IMIX® &
IMIX®-S+
SERVICE & REPAIR MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
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 (217) 529-6601 or by writing to Post Office
Box 3227, Springfield, Illinois 62708-3227; 2) if requested by BUNN, shipping the defective equipment prepaid to an
authorized BUNN service location; and 3) receiving prior authorization from BUNN that the defective equipment is under
warranty.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR ORAL, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. The agents, dealers or employees of BUNN are not authorized to make
modifications to this warranty or to make additional warranties that are binding on BUNN. Accordingly, statements by such
individuals, whether oral or written, do not constitute warranties and should not be relied upon.
If BUNN determines in its sole discretion that the equipment does not conform to the warranty, BUNN, at its exclusive option while the equipment is under warranty, shall either 1) provide at no charge replacement parts and/or labor (during the
applicable parts and labor warranty periods specified above) to repair the defective components, provided that this repair
is done by a BUNN Authorized Service Representative; or 2) shall replace the equipment or refund the purchase price for
the equipment.
THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS
EQUIPMENT, WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AT BUNN’S SOLE OPTION
AS SPECIFIED HEREIN, TO REPAIR, REPLACEMENT OR REFUND.
In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of
use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities
or services, or any other special, incidental or consequential damages.
392, 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.
7
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 x 7d
8
Whipper Models only
Modelos batidor sólo
1
5
2
7
6
4
3
or
a. Wash
b. Rinse
c. Sanitize
d. Dry
a
b
a. Lave
b. Enjuague
c. Desinfecte
d. Seque
c
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
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)
25732.0000Steam Collector
25733.0003Mixing Chamber
25734.0000Whipper Chamber
25736.0000Dispense Tip
24733.0010O-ring
25902.0000Frother
26356.0000Shaft Seal
28866.0000Receptacle
25903.0000Elbow
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 qualified 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 specified.
Follow recommended service procedures
Replace all protective shields or safety notices
PROBLEM
Product will not dispense:
PROBABLE CAUSE
1. No water
REMEDY
Water lines and valves to the dispenser must be
open. Read display for error.
-no water and no powder (#2,3,7,11)
2. No power or incorrect voltage to the Check for 120 volts at the terminal block across
-yes water and no powder (#6,9,10,12) dispenser
the black and white wires on a two wire 120 volt
dispenser
-no water and yes powder (#1,4,5,8)
3. Dispense switch
Test dispense switch circuit, see “TEST SWITCHES ?” under “DIAGNOSTICS ?” menu.
4. Dispense solenoid valve
Test dispense solenoid valve circuit, see “TEST
DISPENSE HEAD ?” under “DIAGNOSTICS ?”
menu.
5. Solenoid valve (inlet)
Test inlet solenoid valve, see “TEST REFIL ?”
under “DIAGNOSTIC ?” menu. Read display for
error.
6. Auger drive
Test auger motor circuit, see “TEST DISPENSE
HEAD ?” under “DIAGNOSTICS ?” menu.
7. Overflow protection Switch
Check for water in overflow cup. Read display
for error.
8. Lime build-up
Inspect tank assembly for excessive lime deposits. Delime as required.
9. Hopper not seated on panel
Seat hopper so that front leg engages metal tab
on hopper panel.
10. Hopper out of product
Refill hopper with correct product
11. Rinse cycle not run within pro- Refer to Operations – Rinse Timer
grammed time frame
12. Low product detect on and low pow- Remove hopper to check level or calibrate hopder.
per
6
42032 060109
TROUBLESHOOTING (cont.)
PROBLEM
Water is not hot
Spitting or excessive steaming
Dripping from dispense tip
Water flows into tank continuously
Product overflows mixing chamber
PROBABLE CAUSE
REMEDY
1. Limit thermostat
Disconnect power and disconnect limit thermostat from wiring harness and test for continuity
2. Control thermostat
(A) Check tank temperature setting in Programming menu
(B) Check temperature probe function and calibration, see “CAL tank temp” under “CALIBRATION ?” menu
3. Triac
Test triac, use “TANK HEATER ?” under “DIAGNOSTICS ?” menu
4. Tank heater
Disconnect wire leads from tank heater, check
for continuity across tank heater leads.
1. Lime build up
Inspect tank assembly for excessive lime deposits. Delime as required.
2. Control thermostat
(A) Check tank temperature setting in Programming menu
(B) Check temperature probe function and calibration, see “CAL tank temp” under “CALIBRATION ?” menu
1. Lime build up
Inspect tank assembly for excessive lime deposits. Delime as required.
2. Dispense Solenoid Valve
Remove the dispense solenoid valve and clear
any obstructions. Rebuild or replace valve as
necessary.
1. Level probe
Check for lime buildup on level probe. Clean as
required.
2. Solenoid valve (inlet)
Test inlet solenoid valve, see “TEST REFIL ?” under “DIAGNOSTIC ?” menu
3. Control board
Test inlet solenoid valve circuit, see “TEST REFIL
?” under “DIAGNOSTIC ?” menu
1. Dispense tip
Check dispense tip for obstructions.
2. Dispense solenoid valve
Check valve flow rate.
3. Vacuum fan
Check vacuum fan operation.
7
42032 060109
TROUBLESHOOTING (cont.)
PROBLEM
Weak product
PROBABLE CAUSE
REMEDY
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
Test whipper motor circuit, see “TEST DISPENSE
HEAD ?” under “DIAGNOSTICS ?” menu.
3. Frother
Check that frother is properly installed; refer to
cleaning decal inside front door.
4. Dispense solenoid valve
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.
5. Auger motor
Test auger motor circuit, see “TEST DISPENSE
HEAD ?” under “DIAGNOSTICS ?” menu
6. Auger spring
Check that auger spring is properly installed, refer to cleaning decal inside of front door.
7. NORMAL/PROGRAM/RINSE switch
Check that switch is set in the “NORMAL” position.
8. Hopper out of product
Refill hopper with correct product
9. Incorrect throw weight
Check throw weight
1. Plumbing lines
Plumbing lines should not be resting on the
counter top.
2. Water Supply
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).
3. Tank heater
Remove and clean lime off tank heater
4. Frother
Check for cleanliness and correct installation of
chamber and frother
Excessive dust
1. Fan
(A) remove powder tray and clean as required
(B) check that air is blowing from slots in dispenser bottom panel.
Display not lit
1. Lamp
Replace lamp if required
2. Ballast
Disconnect ballast from power supply, check for
continuity between two black leads.
3. Night Mode
Check Night Mode Switch
Dispenser making unusual noises
8
42032 060109
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
LCD screen displays:
“FILL TIME TOO LONG”,
“CHECK WATER SUPPLY”
Occurs when refill runs without dispens- (A) Test inlet solenoid valve, see “TEST REFIL ?”
es and without satisfying tank probe for under “DIAGNOSTIC ?” menu
more than 10 minutes
(B) Check that unit is connected to water supply,
and water supply is turned on.
LCD screen displays;
“HEATING TIME”
“TOO LONG”
Occurs when heater runs for more than See “water is not hot” in PROBLEM section
120 minutes, refill does not come on , and above.
tank is still below target temperature.
“CHECK HEATING” “CIRCUIT”
LCD screen displays: “OVERFLOW
CUP”
“FULL, EMPTY CUP”
Occurs when overflow cup is full of wa- (A) Empty overflow cup of water
ter
(B) Check for lime on level probe
(C) Test inlet solenoid valve, see “TEST REFIL ?”
under “DIAGNOSTIC ?” menu
(D) Check float switch for continuity
“CHECK REFILL”
“CIRCUIT”
LCD screen displays:
“TANK TEMP SENSOR”
“OUT OF RANGE”,
Occurs when tank sensor is disconnected (A) Check that tank temp sensor is connected to
or resistance to high
main wiring harness.
(B) Test tank temp sensor, see “CAL tank temp”
under “CALIBRATION ?” menu
(C) Verify wiring
“CHECK FOR BAD” “CONNECTIONS”
LCD screen displays:
“TANK TEMP SENSOR”
“OUT OF RANGE”,
Occurs when tank temperature sensor (A) Disconnect tank temperature from main wire
wires are shorted together, or resistance harness, check for zero resistance across leads.
is to low.
(B) Test tank temp sensor, see “CAL tank temp”
under “CALIBRATION ?” menu
(C) Verify wiring
“CHECK WIRE FOR” “SHORTS”
LCD screen displays:
“AUGER 1 FAULT!”
