circuitry:

6. Gently pull the liquid level probe out of the tank lid
and inspect for corrosion. Replace it if necessary.

7. Place the probe so that neither end is in contact
with any metal surface of the dispenser.

8. With a voltmeter, check the voltage across J1 pins 4
and 8 on the control board. Connect the dispenser
to the power source. The indication must be:

a) 120 volts ac for two wire 120 volt models, three

wire 120/208 volt and 120/240 volt models,

b) 240 volts ac for two wire 240 volt models,
c) 230 volts ac for two wire 230 volt models, after

a delay of approximately 10 seconds.

9. Move the probe’s flat end to the dispenser housing.
The indication must be 0.

10. Move the probe’s flat end away from the housing.
The indication must, again, be:

a) 120 volts ac for two wire 120 volt models, three

wire 120/208 volt and 120/240 volt models,

b) 240 volts ac for two wire 240 volt models,
c) 230 volts ac for two wire 230 volt models, after

a delay of approximately 5 seconds.

11. Disconnect the dispenser from the power source.

If the voltage is present as described, re-install the
probe. The liquid level control circuitry is operating
properly.
If the voltage is not present as described, check the pink
probe wire and green tank wire for continuity.

4. With a voltmeter, back probe check the voltage
across pins 3 & 4 of the J1 connector on the wir­ing harness. Connect the dispenser to the power
source. The indication must be:

a) 120 volts ac for two wire 120 volt models, three

wire 120/208 volt and 120/240 volt models.

b) 240 volts ac for two wire 240 volt models.
c) 230 volts ac for two wire 230 volt models.

5. Disconnect the dispenser from the power source.

18

42032 060109

SERVICE (cont.)

CONTROL BOARD (cont.)

Removal and Replacement:

1. Loosen the two #8-32 screws securing the com-

ponent mounting bracket to the dispenser base.

2. Carefully pull the entire component bracket forward

and rotate to gain access to the control board.

3. Disconnect all the plugs on the main wiring harness

from the connectors on the control board.

4. Remove the four #6-32 screws securing the control

board to the component bracket.

5. Remove the spacers from the control board and

discard.

6. Install the spacers on to the new control board

7. Install new control board on the component bracket

using four #6-32 screws.

NOTE: Verify the ground wire is connected to the board
mounting screw.

8. Reconnect all plugs on the main harness to the

connectors on the control board.

P1640

FIG. 12 CONTROL BOARD CONNECTORS

19

42032 060109

SERVICE (cont.)

CONTROL BOARD (IMIX-3S+ & 5S+ only)

FIG. 13 CONTROL BOARD

P3250.25

If voltage is present as described, proceed to step 6.
If voltage is not present as described, refer to the wiring
diagram and check the dispenser wiring harness back
to the power cord.

6. Gently pull the liquid level probe out of the tank lid
and inspect for corrosion. Replace it if necessary.

7. Place the probe so that neither end is in contact
with any metal surface of the dispenser.

If the voltage is present as described, re-install the
probe. The liquid level control circuitry is operating
properly.
If the voltage is not present as described, check the
pink probe wire and green tank wire for continuity and
overflow protection switch.

Location:
The Control Board is located behind the lower front
access cover mounted on the component bracket.

Test Procedure:
Liquid Level Control Circuitry:

1. Disconnect the dispenser from the power source.

2. With a voltmeter check the voltage across pins 4
& 5 of the J5 connector on the wiring harness.
Connect the dispenser to the power source. The
indication must be 24 volts ac.

3. Disconnect the dispenser 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 dispenser wiring harness back
to the transformer.

4. With a voltmeter check the voltage across pins 15
& 16 of the J4 connector on the wiring harness.
Connect the dispenser to the power source. The
indication must be:

a) 120 volts ac for two wire 120 volt models
b) 120 volts ac for three wire 120/208 volt models

or three wire 120/240 volt models

c) 240 volts ac for two wire 240 volt models.
d) 230 volts ac for two wire 230 volt models.

5. Disconnect the dispenser from the power source.

8. Check that the “Rinse/Run” switch is in the “Run”
position.

9. With a voltmeter check the voltage across the red
(+) terminal and the black (-) terminal of the auger
motor. Connect the dispenser to the power source.
Press the appropriate dispense switch. After a
delay of about .6 seconds, the indication must be
between +4.0 and +24.5 volts dc.

If the voltage is present as described, the hopper motor
control circuitry is operating properly.
If the voltage is not present as described, replace the
control circuit board.

20

42032 060109

SERVICE (cont.)

CONTROL BOARD (cont.)

Removal and Replacement:

1. Disconnect the three plugs on the main wiring har­ness from the connectors on the control board.

2. Remove the four #6-32 keps nuts securing the
control board to the component bracket.

3. Remove control board and discard.

4. Install new control board on the component bracket
using four #6-32 keps nuts.

5. Reconnect the three plugs on the main harness to
the connectors on the control board.

FIG. 14 CONTROL BOARD CONNECTORS

21

42032 060109

SERVICE (cont.)

PROGRAMMING TOUCHPAD

6. Remove any excess adhesive from the door sur­face.

7. Remove the backing from the new touchpad.

8. Feed the seven pin harness through the openning
and apply the new touchpad to the door.

9. Connect the touchpad harness to the display
board.

10. Install the lower door panel using the four #8-32
screws

STOP

Digital Beverage Control

FIG. 15 PROGRAMMING TOUCHPAD

P1680

Location:
The Touchpad is located on the front of the door
below the display panel.

Test Procedure:
Enter Programming and Test Switches.

Removal and Replacement:

1. Disconnect the dispenser from the power source.

2. Open the dispenser door.

3. Remove the four #8-32 screws securing the lower
door panel and remove the panel.

4. Disconnect the touchpad harness from the display
board.

5. Carefully peel the touchpad from the front of the
door.

PORTION CONTROL

PUSH BUTTON

TOUCHPAD

J9-7

DISPLAY BOARD

J9-1

FIG. 16 TOUCHPAD CONNECTORS

P1680

22

42032 060109

SERVICE (cont.)

Calibration

Diagnostics

PROGRAMMING - CALIBRATION & DIAGNOSTICS

TANK TEMP XXX°

(-) EXIT (+)

READY TEMP XXX°

(-) EXIT (+)

STRENGTH ADJ. ?

EXIT YES

ENTER PASSWORD

(-) XXXX (+)

Adjust tank

temperature

Adjust minimum

tank ready

temperature for

lockout

ENTER ASSET # ?

EXIT YES

ENABLE SERVICE ?

NO EXIT YES

ENABLE EnergySavr ?

NO EXIT YES

DIAGNOSTICS ?

EXIT YES

SELECT UNITS

ENG EXIT METRIC

CAL HOPPER 1 ?

NO YES

Goes to next station.

Continues after last station.

XX° CAL XX°

(-) Tank Temp (+)

235 REFILL 155

(-) EXIT (+)

TEST SWITCHES ?

Use Switch To Test

TEST HEATER ?

EXIT YES

TEST REFILL ?

EXIT YES

TEST HOT WATER ?

EXIT YES

TEST AUGERS ?

DISPENSE TO TEST

CALIBRATION ?

EXIT YES

(A)

LOCKS/DISABLES ?

EXIT YES

AUDIBLE ALARM ?

NO EXIT YES

DISABLE MESSAGES ?
NO EXIT YES

To

Calibration

(B)

DISPLAY USAGE ?

EXIT YES

FACTORY DEFAULTS

NO YES

FINISHED, returns

to main screen

To

Diagnostics

CAL WATER 1 ?

PRESS DISPENSE

TEST DISPENSE HEAD?

DISPENSE TO TEST

ENTER VOLUME 1

(-) XX.X oz (+)

Returns to B

CAL POWDER 1 ?

PRESS DISPENSE

ENTER WEIGHT 1

(-) XX.X gm (+)

Goes to next station.

Continues after last station.

ENABLE ADS ?

NO EXIT YES

23

Auger Delay

(-) .XX sec (+)

Returns to A

42032 060109

SERVICE (cont.)

MEMORY CLOCK BOARD (Early Models) (IMIX-3, 4 & 5 only)

Removal and Replacement:

1. Disconnect the wiring harness from the memory

2. Remove the two #6-32 screws securing the mem-

3. Remove the two spacers from the memory

4. Remove and discard memory board.

5. Install the two spacers to the new memory

6. Install new memory board using two #6-32 screws

P3250.25

FIG. 17 MEMORY CLOCK BOARD

Location:
The Memory Clock Control Board is located on the

back side of the component bracket assembly.

7. Refer to Fig. 18 when reconnecting the wires.

board.

ory board to the component bracket.

board.

board.

to secure board to the component bracket.

Test Procedure:

1. Disconnect the dispenser from the power source.

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.

J1-1

GRN

WHI

MEMORY

BOARD

+5VDC

J1-5

FIG. 18 MEMORY CLOCK BOARD CONNECTORS

RED

BLK

24

42032 060109

SERVICE (cont.)

TEMPERATURE PROBE

Removal and Replacement:

1. Disconnect the dispenser from the power source.

2. Remove the top rear cover.

3. Disconnct the two pin connector from the dis­penser main wiring harness.

4. Remove the temperature probe by firmly pulling­up on the tube at the tank lid. This will disengage
the grommet from the tank lid.

5. Slide a new grommet on to the new temperature
probe.

6. Insert the temperature probe through the hole
in the tank lid and press the grommet firmly and
evenly so that the groove in the grommet fits into
the tank lid.

7. Reconnect the two pin connector to the dispenser
main wiring harness.

FIG. 19 TEMPERATURE PROBE

P1665

Location:
The temperature probe is located on the top of the
tank assembly.

Test Procedure:

1. Disconnect the dispenser from the power source.

2. Remove the top rear cover.

3. With a voltmeter, back probe the connector from
the temperature probe.

4. Connect the dispenser to the power source.

5. See the chart for voltage readings.

6. For continuity check, disconnect the dispenser
from the power source.

7. Disconnct the two pin connector from the dis­penser main wiring harness.

8. With an ohmmeter, check for continuity across
the pins for the black and white wires.

9. See the chart for resistance readings.

10. Verify wiring to probe.

11. If readings are not present as described, replace
the temperature probe.

NOTE: Some meters have difficulty measuring a sen­sor either rapidly rising or falling in temperature.

BLK pin 1
WHI pin 2

FIG. 20 TEMPERATURE PROBE

TEMP RESISTANCE VOLTAGE

READY

 190°F 891Ω 1.5VDC
 87.0°C

ROOM

 70°F 11.9kΩ 4.5VDC
 21.1°C

25

42032 060109

SERVICE (cont.)

