POWDER
™
AUTO FILL
For CDS-2 & 3
DISCONTINUED VERSION
The information in this manual
is no longer current.
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
and the quickest way to obtain the catalog. Contact Bunn-O-Matic Corporation at 1-800-286-6070 to obtain a paper
copy of the required Illustrated Parts Catalog mailed via U.S. Postal Service.
29793.0000D 02/07 ©1999 Bunn-O-Matic Corporation
10. Slowly feed the door support arms through the slots located on the front of the Powder Auto-Fill.
11. Continue to slowly feed the door support arms through the slots until the magnet strikes on the back of the
door engage the magnets on the Powder Auto-Fill.
12. Locate the #8-32 x .375” truss head screws and brass spacers set aside earlier.
13. Place one brass spacer on each screw.
14. Insert one screw/spacer assembly through the door hinge, locating the spacer inside the hinge bushing and
threading the screw into the hinge mount on the Powder Auto-Fill cover. Repeat for other side.
15. Install PAF level probe (BOM #29728.1000) by sliding it into the notched area at the top rear of the CDS hop-
per. The probe should be firmly seated in the notch and touching the contact pin protruding from the front
of the CDS cooling drum mount.
NOTE: At this point, it is important that the CDS machine is fully assembled according to the instructions outlined
in the CDS Operating and Service Manual.
16. Place the assembled Powder Auto-Fill on top of a hopper of a fully assembled CDS machine, taking care to
align the Powder Auto-Fill guide rails over the rollers on the CDS.
17. Connect the Powder Auto-Fill power cord to the outlet located on the CDS auger motor cover.
18. Attach a flexible water line to the .25” flare fitting on the back panel of the Powder Auto-Fill.
NOTE: A water strainer assembly (BUNN-O-MATIC #23820.1000) should be installed in line prior to the flexible
water line.
USER NOTICES
Carefully read and follow all notices on the equipment and in this manual. They were written for your protection.
All notices are to be kept in good condition. Replace any unreadable or damaged labels.
This equipment must be installed to comply with the
Basic Plumbing Code of the Building Officials and
Code Administrators International, Inc. (BOCA) and
the Food Service Sanitation Manual of the Food and
Drug Administration (FDA). For models installed
outside the U.S.A., comply with the applicable
Plumbing /SanitationCode.
00656.0000
00986.0000
Push back until fully latched
before removing or manually
filling chilled product hopper.
34561.0000
29793 080102
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OPERATING INSTRUCTIONS
1. OntheCDScontrolpanel,makethefollowingswitch
9. AftercheckingtheCDSandPowderAuto-Fillset-up,
the 5 minute refill fault may be cleared by simply
opening and closing the Powder Auto-Fill door.
10. Once the product level in the CDS covers the au-
ger, make the following switch settings at the CDS
control panel:
settings:
a) POWER- “ON”
b) DAY/NIGHT- “DAY”
2. Pull the Powder Auto-Fill fully forward on its sup-
port rails and open the door.
3. Fill the Powder Auto-Fill product hopper as fol-
lows:
a) AUGER - “1”.
b) ICE/OFF/NO ICE - “ICE” or “NO ICE” as appropri-
ate for the granita product.
a) Pull the slide gate closed on the Powder Auto-Fill
product hopper elbow and remove the hopper from
the Powder Auto-Fill.
b) Remove the lid from the product hopper and fill
the hopper with a powdered granita mix.
c) Install the product hopper into the Powder Auto-
Fill. Insure hopper is fully seated behind retainer
plates.
11. From this point onward, the Powder Auto-Fill will
continue to automatically refill the CDS hopper,
maintaining the CDS product at an approximate 2
gallon level.
12. WhenthePowderAuto-Fillpowderlevelfallslow,the
door lamp will cycle ON and OFF, but will continue
to dispense product for a preset period. When this
period expires, the Powder Auto-Fill will continue
to cycle the door lamp ON and OFF and will stop
dispensing product.
d) Push the slide gate on the hopper ejector elbow
to the open position.
4. Place the ON/OFF switch at the Powder Auto-Fill
whipper panel to “ON”.
5. After allowing 5 seconds for the Powder Auto-Fill
to initialize, observe the door lamp. The door lamp
should not be lit. If the door lamp is lit, consult the
fault list located on the decal placed on the back of
the door. Clear the fault before proceeding.
13. To clear the low product fault, simply refill the
powder as follows:
a) Open the Powder Auto-Fill door.
b) Close the hopper slide gate.
c) Remove the product hopper.
d) Refill the product hopper with powdered granita
mix.
e) Replace the hopper.
f) Push the slide gate on the hopper ejector elbow
to the OPEN position.
NOTE: If the Powder Auto-Fill is being used for the first
time with the selected granita mix, perform an adjust-
ment as described in ADJUSTMENTS.
g) Close the Powder Auto-Fill door.
6. Close the Powder Auto-Fill door and observe the
following:
a) The door lamp lights steadily.
b) The Powder Auto-Fill begins dispensing liquid
granita product.
7. The Powder Auto-Fill will continue to fill the CDS
product hopper until the liquid level in the CDS
hopper reaches the product level probe or for 5
minutes, which ever occurs first.
8. If the Powder Auto-Fill fails to fill the CDS hopper
in 5 minutes, the following will occur:
a) The Powder Auto-Fill will stop dispensing prod-
uct.
b) The door lamp will flash 4 times about every 2
seconds.
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ADJUSTMENTS
When using the Powder Auto-Fill with a new powdered granita mix, follow the procedure outlined below to
adjust the Powder Auto-Fill to produce the correct recipe.
1. Determine the mix ratio of powdered granita mix.
Converttherecipesothatitisexpressedintermsof
weightunits[grams(g),dryounces(oz),orpounds
(lbs)] of powdered granita mix to fluid ounces (fl.
oz.) of water [1 gallon (gal) = 128 fl.oz.; 1 liter (l)
= 33.8 fl.oz.].
2. The delivery rate of the water ingredient is factory
preset to 1 fl.oz. per second. Therefore, it is only
necessary to adjust the delivery rate of the pow-
dered granita mix. Adjustment is accomplished as
follows:
i)Removetheholeplugonthewhipperpanel.Using
a screwdriver, set potentiometer to approximately
mid range.
j) Remove the mixing chamber from the Powder
Auto-Fill and place a small container, such as a cup,
under the product hopper ejector elbow.
k)Pushtheslidegateontheproducthopperejector
elbow to the OPEN position.
l) Momentarily set the TEST/SERVICE switch on
the whipper panel to the TEST position.
m) The hopper motor will run and dispense pow-
dered granita mix for 10 seconds.
n) After the Powder Auto-Fill has finished the 10
second throw test, weigh the dispensed product.
o) Determine the dispense rate of the powdered
product (weight units per second) by dividing the
measured weight by 10.
a) Place the Powder Auto-Fill on top of a fully
assembled CDS taking care to align the Powder
Auto-Fill guide rails over the rollers on the CDS
guide rails.
b) Connect the Powder Auto-Fill power cord to the
outlet located on the CDS auger motor cover.
c) Attach a flexible water line to the .25” flare fitting
on the back panel of the Powder Auto-Fill.
p) Compare the measured dispense rate with the
mix ratio in step 1.
q)AdjusttheMIN/MAXcontrolclockwisetoincrease
the dispense rate or counterclockwise to decrease
the dispense rate of the powdered granita mix.
r)Repeatstepslthroughqasnecessaryuntilproper
mix ratio is achieved.
s) Replace the mixing chamber removed in step j.