“CHECK MOTOR WIRING”,
Occurs when auger motor should be run- Test auger motor circuit, see “TEST DISPENSE
ning, but no pulses are detected from the HEAD ?” under “DIAGNOSTICS ?” menu
RPM sensor
“CHK RPM SENSOR”
“CHK MOTOR WIRING”
LCD screen displays:
“DISPLAY BOARD”
“COMM FAULT!”
Occurs if display communication lost
Not applicable on (S)
“CHECK DISPLAY”
“ WIRING CONNECTS”
LCD screen displays:
“HOPPER 1 EMPTY?”
“MUST FILL HOPPER”
Occurs when low powder sensor returns (A) fill hopper with correct product
a value lower than threshold
Not applicable on (S)
LCD screen displays:
“DISPNSE TO LONG”
“CHECK SWITCHES”,
Occurs when hot water is dispensed for (B) Calibrate hopper level sensor, see “CAL HOPmore than 2 minutes
PER 1 ?” under “CALIBRATION ?” menu
Test dispense switch circuit, see “TEST SWITCHES ?” under “DIAGNOSTICS ?” menu.
“CHECK WIRE FOR”
“SHORTS”
LCD screen displays:
“RINSE REQUIRED!”
PLEASE RINSE NOW”
“TO OPERATE”
LCD screen displays:
“ENTER SETUP MODE”
“TO CLEAR FAULT”
(A) Check wiring between main control board
and display
(B) Replace display board
Occurs when a rinse has not been per- Refer to Operations – Rinse Timer
formed within the specified time period
and the rinse alarm is enabled.
All fault messages show this for the last Enter “SETUP” mode to clear fault after problem
of 3 alternating screens.
has been corrected.
9
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
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.
P3250.25
Location:
The BEEPER is located on the back side of the
component bracket assembly.
Test Procedures:
1. Enter Programming to verify the “Audible Alarm”
is activated. It will always beep when pressing
switches during program modes.
BLK to J8-1
on Control Board
RED to J8-2
on Control Board
AUDIBLE ALARM ?
NO EXIT YES
FIG. 3 AUDIO INDICATOR
BEEPER
If activated, verify it is plugged correctly into J8 on the
control board.
P3250.25
Specifications:
SOUND PRESSURE LEVEL
RESONANT FREQUENCY
RATED CURRENT
RATED VOLTAGE
OPERATING VOLTAGE
13
90 dBA
2800 Hz
7 mA
12 VDC
3 - 28 VDC
42032 060109
SERVICE (CONT.)
AUGER DRIVE COMPONENTS
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.
FIG. 4 AUGER DRIVE COMPONENTS
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.
P1341
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.
14
42032 060109
SERVICE (CONT.)
AUGER DRIVE COMPONENTS
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
4
2
3
5
6
17
18
8
16
9
12
11
7
10
15
13
14
P2210.30
FIG. 5 AUGER DRIVE & HOPPER DISASSEMBLY
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.
RED (+)
BLK (-)
4-24 VDC
P1639
FIG. 6 AUGER MOTOR TERMINALS
15
42032 060109
SERVICE (CONT.)
AUGER MOTOR PROXIMITY RPM SENSOR (IMIX-3, 4 & 5 only)
MAGNET
NUT &
LOCKWASHER
BLK - COMMON
GRN - SIGNAL
RED - +5VDC
PROXIMITY
SENSOR
FIG. 7 AUGER MOTOR PROXIMITY SENSOR
FIG. 8 PROXIMITY SENSOR TERMINALS
Location:
The Proximity Sensor and Magnet are located on
the back side of the Auger Motor assembly.
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.
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.
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 secure ballast to the component bracket.
5. Refer to Fig. 10 when reconnecting the wires.
BLK to Main Wiring
Harness
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.
FIG. 10 BALLAST TERMINALS
P1447
If continuity is present as described the ballast is operating properly.
If continuity is not present as described, replace the
ballast.
17
42032 060109
SERVICE (cont.)
CONTROL BOARD (IMIX-3, 4 & 5 only)
If voltage is present as described, proceed to step 9.
If voltage is not present as described, refer to the Wiring Diagrams and check the dispenser wiring harness
back to the power cord. Also check for an open float
switch.
FIG. 11 CONTROL BOARD
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.
P3250.25
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 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.
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).
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 component 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)
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.
FIG. 13 CONTROL BOARD
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.
P3250.25
Location:
The Control Board is located behind the lower front
access cover mounted on the component bracket.
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.
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 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.
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.
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
FIG. 15 PROGRAMMING TOUCHPAD
P1680
Digital Beverage Control
PORTION CONTROL
Location:
The Touchpad is located on the front of the door
below the display panel.
PUSH BUTTON
Test Procedure:
Enter Programming and Test Switches.
TOUCHPAD
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.
J9-7
J9-1
DISPLAY BOARD
FIG. 16 TOUCHPAD CONNECTORS
22
P1680
42032 060109
SERVICE (cont.)
Calibration
PROGRAMMING - CALIBRATION & DIAGNOSTICS
TANK TEMP XXX°
(-) EXIT (+)
READY TEMP XXX°
(-) EXIT (+)
Adjust tank
temperature
Adjust minimum
tank ready
temperature for
lockout
ENTER ASSET # ?
EXIT YES
ENABLE SERVICE ?
NO EXIT YES
(B)
DISPLAY USAGE ?
EXIT YES
CALIBRATION ?
EXIT YES
(A)
LOCKS/DISABLES ?
EXIT YES
To
Calibration
TEST SWITCHES ?
Use Switch To Test
CAL HOPPER 1 ?
NO
YES
TEST HEATER ?
EXIT YES
TEST REFILL ?
EXIT YES
XX° CAL
XX°
(-) Tank Temp (+)
TEST HOT WATER ?
EXIT YES
235 REFILL 155
(-) EXIT (+)
DIAGNOSTICS ?
EXIT YES
ENTER PASSWORD
(-) XXXX (+)
SELECT UNITS
ENG EXIT METRIC
Goes to next station.
Continues after last station.
ENABLE EnergySavr ?
NO EXIT YES
STRENGTH ADJ. ?
EXIT YES
Diagnostics
TEST AUGERS ?
DISPENSE TO TEST
To
Diagnostics
CAL WATER 1 ?
PRESS DISPENSE
TEST DISPENSE HEAD?
DISPENSE TO TEST
ENTER VOLUME 1
(-) XX.X oz
(+)
FACTORY DEFAULTS
NO
YES
Returns to B
CAL POWDER 1 ?
PRESS DISPENSE
AUDIBLE ALARM ?
NO EXIT YES
FINISHED, returns
to main screen
ENTER WEIGHT 1
(-) XX.X gm (+)
DISABLE MESSAGES ?
NO EXIT YES
Goes to next station.
Continues after last station.
ENABLE ADS ?
NO EXIT YES
(-)
Auger Delay
.XX sec (+)
Returns to A
23
42032 060109
SERVICE (cont.)
MEMORY CLOCK BOARD (Early Models) (IMIX-3, 4 & 5 only)
FIG. 17 MEMORY CLOCK BOARD
Removal and Replacement:
1. Disconnect the wiring harness from the memory
board.
2. Remove the two #6-32 screws securing the memory board to the component bracket.
3. Remove the two spacers from the memory
board.
4. Remove and discard memory board.
5. Install the two spacers to the new memory
board.
6. Install new memory board using two #6-32 screws
to secure board to the component bracket.
7. Refer to Fig. 18 when reconnecting the wires.
P3250.25
Location:
The Memory Clock Control Board is located on the
back side of the component bracket assembly.
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
MEMORY
BOARD
+5VDC
J1-5
GRN
WHI
RED
BLK
FIG. 18 MEMORY CLOCK BOARD CONNECTORS
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.
BLK pin 1
WHI pin 2
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.
FIG. 20 TEMPERATURE PROBE
TEMP
READY
190° F
87.0° C
25
ROOM
70° F
21.1° C
RESISTANCE
VOLTAGE
891 Ω
1.5VDC
11.9k Ω
4.5VDC
42032 060109
SERVICE (cont.)
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.
DISPENSE SWITCHES (IMIX-3S+ & 5S+ only)
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.
FIG.21 DISPENSE SWITCHES
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.
P3645
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.
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.
Station #3
BLK
TAN
Station #2
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.
BLK
GRN
Station #1
BLK
YEL
Station #5
Station #4
P1449
FIG. 22 DISPENSE SWITCH TERMINALS
26
42032 060109
SERVICE (cont.)
DISPENSE SWITCHES
PUSH BUTTON
FIG.23 DISPENSE SWITCHES
P3243
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.