DISPENSE SWITCHES (IMIX-3S+ & 5S+ only)

P3645

FIG.21 DISPENSE SWITCHES

Location:
The dispense switches are located on the lower

outside of the dispenser door.
Test Procedure:

1. Disconnect the dispenser from the power source.

2. Open the dispenser door and remove the bottom
door cover.

3. Disconnect the wires from the door interconnect wir­ing harness to the dispense switch to be tested.

4. Check for voltage across each pair of wires as
indicated in Fig. 26. Connect the dispenser to the
power supply. The indication must be:

a) 120 volts ac for two wire 120 volt models, 120/208

volt and 120/240 volt models.

b) 240 volts ac for two wire 240 volt models.
c) 230 volts ac for two wire 230 volt models.

5. Disconnect the dispenser from the power source.

7. Check for continuity across the terminals (top right
to top left; bottom right to bottom left) of the dis­pense switch with the switch in the “ON” position.
Continuity must not be present when the switch is
in the “OFF” (released) position.

If continuity is present as described, reconnect the
connector to the door interconnect wiring harness, the
switch is operating properly.
If continuity is not present as described, replace the
switch.

Removal and Replacement:

1. Open the dispenser door.

2. Remove the bottom door cover.

3. Disconnect the wires on the dispense switch to be
removed from the door interconnect wiring har­ness.

4. Compress the clips inside the door on the dispense
switch and gently push the switch through the
opening.

5. Push new switch into the opening and spread the
clips to hold the switch in the door.

6. Reconnect the wires to the dispense switch from
door interconnect wiring harness.

7. Reinstall the bottom door bottom.

8. Refer to Fig. 22 when reinstalling wires.

BLK
ORN

BLK
RED

If voltage is present as described, proceed to #6.
If voltage is not present as described, refer to the Wiring
Diagrams and check the dispenser wiring harness.

6. With a voltmeter, check the voltage across the
blue/black (+) and orange (-) wires for the right
dispense switch, black/white (+) and orange (-)
wires for the center dispense switch, or blue/white
(+) and orange (-) for the left dispense switch from
the door interconnect wiring harness. Connect the
dispenser to the power source. The indication must
be +5 volts dc.

If voltage is present as described, proceed to #7.
If voltage is not present as described, refer to the Wiring
Diagrams and check the dispenser wiring harness.

26

BLK
TAN

Station #3

Station #2

BLK
GRN

Station #1

BLK
YEL

Station #5

Station #4

FIG. 22 DISPENSE SWITCH TERMINALS

P1449

42032 060109

SERVICE (cont.)

DISPENSE SWITCHES

P3243

FIG.23 DISPENSE SWITCHES

Location:
The dispense buttons are located on the lower

outside of the dispenser door and actuate switches on
the dispense switch board located on the inside of the
door.

PUSH BUTTON

PORTION CONTROL

P1449

FIG. 24 DISPENSE SWITCH BOARD

Test Procedure:
Enter Programming and Test Switches.

Removal and Replacement:

1. Disconnect the dispenser from the power source.

2. Open the dispenser door.

3. Remove the four #8-32 screws securing the lower

door panel and remove the panel.

4. Disconnect the five pin harness from the switch

board.

5. Remove the four #6 screws securing the switch

board to the door frame and discard the board.

6. Other parts of the switch assembly may be removed

if necessary.

7. Install the new switch board using the four #6

screws.

8. Connect the five pin harness to the switch board.

9. Install the lower door panel using the four #8-32

screws.

27

42032 060109

SERVICE (cont.)

EMI FILTER (230 Volt IMIX-3, 4 & 5 only)

P3250.25

FIG. 25 EMI FILTER

Location:
The EMI Filter is located on the rear of the dispenser

base near the Terminal Block on IMIX-3.
The EMI Filter is located on the rear of the back side

of the component bracket assembly on IMIX-4 & 5.

Removal and Replacement:

1. Disconnect the wires from the EMI Filter.

2. Remove the two #8-32 screws and nuts securing
the EMI Filter.

3. Remove and discard EMI Filter.

4. Install new EMI Filter using two #8-32 screws and
nuts to secure EMI Filter to its former location.

5. Refer to Fig. 26 when reconnecting the wires.

118.0kΩ-118.5kΩ

Across either pair

Test Procedure:

1. Disconnect the dispenser from the power source.

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

3. Check for resistance between the two black leads
on the EMI Filter.

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

FIG. 26 EMI FILTER CONNECTORS

28

42032 060109

SERVICE (cont.)

VACUUM FAN

FIG. 27 FAN

Removal and Replacement:

1. Disconnect the vacuum hose from the fan.

2. Remove the two #8-32 locking screws securing the
fan to the dispenser housing base plate.

3. Disconnect the wires from the fan terminals and
discard the fan

4. Refer to Fig. 28 and connect the wires to the new
fan.

5. Install new fan using two #8-32 locking screws.

6. Reconnect the vacuum hose to the fan.

BLK from Main
WiringHarness

P1436

Location:
The fan is located inside the dispenser housing on
the right rear of the dispenser base plate.

Test Procedures:

1. Disconnect the dispenser from the power source.

2. Disconnect the black and white wires from the
fan terminals.

3. With a voltmeter, check the voltage across the
black and white wires. Connect the dispenser to
the power source. The indication must be:

a) 120 volts ac for two wire 120 volt, three wire

120/208 volt and 120/240 volt models.

b) 240 volts ac for two wire 240 volt models.
c) 230 volts ac for two wire 230 volt models.

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

WHI from Main Wiring Harness

FIG. 28 FAN TERMINALS

P1507

29

42032 060109

SERVICE (cont.)

FROTHER AND WHIPPER MOTOR

P1641.40

FIG. 29 FROTHER AND WHIPPER MOTOR

Location:
The frothers are located behind the dispenser door,
mounted on the whipper motor shaft inside the whipper
chamber.
The whipper motors are located on the back side
of the whipper motor mounting panel.

Test Procedure:

1. Check that the rinse/run switch is in the rinse (up)
position.

2. Disconnect the dispenser from the power source.

3. Disconnect both wires from the black leads on the
motor to be checked.

4. Press and hold the appropriate dispense switch
and, with a voltmeter, check the voltage across the
disconnected harness. Connect the dispenser to the
power source. The reading must be:

a) 120 volts ac for two wire 120 volt models, three

wire 120/208 volt and 120/240 volt models.

b) 240 volts ac for two wire 240 volt models.
c) 230 volts ac for two wire 230 volt models.

5. Disconnect the dispenser from the power source.

11 12 13

1 2

10

9 8 7 6 5 4 3

P1630.35

FIG. 30 MIXING/WHIPPER CHAMBER

COMPONENTS

1. Steam Collector

2. Mixing Chamber

3. Dispense Tip

4. Whipper Chamber

5. O-Ring

6. Frother

8. Receptacle w/Seal

9. Slinger

10. Motor Assy.

11. Fan

12. Vacuum Hose

13. Baffle

7. Nut

Removal, Cleaning & Replacement (Refer to Fig. 30):

1. Disconnect the dispenser from power.

2. Open the dispenser door and turn elbows up.

3. Remove the steam collectors (1) by pulling forward
and at the same time twisting clockwise.

4. Pull the mixing chamber (2) out of the whipper
chamber (4).

5. Remove dispense tip (3) and twist the whipper
chamber (4) clockwise and pull it off the whipper
chamber receptacle (8).

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

30

42032 060109

SERVICE (cont.)

FROTHER AND WHIPPER MOTOR (cont.)

6. Pull the frother (6) off the motor shaft. Notice the
flat side on the shaft and the matching flat inside
the frother. It is important that these two flats are
lined up when reassembling.

7. Slip the o-ring (5) off the whipper chamber recep­tacle (8).

8. Remove nearest side panel and disconnect whipper
motor wires.

9. Remove the two nuts (7) securing whipper chamber
receptacle (8) and whipper motor (10) to the front
panel.

NOTE: To remove the recptacle only, rotate clockwise

until the receptacle clears the nuts (7) and slides
off of the motor shaft.

10. Slide the receptacle with seal off of the motor
shaft.

11. Slide the slinger (9) off of the motor shaft.

12. Remove motor and discard.

13. Install new motor (10) on rear of front panel and
secure with two nuts (7) and connect black leads
on the motor to the main wiring harness. Refer to
Fig. 27 when reconnecting wires

14. Slide slinger (9) onto the motor shaft flush against
the front panel.

15. Wash remaining components in a mild solution of
dish detergent using a bristle brush.

16. Rinse thoroughly and allow to dry before reinstalling
in the dispenser.

17. Slide whipper chamber receptacle with seal (8) and
o-ring (5) on to the motor shaft.

18 Rotate the receptacle with seal (8) counterclockwise

until it snaps into place on the motor mounting nuts
(7).

19. Push frother (6) onto the motor shaft, making sure
the flat in the frother (6) lines up with the flat on
the motor shaft.

20. Install whipper chamber (4) on the whipper chamber
receptacle (8) by twisting counterclockwise until
the tabs on the whipper chamber (4) lock with the
tabs on the whipper chamber receptacle (8). Be
sure dispense port is pointing down.

21. Install dispense tip (3) into the bottom of the whip­per chamber (4).

22. Slip the mixing chamber (2) onto the mixing chamber
water inlet tube far enough so the mixing chamber
(2) will seat inside the whipper chamber (4).

23. Install the steam collector (1) onto the mixing cham­ber (2) by pushing down and toward the dispenser
while twisting until the flange on the steam collector
lines up with the slot in the front panel.

24. Install hopper assembly in the dispenser by slid­ing hopper assembly on the hopper support panel
until the slot in the bottom rear of the hopper seats
against the shoulder screw in the hopper support
panel.

25. Reinstall side panel.

26. Reconnect to power and test.

BLK to Main Harness
BLK to Main Harness

FIG.31 WHIPPER MOTOR TERMINALS

P1451.40

31

42032 060109

SERVICE (cont.)

LAMP AND LAMP HOLDER

Removal and Replacement:

1. Disconnect the dispenser from the power source.

2. Remove the outside window and display graphic.

3. Remove the two #4-40 screws securing the inside
window to the door and remove window.

4. Pull the lamp upwards and remove from the lamp
holders.

5. Remove lamp from lamp holders.

6. Remove the two lower screws attaching the lamp
holder bracket and remove the bracket.

7. Disconnect the lamp holder from the lamp panel.

8. Disconnect the wiring harness from the lamp holder
to be replaced and discard.

9. Connect the wiring harness to the new lamp holder
and snap the holder into place on the lamp panel.

10. Install the lamp holder bracket using screws previ­ously removed.

11. Install the lamp by pressing into the lamp holder.

12. Install inside window using two #4-40 screws.

13. Install the graphic display and outside window.

FIG. 32 LAMPS & HOLDERS

Location:
The lamps and lamp holders are located on the

front of the upper panel behind the display panel.