Replace hole plug.
NOTE: A water strainer assembly (BUNN-O-MATIC
#23820.1000) should be installed in line prior to the
flexible water line.
d) On the CDS control panel, make the following
switch settings:
i) POWER- “ON”
ii) DAY/NIGHT- “DAY”
e) Pull the Powder Auto-Fill fully forward on its
support rails
f) Fill the Powder Auto-Fill product hopper as fol-
lows:
3. Once the mix ratio has been adjusted, the Powder
Auto-Fill can be run with the door open to allow the
user to catch dispensed product for brix testing as
follows:
a) Hold a container under the dispense tip of the
Powder Auto-Fill.
i)PulltheslidegateclosedonthePowderAuto-
Fill product hopper elbow and remove the product
hopper from the Powder Auto-Fill.
ii) Remove the lid from the product hopper and
fill the hopper with a powdered granita mix.
iii) Install the product hopper into the Powder
Auto-Fill.
g) Place the ON/OFF switch at the Powder Auto-Fill
whipper panel to “ON”.
h)Afterallowing5secondsforthePowderAuto-Fill
to initialize, observe the door lamp on the whipper
panel. The door lamp should not be lit. If the door
lamp is lit, consult the fault list and clear the fault
before proceeding.
b) Hold the TEST/SERVICE switch on the whipper
panel to the SERVICE position.
c) When the container is filled to the desired level,
release the TEST/SERVICE switch.
d) Measure the brix using the appropriate measur-
ing device.
e) Remove the hole plug. Using a screwdriver,
adjust the potentiometer clockwise to increase the
brix or counterclockwise to decrease the brix of the
product. Replace the hole plug.
29793 061599
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CLEANING
RECOMMENDED DAILY CLEANING AND MAINTENANCE TIPS
This should be done in conjunction with the recommended weekly cleaning of your CDS-2 or CDS-3 machine.
Removing and cleaning the whipper chamber
(once a day):
1. Open the cabinet door.
2. Pull the mixing chamber out of the whipper cham-
ber.
3. Twist the whipper chamber clockwise and pull it off
the whipper chamber receptacle.
4. Pull the frother off the motor shaft. Notice the flat
keywayontheshaftandthematchingkeywayinside
the frother. It is important that these two keyways
are lined up when reassembling.
5. Twist the whipper chamber receptacle clockwise
and pull it off the motor shaft.
6. Slip the O-ring off the whipper chamber recep-
tacle.
7. Wash components in a mild solution of dish deter-
gent using a bristle brush.
Mixing Chamber
Whipper Chamber
Receptacle
O-ring
Frother
Dispense Tip
Whipper Chamber
8. Rinsethoroughlyandallowtodrybeforereinstalling
in the machine.
Wiper Blade
Shaft
Wiper Blade
Thorough cleaning of the hopper
(once a week):
Wiper Drive Gear
1. Open the cabinet door.
2. Removethehopper/baseassemblyfromthecabinet,
remove the cover and empty the contents.
3. Pull the ejector elbow off the hopper base; remove
the slide gate from the ejector elbow.
Retaining
Clip
4. Removethewiperbladeanddrivegearbyremoving
the retaining ring from the wiper blade shaft.
5. Remove the auger by pulling it out of the front
hopper base.
6. Remove the auger drive shaft by removing the
retaining clip from the auger drive shaft.
7. Wash components in a mild solution of dish deter-
gent using a bristle brush when needed.
8. Rinse and dry each item thoroughly before reas-
sembling.
Hopper Base
Auger Drive
Shaft
Auger Drive
Bracket
Retaining
Ring
Auger
Ejector Elbow
Slide Gate
NOTICE
The cleaning instructions noted above are for nondairy 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.
29793 061599
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FAULT LIST
Fault
Door Lamp
ON
Normal operation - Powder Auto-Fill ready to
dispense
Flashes ON/OFF at 50% duty cycle
Two flashes about every 2 seconds
Three flashes about every 2 seconds
Four flashes about every 2 seconds
OFF
Low product level in Powder Auto-Fill hopper
CDS/Powder Auto-Fill probe circuit open
Powder Auto-Fill hopper not in place
CDS refill exceeded 5 minutes
Door not closed
29793 061599
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TROUBLESHOOTING
A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems
encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic
Technical Service Department.
•
•
•
Inspection, testing, and repair of electrical equipment should be performed only by qualified service person-
nel.
All electronic components have 120 volt ac and 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.
•
•
Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are
energized for more than ten minutes without a supply of water.
The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will
help to avoid twists and kinks in the tubing.
•
•
Make certain that all plumbing connections are sealed and electrical connections tight and isolated.
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
PROBABLE CAUSE
PROBLEM
REMEDY
CDS and Powder Auto-Fill do not
run - Main power indicator on CDS
drawer front OFF
1. CDS power cord disconnected or Check that the power cord is con-
main power switch in 0 position.
nected to proper electrical source
and that the CDS main power switch
is in the 1 position.
Product level in CDS is lower than
level Probe - CDS running; Powder
Auto-Fill door lamp is OFF
1. TheCDSDAY/NIGHTswitchinthe 1. The CDS DAY/NIGHT switch
NIGHT position. should be in the DAY position.
2. The CDS DAY/NIGHT timer in the 2. Reprogram the CDS DAY/NIGHT
NIGHT position. timer.
3. Powder Auto-Fill power cord 3. Check that the Powder Auto-Fill
disconnected.
is plugged into the back of the CDS
auger motor cover.
4. Powder Auto-Fill main power 4. Select the ON position of the main
switch in OFF position.
power switch.
5. Powder Auto-Fill door is open.
5. The Powder Auto-Fill door should
be closed securely.
Product level in CDS is lower than
level Probe - CDS running; Powder
Auto-Fill door lamp flashes ON and
OFF
1. Low product in Powder Auto- Remove hopper and fill with pow-
Fill. dered mix.
29793 061599
8
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Product level in CDS is lower than 1. Powder Auto-Fill not pulled com- 1. Check that the Powder Auto-Fill
level Probe - CDS running; Powder pletely forward.
Auto-Fill door lamp flashes two
times
is pulled completely forward until
the guide rails roll into the indented
position.