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)
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.
FIG. 25 EMI FILTER
P3250.25
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.
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.
FIG. 26 EMI FILTER CONNECTORS
If resistance is present as described the EMI Filter is
operating properly.
If resistance is not present as described, replace the
EMI Filter.
28
42032 060109
SERVICE (cont.)
VACUUM 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
FIG. 27 FAN
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.
WHI from Main Wiring Harness
FIG. 28 FAN TERMINALS
P1507
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.
29
42032 060109
SERVICE (cont.)
11 12 13
FROTHER AND WHIPPER MOTOR
1
2
P1641.40
FIG. 29 FROTHER AND WHIPPER MOTOR
10
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.
9
8
7 6
5
4
3
FIG. 30 MIXING/WHIPPER CHAMBER
COMPONENTS
1. Steam Collector
2. Mixing Chamber
3. Dispense Tip
4. Whipper Chamber
5. O-Ring
6.Frother
7. Nut
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.
P1630.35
8. Receptacle w/Seal
9. Slinger
10. Motor Assy.
11.Fan
12. Vacuum Hose
13.Baffle
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.)
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.
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.
BLK to Main Harness
BLK to Main Harness
FIG.31 WHIPPER MOTOR TERMINALS
31
P1451.40
42032 060109
SERVICE (cont.)
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.
LAMP AND LAMP HOLDER
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.
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.
If continuity is present as described, lamp holders are
operating properly.
If continuity is not present as described replace the
lamp holder.
FIG. 33 LAMPS & HOLDERS
32
42032 060109
SERVICE (cont.)
LED LIGHTED DOORS
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.
IMIX-3 Shown
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.
FIG. 34 LED LIGHTS
Location:
The LED hopper lights are located on the front of
the upper panel behind the display panel.
IMIX-3 Shown
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.
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
FIG. 37 LIMIT THERMOSTAT TERMINALS
P1637
P1800
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.
34
42032 060109
SERVICE (cont.)
ON/OFF/NIGHT SWITCH
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.
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.
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.
FIG. 39 ON/OFF/NIGHT
SWITCH TERMINALS
If continuity is present as described, the switch is
operating properly.
If continuity is not present as described, replace the
switch.
35
P1800
42032 060109
SERVICE (cont.)
NORMAL/PROGRAM/RINSE SWITCH
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.
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.
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.
FIG. 41 NORMAL/PROGRAM/RINSE
SWITCH TERMINALS
If continuity is present as described, the switch is
operating properly.
If continuity is not present as described, replace the
switch.
36
P1800
42032 060109
SERVICE (cont.)
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.
OVERFLOW PROTECTION SWITCH
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.
FIG. 42 OVERFLOW PROTECTION SWITCH
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.
FIG. 43 OVERFLOW PROTECTION
SWITCH LEADS
P1212
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.
37
42032 060109
SERVICE (cont.)
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.
SOLENOID VALVE (INLET)
FIG. 44 INLET 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.
P1445.40
Location:
The inlet solenoid is located inside on the rear of
the dispenser base.
Early Models
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.
120V 1.2 kΩ
230V 3.84 kΩ
Late Models
If continuity is present as described, reconnect the two
wires to the solenoid.
If continuity is not present as described, replace the
solenoid valve.
120V 622 Ω
230V 1555 Ω
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.
P1217
FIG. 45 INLET SOLENOID VALVE TERMINALS
38
42032 060109
SERVICE (cont.)
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.
SOLENOID VALVES (DISPENSE)
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.
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.
Dispense Station
#1BRN/BLK
Dispense Station
#2RED
Dispense Station
#3ORN
Dispense Station
#4YEL
Dispense Station
#5BLU
5. 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.
WHI to Control Board
FIG. 47 DISPENSE SOLENOID VALVE
TERMINALS
39
P1645
42032 060109
SERVICE (cont.)
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.
TANK HEATER
FIG. 48 TANK HEATER
P1637.40
Location:
The tank heater is located inside the tank and secured 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 models.
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.
BLK Wire from
Main Harness
WHI or RED Wire
from Main Harness
P1637.40
FIG. 49 TANK HEATER TERMINALS
NOTE - If the tank heater remains unable to heat, remove
and inspect heater for cracks in the sheath.
40
42032 060109
SERVICE (cont.)
TRANSFORMER
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.
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.
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.
WHI - 120V T2, 240V T6
BLK - TI
P1647
FIG. 51 TRANSFORMER TERMINALS
41
42032 060109
SERVICE (cont.)
TRIAC
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.
FIG. 52 TRIAC
Location:
The triac is mounted on the right side of the tank
mounting bracket for models IMIX-3,4 & 5.
TAN to Main Harness
BLK to Terminal Block
BLU to Limit Thermostat
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.
FIG. 53 TRIAC TERMINALS
42
42032 060109
INPUT/OUTPUT CHART
for IMIX-3,4,5
Pin
J1-1
J1-2
J1-3
J1-4
J1-5
J1-6
J1-7
J1-8
Application IMIX
N/A
Heater
Safety in
Neutral/L2
L1
Light
Hot Water
Inlet
Type
N/A
Output
Input
Input
Input
Output
Output
Output
iMIX-3/4/5 I/O 37104.####
Values
N/A
N/A
120 VAC
Triac signal
Float switch IMIX and ICED
N or 120VAC
Self explanatory
120 VAC
Self explanatory
120 VAC
Turns on Ballast
120 VAC
Self explanatory
120 VAC
Inlet activated with refill circuit
J2-1
J2-2
J2-3
J2-4
J2-5
Transformer
Transformer
N/A
Transformer
Transformer
Output
Output
N/A
Input
Input
120 VAC
0 or 120VAC
N/A
24 VAC
24 VAC
Self explanatory
Self explanatory
N/A
Supplies power for board operation
Supplies power for board operation
J3-1
J3-2
J3-3
J3-4
J3-5
J3-6
J3-7
J3-8
J3-9
J3-10
J3-11
J3-12
J3-13
J3-14
Auger 1
RPM sensor
RPM sensor
RPM sensor
N/A
Dispense/Whipper
Dispense/Whipper
Low powder detect
Low powder detect
Low powder detect
Ground
N/A
N/A
N/A
Output
Input
Output
Output
N/A
Output
Output
?
Output
?
Gnd
N/A
N/A
N/A
0 to 24 VDC
Signal
5 VDC +
Negative
N/A
N or L2
L1
?
5 VDC +
?
DC ground
N/A
N/A
N/A
Adjustable to change dispense rate
Hall Effect
Power supply to Hall Effect
Power supply to Hall Effect
N/A
Neutral or second leg
Leg 1 activated with dispense
?
Sensor power supply
?
Self explanatory
N/A
N/A
N/A
J4-1
J4-2
J4-3
J4-4
J4-5
J4-6
J4-7
J4-8
J4-9
J4-10
J4-11
J4-12
J4-13
J4-14
Auger 2
RPM sensor
RPM sensor
RPM sensor
N/A
Dispense/Whipper
Dispense/Whipper
Low powder detect
Low powder detect
Low powder detect
Ground
N/A
N/A
N/A
Output
Input
Output
Output
N/A
Output
Output
?
Output
?
Gnd
N/A
N/A
N/A
0 to 24 VDC
Signal
5 VDC +
Negative
N/A
N or L2
L1
?
5 VDC +
?
DC ground
N/A
N/A
N/A
Adjustable to change dispense rate
Hall Effect
Power supply to Hall Effect
Power supply to Hall Effect
N/A
Nuetral or second leg
Leg 1 activated with dispense
?
Sensor power supply
?
Self explanatory
N/A
N/A
N/A
J5-1
J5-2
J5-3
J5-4
J5-5
J5-6
J5-7
J5-8
J5-9
J5-10
J5-11
J5-12
J5-13
J5-14
Auger 3
RPM sensor
RPM sensor
RPM sensor
N/A
Dispense/Whipper
Dispense/Whipper
Low powder detect
Low powder detect
Low powder detect
Ground
N/A
N/A
N/A
Output
Input
Output
Output
N/A
Output
Output
?
Output
?
Gnd
N/A
N/A
N/A
0 to 24 VDC
Signal
5 VDC +
Negative
N/A
N or L2
L1
?
5 VDC +
?
DC ground
N/A
N/A
N/A
Adjustable to change dispense rate
Hall Effect
Power supply to Hall Effect
Power supply to Hall Effect
N/A
Nuetral or second leg
Leg 1 activated with dispense
?
Sensor power supply
?