Test Procedure:

1. Disconnect the dispenser from the power source.

2. Remove the outside window and display graphic.

3. Remove the two #4-40 screws securing the inside
window to the door and remove window.

3. Pull the lamp upwards and remove from the lamp
holders.

4. Remove lamp from lamp holders.

5. Remove the two lower screws attaching the lamp
holder bracket and remove the bracket.

6. Check for continuity on each lead of the lamp hold­ers.

LAMP REPLACEMENT (Refer to Fig. 33)

1. Disconnect the dispenser from the power source.

2. Remove the outside window and display graphic.

3. Remove the two #4-40 screws securing the inside
window to the door and remove window.

3. Pull the lamp upwards and remove from the lamp
holders.

4. Install the lamp by pressing into the lamp holder.

5. Install inside window using two #4-40 screws.

6. Install the graphic display and outside window.

If continuity is present as described, lamp holders are
operating properly.
If continuity is not present as described replace the
lamp holder.

32

FIG. 33 LAMPS & HOLDERS

42032 060109

SERVICE (cont.)

LED LIGHTED DOORS

FIG. 34 LED LIGHTS

IMIX-3 Shown

If voltage is present as described, the LED board is
faulty.
If voltage is not present as described, retrace the wiring
circuit to find the fault.

5. Check for continuity across the terminals on the

leads and the LED harness.

If continuity is present as described, the lamp is op­erating properly.
If continuity is not present as described, replace the
lamp.

Removal and Replacement:

1. Disconnect power from the dispenser.

2. Remove the outside window and display graphic.

3. Remove the two #4-40 screws securing the inside

window to the door and remove window.

4. Remove the LED circuit board assembly from the

door panel.

5. Replace the LED circuit board assembly by exposing

the adhesive backing.

Location:

The LED hopper lights are located on the front of

the upper panel behind the display panel.

Test Procedures:

1. Disconnect power from the dispenser.

2. Disconnect the black and red leads from the LEDs.

3. Check the voltage across the two leads with a
voltmeter. Reconnect power to the dispenser. The
indication must be approximately 12 volts ac.

4. Disconnect power from the dispenser.

IMIX-3 Shown

FIG. 35 LED LIGHTS

33

42032 072513

SERVICE (cont.)

LIMIT THERMOSTAT

If continuity is present as described, the limit thermostat
is operating properly.
If continuity is not present as described, replace the
limit thermostat.

Removal and Replacement:

1. Remove all wires from the limit thermostat termi­nals.

2. Carefully slide the limit thermostat out from under
the retaining clip and remove the limit thermo­stat.

3. Carefully slide the new limit thermostat into the
retaining clip.

4. Refer to schematic wiring diagrams when recon­necting the wires.

FIG. 36 LIMIT THERMOSTAT

P1637

Location:
The limit thermostat is located in the center of the

tank lid.

Test Procedures:

1. Disconnect the dispenser from the power source.

2. Disconnect both black wires from the limit thermo­stat.

3. Check for continuity across the limit thermostat
terminals.

P1800

FIG. 37 LIMIT THERMOSTAT TERMINALS

34

42032 060109

SERVICE (cont.)

ON/OFF/NIGHT SWITCH

P1637

FIG. 38 ON/OFF/NIGHT SWITCH

Location:
The ON/OFF/NIGHT Switch is located inside the

dispenser door on the lower right side of the whipper
panel.

Removal and Replacement:

1. Remove all wires from the switch terminals.

2. Compress the clipson the switch and gently push
the switch through the opening in the panel.

3. Push the new switch into the opening of the panel
so that the clips snap it securely into place.

4. Refer to Fig. 39 when reconnecting the wires.

Test Procedures:

1. Disconnect the dispenser from the power source.

2. Disconnect the wires from the switch terminals.

3. Check for continuity between the center terminal
and upper terminal with switch in the NIGHT (lower)
position. Check for continuity between the center
terminal and the lower terminal with the switch
in the ON (upper) position. Continuity must not
be present when the switch is in the OFF (center)
position.

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

P1800

FIG. 39 ON/OFF/NIGHT

SWITCH TERMINALS

35

42032 060109

SERVICE (cont.)

NORMAL/PROGRAM/RINSE SWITCH

P1637

FIG. 40 NORMAL/PROGRAM/RINSE SWITCH

Location:
The NORMAL/PROGRAM/RINSE Switch is located

inside the dispenser door on the upper right side of the
whipper panel.

Removal and Replacement:

1. Remove all wires from the switch terminals.

2. Compress the clipson the switch and gently push
the switch through the opening in the panel.

3. Push the new switch into the opening of the panel
so that the clips snap it securely into place.

4. Refer to Fig. 41 when reconnecting the wires.

Test Procedures:

1. Disconnect the dispenser from the power source.

2. Disconnect the wires from the switch terminals.

3. Check for continuity between the center terminal
and upper terminal with switch in the RINSE (lower)
position. Check for continuity between the center
terminal and the lower terminal with the switch in
the NORMAL (upper) position. Continuity must not
be present when the switch is in the PROGRAM
(center) position.

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

P1800

FIG. 41 NORMAL/PROGRAM/RINSE

SWITCH TERMINALS

36

42032 060109

SERVICE (cont.)

OVERFLOW PROTECTION SWITCH

FIG. 42 OVERFLOW PROTECTION SWITCH

Removal and Replacement:

1. Disconnect the red leads from the overflow protec­tion switch from the black wire and the blue wire
from the main harness.

2. Remove the nut beneath the copper overflow
cup.

3. Remove the entire switch assembly from the cup.

4. Place the new switch assembly into the cup, wires
first. Make sure that a gasket is in place around the
threaded switch stem.

NOTE - The magnets must be at the top of float and
there must be NO adjusting washers installed for the
overflow protection switch to operate properly.

5. Install the nut beneath the copper overflow cup. Be
sure not to overtighten.

6. Refer to schematic wiring diagrams when recon­necting wires.

P1637

Location:
The overflow protection switch is located inside the

copper overflow cup on the left side of the tank.

Test Procedures:

1. Disconnect the dispenser from the power source.

2. Remove the wire nuts connecting the red wires
from the overflow protection switch to the black
wire and blue wire from the main harness.

3. Check for continuity across the safety overflow
switch red wires only until the plastic float is raised
and check that continuity returns when the plastic
float is again lowered.

If continuity is present as described, reconnect the
red wires to the black wire and the blue wire from the
main harness.
If continuity is not present as described, replace the
overflow protection switch.

FIG. 43 OVERFLOW PROTECTION

SWITCH LEADS

P1212

37

42032 060109

SERVICE (cont.)

SOLENOID VALVE (INLET)

P1445.40

FIG. 44 INLET SOLENOID VALVE

Location:
The inlet solenoid is located inside on the rear of

the dispenser base.

If the sound is heard as described and water will not
pass through the solenoid valve, there may be a block­age in the water line before the solenoid valve or, the
solenoid valve may require inspection for wear, and
removal of waterborne particles.
If the sound is not heard as described, replace the
solenoid valve.

Removal and Replacement:

1. Remove the two wires from the solenoid valve.

2. Turn off the water supply to the dispenser.

3. Disconnect the water lines to and from the solenoid
valve.

4. Remove the two #8-32 screws securing the sole­noid to the dispenser base. Remove solenoid.

5. Install new solenoid valve on the dispenser base
and secure with the two #8-32 screws.

6. Securely fasten the water lines to and from the
solenoid valve.

7. Refer to Schematic Wiring Diagrams when recon­necting the wires.

Test Procedures:

1. Disconnect the dispenser from the power
source.

2. Disconnect the two wires from the solenoid
valve.

3. Check for continuity across the solenoid valve coil
terminals.

If continuity is present as described, reconnect the two
wires to the solenoid.
If continuity is not present as described, replace the
solenoid valve.

4. Check the solenoid valve for coil action. Connect
the dispenser to the power source. Listen carefully
in the vicinity of the solenoid valve for a “clicking”
sound as the coil magnet attracts.

5. Disconnect the dispenser from the power source.

Early Models

120V1.2kΩ

230V3.84kΩ

Late Models

120V622Ω

230V1555Ω

P1217

FIG. 45 INLET SOLENOID VALVE TERMINALS

38

42032 060109

SERVICE (cont.)

SOLENOID VALVES (DISPENSE)

P1637.40

FIG. 46 DISPENSE SOLENOID VALVES

Location:
The dispense solenoids are located on the side of

the tank.

Test Procedures:

1. Disconnect the dispenser from the power source.

2. Disconnect the two wires from the solenoid valve.

With the “RUN/RINSE” switch in the “RINSE” (up­per) position press the appropriate dispense switch
on front of the door.

3. With a voltmeter, check the voltage across the two

wires. Connect the dispenser to the power source.
The indication must be:

a) 120 volts ac for two wire 120 volt models, three

wire 120/208 volt, and 120/240 volt models.
b) 240 volts ac for two wire 240 volt models.
c) 230 volts ac for two wire 230 volt models.

4. Disconnect the dispenser from the power source,
If voltage is present as described, proceed to #5
If voltage is not present as described, refer to Wiring
Diagrams and check dispenser wiring harness.

5. Check for continuity across the solenoid valve coil

terminals.

6. Check the solenoid valve for coil action. Connect the
dispenser to the power source. With “RUN/RINSE”
switch in the “RINSE” (upper) position press the
appropriate dispense switch and listen carefully in
the vicinity of the solenoid valve for a “clicking”
sound as the coil magnet attracts.

7. Disconnect the dispenser from the power source.

If the sound is heard as described and water will not
pass through the solenoid valve, there may be a block­age in the tank water outlet before the solenoid valve
or, the solenoid valve may require inspection for wear,
and removal of waterborne particles.

If the sound is not heard as described, replace the
solenoid valve.

Removal and Replacement:

1. Remove the two wires from the solenoid valve.

2. Turn off the water supply to the dispenser.

3. Drain enough water from the tank (approximately

1.0 gallon) so the water level is below the dispense
valve mounting hole.

4. Disconnect the water line from the solenoid
valve.

5. Remove the #10-32 screw securing the solenoid
valve to side of the tank. Remove solenoid valve.

6. Using the #10-32 screw install new solenoid valve
on side of the tank

7. Push the water line onto the tube on bottom of
solenoid valve.

8. Refer to schematic wiring diagrams when recon­necting the wires.

Dispense Station

WHI to Control Board

#1 BRN/BLK
Dispense Station
#2 RED
Dispense Station
#3 ORN
Dispense Station
#4 YEL
Dispense Station
#5 BLU

If continuity is present as described, reconnect the two
wires to the solenoid.