2. CDS level probe misaligned.
2. Position the CDS level probe so
that it is located in the notch of the
CDShopperandtouchingthecontact
protrudingfromthefrontoftheCDS
cooling drum mount.
Product level in CDS is lower than 1. Powder Auto-Fill hopper not 1. Install the Powder Auto-Fill hop-
level Probe - CDS running; Powder installed.
Auto-Fill door lamp flashes three
per.
times
2. Powder Auto-Fill hopper not in- 2. Reposition the Powder Auto-Fill
stalled properly. hopper.
Product level in CDS is lower than 1. Refill time exceeded five min- Check that the SERVICE switch is
level Probe - CDS running; Powder utes.
Auto-Fill door lamp flashes four
times
released or reset by opening and
closing the Powder Auto-Fill door.
The CDS product tastes “watery” or 1. Improper adjustment of product Adjust the product mix ratio per
“sugary”
mix ratio.
instructions in Powder Auto-Fill
Adjustment. See page 5.
Powder Auto-Fill dispenses dry 1. Powder Auto-Fill not connected 1. Connect the Powder Auto-Fill to a
product only - dry powder build-up to water source.
in mixing and whipper chambers
20 to 90 psi (138 to 620 kPa)water
source.
2. Water source turned off.
2. Turn water source on.
3. Remove obstruction.
3. Water line obstructed.
29793 011500
9
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Powder Auto-Fill will not dispense 1. No water
product
Water lines and valves to the dis-
penser must be open and free of
obstructions.
2. No power or incorrect voltage to Check that the power cord is con-
the dispenser.
nected to the CDS dispenser and for
voltage from the CDS dispenser.
3. Dispense Solenoid Valve
RefertoService-DispenseSolenoid
Valve for testing procedures. See
page 32
4. Control Board and Probe
Refer to Service- Control Board and
Probe for testing procedures. See
page 18
5. Auger Drive
Refer to Service- Auger Drive for
testing procedures. See page 13
6. Transformer
Refer to Service- Transformer for
testing procedures. See page 26
7. Water Strainer (Optional)
A) Direction of flow arrow must be
pointing towards dispenser.
B)Removethestrainerandcheckfor
obstructions. Clear or replace.
Dripping from dispense tip
Water flows continuously
1. Dispense Solenoid Valve
1. Control Board and Probe
2. Dispense Solenoid Valve
Removedispensevalveandclearany
obstructions. Rebuild or replace the
valve if necessary. See page 32
Refer to Service- Control Board and
Probe for testing procedures. See
page 18
RefertoService-DispenseSolenoid
Valve for testing procedures. See
page 32
29793 061599
10
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Product overflows CDS hopper
1. Control Board and Probe
Refer to Service- Control Board and
Probe for testing procedures. See
page 18
2. Dispense Solenoid Valve
Refer to Service- Dispense Solenoid
Valve for testing procedures. See
page 32
Weak product
1. Whipper Motor
2. Frother
Refer to Service- Whipper Motor for
testing procedures. See page 16
Refer to Service- Frother for testing
procedures. See page 15
3. Dispense Solenoid Valve
Refer to Service- Dispense Solenoid
Valve for testing procedures. See
page 32
4. Auger Drive
5. Auger Spring
6. Auger Motor
Refer to Service- Auger Drive for
testing procedures. See page 13
Refer to Service- Auger Spring for
testing procedures. See page 13
Refer to Service- Auger Motor for
testing procedures. See page 14
7. Improper adjustment of product Set the product mix ratio per Adjust-
mix ratio
ments. See page 5
Dispenser is making unusual nois- 1. Plumbing lines
es
Plumbinglinesshouldnotberesting
on the counter top.
2. Water supply
A)Thedispensermustbeconnected
to a cold water line.
B) Water pressure to the dispenser
must not exceed 90 psi (620 kPa).
Install a regulator if necessary to
lower the working pressure to ap-
proximately 50 psi (345 kPa).
Display not lit
1. Lamp
Refer to Service- Lamp for testing
procedures. See page 25
2. Lamp Holder
Refer to Service- Lamp Holder for
testing procedures. See page 25
29793 011500
11
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
equipmentshouldbeperformedonlybyqualifiedservice
personnel. The dispenser should be unplugged when
servicing, except when electrical tests are required
and the test procedure specifically states to plug-in
the dispenser.
COMPONENT ACCESS
WARNING - Disconnect the dispenser from the power
source before the removal of any panel or the replace-
ment of any component.
All components are accessible by opening the door,
removal of the door panel, removal of the dispenser
rear panel, hopper, hopper support plate and top wrap-
around cover. Refer to Fig. 1
P1891
FIG. 1 COMPONENT LOCATIONS
Contents
Auger Drive Components......................................13
Auger Motor..........................................................14
Frother and Mixing/Whipper Chamber..................15
Whipper Motor......................................................16
Control Board and Level Probes............................18
TEST/SERVICE Switch ..........................................21
Main Power ON/OFF Switch..................................22
Door Panel Assembly
Lamp Cord Assembly......................................23
Lamp Cord Connector.....................................24
Lamp Holder/Socket .......................................25
Transformer ..........................................................26
Potentiometer .......................................................27
Hopper Level Indicator..........................................28
Hopper Switch ......................................................29
Door Switch..........................................................30
Pressure Regulator and Needle Valve ...................31
Dispense Solenoid ................................................32
Wiring Diagrams...................................................33
29793 061599
12
SERVICE (cont.)
AUGER DRIVE COMPONENTS
12. Rinse and dry each item thoroughly.
13. Checkfordamagedorbrokencomponents,replace
any if necessary and reassemble hopper assem-
bly.
14. Install hopper assembly in the dispenser by slid-
ing hopper assy on the hopper support plate (12)
until the hopper base (9) seats firmly behind the
retainer plates (16) on the hopper support plate
(12).
1
2
3
4
5
6
7
13
14
P1922
FIG. 2 AUGER DRIVE COMPONENTS
Location
The auger drive components are located in the bottom
of the hopper assembly.
8
9
20
15
10
11
17
21
Removal, Cleaning and Replacement
1. Open the dispenser door.
2. Lift the hopper assembly over the retainer plates
(16)onhoppersupportplate(12)andslidehopper
assembly out the front of the dispenser.
3. Remove hopper lid (1) and empty product.
4. Pullofftheejectorelbow(15)andremovetheslide
gate (21).
18
19
16
12
5. Remove retainer ring (11) and washer (10) from
the bottom of the hopper base (9).
6. Remove wiper shaft (3), wiper blade (4) and wiper
drive gear (5) from the hopper base (9).
7. Remove auger wire (14) by pulling it out the front
of the hopper base (9).
8. Remove auger drive shaft (13) by removing the
retaining clip (6) from auger drive shaft.
9. Slide spacer (8) and auger drive shaft bracket (7)
off of the auger drive shaft (13).