Self explanatory
N/A
N/A
N/A
43
J6-1
Auger 4
Output 0 to 24 VDC
42032 060109
Adjustable to change dispense rate
J5-11
J5-12
J5-13
J5-14
Ground
N/A
N/A
N/A
Gnd
N/A
N/A
N/A
DC ground
N/A
N/A
N/A
Self explanatory
N/A
N/A
N/A
J6-1
J6-2
J6-3
J6-4
J6-5
J6-6
J6-7
J6-8
J6-9
J6-10
J6-11
J6-12
J6-13
J6-14
Auger 4
RPM sensor
RPM sensor
RPM sensor
N/A
Dispense/Whipper
Dispense/Whipper
Low powder detect
Low powder detect
Low powder detect
Ground
N/A
N/A
N/A
Output
Input
Output
Output
N/A
Output
Output
?
Output
?
Gnd
N/A
N/A
N/A
0 to 24 VDC
Signal
5 VDC +
Negative
N/A
N or L2
L1
?
5 VDC +
?
DC ground
N/A
N/A
N/A
Adjustable to change dispense rate
Hall Effect
Power supply to Hall Effect
Power supply to Hall Effect
N/A
Nuetral or second leg
Leg 1 activated with dispense
?
Sensor power supply
?
Self explanatory
N/A
N/A
N/A
J7-1
J7-2
J7-3
J7-4
J7-5
J7-6
J7-7
J7-8
J7-9
J7-10
J7-11
J7-12
J7-13
J7-14
Auger 5
RPM sensor
RPM sensor
RPM sensor
N/A
Dispense/Whipper
Dispense/Whipper
Low powder detect
Low powder detect
Low powder detect
Ground
N/A
N/A
N/A
Output
Input
Output
Output
N/A
Output
Output
?
Output
?
Gnd
N/A
N/A
N/A
0 to 24 VDC
Signal
5 VDC +
Negative
N/A
N or L2
L1
?
5 VDC +
?
DC ground
N/A
N/A
N/A
Adjustable to change dispense rate
Hall Effect
Power supply to Hall Effect
Power supply to Hall Effect
N/A
Nuetral or second leg
Leg 1 activated with dispense
?
Sensor power supply
?
Self explanatory
N/A
N/A
N/A
J8-1
J8-2
Beeper
Beeper
Output 8 VDC
Output Ground
J9-1
J9-2
J9-3
J9-4
J9-5
External Novram
External Novram
External Novram
External Novram
External Novram
J10-1
J10-2
J10-3
J10-4
J10-5
J10-6
J10-7
J10-8
J10-9
J10-10
J10-11
J10-12
J10-13
?
?
?
?
?
?
?
?
?
?
?
?
?
J11-1
J11-2
J11-3
J11-4
Display board
Display board
Display board
Display board
Output
I/O
GRND
I/O
8 VDC
Comm
GRND
Comm
J12-1
J12-2
J12-3
J12-4
Temp Sensor
N/A
Level Probe
Level Probe
Input
N/A
signal
grnd
Varistor
N/A
Low AC
Low AC
INPUT/OUTPUT CHART (Continued)
for IMIX-3,4,5
Self explanatory
Self explanatory
External Novram
External Novram
External Novram
External Novram
External Novram
External Novram
External Novram
External Novram
External Novram
External Novram
Shorted to J10-13
Shorted to J10-1
Display power supply
Communication
GRND
Communication
44
N/A
Monitors tank level
Monitors tank level
42032 060109
J11-2
J11-3
J11-4
Display board
Display board
Display board
I/O
Comm
GRND GRND
I/O
Comm
Communication
GRND
Communication
INPUT/OUTPUT CHART (Continued)
for IMIX-3,4,5
J12-1
J12-2
J12-3
J12-4
J12-5
J12-6
J12-7
J12-8
J12-9
J12-10
J12-11
J12-12
J12-13
J12-14
J12-15
J12-16
Temp Sensor
N/A
Level Probe
Level Probe
Temp Sensor
N/A
Run Position
N/A
N/A
N/A
N/A
N/A
Ground
Rinse position
On position
Off position
J13-1
J13-2
J13-3
J13-4
J13-5
J13-6
J13-7
J13-8
J13-9
J13-10
Program connector
Program connector
Program connector
Program connector
Program connector
Program connector
Program connector
Program connector
Program connector
Program connector
Input
N/A
signal
grnd
Input
N/A
Input
N/A
N/A
N/A
N/A
N/A
grnd
Input
Input
Input
Varistor
N/A
Low AC
Low AC
?
N/A
?
N/A
N/A
N/A
N/A
N/A
grnd
?
?
?
N/A
Monitors tank level
Monitors tank level
N/A
Signals run position from rinse run switch
N/A
N/A
N/A
N/A
N/A
Ground for rinse/run and day night switches
Signals rinse position from rinse run switch
Signal on from day night switch
Signal off from day night switch
45
42032 060109
SCHEMATIC WIRING DIAGRAM
iMIX-3
L1
LIMIT
THERMOSTAT
TRIAC
BLK-16
BLU-16
GRN
TANK HEATER
BLK-16
L2
N
RED-16 (3-WIRE MODELS)
WHI-16 (3-WIRE MODELS)
WHI
FAN
BLK
BLK
BLK
OVERFLOW
PROTECTION SW
RED
BLK
WHI
M
REFILL VALVE
WHI
SOL
RED
HOT WATER
WHI
SOL
GRN/BLK
BLK
BALLAST 2
BLK
BLK
BLK
BLK
(OPTIONAL)
J1-5
J1-1
BLU/BLK
RED/WHI
WHI
GRN/WHI
WHI
BLU/WHI
WHI
GRN
J10-1
J10-5
J4-1
4
GRN
1
WHI
WHI
WHI/RED
WHI/GRN
J3-10
J4-5
J10-10
J4-10
RED
BLK
RIGHT
LAMP ASSY.
BLK
WHI
120V : 24V AC
TRANSFORMER
YEL
YEL
RED
BLK
BEEPER
WHI
WHI
BLK
BRN/BLK
WHI
TAN
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#1
SOL
M
WHIPPER #1
M
DISPENSE VALVE #1
1 HOPPER EMPTY
DETECT SENSOR
#1
1
J9-5
J2-1
J2-5
J8-1
J12-1
AUGER #2
WHI/RED
GRN
RED
BLK
RED
WHI
RED
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#2
SOL
M
WHIPPER #2
M
DISPENSE VALVE #2
1 HOPPER EMPTY
DETECT SENSOR
#2
J4-14
J5-1
J5-5
J5-10
AUGER #3
WHI/ORN
GRN
RED
BLK
ORN
WHI
ORN
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#3
SOL
M
WHIPPER #3
M
DISPENSE VALVE #3
1 HOPPER EMPTY
DETECT SENSOR
#3
J5-14
TOUCHPAD
J12-5
RUN
ON
GRN
OFF
J12-10
GRN
WHI/YEL
WHI/GRN
WHI/BLU
J11-1
J11-4
J12-16
120 VOLTS AC - 2 WIRE
120/208-240 VOLTS AC - 3 WIRE
SINGLE PHASE, 60HZ
©2004 BUNN-O-MATIC CORPORATION
J10-1
J9-7
J10-4
J1-5
NIGHT
37478.0000D 01/05
RED
ORN
BLU
WHI
J9-1
DISPLAY BOARD
J1-1 J2-5
J2-1 J3-5
J3-1
BLU
YEL
ORN
BLK
RED
RINSE
BLU
YEL
ORN
BLK
RED
GRN
PROBE
WHI/VIO
PROGRAM
BLU
YEL
ORN
BLK
RED
t
PNK
GRN
BLK
J9-1
CONTROL CIRCUIT BOARD #1
GRN
WHI
MEMORY
BOARD
LEFT LAMP
ASSY.