If continuity is not present as described, replace the
solenoid valve.

39

FIG. 47 DISPENSE SOLENOID VALVE

TERMINALS

P1645

42032 060109

SERVICE (cont.)

TANK HEATER

P1637.40

FIG. 48 TANK HEATER

Location:
The tank heater is located inside the tank and se-

cured to the tank lid.

Test Procedure:

1. Disconnect the dispenser from the power source.

2. With a voltmeter, check the voltage across the
black and white wires 120 volt or 240 volt models
or black and red wires for 120/208 volt models or
120/240 volt models. Connect the dispenser to the
power source. The indication must be:

a) 120 volts ac for two wire 120 volt models;
b) 208 volts ac for three wire 120/208 volt mod-

els.

c) 240 volts ac for three wire 120/240 volt models

and two wire 240 volt models.

d) 230 volts ac for two wire 230 volt models.

3. Disconnect the dispenser from the power source

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

4. Disconnect the black wire and the white or red wire
from the tank heater terminals.

5. Check for continuity across the tank heater termi­nals.

If continuity is present as described, reconnect the
wires, the tank heater is operating properly.
If continuity is not present as described, replace the
tank heater.

NOTE - If the tank heater remains unable to heat, remove
and inspect heater for cracks in the sheath.

Removal and Replacement:

1. Shut off water supply to the dispenser.

2. Disconnect the water supply tube on the tank lid.

3. Disconnect the black wires on the limit thermo­stat.

4. Disconnect the black wire and the white or red wire
from the tank heater terminals.

5. Disconnect the pink wire from the liquid level
probe.

6. Disconnect the green wire from the tank.

7. Remove the thermostat capillary bulb/temperature
probe by firmly pulling up on the capillary at the
tank lid. This will disengage the grommet from the
tank lid.

8. Remove the ten #8-32 nuts securing the tank lid to
the tank.

9. Remove tank lid with limit thermostat, liquid level
probe and tank heater as an assembly.

10. Remove the two hex nuts securing the tank heater
to the tank lid. Remove tank heater with gaskets
and discard.

11. Install new tank heater with gaskets on the tank lid
and secure with two hex nuts.

12. Install tank lid with limit thermostat, liquid level
probe and tank heater on the tank and secure with
ten #8-32 hex nuts.

13. Connect water inlet line to the tank lid.

14. Reconnect the black wires to limit thermostat, the
pink wire to the liquid level probe and the green
wire to the tank. Refer to the limit thermostat and
the liquid level board and probe sections in this
manual when reconnecting wires.

15. Refer to Fig. 49 when reconnecting the wires to the
tank heater.

BLK Wire from
Main Harness

WHI or RED Wire
from Main Harness

P1637.40

FIG. 49 TANK HEATER TERMINALS

40

42032 060109

SERVICE (cont.)

TRANSFORMER

P3250.25

FIG. 50 TRANSFORMER

Location:
The transformer is mounted on the side of the tank
mounting bracket for models 3,4 & 5. The transformer
is located behind the lower front access cover, mounted
on the rear side of the component bracket for models
3S,3S+,5S & 5S+.

Test Procedure:

1. Disconnect the dispenser from the power source.

2. Disconnect the four pin plug from the main harness
from the four pin connector on the transformer.

3 Check the voltage across black wire pin 1 and the

white wire pin 2 on the plug from the main har­ness. Connect the dispenser to power source. The
indication must be:

a) 120 volts ac for two wire 120 volt models, three

wire 120/208 volt and three wire 120/240 volt
models.

b) 240 volts ac for two wire 240 volt models.
c) 230 volts ac for two wire 230 volt models.

4. Disconnect the dispenser from the power source.

If voltage is present as described the transformer is
operating properly.
If voltage is not present as described, replace the
transformer.

Removal and Replacement:

1. Loosen the two #8-32 screws securing the com­ponent bracket to the dispenser housing base.

2. Pull component bracket out the front of the dispenser
far enough so the transformer connector can be
disconnected from the main wiring harness.

3 Disconnect the transformer four pin connector from

the four pin plug on the main wiring harness.

4. Remove the two #6-32 keps nuts securing the trans­former to the rear of the component bracket.

5. Remove and discard the transformer.

6. Install new transformer on the rear of the component
bracket and secure with two #6-32 keps nuts.

7. Connect the four pin connector on the transformer
to four pin plug on the main wiring harness.

8. Place the component bracket into position and
tighten the two #8-32 screws.

WHI/GRN - T8

WHI/BLK - T12

If voltage is present as described reconnect the plug
and the connector and proceed to #5.
If voltage is not present as described, refer to the Wiring
Diagrams and check the main wiring harness.

5. Check the voltage between J3-5 and J3-6 on the
six pin connector at the control board. Connect the
dispenser to the power source. The indication must
be 24 volts ac.

41

WHI - 120V T2, 240V T6

BLK - TI

P1647

FIG. 51 TRANSFORMER TERMINALS

42032 060109

SERVICE (cont.)

TRIAC

FIG. 52 TRIAC

Location:
The triac is mounted on the right side of the tank
mounting bracket for models IMIX-3,4 & 5.

Removal and Replacement:

1. Disconnect the dispenser from the power source.

2. Disconnect the two pin connector from the dispenser
main wiring harness.

3. Disconnect the BLU wire from ther limit thermo­stat.

4. Disconnect the BLK wire from the terminal block.

5. Remove the two #6-32 screws attaching the heat
sink to the tank mounting bracket and remove the
heat sink assembly.

6. Remove the #6-32 screw and lockwasher attaching
the triac to the heat sink.

7. Install the new triac to the heat sink using the #6-32
screw and lockwasher.

8. Install the heat sink to the tank mounting bracket
using the two #6-32 screws.

9. Refer to Schematic Wiring Diagrams for reconnect­ing the wires.

Test Procedure:

1. With the heater (load) connected and the triac is
turned on, the voltage between the gate (TAN wire)
and either of the other two terminals is less than 3
volts AC.

TAN to Main Harness
BLK to Terminal Block
BLU to Limit Thermostat

FIG. 53 TRIAC TERMINALS

42

42032 060109

INPUT/OUTPUT CHART

for IMIX-3,4,5

iMIX-3/4/5 I/O 37104.####

PinApplication IMIX Type Values
J1-1 N/AN/A N/AN/A
J1-2 Heater Output 120 VACTriac signal
J1-3 Safety in Input Float switch IMIX and ICED
J1-4 Neutral/L2 Input N or 120VAC Self explanatory
J1-5 L1 Input 120 VACSelf explanatory
J1-6 Light Output 120 VACTurns on Ballast
J1-7 Hot WaterOutput 120 VACSelf explanatory
J1-8 Inlet Output 120 VACInlet activated with refill circuit

J2-1 TransformerOutput 120 VACSelf explanatory
J2-2 TransformerOutput 0 or 120VAC Self explanatory
J2-3 N/AN/A N/AN/A
J2-4 TransformerInput 24 VACSupplies power for board operation
J2-5 TransformerInput 24 VACSupplies power for board operation

J3-1 Auger 1Output 0 to 24 VDCAdjustable to change dispense rate
J3-2 RPM sensor Input Signal Hall Effect
J3-3 RPM sensor Output 5 VDC +Power supply to Hall Effect
J3-4 RPM sensor Output NegativePower supply to Hall Effect
J3-5 N/AN/A N/AN/A
J3-6 Dispense/Whipper Output N or L2 Neutral or second leg
J3-7 Dispense/Whipper Output L1 Leg 1 activated with dispense
J3-8 Low powder detect? ??
J3-9 Low powder detectOutput 5 VDC +Sensor power supply
J3-10 Low powder detect? ??
J3-11Ground Gnd DC ground Self explanatory
J3-12N/A N/AN/A N/A
J3-13N/A N/AN/A N/A
J3-14N/A N/AN/A N/A

J4-1 Auger 2Output 0 to 24 VDCAdjustable to change dispense rate

J4-2 RPM sensor Input Signal Hall Effect
J4-3 RPM sensor Output 5 VDC +Power supply to Hall Effect
J4-4 RPM sensor Output NegativePower supply to Hall Effect
J4-5 N/AN/A N/AN/A
J4-6 Dispense/Whipper Output N or L2 Nuetral or second leg
J4-7 Dispense/Whipper Output L1 Leg 1 activated with dispense
J4-8 Low powder detect? ??
J4-9 Low powder detectOutput 5 VDC +Sensor power supply
J4-10 Low powder detect? ??
J4-11Ground Gnd DC ground Self explanatory
J4-12N/A N/AN/A N/A
J4-13N/A N/AN/A N/A
J4-14N/A N/AN/A N/A

J5-1 Auger 3Output 0 to 24 VDCAdjustable to change dispense rate
J5-2 RPM sensor Input Signal Hall Effect
J5-3 RPM sensor Output 5 VDC +Power supply to Hall Effect
J5-4 RPM sensor Output NegativePower supply to Hall Effect
J5-5 N/AN/A N/AN/A
J5-6 Dispense/Whipper Output N or L2 Nuetral or second leg
J5-7 Dispense/Whipper Output L1 Leg 1 activated with dispense
J5-8 Low powder detect? ??
J5-9 Low powder detectOutput 5 VDC +Sensor power supply
J5-10 Low powder detect? ??
J5-11Ground Gnd DC ground Self explanatory
J5-12N/A N/AN/A N/A
J5-13N/A N/AN/A N/A
J5-14N/A N/AN/A N/A

43

42032 060109

J5-4 RPM sensor Output NegativePower supply to Hall Effect
J5-5 N/AN/A N/AN/A
J5-6 Dispense/Whipper Output N or L2 Nuetral or second leg
J5-7 Dispense/Whipper Output L1 Leg 1 activated with dispense
J5-8 Low powder detect? ??
J5-9 Low powder detectOutput 5 VDC +Sensor power supply
J5-10 Low powder detect? ??
J5-11Ground Gnd DC ground Self explanatory
J5-12N/A N/AN/A N/A
J5-13N/A N/AN/A N/A
J5-14N/A N/AN/A N/A