10. Remove auger drive shaft (13) from hopper base
(9).
P1894
FIG. 3 AUGER DRIVE & HOPPER ASSEMBLY
12. Hopper Support Plate
13. Auger Drive Shaft
14. Auger Wire
15. Ejector Elbow
16. Hopper Retainer Plates
17. Auger Motor Bracket
18. Auger Motor
1. Hopper Lid
2. Hopper
3. Wiper Shaft
4. Wiper Blade
5. Wiper Drive Gear
6. Retainer Clip
7. Auger Drive Bracket
8. Spacer
9. Hopper Base
10. Washer
11. Retainer Ring
19. Dust Seal
20. Auger Motor Mounting
panel
11. Wash components in a mild solution of dish de-
tergent using a bristle brush when needed.
21. Slide gate
29793 061599
13
SERVICE (cont.)
AUGER DRIVE MOTOR
Removal and Replacement:
1. Remove hopper assembly and set aside for reas-
sembly.
2. Remove six #8-32 screws securing the rear cover
and remove the rear cover.
3. Remove the four #8-32 screws located inside the
dispenser housing on the lower right front of the
auger motor mounting panel, securing the auger
motor mounting bracket and auger motor to the
rear of the auger motor mounting panel.
4 Disconnect the wires from the auger drive motor.
5. Remove the auger motor mounting bracket, auger
motor and dust seal as an assembly.
6. Remove the dust seal from the auger motor and
discard the motor.
7. Install dust seal on the new auger motor shaft and
align the notch in the seal with the motor casting.
8. Connect the wires from the auger motor to the
terminals in the main wiring harness. See Fig. 5.
9. Using four #8-32 screws, install the auger motor,
dust seal and mounting bracket to the rear of the
auger motor mounting panel.
P1922
FIG. 4 AUGER MOTOR
Location:
10. Install the hopper assembly.
11. Install the rear cover with six #8-32 screws.
The auger motor is located on the right rear of the
motor assembly mounting panel.
Test procedures:
1. Disconnect the dispenser from the power source.
2. Check the voltage across the positive (red wire)
terminal and the negative (black wire) terminal on
theaugermotorwithavoltmeter.Withthedispenser
door open and the product level in the CDS hopper
lower than the probe, press and hold the SERVICE
switch. Connect the dispenser to the power supply.
The indication must be 4.0 to 26.5 volts dc.
If voltage is present as described, the auger mo-
tor drive is operating properly. If auger does not turn,
replace the auger motor.
Ifvoltageisnotpresentasdescribed,refertowiring
diagrams and check wiring harness.
RED to Control
Board (J1-1)
BLK to GRN Wire
Main Harness to
Control Board (J1-7)
P1902
FIG. 5 AUGER MOTOR TERMINALS
29793 061599
14
SERVICE (cont.)
FROTHER AND MIXING/WHIPPER CHAMBER
10. Slide whipper chamber receptacle with seal (6) and
O-ring (4) on to the motor shaft.
11. Rotatethereceptaclewithseal(6)counterclockwise
untilitsnapsintoplaceonthemotormountingnuts
(7).
12. Push frother (5) onto the motor shaft, making sure
the flat in the frother (5) lines up with the flat on
the motor shaft.
13. Installwhipperchamber(3)onthewhipperchamber
receptacle (6) by twisting counterclockwise until
tabs on the whipper chamber (3) lock with the tabs
on the whipper chamber receptacle (6). Be sure
dispense port is pointing down.
14. Install dispense tip (2) into the bottom of the whip-
per chamber (3).
15. Slipthemixingchamber(1)ontothemixingchamber
water inlet tube far enough so the mixing chamber
(1) will seat inside the whipper chamber (3).
16. Install hopper assembly in the dispenser by slid-
ing hopper firmly behind the retainer plates on the
hopper support panel.
P1923
FIG. 6 FROTHER AND
MIXING/WHIPPER CHAMBER
Location:
The frother is located behind the dispenser door,
mounted on the front panel and inside the whipper
chamber.
Removal, Cleaning and Replacement:
1. Disconnect the dispenser from the power source.
2. Open the dispenser door and lift the front edge of
the hopper over the retainer plates on the hopper
support panel and slide the hopper assembly out
the front of the dispenser.
3. Pull the mixing chamber (1) out of the whipper
chamber (3).
4. Remove the dispense tip (2) and twist the whipper
chamber (3) clockwise and pull it off the whipper
chamber receptacle (6).
5. Pull the frother (5) 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.
9
8
7
6
5
4
1
3
2
6. Slip the O-ring (4) off the whipper chamber recep-
tacle (6).
7. Remove the receptacle by rotating clockwise until
the receptacle clears the nuts (7) and slide off the
motor shaft.
8. Wash components in a mild solution of dish deter-
gent using a bristle brush.
9. Rinsethoroughlyandallowtodrybeforereinstalling
in the dispenser.
P1895
FIG. 7 MIXING/WHIPPER CHAMBER
COMPONENTS
1. Mixing Chamber
6. Receptacle w/Seal
7. Nut
2. Dispense Tip
3. Whipper Chamber
4. O-Ring
8. Slinger
9. Motor Assembly
5. Frother
29793 061599
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SERVICE (cont.)
WHIPPER MOTOR
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Open the dispenser door and remove the hopper
assembly out the front of the dispenser.
3. Removethefour#8-32screwssecuringthehopper
support panel to the auger motor mounting panel
and the whipper motor mounting panel.
4. Slowly lift the hopper support panel up and discon-
nect the red/black and green wires from the hopper
switch.
5. Pull the mixing chamber out of the whipper cham-
ber.
6. Twist the whipper chamber clockwise and pull it off
the whipper chamber receptacle.
7. Pull the frother 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.
8. Slide the receptacle with seal off of the motor
shaft.
P1924
FIG. 8 WHIPPER MOTOR
NOTE: To remove the receptacle only, rotate clockwise
until the receptacle clears the nuts and slide off of the
motor shaft.
Location:
The whipper motor is located on the back side of
the whipper motor mounting panel.
9. Slide the slinger off of the motor shaft.
10. Removethetwonutssecuringthewhipperchamber
receptacle and whipper motor to the front panel.
11. Disconnect the black leads on the motor from the
white/redandwhite/brownwiresofthemainwiring
harness and remove the motor.
12. Install new motor on rear of front panel and secure
with two nuts. Connect the black leads from the
motor to the main wiring harness. Refer to Fig. 9
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Disconnect the white/red and white/brown wires
of the main wiring harness from the black leads of
the whipper motor.
3. With the CDS hopper level lower than the probe,
press and hold the SERVICE switch and check the
voltageacrossthedisconnectedharnesswireswith
a voltmeter. Connect the dispenser to the power
source. The indication must be:
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt CE models.
4. Disconnect the dispenser from the power source.
If voltage is present as described, replace the motor.