BRN/WHI
GRN
RED
BLK
J3-14
RED/WHI
GRN/WHI
BLU/WHI
GRN
RED/BLK
GRN/BLK
BLU/BLK
4
1
AUGER #1
J3-1
J3-5
WHI
GRN
GRY
BALLAST 1
J1-8
BLK
TAN
RED
WHI
BLK
BLK
RED/BLK
J1-5
J1-1 J2-5
J2-1 J3-5
J3-1
SWITCH
SWITCH
SWITCH
BOARD
BOARD
BOARD
46
42032 072513
SCHEMATIC WIRING DIAGRAM
iMIX-3
L1
LIMIT
THERMOSTAT
TRIAC
BLK-16
BLU-16
GRN
TANK HEATER
BLK-16
L2
N
RED-16 (3-WIRE MODELS)
WHI-16 (3-WIRE MODELS)
WHI
FAN
BLK
BLK
BLK
OVERFLOW
PROTECTION SW
RED
BLK
WHI
M
REFILL VALVE
WHI
SOL
RED
HOT WATER
WHI
SOL
GRY
J1-8
J1-5
J1-1
TAN
RED
WHI
BLK
(OPTIONAL)
AUGER #1
J3-1
RED
BLK
RED
BLK
J3-5
BLK
J3-1
J1-3
GRN
J10-1
J3-10
BRN/BLK
WHI
TAN
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#1
SOL
M
WHIPPER #1
M
DISPENSE VALVE #1
1 HOPPER EMPTY
DETECT SENSOR
#1
1
BLK
RED
RED
BLK
J1-1
J2-1
RED
BRN/WHI
GRN
RED
BLK
J10-5
J3-14
J4-1
J10-10
YEL
YEL
J4-5
GRN
WHI
RED
BLK
BLK
WHI
120V : 24V AC
TRANSFORMER
YEL
YEL
YEL
YEL
RED
BLK
BEEPER
WHI
WHI
BLK
1
J2-1
J2-5
J8-1
J12-1
RED
WHI
RED
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#2
SOL
M
WHIPPER #2
M
DISPENSE VALVE #2
1 HOPPER EMPTY
DETECT SENSOR
#2
J4-14
J5-1
J5-5
J5-10
AUGER #3
WHI/ORN
GRN
RED
BLK
ORN
WHI
ORN
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#3
SOL
M
WHIPPER #3
M
DISPENSE VALVE #3
1 HOPPER EMPTY
DETECT SENSOR
#3
J5-14
TOUCHPAD
J12-5
RUN
RINSE
ON
GRN
OFF
J12-10
GRN
WHI/YEL
WHI/GRN
WHI/BLU
J11-1
J11-4
J12-16
RED
ORN
BLU
WHI
J10-1
J10-4
J1-5
NIGHT
J9-7
120 VOLTS AC - 2 WIRE
120/208-240 VOLTS AC - 3 WIRE
SINGLE PHASE, 60HZ
J9-1
DISPLAY BOARD
J1-1 J2-5
J2-1 J3-5
J3-1
BLU
YEL
ORN
BLK
RED
PROBE
BLU
YEL
ORN
BLK
RED
GRN
WHI/VIO
PROGRAM
BLU
YEL
ORN
BLK
RED
t
PNK
GRN
BLK
J9-5
J4-10
CONTROL CIRCUIT BOARD #1
MEMORY
BOARD
J9-1
AUGER #2
WHI/RED
GRN
RED
BLK
J1-5
J1-1 J2-5
J2-1 J3-5
J3-1
SWITCH
SWITCH
SWITCH
BOARD
BOARD
BOARD
37478.0010A 03/13 ©2013 BUNN-O-MATIC CORPORATION
47
42032 072513
SCHEMATIC WIRING DIAGRAM
iMIX-3A
L1
BLK
WHI
GRN
L2
EMI
FILTER
WHI
LIMIT
THERMOSTAT
TRIAC
BLK
BLK-16
THERMAL
SAFETY FUSE
BLK-16
TANK HEATER
THERMAL
SAFETY FUSE
WHI
FAN
BLK
BLK
BLK
REFILL VALVE
OVERFLOW
PROTECTION SW
RED
BLK
WHI
M
WHI
SOL
RED
HOT WATER
WHI
SOL
GRN/BLK
BLK
BALLAST 2
BLK
BLK
BLK
BLK
(OPTIONAL)
J1-5
J1-1
BLU/BLK
RED/WHI
WHI
GRN/WHI
WHI
BLU/WHI
WHI
GRN
J10-1
J10-5
J4-1
4
GRN
1
WHI
WHI
WHI/RED
WHI/GRN
J3-10
J4-5
J10-10
J4-10
RED
BLK
RIGHT
LAMP ASSY.
BLK
WHI
240V : 24V AC
TRANSFORMER
YEL
YEL
RED
BLK
BEEPER
WHI
WHI
BLK
BRN/BLK
WHI
TAN
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#1
SOL
M
WHIPPER #1
M
DISPENSE VALVE #1
1 HOPPER EMPTY
DETECT SENSOR
#1
PNK
GRN
BLK
1
J9-5
J2-1
J2-5
J8-1
J12-1
AUGER #2
WHI/RED
GRN
RED
BLK
RED
WHI
RED
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#2
SOL
M
WHIPPER #2
M
DISPENSE VALVE #2
1 HOPPER EMPTY
DETECT SENSOR
#2
J4-14
J5-1
J5-5
J5-10
AUGER #3
WHI/ORN
GRN
RED
BLK
ORN
WHI
ORN
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#3
SOL
M
WHIPPER #3
M
DISPENSE VALVE #3
1 HOPPER EMPTY
DETECT SENSOR
#3
J5-14
TOUCHPAD
J12-5
RUN
ON
GRN
OFF
J12-10
GRN
WHI/YEL
WHI/GRN
WHI/BLU
J11-1
J11-4
J12-16
J10-1
J9-7
J10-4
J1-5
NIGHT
230 VOLTS AC &
240 VOLTS AC - 2 WIRE
SINGLE PHASE, 50HZ
37478.0001C 09/07
RED
ORN
BLU
WHI
J9-1
DISPLAY BOARD
J1-1 J2-5
J2-1 J3-5
J3-1
BLU
YEL
ORN
BLK
RED
RINSE
BLU
YEL
ORN
BLK
RED
GRN
PROBE
WHI/VIO
PROGRAM
BLU
YEL
ORN
BLK
RED
t
J9-1
CONTROL CIRCUIT BOARD #1
GRN
WHI
MEMORY
BOARD
LEFT LAMP
ASSY.
BRN/WHI
GRN
RED
BLK
J3-14
RED/WHI
GRN/WHI
BLU/WHI
GRN
RED/BLK
GRN/BLK
BLU/BLK
4
1
AUGER #1
J3-1
J3-5
WHI
GRN
GRY
BALLAST 1
J1-8
BLK
TAN
RED
WHI
BLK
BLK
RED/BLK
J1-5
J1-1 J2-5
J2-1 J3-5
J3-1
SWITCH
SWITCH
SWITCH
BOARD
BOARD
BOARD
©2004 BUNN-O-MATIC CORPORATION
48
42032 072513
SCHEMATIC WIRING DIAGRAM
iMIX-4/iMIX-5
L1
LIMIT
THERMOSTAT
TRIAC
BLK-16
BLK-16
GRN
TANK HEATER
BLK-16
L2
N
RED-16 (3-WIRE MODELS)
WHI-16 (3-WIRE MODELS)
WHI
FAN
BLK
BLK
BLK
OVERFLOW
PROTECTION SW
RED
BLK
WHI
M
REFILL VALVE
WHI
SOL
RED
HOT WATER
WHI
SOL
GRN/BLK
BLK
BALLAST 2
BLK
BLK
BLK
BLK
BLK
BLU/BLK
RED/WHI
WHI
GRN/WHI
WHI
BLU/WHI
WHI
USED ON
iMIX-4
MODELS
ONLY
J4-1
J4-5
J10-10
J4-10
GRN
WHI
MEMORY
BOARD
RED
BLK
J9-1
C
O
N
T
R
O
L
C
I
R
C
U
I
T
B
O
A
R
D
#
1
J9-5
RIGHT
LEFT LAMP CENTER LAMP
ASSY.
LAMP ASSY.
ASSY.