INPUT/OUTPUT CHART (Continued)
for IMIX-3,4,5

J6-1 Auger 4Output 0 to 24 VDCAdjustable to change dispense rate
J6-2 RPM sensor Input Signal Hall Effect
J6-3 RPM sensor Output 5 VDC +Power supply to Hall Effect
J6-4 RPM sensor Output NegativePower supply to Hall Effect
J6-5 N/AN/A N/AN/A
J6-6 Dispense/Whipper Output N or L2 Nuetral or second leg
J6-7 Dispense/Whipper Output L1 Leg 1 activated with dispense
J6-8 Low powder detect? ??
J6-9 Low powder detectOutput 5 VDC +Sensor power supply
J6-10 Low powder detect? ??
J6-11Ground Gnd DC ground Self explanatory
J6-12N/A N/AN/A N/A
J6-13N/A N/AN/A N/A
J6-14N/A N/AN/A N/A

J7-1 Auger 5Output 0 to 24 VDCAdjustable to change dispense rate
J7-2 RPM sensor Input Signal Hall Effect
J7-3 RPM sensor Output 5 VDC +Power supply to Hall Effect
J7-4 RPM sensor Output NegativePower supply to Hall Effect
J7-5 N/AN/A N/AN/A
J7-6 Dispense/Whipper Output N or L2 Nuetral or second leg
J7-7 Dispense/Whipper Output L1 Leg 1 activated with dispense
J7-8 Low powder detect? ??
J7-9 Low powder detectOutput 5 VDC +Sensor power supply
J7-10 Low powder detect? ??
J7-11Ground Gnd DC ground Self explanatory
J7-12N/A N/AN/A N/A
J7-13N/A N/AN/A N/A
J7-14N/A N/AN/A N/A

J8-1 Beeper Output 8 VDCSelf explanatory
J8-2 Beeper Output Ground Self explanatory

J9-1 External Novram External Novram External Novram
J9-2 External Novram External Novram External Novram
J9-3 External Novram External Novram External Novram
J9-4 External Novram External Novram External Novram
J9-5 External Novram External Novram External Novram

J10-1? Shorted to J10-13
J10-2?
J10-3?
J10-4?
J10-5?
J10-6?
J10-7?
J10-8?
J10-9?
J10-10 ?
J10-11 ?
J10-12 ?
J10-13 ?Shorted to J10-1

J11-1 Display boardOutput 8 VDC Display power supply
J11-2 Display board I/O Comm Communication
J11-3 Display boardGRND GRND GRND
J11-4 Display board I/O Comm Communication

44

42032 060109

J10-5?
J10-6?
J10-7?
J10-8?
J10-9?
J10-10 ?
J10-11 ?
J10-12 ?
J10-13 ?Shorted to J10-1

J11-1 Display boardOutput 8 VDC Display power supply
J11-2 Display board I/O Comm Communication
J11-3 Display boardGRND GRND GRND
J11-4 Display board I/O Comm Communication

INPUT/OUTPUT CHART (Continued)
for IMIX-3,4,5

J12-1Temp Sensor Input Varistor
J12-2N/A N/AN/A N/A
J12-3 Level Probe signal Low AC Monitors tank level
J12-4 Level Probe grnd Low AC Monitors tank level
J12-5Temp Sensor Input ?
J12-6N/A N/AN/A N/A
J12-7 Run Position Input ?Signals run position from rinse run switch
J12-8N/A N/AN/A N/A
J12-9N/A N/AN/A N/A
J12-10 N/AN/A N/AN/A
J12-11 N/AN/A N/AN/A
J12-12 N/AN/A N/AN/A
J12-13 Ground grnd grnd Ground for rinse/run and day night switches
J12-14 Rinse position Input ?Signals rinse position from rinse run switch
J12-15 On position Input ?Signal on from day night switch
J12-16 Off position Input ?Signal off from day night switch

J13-1 Program connector
J13-2 Program connector
J13-3 Program connector
J13-4 Program connector
J13-5 Program connector
J13-6 Program connector
J13-7 Program connector
J13-8 Program connector
J13-9 Program connector
J13-10 Program connector

45

42032 060109

SCHEMATIC WIRING DIAGRAM

L1

iMIX-3

GRN

N L2

BLK-16

BLK
BLK

BLK

RED/BLK

GRN/BLK

1

WHI/RED

WHI/GRN

LEFT LAMP

ASSY.

GRN/BLK

BLU/BLK

BLU/BLK

4

LAMP ASSY.

BLK RED/BLK

BLK

RED/WHI

1

WHI

RIGHT

120V : 24V AC

TRANSFORMER

BEEPER

BALLAST 1

BALLAST 2

RED/WHI

GRN/WHI

BLU/WHI

GRN

GRN/WHI

BLU/WHI

WHI

GRN

TRIAC

OVERFLOW

PROTECTION SW

RED RED

BLK

BLK

WHI WHI

WHI

WHI

GRN

4

MEMORY

BOARD

LIMIT

GRN
WHI

RED
BLK

BLK
WHI

YEL
YEL

RED
BLK

THERMOSTAT

TAN

J1-1

J10-1

J10-5

J10-10

J9-1

J9-5

J2-1

J2-5

J8-1

RED

WHI

BLU-16 BLK-16

BLK

BLK

GRN

BLK

CONTROL

CIRCUIT

BOARD

BLK

J1-5

GRY

J1-8

J3-1

J3-5

J3-10

J3-14

J4-1

J4-5

J4-10

J4-14

J5-1

J5-5

J5-10

HOT WATER

(OPTIONAL)

BRN/WHI
GRN
RED
BLK

BRN/BLK
WHI
TAN
WHI
BLK
GRN

WHI/RED
GRN
RED
BLK

RED
WHI
RED
WHI
BLK
GRN

WHI/ORN
GRN
RED
BLK

ORN
WHI
ORN
WHI
BLK
GRN

TANK HEATER

REFILL VALVE

SOL

RED-16 (3-WIRE MODELS)
WHI-16 (3-WIRE MODELS)

BLK

SOL

AUGER MOTOR
SPEED SENSOR

1

SOL

DISPENSE VALVE #1

1

HOPPER EMPTY
DETECT SENSOR

AUGER MOTOR
SPEED SENSOR

1

SOL

DISPENSE VALVE #2

1

HOPPER EMPTY
DETECT SENSOR

AUGER MOTOR
SPEED SENSOR

1

SOL

DISPENSE VALVE #3

1

HOPPER EMPTY
DETECT SENSOR

FAN

M

#1

#1

#2

#2

#3

#3

WHI

WHI

WHI

WHI

AUGER #1

M

WHIPPER #1

M

AUGER #2

M

WHIPPER #2

M

AUGER #3

M

WHIPPER #3

M

WHI
BLK

t

1

PROBE

GRN

GRN

RUN

PROGRAM

RINSE

ON

OFF

NIGHT

120 VOLTS AC - 2 WIRE

120/208-240 VOLTS AC - 3 WIRE

SINGLE PHASE, 60HZ

37478.0000D 01/05 ©2004 BUNN-O-MATIC CORPORATION

WHI

PNK
GRN

BLK

WHI/VIO

GRN
WHI/YEL
WHI/GRN
WHI/BLU

J12-1

J12-5

J12-10

J12-16

#1

46

J5-14

J11-1

J11-4

RED
ORN
BLU
WHI

J10-1

J10-4

J1-1 J1-5 J2-1 J2-5 J3-1 J3-5

BLU

YEL

ORN

BLK

RED

J1-1 J1-5 J2-1 J2-5 J3-1 J3-5

SWITCH

BOARD

TOUCHPAD

J9-7

DISPLAY BOARD

BLU

YEL

ORN

BLK

RED

SWITCH

BOARD

J9-1

BLU

YEL

SWITCH

BOARD

ORN

BLK

RED

42032 072513

SCHEMATIC WIRING DIAGRAM

L1

iMIX-3

GRN

N L2

BLK-16

BLK
BLK

BLK

RED

BLK

J3-1

RED

BLK

J1-3

BLK

1

YEL
YEL

120V : 24V AC

TRANSFORMER

BEEPER

TRIAC

OVERFLOW

PROTECTION SW

RED RED

BLK

J2-1

RED

J1-1

RED

BLK

RED

MEMORY

BOARD

LIMIT

THERMOSTAT

BLU-16 BLK-16

BLK

TAN

RED

WHI

J1-5

J1-1

GRN

J10-1

J10-5

J10-10

GRN

J9-1

WHI

CONTROL

CIRCUIT

BOARD

YEL
YEL

RED
BLK

BLK
WHI

YEL
YEL

RED
BLK

J9-5

J2-1

J2-5

J8-1

GRY

J1-8

J3-1

J3-5

J3-10

J3-14

J4-1

J4-5

J4-10

J4-14

J5-1

J5-5

J5-10

HOT WATER

(OPTIONAL)

BRN/WHI
GRN
RED
BLK

BRN/BLK
WHI
TAN
WHI
BLK
GRN

WHI/RED
GRN
RED
BLK

RED
WHI
RED
WHI
BLK
GRN

WHI/ORN
GRN
RED
BLK

ORN
WHI
ORN
WHI
BLK
GRN

TANK HEATER

REFILL VALVE

SOL

RED-16 (3-WIRE MODELS)
WHI-16 (3-WIRE MODELS)

BLK

SOL

AUGER MOTOR
SPEED SENSOR

1

SOL

DISPENSE VALVE #1

1

HOPPER EMPTY

DETECT SENSOR

AUGER MOTOR
SPEED SENSOR

1

SOL

DISPENSE VALVE #2

1

HOPPER EMPTY

DETECT SENSOR

AUGER MOTOR
SPEED SENSOR

1

SOL

DISPENSE VALVE #3

1

HOPPER EMPTY

DETECT SENSOR

FAN

WHI

M

WHI

WHI

WHI

AUGER #1

M

#1

WHIPPER #1

M

#1

AUGER #2

M

#2

WHIPPER #2

M

#2

AUGER #3

M

#3

WHIPPER #3

M

#3

WHI
BLK

t

1

PROBE

GRN

GRN

RUN

PROGRAM

RINSE

ON

OFF

NIGHT

120 VOLTS AC - 2 WIRE

120/208-240 VOLTS AC - 3 WIRE

SINGLE PHASE, 60HZ

37478.0010A 03/13 ©2013 BUNN-O-MATIC CORPORATION

WHI

PNK
GRN
BLK

WHI/VIO

GRN
WHI/YEL
WHI/GRN
WHI/BLU

J12-1

J12-5

J12-10

J12-16

47

#1

J5-14

TOUCHPAD

J11-1

J11-4

RED
ORN
BLU
WHI

J10-1

J10-4

J9-7

DISPLAY BOARD

J9-1

J1-1 J1-5 J2-1 J2-5 J3-1 J3-5

BLU

YEL

ORN

BLK

RED

BLU

YEL

ORN

BLK

RED

BLU

YEL

ORN

BLK

RED

J1-1 J1-5 J2-1 J2-5 J3-1 J3-5

SWITCH

BOARD

SWITCH

BOARD

SWITCH

BOARD

42032 072513

L1

BLK

BLK
BLK

BLK

RED/BLK

GRN/BLK

1

WHI/RED

WHI/GRN

LEFT LAMP

ASSY.