Ifvoltageisnotpresentasdescribed, refertothewiring
diagrams and check the dispenser wiring harness.
29793 011500
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SERVICE (cont.)
WHIPPER MOTOR (cont.)
21. Install dispense tip into the bottom of the whipper
chamber.
22. Slip the mixing chamber onto the mixing chamber
water inlet tube far enough so the mixing chamber
will seat inside the whipper chamber.
23. Install hopper assembly in the dispenser by slid-
ing hopper assembly on the hopper support panel
until the slot in the bottom rear of the hopper seats
against the pin and retainer plates on the hopper
support panel.
when reconnecting wires.
13. Slide the slinger onto the motor shaft flush against
the front panel.
14. Wash whipper chamber components in a mild
solution of dish detergent using a bristle brush.
15. Rinsethoroughlyandallowtodrybeforereinstalling
in the dispenser.
16. Slide whipper chamber receptacle with seal and
O-ring onto the motor shaft.
17. Rotate the receptacle with seal counterclockwise
until it snaps into place on the motor mounting
nuts.
18. Push frother onto the motor shaft, making sure the
flat in the frother lines up with the flat on the motor
shaft.
19. Connectthered/blackandgreenwirestothehopper
switch, Fig.10 and install the hopper support panel
using the four #8-32 screws.
20. Install whipper chamber on the whipper chamber
receptacle by twisting counterclockwise until tabs
on the whipper chamber lock with the tabs on the
whipperchamberreceptacle.Besuredispenseport
is pointing down.
GRN to Control Boad (J1-8)
RED/BLK to Control Board (J1-10)
P1904
FIG. 10 HOPPER SWITCH TERMINALS
BLK
WHI/RED to Control Board (J7-2)
WHI/BRN to Control Board (J7-4)
P1903
FIG. 9 WHIPPER MOTOR TERMINALS
29793 061599
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8. Selectthe“OFF”positionofthemainpowerswitchand
disconnect the dispenser from the power source.
SERVICE (cont.)
CONTROL BOARD and LEVEL PROBE
If voltage is present as described, proceed to #9.
If voltage is not present as described refer to the wiring
diagram and check the dispenser wiring harness.
9. Reconnectthefourpinconnectortothecontrolboard
(J7).
10. Disconnect the twelve pin connector (J1) from the
control board.
11. Measure the resistance between pins 8 & 12 of the
twelve pin connector on the wiring harness using
an ohmmeter. The indication must be between 298k
ohms and 304k ohms.
If the resistance measures as described, proceed to
#12.
P1925
FIG. 11 CONTROL BOARD
Location:
The control board is located behind the rear panel,
mounted on the back side of the hopper motor mount-
ing panel.
If the resistance does not measure as described, refer
to the wiring diagram and check the dispenser wiring
harness.
12. Carefully connect a piece of insulated jumper wire
to the level probe contact pin (pink wire) located at
the lower left rear of the dispenser.
Test Procedure:
Liquid Level Control
13. Check the voltage across the terminals, first of the
dispense solenoid and then of the hopper motor
with a voltmeter. Connect the dispenser to the power
sourceandselectthe“ON”positionofthemainpower
switch. The indication must be:
1. Disconnect the dispenser from the power source.
2. Disconnect the twelve pin connector (J1) from the
control board.
3. Checkthevoltageacrosspins2&3ofthetwelvepin
connector on the wiring harness with a voltmeter.
Connect the dispenser to the power source and
select the “ON” position of the main power switch.
The indication must be 24 volts ac.
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt CE models.
at the dispense solenoid and between 4 and 26 volts
dcatthehoppermotorafteradelayofapproximately
10 seconds.
4. Select the “OFF” position of the main power switch
and disconnect the dispenser from the power
source.
14. Touchthefreeendofthejumperwiretothedispenser
housing.Theindicationmustbe0(zero)afteradelay
of up to 5 seconds.
15. Move the jumper wire away from the housing. The
indication must again be:
If voltage is present as described, proceed to #5.
Ifvoltageisnotpresentasdescribed, refertothewiring
diagram and check the dispenser wiring harness.
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt CE models.
at the dispense valve solenoid and between 4 and
26 volts dc at the hopper motor after a delay of up
to 5 seconds.
5. Reconnect the twelve pin connector to the control
board (J1).
6. Disconnect the four pin connector (J7) from the
control board.
7. Check the voltage across pins 1 & 3 of the four pin
connector on the wiring harness with a voltmeter.
Connect the dispenser to the power source and
select the “ON” position of the main power switch.
The indication must be:
16. Disconnect the dispenser from the power source,
remove the jumper wire, and select the “OFF” posi-
tion on the main power switch.
Ifvoltageispresentasdescribed, Theliquidlevelcontrol
circuitry is operating properly.
If voltage is not present as described, replace the control
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt CE models.
board.
29793 011500
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If voltage is present as described, proceed to #12.
If voltage is not present as described, replace the photo
transistor.
SERVICE (cont.)
CONTROL BOARD and LEVEL PROBE (cont.)
Test Procedure:
Low Product Detect
12. Check the voltage across pins 1 (positive) & 3
(negative) of the four pin connector on the control
board with a voltmeter. Remove the hopper from
the dispenser, connect the dispenser to the power
source and select the “ON” position of the main
power switch. Shine a flashlight on the photo
transistor (left side panel). The indication must be
less than 1 volt dc.
1. Disconnect the dispenser from the power source.
2. Disconnect the twelve pin connector (J1) from the
control board.
3. Checkthevoltageacrosspins2&3ofthetwelvepin
connector on the wiring harness with a voltmeter.
Connect the dispenser to the power source and
select the “ON” position of the main power switch.
The indication must be 24 volts ac.
13. Disconnect the dispenser from the power source
and select the “OFF” position on the main power
switch.
4. Select the “OFF” position of the main power switch
and disconnect the dispenser from the power
source.
If voltage is present as described, proceed to #14.
If voltage is not present as described, replace the photo
transistor.
If voltage is present as described, proceed to #5.
Ifvoltageisnotpresentasdescribed, refertothewiring
diagram and check the dispenser wiring harness.
14. Disconnect the two pin connector (J2) from the
control board.
5. Reconnect the twelve pin connector to the control
board (J1).
6. Disconnect the four pin connector (J6) from the
control board.
7. Check the voltage across pins 1 (positive) & 3
(negative) of the four pin connector on the control
board with a voltmeter. Connect the dispenser to
the power source and select the “ON” position of
the main power switch. The indication must be +5
volts dc.
8. Select the “OFF” position of the main power switch
and disconnect the dispenser from the power
source.
15. Check the voltage across pins 1 (positive) & 2
(negative) of the two pin connector on the control
board with a voltmeter. Connect the dispenser to
the power source and select the “ON” position of
themainpowerswitch. Theindicationmustbe+1.5
volts dc.