BLK
WHI
120V : 24V AC
TRANSFORMER
YEL
YEL
RED
BLK
BEEPER
t
J2-1
J2-5
J5-1
J5-5
J5-10
GRN
PROBE
J6-1
J8-1
J6-10
J12-5
RUN
WHI/VIO
PROGRAM
RINSE
GRN
OFF
1 HOPPER EMPTY
DETECT SENSOR
#1
AUGER #2
WHI/RED
GRN
RED
BLK
RED
WHI
RED
WHI
BLK
GRN
J7-1
J7-5
J12-16
NIGHT
J7-10
J11-4
TOUCHPAD
SOL
M
WHIPPER #2
M
DISPENSE VALVE #2
1 HOPPER EMPTY
DETECT SENSOR
#2
AUGER #3
ORN
WHI
ORN
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#3
SOL
M
WHIPPER #3
M
DISPENSE VALVE #3
1 HOPPER EMPTY
DETECT SENSOR
#3
AUGER #4
WHI/YEL
GRN
RED
BLK
YEL
WHI
YEL
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#4
SOL
M
WHIPPER #4
M
DISPENSE VALVE #4
1 HOPPER EMPTY
DETECT SENSOR
#4
NOT USED ON iMIX-4 MODELS
WHI/BLU
GRN
RED
BLK
BLU
WHI
BLU
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#5
SOL
AUGER #5
M
WHIPPER #5
DISPENSE VALVE #5
M
1 HOPPER EMPTY
DETECT SENSOR
#5
J7-14
RED
ORN
BLU
WHI
J11-1
AUGER MOTOR
SPEED SENSOR
1
#2
WHI/ORN
GRN
RED
BLK
J6-14
J12-10
GRN
WHI/YEL
WHI/GRN
WHI/BLU
ON
M
DISPENSE VALVE #1
J5-14
J12-1
PNK
GRN
BLK
1
SOL
M
WHIPPER #1
J4-14
J6-5
WHI
WHI
BLK
BRN/BLK
WHI
TAN
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#1
J3-14
J10-5
4
1
BRN/WHI
GRN
RED
BLK
GRN
WHI
WHI
WHI
GRN
WHI/RED
WHI/GRN
WHI/BLU
J3-10
J10-1
RED/WHI
GRN/WHI
BLU/WHI
GRN
RED/BLK
GRN/BLK
BLU/BLK
4
AUGER #1
J3-1
J3-5
BLK
WHI
GRN
1
J1-5
J1-1
BLK
BALLAST 3
GRY
BALLAST 1
J1-8
BLK
TAN
RED
WHI
BLK
BLK
RED/BLK
(OPTIONAL)
J9-7
J9-1
J10-1
J10-4
DISPLAY BOARD
J5-1
120 VOLTS AC - 2 WIRE
120/208-240 VOLTS AC - 3 WIRE
SINGLE PHASE, 60HZ
BLU
YEL
ORN
BLK
RED
J4-1 J5-5
BLU
YEL
ORN
BLK
RED
J3-1 J4-5
BLU
YEL
ORN
BLK
RED
J2-1 J3-5
BLU
YEL
ORN
BLK
RED
J1-1 J2-5
BLU
YEL
ORN
BLK
RED
J1-5
J1-5
J1-1 J2-5
J2-1 J3-5
J3-1 J4-5
J4-1 J5-5
J5-1
SWITCH
SWITCH
SWITCH
SWITCH
SWITCH
BOARD
BOARD
BOARD
BOARD
BOARD
37262.0001B 01/05
©2004 BUNN-O-MATIC CORPORATION
NOT USED ON
iMIX-4 MODELS
49
White Strip-Tac Plus
42032 060109
SCHEMATIC WIRING DIAGRAM
iMIX-4/iMIX-5
L1
LIMIT
THERMOSTAT
TRIAC
BLK-16
BLK-16
GRN
TANK HEATER
BLK-16
L2
N
RED-16 (3-WIRE MODELS)
WHI-16 (3-WIRE MODELS)
WHI
FAN
BLK
BLK
BLK
OVERFLOW
PROTECTION SW
RED
BLK
WHI
M
REFILL VALVE
WHI
SOL
RED
HOT WATER
WHI
SOL
BLK
RED
J3-1
J2-1
USED ON
iMIX-4
MODELS
ONLY
BLK
1
RED
J1-1
GRY
J10-1
RED
J1-3
AUGER #1
J3-1
J3-5
RED
BLK
RED
BLK
RED
BLK
BLK
J1-8
J1-1
J1-5
RED
WHI
BLK
BLK
(OPTIONAL)
J3-10
GRN
J4-5
GRN
WHI
J9-1
J4-10
J9-5
BLK
WHI
J2-1
YEL
YEL
YEL
YEL
J2-5
RED
BLK
CONTROL CIRCUIT BOARD #1
RED
BLK
BEEPER
t
J5-1
J5-5
J5-10
GRN
PROBE
J6-1
J8-1
J6-10
J12-5
RUN
WHI/VIO
PROGRAM
RINSE
GRN
OFF
DETECT SENSOR
#1
AUGER #2
WHI/RED
GRN
RED
BLK
RED
WHI
RED
WHI
BLK
GRN
J7-1
J7-5
J12-16
NIGHT
J7-10
J11-4
SOL
M
WHIPPER #2
M
DISPENSE VALVE #2
1 HOPPER EMPTY
DETECT SENSOR
#2
AUGER #3
ORN
WHI
ORN
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#3
SOL
M
WHIPPER #3
M
DISPENSE VALVE #3
1 HOPPER EMPTY
DETECT SENSOR
#3
AUGER #4
WHI/YEL
GRN
RED
BLK
YEL
WHI
YEL
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#4
SOL
M
WHIPPER #4
M
DISPENSE VALVE #4
1 HOPPER EMPTY
DETECT SENSOR
#4
NOT USED ON iMIX-4 MODELS
WHI/BLU
GRN
RED
BLK
BLU
WHI
BLU
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#5
SOL
AUGER #5
M
WHIPPER #5
DISPENSE VALVE #5
M
1 HOPPER EMPTY
DETECT SENSOR
#5
J7-14
RED
ORN
BLU
WHI
J11-1
TOUCHPAD
AUGER MOTOR
SPEED SENSOR
1
#2
WHI/ORN
GRN
RED
BLK
J6-14
J12-10
GRN
WHI/YEL
WHI/GRN
WHI/BLU
ON
1 HOPPER EMPTY
J5-14
J12-1
PNK
GRN
BLK
1
M
DISPENSE VALVE #1
J4-14
J6-5
WHI
WHI
BLK
SOL
M
WHIPPER #1
J3-14
J10-10
120V : 24V AC
TRANSFORMER
BRN/BLK
WHI
TAN
WHI
BLK
GRN
AUGER MOTOR
SPEED SENSOR
1
#1
J10-5
J4-1
MEMORY
BOARD
BRN/WHI
GRN
RED
BLK
J9-7
J9-1
J10-1
J10-4
DISPLAY BOARD
J5-1
BLU
YEL
ORN
BLK
RED
J4-1 J5-5
BLU
YEL
ORN
BLK
RED
J3-1 J4-5
BLU
YEL
ORN
BLK
RED
J2-1 J3-5
BLU
YEL
ORN
BLK
RED
J1-1 J2-5
BLU
YEL
ORN
BLK
RED
J1-5
J1-5
J1-1 J2-5
J2-1 J3-5
J3-1 J4-5
J4-1 J5-5
J5-1
SWITCH
SWITCH
SWITCH
SWITCH
SWITCH
BOARD
BOARD
BOARD
BOARD
BOARD
120 VOLTS AC - 2 WIRE
120/208-240 VOLTS AC - 3 WIRE
SINGLE PHASE, 60HZ
37262.0011A 01/13
©2013 BUNN-O-MATIC CORPORATION
NOT USED ON
iMIX-4 MODELS
50
42032 072513
51
42032 060109
INPUT/OUTPUT CHART
for IMIX-3S+ & 5S+
iMIX-3S+/5S+ I/O 38831.####
Values
Pin
J1-1
J1-2
J1-3
J1-4
J1-5
J1-6
J1-7
J1-8
J1-9
J1-10
Application IMIX
Program connector
Program connector
Program connector
Program connector
Program connector
Program connector
Program connector
Program connector
Program connector
Program connector
Type
J2-1
J2-2
J2-3
J2-4
J2-5
J2-6
Auger 1
Auger 2
Auger 3
Auger 4
Auger 5
Ground
Output
Output
Output
Output
Output
Gnd
0 to 24 VDC
0 to 24 VDC
0 to 24 VDC
0 to 24 VDC
0 to 24 VDC
DC ground
Adjustable to change dispense rate
Adjustable to change dispense rate
Adjustable to change dispense rate
Adjustable to change dispense rate
Adjustable to change dispense rate
Self explanatory
J3-1
J3-2
J3-3
J3-4
Display board
Display board
Display board
Display board
I/O
GRND
I/O
Output
Comm
GRND
Comm
+8 VDC
Communication
GRND
Communication
Display power supply
J4-1
J4-2
J4-3
J4-4
J4-5
J4-6
J4-7
J4-8
J4-9
J4-10
J4-11
J4-12
J4-13
J4-14
J4-15
J4-16
J4-17
J4-18
J4-19
J4-20
J4-21
J4-22
J4-23
J4-24
N/A
Dispense/Whipper 1
Dispense/Whipper 2
Dispense/Whipper 3
Dispense/Whipper 4
Dispense/Whipper 5
N/A
Temp Sensor
Level Probe
N/A
Temp Sensor
Rinse position
Inlet
Safety in
L1
Neutral/L2
Dispense/Whipper
Dispense/Whipper
N/A
N/A
Ground
N/A
Run Position
Level Probe
N/A
Output
Output
Output
Output
Output
N/A
GRND
GRND
N/A
Input
Input
Output
Input
Input
Input
Output
Output
N/A
N/A
grnd
N/A
Input
signal
N/A
L1
L1
L1
L1
L1
N/A
GND
GND
N/A
0 to 5 VDC
0VDC in rinse
120 VAC
L1
120 VAC
N or 120VAC
N or L2
N or L2
N/A
N/A
grnd
N/A
0VDC in run
Low AC
N/A
activated with dispense
activated with dispense
activated with dispense
activated with dispense
activated with dispense
N/A
J5-1
J5-2
J5-3
J5-4
J5-5
Transformer
Transformer
N/A
Transformer
Transformer
Output
Output
N/A
Input
Input
120 VAC
0 or 120VAC
N/A
24 VAC
24 VAC
L1
N or L2
N/A
Supplies power for board operation
Supplies power for board operation
52
N/A
Monitors tank temperature
Signals rinse position from rinse run switch
Inlet activated with refill circuit
Float switch supplies refill only
Self explanatory
Nuetral or second leg
Nuetral or second leg
Nuetral or second leg
N/A
N/A
Ground for rinse/run switch
N/A
Signals run position from rinse run switch
Monitors tank level
42032 060109
AUGER
#5
#1 DISPENSE
SWITCH
M
M
M
M
J6-7
M
J3-1
J3-6
#3 DISPENSE
SWITCH
J5-5
J5-1
J2-6
J2-1
J5-1
C
O
N
T
R
O
L
C
I
R
C
U
I
T
B
O
A
R
D
#5 DISPENSE
SWITCH
J5-4
BLU/BLK-16
BLK-16
COM
N.O.