GRN/BLK

BLU/BLK

BLU/BLK

LAMP ASSY.

4

1

RIGHT

TRANSFORMER

WHI

EMI

FILTER

WHI

BLK

BLK RED/BLK

BALLAST 1

BLK

BALLAST 2

RED/WHI

GRN/WHI

BLU/WHI

GRN

RED/WHI

GRN/WHI

BLU/WHI

WHI

WHI

GRN

240V : 24V AC

BEEPER

SCHEMATIC WIRING DIAGRAM

TRIAC

OVERFLOW

PROTECTION SW

RED RED

BLK

BLK

WHI WHI

WHI

WHI

GRN

4

MEMORY

BOARD

iMIX-3A

LIMIT

GRN
WHI

RED
BLK

BLK
WHI

YEL
YEL

RED
BLK

THERMOSTAT

TAN

J1-1

J10-1

J10-5

J10-10

J9-1

J9-5

J2-1

J2-5

J8-1

RED

WHI

BLK-16 BLK-16

BLK

BLK

GRN

BLK

CONTROL

CIRCUIT

BOARD

BLK

J1-5

THERMAL

SAFETY FUSE

GRY

J3-1

J1-8

J3-5

J3-10

J3-14

J4-1

J4-5

J4-10

J4-14

J5-1

J5-5

J5-10

TANK HEATER

HOT WATER

(OPTIONAL)

BRN/WHI
GRN
RED
BLK

BRN/BLK
WHI
TAN
WHI
BLK
GRN

WHI/RED
GRN
RED
BLK

RED
WHI
RED
WHI
BLK
GRN

WHI/ORN
GRN
RED
BLK

ORN
WHI
ORN
WHI
BLK
GRN

SOL

THERMAL

SAFETY FUSE

REFILL VALVE

SOL

SOL

SOL

SOL

GRN

FAN

BLK

M

AUGER MOTOR

SPEED SENSOR

1

#1

DISPENSE VALVE #1

1

HOPPER EMPTY

DETECT SENSOR

#1

AUGER MOTOR

SPEED SENSOR

1

#2

DISPENSE VALVE #2

1

HOPPER EMPTY
DETECT SENSOR

#2

AUGER MOTOR

SPEED SENSOR

1

#3

DISPENSE VALVE #3

1

HOPPER EMPTY
DETECT SENSOR

#3

L2

WHI

WHI

WHI

WHI

AUGER #1

M

WHIPPER #1

M

AUGER #2

M

WHIPPER #2

M

AUGER #3

M

WHIPPER #3

M

WHI
BLK

t

1

PROBE

GRN

GRN

RUN

PROGRAM

RINSE

ON

OFF

NIGHT

230 VOLTS AC &

240 VOLTS AC - 2 WIRE

SINGLE PHASE, 50HZ

37478.0001C 09/07 ©2004 BUNN-O-MATIC CORPORATION

WHI

PNK
GRN
BLK

WHI/VIO

GRN
WHI/YEL
WHI/GRN
WHI/BLU

J12-1

J12-5

J12-10

J12-16

48

#1

J5-14

J11-1

J11-4

RED
ORN
BLU
WHI

J10-1

J10-4

J1-1 J1-5 J2-1 J2-5 J3-1 J3-5

BLU

YEL

ORN

BLK

RED

J1-1 J1-5 J2-1 J2-5 J3-1 J3-5

SWITCH

BOARD

TOUCHPAD

J9-7

DISPLAY BOARD

BLU

YEL

ORN

BLK

RED

SWITCH

BOARD

J9-1

BLU

YEL

SWITCH

BOARD

ORN

BLK

RED

42032 072513

SCHEMATIC WIRING DIAGRAM

L1

iMIX-4/iMIX-5

GRN

NL2

BLK-16

BLK
BLK

BLK

RED/BLK

GRN/BLK

1

WHI/RED

WHI/GRN

LEFT LAMP

ASSY.

t

GRN/BLK

BLU/BLK

BLU/BLK

WHI/BLU

CENTER LAMP

WHI

BLK

4

1

ASSY.

BLKRED/BLK

BALLAST 1

BLK

BALLAST 2

BLK

BALLAST 3

RED/WHI

GRN/WHI

BLU/WHI

GRN

RED/WHI

GRN/WHI

BLU/WHI

WHI

WHI

WHI

GRN

RIGHT

LAMP ASSY.

120V : 24V AC

TRANSFORMER

BEEPER

1

PROBE

TOUCHPAD

TRIAC

OVERFLOW

PROTECTION SW

RED RED

BLK

BLK

BLK

WHI WHI

WHI

WHI

GRN

4

MEMORY

BOARD

GRN

GRN

GRN

GRN
WHI

RED
BLK

BLK
WHI

YEL
YEL

RED
BLK

THERMOSTAT

J1-1

J10-1

J10-5

J10-10

J9-1

J9-5

J2-1

J2-5

J8-1

J12-1

J12-5

J12-10

J12-16

BLK-16 BLK-16

BLK

BLK

BLK

USED ON

iMIX-4

MODELS

ONLY

WHI

PNK
GRN
BLK

RUN

WHI/VIO

PROGRAM

RINSE

GRN
WHI/YEL

ON

WHI/GRN
WHI/BLU

OFF

NIGHT

LIMIT

TAN

TANK HEATER

HOT WATER

SOL

(OPTIONAL)

BLK

BLK

RED

WHI

GRY

BRN/WHI

J3-1

J1-8

J3-5

J3-10

J3-14

J4-1

J4-5

J4-10

J4-14

J5-1

J5-5

J5-10

J5-14

J6-1

J6-5

J6-10

J6-14

J7-1

J7-5

J7-10

GRN
RED
BLK

BRN/BLK
WHI
TAN
WHI
BLK
GRN

WHI/RED
GRN
RED
BLK

RED
WHI
RED
WHI
BLK
GRN

WHI/ORN
GRN
RED
BLK

ORN
WHI
ORN
WHI
BLK
GRN

WHI/YEL
GRN
RED
BLK

YEL
WHI
YEL
WHI
BLK
GRN

WHI/BLU
GRN
RED
BLK

BLU
WHI
BLU
WHI
BLK
GRN

J1-5

C
O
N
T
R
O
L

C
I
R
C
U
I
T

B
O
A
R
D

#
1

RED-16 (3-WIRE MODELS)
WHI-16 (3-WIRE MODELS)

FAN

BLK

AUGER MOTOR

SPEED SENSOR

1

#1

1

HOPPER EMPTY
DETECT SENSOR

AUGER MOTOR

SPEED SENSOR

1

#2

1

HOPPER EMPTY
DETECT SENSOR

AUGER MOTOR

SPEED SENSOR

1

#3

1

HOPPER EMPTY
DETECT SENSOR

AUGER MOTOR

SPEED SENSOR

1

#4

1

HOPPER EMPTY
DETECT SENSOR

M

#1

#2

#3

#4

REFILL VALVE

SOL

SOL

SOL

SOL

SOL

DISPENSE VALVE #1

DISPENSE VALVE #2

DISPENSE VALVE #3

DISPENSE VALVE #4

NOT USED ON iMIX-4 MODELS

AUGER MOTOR

SPEED SENSOR

1

SOL

#5

DISPENSE VALVE #5

1

HOPPER EMPTY
DETECT SENSOR

#5

WHI

WHI

WHI

WHI

AUGER #1

WHIPPER #1

M

AUGER #2

WHIPPER #2

M

AUGER #3

WHIPPER #3

M

AUGER #4

WHIPPER #4

M

AUGER #5

WHIPPER #5

M

M

M

M

M

M

BLU

SWITCH
BOARD

J9-7

YEL

ORN

J9-1

DISPLAY BOARD

J1-1J1-5 J2-1J2-5 J3-1J3-5 J4-1J4-5 J5-1J5-5

BLK

RED

BLU

YEL

ORN

BLK

RED

BLU

YEL

ORN

BLK

RED

J1-1J1-5 J2-1J2-5 J3-1J3-5 J4-1J4-5 J5-1J5-5

SWITCH

SWITCH

BOARD

BOARD

BLU

YEL

SWITCH

BOARD

ORN

BLK

J11-1

RED

ORN

J10-1

RED

BLU

YEL

ORN

SWITCH

BOARD

NOT USED ON

iMIX-4 MODELS

BLU

J10-4

BLK

WHI

J11-4

RED

J7-14

120 VOLTS AC - 2 WIRE

120/208-240 VOLTS AC - 3 WIRE

SINGLE PHASE, 60HZ

37262.0001B 01/05 ©2004 BUNN-O-MATIC CORPORATION

49

42032 060109

SCHEMATIC WIRING DIAGRAM

L1

iMIX-4/iMIX-5

GRN

NL2

BLK-16

BLK
BLK

BLK

TRIAC

OVERFLOW

PROTECTION SW

RED RED

BLK-16 BLK-16

LIMIT

THERMOSTAT

TANK HEATER

HOT WATER

SOL

RED-16 (3-WIRE MODELS)
WHI-16 (3-WIRE MODELS)

REFILL VALVE

SOL

WHI

FAN

BLK

WHI

M

WHI

WHI

(OPTIONAL)