16. Select the “OFF” position of the main power switch
and disconnect the dispenser from the power
source.
If voltage is present as described, proceed to #17.
If voltage is not present as described, replace the
control board.
If voltage is present as described, proceed to #9.
If voltage is not present as described, replace the
control board.
17. Check the photo LED forward and reverse bias us-
ing a diode tester. The photo LED must be forward
biased with positive applied to pin 1 of the two pin
connector and negative applied to pin 2 of the two
pin connector. The photo LED must be reverse
biased with negative applied to pin 1 of the two pin
connector and positive applied to pin 2 of the two
in connector.
9. Reconnect the four pin connector to the control
board (J6).
10. Checkthevoltageacrosspins1(positive)&3(nega-
tive) of the four pin connector on the control board
withavoltmeter.Placeafullhopperinthedispenser,
connect the dispenser to the power source, select
the “ON” position on the main power switch, and
close the dispenser door. The indication must be
+5 volts dc.
11. Disconnect the dispenser from the power source,
remove the jumper wire, and select the “OFF” posi-
tion on the main power switch.
If the photo LED biasing checks as described, the low
level detect circuitry is operating properly.
If the photo LED biasing does not check as described,
replace the photo LED.
NOTE: The photo LED lights in the infrared spectrum
and is not visible to the human eye.
29793 061599
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SERVICE (cont.)
CONTROL BOARD and LEVEL PROBE (cont.)
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Remove the two plugs (J1 and J7) from the main
wiring harness, the potentiometer plug (J3), the
photo transistor plug (J6), and the photo LED plug
(J2) from the control board.
J7
J1
J3
3. Removethefour#6-32kepsnutssecuringthecon-
trol board to the hopper motor mounting panel.
4. Remove the control board.
5. Removethefourspacersfromtheoldcontrolboard
and install them into the new control board.
6. Instal the new control board using the four #6-32
keps nuts.
J2
J6
7. Reconnect the two plugs (J1 and J7) from the
main wiring harness, the potentiometer plug (J3),
the photo transistor plug (J6), and the photo LED
plug (J2) to the control board. Refer to Fig. 12.
P1905
FIG. 12 CONTROL BOARD WIRING
29793 061599
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SERVICE (cont.)
TEST/SERVICE SWITCH
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Open the dispenser door and remove the hopper
assembly out the front of the dispenser.
3. Removethefour#8-32screwssecuringthehopper
support panel to the auger motor mounting panel
and the whipper motor mounting panel.
4. Slowly lift the hopper support panel up and discon-
nect the red/black and green wires from the hopper
switch.
5. Remove the facenut securing the TEST/SERVICE
switch the whipper motor mounting panel.
6. Remove switch with wires attached from the back
side of the whipper motor mounting panel.
7. Disconnect the wires from the switch and discard
the switch.
P1923
8. Refer to Fig. 14 when connecting the wires to the
new switch.
FIG. 13 TEST/SERVICE SWITCH
9. Install new switch with wires attached through the
holeinthewhippermountingpanelandsecurewith
facenut.
10. Connectthered/blackandgreenwirestothehopper
switch. See Fig. 10 on page 17.
Location:
The TEST/SERVICE switch is located on the
left front of the whipper motor mounting panel.
11. Install the hopper support panel to the auger motor
mounting panel and the whipper motor mounting
panel using the four #8-32 screws.
Test Procedure:
1. Disconnect the dispenser from the power
source.
12. Install the hopper assembly.
2. Disconnect the wires from the switch terminals.
3. Check for continuity between the center terminal
and upper terminal with switch in the SERVICE
position (lower). Check for continuity between
the center terminal and the lower terminal with
the switch in the TEST position (upper). Continu-
ity must not be present when the switch is in the
center position.
WHI/ORN from Control
Board J1-6
GRN from Control
Board J1-8
BLU/BLK from Control
Board J1-11
If continuity is present as described, the switch is
operating properly.
If continuity is not present as described, replace the
switch.
P1906
FIG. 14 TEST/SERVICE SWITCH
TERMINALS
29793 061599
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SERVICE (cont.)
MAIN POWER ON/OFF SWITCH
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Open the dispenser door and remove the hopper
assembly out the front of the dispenser.
3. Removethefour#8-32screwssecuringthehopper
support panel to the auger motor mounting panel
and the whipper motor mounting panel.
4. Slowly lift the hopper support panel up and discon-
nect the red/black and green wires from the hopper
switch.
5. Remove the switch mounting nut on the front of
the whipper motor mounting panel.
6. Remove switch with wires attached from the rear
of the whipper motor mounting panel.
7. Remove the wires from the switch terminals and
discard switch.
8. Connect the wires to the new switch, refer to Fig.
16.
9. Pushnewswitchthroughholeinthewhippermotor
mounting panel and secure with face nut.
10. Connectthered/blackandgreenwirestothehopper
switch. See Fig. 10 on page 17.
11. Install the hopper support panel to the auger motor
mounting panel and the whipper motor mounting
panel using the four #8-32 screws.
P1923
FIG. 15 MAIN POWER ON/OFF SWITCH
Location:
The main power switch is located inside the dis-
penser on the right of the whipper motor mounting
panel.
12. Install the hopper assembly.
BLK from Power
Cord
BLK from Main
Harness
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Disconnect the black wires from the main wiring
harness.
3. With the switch in the ON (lower) position check
for continuity between the center and the upper
terminal. With the switch in the OFF (upper) posi-
tionnocontinuityshouldbepresentbetweencenter
and upper terminals.
P1907
FIG. 16 MAIN POWER ON/OFF
SWITCH TERMINALS
If continuity is present as described, the main power
switch is operating properly.
If continuity is not present as described, replace the
switch.
29793 061599
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SERVICE (cont.)
LAMP CORD ASSEMBLY
1. Disconnect the lamp cord assembly from the
lamp cord connector assembly in the top of the
dispenser.
2. Openthedispenserdoorandremovethefivescrews
securing the rear cover to the door.
3. Disconnect the lamp cord assembly from the lamp
holder/socket assembly and set the rear panel
aside.
4. Cut the terminals off of the lamp cord assembly.
5. Remove lamp cord assembly from the door as-
sembly and discard.
6. Push new lamp cord wires through the holes on
the top of the door assembly.
7. Strip the wires from the new lamp cord approxi-
mately .281”.
8. Using the two terminals supplied, crimp the new
terminals to the lamp cord assembly and connect
them to the lamp holder/socket assembly wires.
9. Reinstall the rear panel to the door assembly.
10. Close the door.
11. Plug-in the new lamp cord assembly to the lamp
cord connector assembly on top of the dispenser.
12. Refer to Fig. 18 when reconnecting the wires.
P1891
FIG. 17 LAMP CORD ASSY
Location:
The lamp cord assembly is located in the top of
the dispenser.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Unplug the lamp cord assembly from lamp cord
connector assembly.