NOT USED ON
IMIX-3S+ MODELS
#4 DISPENSE
SWITCH
YEL
YEL
BLK
WHI
BRN/WHI
WHI/RED
WHI/ORN
WHI/YEL
WHI/BLU
GRN
AUGER
#1
DISPLAY BOARD
TOUCHPAD
J6-1
AUGER
#2
120V : 24V AC
TRANSFORMER
AUGER
#3
#2 DISPENSE
SWITCH
AUGER
#4
J3-1
NOT USED ON
IMIX-3S+ MODELS
TAN
RED
ORN
YEL
GRN
BLK
J3-4
RED
ORN
BLU
WHI
53
42032 060109
J4-24
J4-20
J4-15
J4-10
J4-5
J4-1
WHI/VIO
PNK
GRN
WHI
WHI/YEL
GRY
RED
BLK
WHI
WHI
WHI
BLK
GRN
BRN/BLK
RED
ORN
YEL
PROBE
M
WHIPPER
#3
M
BLU
YEL
ORN
RED
WHI
BLK
1
WHI/YEL
RINSE
RUN
WHI/VIO
PROGRAM
WHIPPER
#5
M
M
WHIPPER
#2
WHIPPER
#4
M
WHIPPER
#1
SOL
SOL
SOL
SOL
SOL
BRN/BLK
BLK
GRY
RED
BLK
WHI
BLK
BALLAST
#1
M
FAN
RED/WHI
GRN/WHI
BLK-16
TANK HEATER
BLK
BLK
L1
©2006 BUNN-O-MATIC CORPORATION
LAMP
#1
GRN/BLK
BLK
LIMIT
THERMOSTAT
LAMP
#2
RED/BLK
BLK
RED
BLU/BLK-16
GRN
OVERFLOW
PROTECTION SW
RED
SOL
BLK-16
RED
GRY
REFILL VALVE
38986.0000D 04/09
BALLAST
#2
BLK
NOT USED ON
IMIX-3S+ MODELS
120 VOLTS AC - 2 WIRE
SINGLE PHASE, 60HZ
t
GRN
WHI
WHI
DISPENSE
VALVE #5
WHI
WHI
DISPENSE
VALVE #4
WHI
WHI
DISPENSE
VALVE #3
WHI
WHI
DISPENSE
VALVE #2
WHI
WHI
DISPENSE
VALVE #1
SCHEMATIC WIRING DIAGRAM
IMIX-3S+ / IMIX-5S+
WHI
WHI
WHI
WHI
WHI
WHI
N
#1 DISPENSE
SWITCH
M
AUGER
#5
M
J1-1
J1-3
J6-7
M
RED
J3-1
BLK
M
AUGER
#2
M
J5-1
J5-5
YEL
YEL
YEL
YEL
#3 DISPENSE
SWITCH
J2-6
J2-1
BLK
WHI
BRN/WHI
WHI/RED
WHI/ORN
WHI/YEL
WHI/BLU
GRN
AUGER
#1
J3-6
J5-1
#5 DISPENSE
SWITCH
J5-4
NOT USED ON
IMIX-3S+ MODELS
#4 DISPENSE
SWITCH
DISPLAY BOARD
J6-1
J3-1
TOUCHPAD
120V : 24V AC
TRANSFORMER
AUGER
#3
#2 DISPENSE
SWITCH
AUGER
#4
NOT USED ON
IMIX-3S+ MODELS
RED
BLK
J3-4
BLK
J2-1
RED
1
TAN
RED
ORN
YEL
GRN
BLK
J3-1
RED
BLK
RED
BLK
54
BRN
ORN
BLU
WHI
BLU/BLK-16
BLK-16
J4-5
J4-1
J4-24
J4-20
J4-15
J4-10
COM
N.O.
WHI/VIO
PNK
GRN
WHI
WHI/YEL
GRY
RED
BLK
WHI
WHI
WHI
BLK
GRN
BRN/BLK
RED
ORN
YEL
PROBE
M
WHIPPER
#3
M
BLU
YEL
ORN
RED
WHI
BLK
1
WHI/YEL
RINSE
RUN
WHI/VIO
PROGRAM
WHIPPER
#5
M
M
WHIPPER
#2
WHIPPER
#4
M
t
GRN
WHI
WHI
DISPENSE
VALVE #5
WHI
WHI
DISPENSE
VALVE #4
WHI
WHI
DISPENSE
VALVE #3
WHI
WHI
DISPENSE
VALVE #2
WHI
WHI
DISPENSE
VALVE #1
GRY
RED
BLK
WHI
NOT USED ON
IMIX-3S+ MODELS
120 VOLTS AC - 2 WIRE
120/240 VOLTS AC - 3 WIRE
SINGLE PHASE, 60HZ
SOL
SOL
SOL
SOL
SOL
BRN/BLK
WHIPPER
#1
38986.0013A 03/13
RED
M
FAN
BLK-16
©2013 BUNN-O-MATIC CORPORATION
BLK
LIMIT
THERMOSTAT
BLK
BLK
L1
TANK HEATER
BLU/BLK-16
OVERFLOW
PROTECTION SW
RED
SOL
BLK-16
RED
GRY
REFILL VALVE
GRN
N L2
WHI
WHI
WHI
WHI
WHI-16 2W
SCHEMATIC WIRING DIAGRAM
IMIX-3S+ / IMIX-5S+
RED-16 3W
RED
BLK
NOT USED ON IMIX-3S+ MODELS
CONTROL CIRCUIT BOARD
42032 072513
AUGER
#5
M
#1 DISPENSE
SWITCH
M
M
M
J6-7
M
J3-1
J3-6
#3 DISPENSE
SWITCH
J5-5
J5-1
J2-6
J2-1
J5-1
BLU/BLK-16
C
O
N
T
R
O
L
C
I
R
C
U
I
T
B
O
A
R
D
#5 DISPENSE
SWITCH
J5-4
BLK-16
COM
N.O.