BLK

BLK

RED

WHI

GRY

J1-5

RED

BLK

RED

BLK

RED

BLK

RED

BLK

BLK

J3-1

J2-1

RED

J1-1

J1-3

J1-1

J1-3

RED

BLK

1

USED ON

iMIX-4

MODELS

ONLY

GRN

J1-1

J10-1

J10-5

J10-10

GRN

J9-1

WHI

RED
BLK

J9-5

BLK

J2-1

WHI

YEL
YEL

J2-5

YEL
YEL

CONTROL

CIRCUIT

BOARD

120V : 24V AC

TRANSFORMER

MEMORY

BOARD

J1-8

J3-1

J3-5

J3-10

J3-14

J4-1

J4-5

J4-10

J4-14

J5-1

J5-5

J5-10

BRN/WHI
GRN
RED
BLK

BRN/BLK
WHI
TAN
WHI
BLK
GRN

WHI/RED
GRN
RED
BLK

RED
WHI
RED
WHI
BLK
GRN

WHI/ORN
GRN
RED
BLK

ORN
WHI
ORN
WHI
BLK
GRN

SOL

SOL

SOL

AUGER MOTOR

SPEED SENSOR

1

#1

DISPENSE VALVE #1

1

HOPPER EMPTY

DETECT SENSOR

AUGER MOTOR

SPEED SENSOR

1

#2

DISPENSE VALVE #2

1

HOPPER EMPTY
DETECT SENSOR

AUGER MOTOR

SPEED SENSOR

1

#3

DISPENSE VALVE #3

1

HOPPER EMPTY
DETECT SENSOR

AUGER #1

M

WHIPPER #1

M

#1

AUGER #2

M

WHIPPER #2

M

#2

AUGER #3

M

WHIPPER #3

M

#3

J5-14

#1

RED

BEEPER

WHI
BLK

t

PROBE

J9-7

1

TOUCHPAD

J9-1

GRN

GRN

RUN

PROGRAM

RINSE

ON

OFF

NIGHT

BLK

WHI

PNK
GRN
BLK

WHI/VIO

GRN
WHI/YEL
WHI/GRN
WHI/BLU

J8-1

J12-1

J12-5

J10-1

J12-10

J12-16

J11-1

RED

ORN

BLU

J11-4

WHI

J10-4

J6-1

J6-5

J6-10

J6-14

J7-1

J7-5

J7-10

J7-14

WHI/YEL
GRN
RED
BLK

YEL
WHI
YEL
WHI
BLK
GRN

WHI/BLU
GRN
RED
BLK

BLU
WHI
BLU
WHI
BLK
GRN

AUGER MOTOR

SPEED SENSOR

1

SOL

#4

DISPENSE VALVE #4

1

HOPPER EMPTY
DETECT SENSOR

NOT USED ON iMIX-4 MODELS

AUGER MOTOR

SPEED SENSOR

1

SOL

#5

DISPENSE VALVE #5

1

HOPPER EMPTY
DETECT SENSOR

AUGER #4

M

WHIPPER #4

M

#4

AUGER #5

M

WHIPPER #5

M

#5

DISPLAY BOARD

J1-1J1-5 J2-1J2-5 J3-1J3-5 J4-1J4-5 J5-1J5-5

BLU

YEL

ORN

BLK

RED

BLU

YEL

ORN

BLK

RED

BLU

YEL

ORN

BLK

RED

J1-1J1-5 J2-1J2-5 J3-1J3-5 J4-1J4-5 J5-1J5-5

SWITCH

BOARD

SWITCH

BOARD

SWITCH

BOARD

BLU

SWITCH
BOARD

YEL

ORN

BLK

RED

BLU

YEL

SWITCH

BOARD

NOT USED ON

iMIX-4 MODELS

ORN

50

BLK

RED

120 VOLTS AC - 2 WIRE

120/208-240 VOLTS AC - 3 WIRE

SINGLE PHASE, 60HZ

37262.0011A 01/13 ©2013 BUNN-O-MATIC CORPORATION

42032 0725135142032 060109

INPUT/OUTPUT CHART

for IMIX-3S+ & 5S+

iMIX-3S+/5S+ I/O 38831.####

PinApplication IMIX Type Values
J1-1 Program connector
J1-2 Program connector
J1-3 Program connector
J1-4 Program connector
J1-5 Program connector
J1-6 Program connector
J1-7 Program connector
J1-8 Program connector
J1-9 Program connector
J1-10 Program connector

J2-1 Auger 1Output 0 to 24 VDCAdjustable to change dispense rate
J2-2 Auger 2Output 0 to 24 VDCAdjustable to change dispense rate
J2-3 Auger 3Output 0 to 24 VDCAdjustable to change dispense rate
J2-4 Auger 4Output 0 to 24 VDCAdjustable to change dispense rate
J2-5 Auger 5Output 0 to 24 VDCAdjustable to change dispense rate
J2-6 Ground Gnd DC ground Self explanatory

J3-1 Display board I/O Comm Communication
J3-2 Display boardGRND GRND GRND
J3-3 Display board I/O Comm Communication
J3-4 Display boardOutput +8 VDC Display power supply

J4-1 N/AN/A N/AN/A
J4-2 Dispense/Whipper 1Output L1 activated with dispense
J4-3 Dispense/Whipper 2Output L1 activated with dispense
J4-4 Dispense/Whipper 3Output L1 activated with dispense
J4-5 Dispense/Whipper 4Output L1 activated with dispense
J4-6 Dispense/Whipper 5Output L1 activated with dispense
J4-7 N/AN/A N/AN/A
J4-8 Temp Sensor GRND GND
J4-9 Level Probe GRND GND
J4-10N/A N/AN/A N/A
J4-11Temp Sensor Input 0 to 5 VDCMonitors tank temperature
J4-12 Rinse position Input 0VDC in rinseSignals rinse position from rinse run switch
J4-13Inlet Output 120 VA CInlet activated with refill circuit
J4-14Safety in Input L1 Float switch supplies refill only
J4-15L1Input 120 VACSelf explanatory
J4-16 Neutral/L2 Input N or 120VAC Nuetral or second leg
J4-17 Dispense/Whipper Output N or L2 Nuetral or second leg
J4-18 Dispense/Whipper Output N or L2 Nuetral or second leg
J4-19N/A N/AN/A N/A
J4-20N/A N/AN/A N/A
J4-21Ground grnd grnd Ground for rinse/run switch
J4-22N/A N/AN/A N/A
J4-23 Run Position Input 0VDC in runSignals run position from rinse run switch
J4-24 Level Probe signal Low AC Monitors tank level

J5-1 TransformerOutput 120 VACL1
J5-2 TransformerOutput 0 or 120VAC N or L2
J5-3 N/AN/A N/AN/A
J5-4 TransformerInput 24 VACSupplies power for board operation
J5-5 TransformerInput 24 VACSupplies power for board operation

52

42032 060109

SCHEMATIC WIRING DIAGRAM

WHI

WHI

WHI

WHI

WHI

L1 N

BLU/BLK-16

GRN

OVERFLOW

SOL

REFILL VALVE

GRY

WHI

WHI

DISPENSE

VALVE #1

SOL

BRN/BLK

M

#1

WHIPPER

WHI

DISPENSE

VALVE #2

SOL

RED

M

#2

WHIPPER

BLK

PROTECTION SW

REDREDRED

WHI

DISPENSE

ORN

BLK

WHI

WHI

VALVE #3

SOL

M

#3

WHIPPER

TANK HEATER

BLK-16

LIMIT

THERMOSTAT

BLK-16

NOT USED ON

IMIX-3S+ MODELS

WHI

WHI

DISPENSE

VALVE #4

SOL

YEL

BLU

M

#4

WHIPPER

M

FAN

RUN

WHI/VIO

GRN/BLK GRN/WHI

BLK

#1

BALLAST

BLK

GRN

PROGRAM

RED/BLK RED/WHI

BLK

BALLAST

BLK

RINSE

BLK

GRY

RED

BLK

WHI WHI

WHI

WHI

DISPENSE

VALVE #5

SOL

M

#5

WHIPPER

#2

WHI/YEL

LAMP

LAMP

#1

#2

38986.0000D 04/09 ©2006 BUNN-O-MATIC CORPORATION

t

1

BLK

WHI

PROBE

SINGLE PHASE, 60HZ

120 VOLTS AC - 2 WIRE

IMIX-3S+ / IMIX-5S+

BLK-16

BLU/BLK-16

NOT USED ON

BRN/BLK

RED

ORN

J4-1

N.O.

COM

#1

AUGER

M

#2

AUGER

M

#3

AUGER

M

#4

AUGER

M

#5

AUGER

M

IMIX-3S+ MODELS

YEL

BLK

GRN

WHI

WHI/YEL

GRY

RED

BLK

WHI

WHI

J4-5

J4-10

J4-15

I

I

L

C

O

NTR

O

J2-1

WHI/RED

BRN/WHI

C

RCU

WHI/YEL

WHI/BLU

WHI/ORN

GRN

J2-6

BLK

T

J5-1

WHI

BOA

WHI

YEL

120V : 24V AC

TRANSFORMER

J4-20

R

YEL

GRN

J5-5

WHI/VIO

PNK

J4-24

D

J3-4

WHI

J5-4

BLU
ORN

J3-1

RED

J5-1

BLK

J3-6 J3-1

GRN
YEL
ORN

J6-1

DISPLAY BOARD

TOUCHPAD

J6-7

RED
TAN

SWITCH

#5 DISPENSE

SWITCH

#4 DISPENSE

SWITCH

#3 DISPENSE

SWITCH

#2 DISPENSE

SWITCH

#1 DISPENSE

NOT USED ON

IMIX-3S+ MODELS

53

42032 060109

White Strip-Tac Plus

Black Ink

~70% Reduction

Finished Size: 5.25" x 6.00"

L2
N

RED-16 3W

WHI-16 2W

WHI

WHI

WHI

L1

BLU/BLK-16

GRN

OVERFLOW

SOL

REFILL VALVE

GRY

WHI

WHI

DISPENSE

VALVE #1

SOL

BRN/BLK

M

#1

WHIPPER

WHI

DISPENSE

VALVE #2

SOL

RED

M

#2

WHIPPER

IMIX-3S+ / IMIX-5S+

BLK

PROTECTION SW

REDRED RED

WHI

DISPENSE

ORN

BLK

WHI

WHI

VALVE #3

SOL

M

#3

WHIPPER

TANK HEATER

BLK-16

LIMIT

THERMOSTAT

BLK-16

NOT USED ON

IMIX-3S+ MODELS

WHI

WHI

DISPENSE

VALVE #4

SOL

YEL

BLU

M

#4

WHIPPER

M

FAN

BLK

38986.0013A 03/13 ©2013 BUNN-O-MATIC CORPORATION

GRY

RED

BLK

WHI WHI

WHI

WHI

DISPENSE

VALVE #5

SOL

M

#5

WHIPPER

GRN

RUN

WHI/VIO

RINSE

PROGRAM

WHI/YEL

t

1

BLK

WHI

PROBE

SINGLE PHASE, 60HZ

120 VOLTS AC - 2 WIRE

120/240 VOLTS AC - 3 WIRE

SCHEMATIC WIRING DIAGRAM

RED

BLK

RED

BLK

NOT USED ON IMIX-3S+ MODELS

RED

J3-1

BLK

J2-1

J1-1

J1-3

RED

BLK

1

BRN/BLK

RED

ORN

YEL

BLK

GRN

WHI

WHI/YEL

GRY

RED

BLK

WHI

WHI

J4-5

J4-1

N.O.