3. Check for continuity across the tip of the cord as-
sembly and the housing. Continuity must not be
present when the lamp is removed.
BLK to WHI
at Lamp Holder
If continuity is present as described, the cord assembly
is operating properly.
If continuity is not present as described, replace the
cord assembly.
BLK to BLK
at Lamp Holder
Removal and Replacement:
P1926
FIG. 18 LAMP CORD WIRES
29793 061599
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SERVICE (cont.)
LAMP CORD CONNECTOR
If continuity is present as described, the lamp cord
connector is operating properly.
If continuity is not present as described, replace the
lamp cord connector.
Removal and Replacement:
1. Disconnect the lamp cord assembly from the lamp
cord connector.
2. Remove the six #8-32 screws securing the rear
cover to the dispenser.
3. Disconnect the lamp cord connector wires from
the dispenser main wiring harness.
4. Remove nut and washer securing the lamp cord
connector to the dispenser. Remove and set aside
theinsulatingwashersanddiscardnut, washerand
lamp cord connector.
P1923
FIG. 19 LAMP CORD CONNECTOR
5. Remove new nut and washer from new lamp cord
connector.
Location:
The lamp cord connector is located on top of the
dispenser.
6. Install the insulating washers to the hole in the top
of the dispenser. Push new lamp cord connector
through the holes in the insulating washers and
secure with the new nut and washer.
7. Reconnect the wires on the cord connector to the
dispenser main wiring harness.
8. Connect the lamp cord to the lamp cord connec-
tor.
9. Install the rear cover to the dispenser and secure
with six #8-32 screws.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the lamp cord from the lamp cord con-
nector.
3. Disconnect the plug on the dispenser main harness
from the connector from the lamp cord connector.
4. Check the voltage across the two pin holes on the
main harness plug with a voltmeter and Day/Night
switchinthe“DAY”positionandthe“ON/OFF” switch
in the “ON” position. Verify that the dispenser hop-
per is full and in place, the dispenser probe contact
is making contact with the CDS liquid level probe,
and the dispenser door is closed. Connect the dis-
penser to the power source. The indication must be
approximately 12.6 volts ac.
5. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to #6.
If voltage is not present as described, refer to the wiring
diagram and check the dispenser main wiring harness.
6. Check for continuity between pin 1 (red) of the lamp
cord connector and the center terminal of the lamp
cord connector. Check for continuity between pin 2
(black)ofthelampcordconnectorplugandthelamp
cord connector body. Check for continuity between
pins 1 & 2 of the lamp cord connector plug. Continu-
ity must not be present between pins 1 & 2.
To Main Harness
P1928
FIG. 20 LAMP CORD CONNECTOR
29793 061599
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If continuity is present as described, the lamp is op-
erating properly.
SERVICE (cont.)
LAMP HOLDER/SOCKET ASSEMBLY
If continuity is not present as described, replace the
lamp.
Removal and Replacement:
1. Disconnect the lamp cord assembly from the
lamp cord connector assembly in the top of the
dispenser.
2. Remove the display graphic from the dispenser
door.
3. Open the dispenser door.
4. Remove the five #6-32 screws securing the rear
door cover to the door.
5. Carefully lower the rear door cover and disconnect
the lamp holder/socket assembly from the lamp
cord terminals.
6. Remove the lamp.
P1927
7. Remove #2-56 screw and elastic lock nut securing
the lamp holder/socket assembly to the mounting
bracket. Remove the lamp holder/socket assembly
and discard.
8. Installnewlampholder/socketassemblyonmount-
ing bracket using the #2-56 screw and lock nut.
9. Reinstall lamp.
10. Connect the new lamp holder/socket assembly to
the lamp cord terminals.
11. Reinstall the rear door cover to the dispenser
door. Make sure wires are located in notch in door
flange.
FIG. 21 LAMP HOLDER/SOCKET ASSEMBLY
Location:
The lamp holder/socket assembly is located inside
the dispenser door.
Test Procedures:
1. Disconnect the lamp cord from the lamp cord
connector.
2. Remove the lamp from the lamp holder/socket as-
sembly.
3. Check the voltage across the two pin holes on the
lamp holder/socket assembly with a voltmeter
and Day/Night switch in the “DAY” position and
the ON/OFF switch in the “ON” position. Verify
that the dispenser hopper is full and in place, the
dispenser probe contact is making contact with the
CDS liquid level probe, and the dispenser door is
closed. Reconnect the lamp cord to the lamp cord
connector. The indication must be approximately
12.6 volts ac.
12. Close the dispenser door.
13. Plug-in the lamp cord assembly to the lamp cord
connector assembly on top of the dispenser.
14. Refer to Fig. 22 when reconnecting the wires.
BLK to BLK
at Lamp Cord
4. Disconnect the lamp cord from the lamp cord
connector.
If voltage is present as described, the lamp holder/
socket assembly is operating properly.
If voltage is not present as described, replace the lamp
holder/socket assembly
5. Check for continuity across the terminals on the
lamps.
P1929
FIG. 22 LAMP HOLDER/SOCKET
ASSEMBLY WIRES
29793 022007
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SERVICE (cont.)
TRANSFORMER
5. Check the voltage between J1-2 and J1-3 on the
twelve pin connector at the control board. Connect
the dispenser to the power source. The indication
must be 24 volts ac.
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. Remove the hopper from the dispenser.
2. Removethefour#8-32screwssecuringthehopper
support panel to the dispenser.
3. Disconnect the red/black and green wires from the
hopper switch and set the hopper support panel
aside.
4. Disconnectthetransformerfourpinconnectorfrom
the four pin plug on the main wiring harness.
5. Remove the two #6-32 keps nuts securing the
transformer to the dispenser base. Remove and
discard the transformer.
P1930
FIG. 23 TRANSFORMER
Location:
Thetransformerislocatedunderthehoppersupport
panel mounted to the left of the whipper motor.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the four pin connector from the main
wiring harness from the four pin connector on the
transformer.
3. Check the voltage across the black wire (pin 1) and
the white wire (pin 2) on the plug from the main
wiringharness. Connectthedispensertothepower
source. The indication must be:
6. Install the new transformer on the dispenser base
and secure with two #6-32 keps nuts.
7. Connect the four pin connector on the transformer
to the four pin plug on the main wiring harness.
8. Reconnect the red/black and green wires to the
hopper switch. See Fig. 10 on page 17.
9. Install the hopper support panel and secure with
four #8-32 screws.
a) 120 volts ac for 120 volt models.
10. Install the hopper assembly.
b) 230 volts ac for 230 volt CE models.
4. Disconnect the dispenser from the power source.
If voltage is present as described, reconnect the plug
and the connector and proceed to #5.
Ifvoltageisnotpresentasdescribed, refertothewiring
diagrams and check the main wiring harness.