NOT USED ON
IMIX-3S+ & IMIX-3S+A MODELS
#4 DISPENSE
SWITCH
YEL
YEL
BLK
WHI
BRN/WHI
WHI/RED
WHI/ORN
WHI/YEL
WHI/BLU
GRN
AUGER
#1
DISPLAY BOARD
TOUCHPAD
J6-1
AUGER
#2
240V : 24V AC
TRANSFORMER
AUGER
#3
#2 DISPENSE
SWITCH
AUGER
#4
J3-1
NOT USED ON
IMIX-3S+ &
IMIX-3S+A MODELS
TAN
RED
ORN
YEL
GRN
BLK
J3-4
RED
ORN
BLU
WHI
55
42032 060109
J4-24
J4-20
J4-15
J4-10
J4-5
J4-1
WHI/VIO
PNK
GRN
WHI
WHI/YEL
GRY
RED
BLK
WHI
WHI
WHI
BLK
GRN
BRN/BLK
RED
ORN
YEL
PROBE
M
WHIPPER
#3
M
BLU
YEL
ORN
RED
WHI
BLK
1
WHI/YEL
RINSE
RUN
WHI/VIO
PROGRAM
WHIPPER
#5
M
M
WHIPPER
#2
WHIPPER
#4
M
WHIPPER
#1
SOL
SOL
SOL
SOL
SOL
BRN/BLK
t
GRY
RED
BLK
WHI
NOT USED
ON IMIX-3S+
MODELS
BLK
BLK
BLK
BALLAST
#1
BLK
BLK
BLK
BLU/BLK-16
WHI
EMI
FILTER
L1
GRN/WHI
LAMP
#1
GRN/BLK
RED/WHI
LAMP
#2
RED/BLK
BLK
M
FAN
WHI
WHI
WHI
WHI
LIMIT
THERMAL
THERMAL
THERMOSTAT
FUSE
FUSE
TANK HEATER
BLK-16
WHI
BLK-16
OVERFLOW
PROTECTION SW
RED
RED
SOL
REFILL VALVE
RED
GRY
GRN
38986.0001D 04/09 ©2006 BUNN-O-MATIC CORPORATION
BALLAST
#2
230 VOLTS AC - 2 WIRE
SINGLE PHASE, 50HZ
GRN
WHI
WHI
DISPENSE
VALVE #5
WHI
WHI
DISPENSE
VALVE #4
WHI
WHI
DISPENSE
VALVE #3
WHI
WHI
DISPENSE
VALVE #2
WHI
WHI
DISPENSE
VALVE #1
SCHEMATIC WIRING DIAGRAM
IMIX-3S+A / IMIX-5S+A
N
#1 DISPENSE
SWITCH
AUGER
#5
M
M
M
J6-7
M
J3-1
J3-6
#3 DISPENSE
SWITCH
J5-5
J5-1
J2-6
J2-1
J5-1
#4 DISPENSE
SWITCH
YEL
YEL
BLK
WHI
BRN/WHI
WHI/RED
WHI/ORN
WHI/YEL
WHI/BLU
GRN
AUGER
#1
DISPLAY BOARD
TOUCHPAD
J6-1
AUGER
#2
120V : 24V AC
TRANSFORMER
AUGER
#3
#2 DISPENSE
SWITCH
AUGER
#4
J3-1
M
TAN
RED
ORN
YEL
GRN
BLK
WHI
C
O
N
T
R
O
L
C
I
R
C
U
I
T
B
O
A
R
D
N.O.
K2
J4-24
J4-20
J4-15
J4-10
J4-5
J4-1
WHI/VIO
PNK
RED/BLK
GRN
BLK
GRN
WHI/BLK
WHI
WHI/YEL
GRY
RED
BLK
WHI
WHI
WHI
VIO
BRN/BLK
RED
ORN
YEL
VIO
GRN
PNK
HOT
PROBE
M
1
1
WARM
PROBE
WHI
BLK
WHI/BLK
RED/BLK
WHI/YEL
RINSE
SOL
SOL
SOL
SOL
SOL
GRN
PNK
BLU
YEL
ORN
RED
RUN
WHI/VIO
PROGRAM
WHIPPER
#5
M
M
WHIPPER
#3
WHIPPER
#4
M
M
WHIPPER
#2
WHIPPER
#1
BRN/BLK
t
HOT
t WARM
GRN
BLK
BLK
GRY
RED
BLK
WHI
BLK
BALLAST
#1
BLK
BLK
RED
GRY
RED
GRN
BRN/BLK
SOL
REFILL VALVE
WARM
LAMP
#1
GRN/WHI
M
COOLING
FAN
WARM
TANK HEATER
BRN/BLK
BLU-16
HOT
TANK HEATER
BLK
N
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
38986.0002B 04/09 ©2009 BUNN-O-MATIC CORPORATION
LAMP
#2
RED/WHI
GRN/BLK
M
FAN
7
FAN
SWITCH
L1
BLK
BLK-16
LIMIT
THERMOSTAT
BLK-16
6 BLU-16
K2
RED/BLK
BLK
8
8
BLU/BLK-16
LIMIT
THERMOSTAT
OVERFLOW
PROTECTION SW
RED
HOT
SOL
REFILL VALVE
VIO
LIQUID 1 BLK
LEVEL 2 WHI
3
BOARD
PNK-20
4
BALLAST
#2
BLK
120 VOLTS AC - 2 WIRE
SINGLE PHASE, 60HZ
WHI
WHI
DISPENSE
VALVE #5
WHI
WHI
DISPENSE
VALVE #4
WHI
WHI
DISPENSE
VALVE #3
WHI
WHI
DISPENSE
VALVE #2
WHI
WHI
DISPENSE
VALVE #1
SCHEMATIC WIRING DIAGRAM
IMIX5S+ - HOT & ICED
WARM
HEATER RELAY
#5 DISPENSE
SWITCH
J5-4
COM
BLU/BLK-16
BLK-16
J3-4
RED
ORN
BLU
WHI
56
42032 060109
#1 DISPENSE
SWITCH
M
AUGER
#5
M
J1-1
M
M
J6-7
M
J3-1
J3-6
YEL
YEL
#3 DISPENSE
SWITCH
J5-5
J5-1
J2-6
J2-1
J5-1
#4 DISPENSE
SWITCH
YEL
YEL
BLK
WHI
BRN/WHI
WHI/RED
WHI/ORN
WHI/YEL
WHI/BLU
GRN
AUGER
#1
DISPLAY BOARD
TOUCHPAD
J6-1
AUGER
#2
120V : 24V AC
TRANSFORMER
AUGER
#3
#2 DISPENSE
SWITCH
AUGER
#4
RED
J1-3
RED
J3-1
BLK
BLK
J2-1
RED
BLK
J3-1
1
TAN
RED
ORN
YEL
GRN
BLK
J3-4
WHI
BLU/BLK-16
BLK-16
K2
J4-24
J4-20
J4-15
J4-10
J4-5
J4-1
WHI/VIO
PNK
RED/BLK
GRN
BLK
GRN
WHI/BLK
WHI
WHI/YEL
GRY
RED
BLK
WHI
WHI
WHI
VIO
BRN/BLK
RED
ORN
YEL
VIO
GRN
PNK
HOT
PROBE
M
1
1
WARM
PROBE
WHI
BLK
WHI/BLK
RED/BLK
WHI/YEL
RINSE
SOL
SOL
SOL
SOL
SOL
GRN
PNK
BLU
YEL
ORN
RED
RUN
WHI/VIO
PROGRAM
WHIPPER
#5
M
M
WHIPPER
#3
WHIPPER
#4
M
M
WHIPPER
#2
WHIPPER
#1
BRN/BLK
t
HOT
t WARM
GRN
GRY
RED
BLK
WHI
BLK
BLK
RED
GRY
VIO
RED
GRN
8
8
M
FAN
7
FAN
SWITCH
SOL
REFILL VALVE
WARM
BRN/BLK
M
COOLING
FAN
WARM
TANK HEATER
BRN/BLK
BLU-16
HOT
TANK HEATER
BLK
N
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
WHI
38986.0012A 01/13 ©2013 BUNN-O-MATIC CORPORATION
K2
L1
BLK
BLK-16
LIMIT
THERMOSTAT
BLK-16
6 BLU-16
BLU/BLK-16
LIMIT
THERMOSTAT
OVERFLOW
PROTECTION SW
RED
HOT
SOL
REFILL VALVE
LIQUID 1
LEVEL 2 WHI
BOARD 3 PNK-20
4
120 VOLTS AC - 2 WIRE
SINGLE PHASE, 60HZ
WHI
WHI
DISPENSE
VALVE #5
WHI
WHI
DISPENSE
VALVE #4
WHI
WHI
DISPENSE
VALVE #3
WHI
WHI
DISPENSE
VALVE #2
WHI
WHI
DISPENSE
VALVE #1
SCHEMATIC WIRING DIAGRAM
IMIX5S+ - HOT & ICED
WARM
HEATER RELAY
#5 DISPENSE
SWITCH
J5-4
COM
RED
BLK
RED
BLK
RED
BLK
57
RED
ORN
BLU
WHI
N.O.
CONTROL CIRCUIT BOARD
42032 072513