BLK-16

COM

BLU/BLK-16

RED

BLK

BLK

RED

NOT USED ON

IMIX-3S+ MODELS

AUGER

AUGER

AUGER

AUGER

AUGER

CONTROL

#1

M

#2

M

#3

M

#4

M

#5

M

J4-10

CIRCUIT

J2-1

WHI/RED

BRN/WHI

WHI/YEL

WHI/ORN

J2-6

GRN

WHI/BLU

J4-15

J5-1

BLK

WHI

BOARD

WHI

YEL

120V : 24V AC

TRANSFORMER

J4-20

YEL

GRN

J5-5

WHI/VIO

PNK

J4-24

J3-4

WHI

J5-4

BLU
ORN

J3-1

BRN

J5-1

YEL

YEL

DISPLAY BOARD

J6-1

TOUCHPAD

J6-7

J3-6J3-1

BLK
GRN
YEL
ORN
RED
TAN

SWITCH

#5 DISPENSE

SWITCH

#4 DISPENSE

SWITCH

#3 DISPENSE

SWITCH

#2 DISPENSE

SWITCH

#1 DISPENSE

NOT USED ON

IMIX-3S+ MODELS

54

42032 072513

SCHEMATIC WIRING DIAGRAM

WHI

EMI

L1 N

FILTER

WHI

FUSE

BLK

BLK

THERMAL

WHI

WHI

WHI

GRN

BRN/BLK

IMIX-3S+A / IMIX-5S+A

VALVE #1

DISPENSE

SOL

M

#1

WHIPPER

BLU/BLK-16

OVERFLOW

PROTECTION SW

REDRED RED

SOL

REFILL VALVE

GRY

WHI

WHI

ORN

VALVE #3

DISPENSE

SOL

M

WHIPPER

BLK-16

BLU/BLK-16

WHI

#3

N.O.
COM

IMIX-3S+ &

NOT USED ON

IMIX-3S+A MODELS

WHI

WHI

WHI

WHI

VALVE #2

DISPENSE

SOL

RED

M

#2

WHIPPER

WHI

VALVE #4

DISPENSE

SOL

YEL

M

#4

WHIPPER

BRN/BLK

RED

ORN

YEL

J4-1

C

#1

AUGER

M

#2

AUGER

M

#3

AUGER

M

#4

AUGER

M

#5

AUGER

M

NOT USED

ON IMIX-3S+

BLU

J4-5

O

NTR

MODELS

DISPENSE

BLK

GRN

FUSE

THERMAL

LIMIT

THERMOSTAT

VALVE #5

SOL

M

#5

WHIPPER

J4-10

L

O

J2-1

WHI/RED

BRN/WHI

TANK HEATER

BLK-16

BLK-16

WHI

WHI

WHI/YEL

I

C

WHI/ORN

WHI

GRY

RED

RCU

WHI/YEL

WHI/BLU

GRN

BLK

J2-6

FAN

WHI

J4-15

I

M

BLK

WHI

WHI

T

BOA

J5-1

WHI

BLK

240V : 24V AC

GRY

GRN

WHI/VIO

J4-20

R

D

J5-5

YEL

YEL

TOUCHPAD

TRANSFORMER

#1

LAMP

GRN/BLK GRN/WHI

BLK

RED/BLK RED/WHI

BLK

#1

BALLAST

BLK

BALLAST

BLK

RED

BLK

WHI WHI

GRN

RUN

RINSE

PROGRAM

WHI/VIO

PNK

J4-24

J3-4

WHI

J5-4

BLU
ORN

J3-1

RED

J5-1

J6-1

J6-7

#2

WHI/YEL

DISPLAY BOARD

LAMP

J3-6J3-1

#2

38986.0001D 04/09 ©2006 BUNN-O-MATIC CORPORATION

SINGLE PHASE, 50HZ

PROBE

230 VOLTS AC - 2 WIRE

SWITCH

#5 DISPENSE

SWITCH

#4 DISPENSE

SWITCH

#3 DISPENSE

SWITCH

#2 DISPENSE

SWITCH

#1 DISPENSE

NOT USED ON

IMIX-3S+ & IMIX-3S+A MODELS

t

1

BLK

WHI

BLK
GRN
YEL
ORN
RED
TAN

55

42032 060109

38986.0002B 04/09 ©2009 BUNN-O-MATIC CORPORATION

SCHEMATIC WIRING DIAGRAM

GRN

WHI

WHI

WHI

L1 N

BLU/BLK-16

OVERFLOW

PROTECTION SW

HOT

SOL

REFILL VALVE

GRY

WHI

WHI

VALVE #2

DISPENSE

SOL

RED

M

#2

WHIPPER

BRN/BLK

WHI

WHI

VALVE #1

DISPENSE

SOL

M

#1

WHIPPER

BLK

REDRED RED

BLK

WHI

WHI

VALVE #3

DISPENSE

SOL

ORN

M

#3

WHIPPER

WHI

HOT

TANK HEATER

BLK-16

LIMIT

THERMOSTAT

BLK-16

WHI

WHI

VALVE #4

DISPENSE

SOL

YEL

BLU

M

#4

WHIPPER

FAN

WARM

COOLING

TANK HEATER

BLU-16

FAN

LIMIT

SWITCH

THERMOSTAT

BLU-16

68

K2

BLK

WHI

WHI

VALVE #5

DISPENSE

SOL

M

#5

WHIPPER

WHI

M

BRN/BLKBRN/BLK

87

WHI

M

FAN

BLK

GRY

RED

BLK

WHI WHI

RUN

WHI/VIO

WHI

GRN/BLK GRN/WHI

BLK

#1

BALLAST

BLK

GRN

PROGRAM

RINSE

WHI

RED/BLK RED/WHI

BLK

#2

BALLAST

BLK

WHI/YEL

LAMP

LAMP

#1

#2

WHI/BLK

RED/BLK

WARM

t

WHI

WHI

SOL

WARM

REFILL VALVE

VIO

WHI

BLK

PNK-20

123

4

LEVEL

LIQUID

BOARD

BLK

SINGLE PHASE, 60HZ

120 VOLTS AC - 2 WIRE

HOT

t

PNKPNK

GRNGRN

1

1

BLK

WHI

HOT WARM

PROBE PROBE

IMIX5S+ - HOT & ICED

WARM

BRN/BLK

RED

ORN

VIO

YEL

BLK

GRN

WHI

WHI/BLK

WHI/YEL

GRY

RED

RED/BLK

BLK

WHI

J4-5

K2

HEATER RELAY

WHIVIO

BLK-16
BLU/BLK-16

J4-1

N.O.

COM

#1

AUGER

M

#2

AUGER

M

#3

AUGER

M

#4

AUGER

M

#5

AUGER

M

J4-10

J4-15

I

I

L

C

O

NTR

O

J2-1

WHI/RED

BRN/WHI

C

RCU

WHI/YEL

WHI/ORN

J2-6

GRN

WHI/BLU

T

BLK

WHI

WHI

BOA

J5-1

WHI

120V : 24V AC

WHI/VIO

GRN

J4-20

R

D

J5-5

YEL

YEL

TOUCHPAD

TRANSFORMER

PNK

J4-24

J3-4

WHI

J5-4

BLU
ORN

J3-1

RED

J5-1

BLK

J3-6J3-1

GRN
YEL
ORN

J6-1

DISPLAY BOARD

J6-7

RED
TAN

SWITCH

#5 DISPENSE

SWITCH

#4 DISPENSE

SWITCH

#3 DISPENSE

SWITCH

#2 DISPENSE

SWITCH

#1 DISPENSE

56

42032 060109

38986.0012A 01/13 ©2013 BUNN-O-MATIC CORPORATION

120 VOLTS AC - 2 WIRE

SINGLE PHASE, 60HZ

SCHEMATIC WIRING DIAGRAM

IMIX5S+ - HOT & ICED

GRN

BLK-16

BLK-16

LIMIT

THERMOSTAT

CONTROL

CIRCUIT

BOARD

J4-5

J4-1

J4-10

J4-15

J4-20

J4-24

J5-5

J5-1

J2-6

J2-1

J3-4

J5-4

J3-1

J5-1

120V : 24V AC

TRANSFORMER

BRN/WHI

WHI/RED

WHI/ORN

WHI/YEL

WHI/BLU

GRN

WHI

BLK

YEL

YEL

YEL

YEL

RUN

PROGRAM

RINSE

HOT WARM

WARM

HOT

WHI/YEL

WHI/VIO

RED

ORN

BLU

WHI

GRN

GRNGRN

J3-6J3-1

DISPLAY BOARD

#1 DISPENSE

SWITCH

TAN

RED

ORN

YEL

BLK
GRN

J6-1

J6-7

TOUCHPAD

DISPENSE

VALVE #1

M

WHIPPER

#1

BRN/BLK

BRN/BLK

RED

RED

ORN

VIO

ORN

YEL

YEL

BLU

BLK

GRN

WHI

WHI/BLK

HOT

TANK HEATER

BLU/BLK-16

BLU/BLK-16

BLK-16

WHI/YEL

GRY

RED

RED/BLK

BLK

WHI

GRY

GRY

RED

BLK

WHI WHI

WHI

WHI

VIO

WHI

WHI

WHI

WHI

WHI

WHI

WHI

WHI

WHI

WHI

WHI

WHI

WHI

WHI

WHI

WHI

WHI

WHI VIO

WHI

GRN

WHI/VIO

PNK

PNKPNK

SOL

DISPENSE

VALVE #2

M

WHIPPER

#2

SOL

DISPENSE

VALVE #3

M

WHIPPER

#3

SOL

DISPENSE

VALVE #4

M

WHIPPER

#4

SOL

DISPENSE

VALVE #5

M

WHIPPER

#5

SOL

PROBE PROBE

1

t

RED/BLK

WHI/BLK

1

t

WHI

BLK

#2 DISPENSE

SWITCH

#3 DISPENSE

SWITCH

#4 DISPENSE

SWITCH

#5 DISPENSE

SWITCH

M

AUGER

#1

M

AUGER

#2

M

AUGER

#3

M

AUGER

#4

M

AUGER

#5

REDRED RED

OVERFLOW

PROTECTION SW

BLK

BLK

BLK

FAN

SOL

REFILL VALVE

HOT

M

L1 N

White Strip-Tac Plus

Black Ink

~40% Reduction

Finished Size: 6.00" x 5.25"

K2

WARM

HEATER RELAY

68

8 7

K2

BLK

M

BLU-16

BLU-16

LIMIT

THERMOSTAT

WARM

TANK HEATER

WHI

COOLING

FAN

FAN

SWITCH

BRN/BLKBRN/BLK

PNK-20

123

4

LIQUID

LEVEL

BOARD

SOL

REFILL VALVE

WARM

N.O.

COM

1

J3-1

J2-1

J1-1

J1-3

RED

BLK

RED

BLK

RED

BLK

RED

BLK

BLK

RED

RED

BLK

57

42032 072513