29793 011500
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SERVICE (cont.)
POTENTIOMETER
If the resistance measures as described, proceed to
#7.
If resistance does not measure as described, replace
the potentiometer assembly.
7. Adjust the potentiometer fully counterclockwise.
8. Check resistance between pins 1 & 2 of the potenti-
ometerconnectorwithanohmmeter.Theindication
must be between 800 and 1200 ohms. Check the
resistance between pins 2 & 3 of the potentiometer
connector with an ohmmeter. The indication must
be less than 20 ohms.
If the resistance measures as described, the potenti-
ometer is operating properly.
If resistance does not measure as described, replace
the potentiometer assembly.
P1931
FIG. 24 POTENTIOMETER
Removal and Replacement:
Location:
1. Disconnect the dispenser from the power source.
2. Remove the six #8-32 screws securing the rear
panel to the dispenser.
3. Disconnect the three pin connector (J3) from the
control board.
4. Open the dispenser door and remove the #8-32
screwsecuringthepotentiometermountingbracket
to the whipper motor mounting panel.
5. Remove the potentiometer and mounting bracket
as an assembly.
Thepotentiometerislocatedunderthehoppersup-
port panel mounted to the left of the whipper motor and
mounted on a bracket. Adjustments can be made by
removing the 0.50” plug located on the whipper motor
mounting panel.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Remove the six #8-32 screws securing the rear
cover to the dispenser housing.
6. Remove the facenut and locking washer securing
the potentiometer to the bracket.
3. Disconnect the three pin connector (J3) from the
control board.
7. Install the new potentiometer to the mounting
bracket using the locking washer and facenut.
8. Install the potentiometer and bracket assembly to
the whipper motor panel and secure with #8-32
screw.
9. Connect the three pin connector (J3) to the control
board.
4. Check the resistance between pins 1 & 3 of the
potentiometer connector using an ohmmeter. The
indication must be between 800 and 1200 ohms.
If the resistance measures as described, proceed to
#5.
If resistance does not measure as described, replace
the potentiometer assembly.
10. Installtherearpaneltothehousingandsecurewith
six #8-32 screws.
5. Adjust the potentiometer fully clockwise.
6. Check resistance between pins 2 & 3 of the potenti-
ometerconnectorwithanohmmeter.Theindication
must be between 800 and 1200 ohms. Check the
resistance between pins 1 & 2 of the potentiometer
connector with an ohmmeter. The indication must
be less than 20 ohms.
29793 061599
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SERVICE (cont.)
HOPPER LEVEL INDICATOR
7. Remove the six #8-32 round head screws securing
the front of the housing to the side panels.
8. Remove the six #8-32 truss head screws securing
the back of the housing to the side panels.
9. Carefully lift and spread the housing to remove it
from the rest of the dispenser.
Photo LED
10. Disconnect the photo transistor (J6) or LED (J2)
plug from the control board.
11. Cut the cable tie securing the cable assembly to the
cable tie mount.
12. Gently pull the photo transistor or LED from its
mounting lens.
13. Pull the photo transistor or LED through the grom-
met and free of the dispenser.
14. Snap the photo transistor or LED into the mount-
ing lens and feed the cable end through the grom-
met.
15. Gently bend the cable flush to the cable tie mount
and secure with new cable tie. Cut away excess
cable tie.
16. Connect the photo transistor (J6) or LED (J2) plug
to the control board.
17. Reassemble the dispenser top housing, rear panel,
and door assembly to the dispenser.
18. Reconnect the dispenser to the power source and
the water supply.
Photo Transistor
P1932
FIG. 25 HOPPER LEVEL INDICATOR
Location:
The photo transistor and LED are located on the
hopper side panels mounted just below the hopper
guide rails.
Test Procedures:
Refer to the section CONTROL BOARD and LEVEL
PROBE for test procedures.
Removal and Replacement:
1. Disconnect the dispenser from the power source
and the water supply.
2. Remove the dispenser from the CDS machine and
place it on a flat work surface.
3. Disconnect the door lamp cord from the lamp con-
nector.
4. Remove the two #8-32 screws securing the door
hinge to the dispenser housing.
5. Carefully pull the door forward until the door sup-
port arms come completely out of the dispenser
housing and set aside.
6. Remove the six #8-32 truss head screws securing
the rear cover to the dispenser housing.
29793 061599
28
SERVICE (cont.)
HOPPER SWITCH
7. Disconnect the wires from the hopper switch.
8. Check continuity between the N.O. and COM. ter-
minals of the hopper switch using an ohmmeter.
Continuity must be present when the actuator is
engaged. Continuity must not be present when
actuator is released.
If continuity is present as described, refer to wiring
diagram and check the dispenser wiring harness.
If continuity is not present as described, replace the
hopper switch.
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Open the dispenser door and remove the hopper.
3. Removethefour#8-32screwssecuringthehopper
support panel.
4. Carefully lift the hopper support panel, remove
the wires from the hopper switch, and remove the
hopper support panel.
P1933
FIG. 26 HOPPER SWITCH
Location:
The hopper switch is located under the hopper
support panel.
5. Notingtheorientationoftheswitch,removethetwo
#4-40 screws, lockwashers and nuts securing the
switch to the panel.
6. Attach the new switch to the panel taking care to
orientitproperlyandsecurewithtwo#4-40screws,
lockwashers and nuts.
7. Manually engage and release the hopper switch
actuator. The actuator must operate smoothly
without binding at either end of its travel. If the
actuator operates as described, proceed to #8. If
the actuator does not operate as described, loosen
the two screws and realign the switch and repeat
the process.
8. Refer to Fig. 27 and reconnect the wires.
9. Install the hopper support panel and secure with
four #8-32 screws.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Open the dispenser door and remove the hopper.
3. Manually engage and release the hopper switch
actuator. The actuator must operate smoothly
without binding at either end of its travel and an
audible click must be detected near the mid point
of travel.
If the actuator operates as described, proceed to #4.
If the actuator does not operate as described, loosen
thehopperswitchmountingscrews,realigntheswitch,
and repeat the process. If the audible click cannot be
detected, proceed to #4.
4. Disconnect the twelve pin connector (J1) from the
control board.
5. Check continuity between pins 8 & 10 on the
harness using an ohmmeter. Continuity must be
present when the hopper is correctly installed.
Continuity must not be present when the hopper
is removed.
6. Reconnect the twelve pin connector (J1) to the
control board.
GRN to Control Boad (J1-8)
If continuity is present as described, the hopper switch
P1904
is operating properly.
RED/BLK to Control Board (J1-10)
If continuity is not present as described, proceed to
#7.
FIG. 27 HOPPER SWITCH TERMINALS
29793 061599
29
Removal and Replacement:
SERVICE (cont.)
DOOR SWITCH
1. Disconnect the dispenser from the power source.
2. Remove the hopper assembly from the dispenser.
3. Remove the dispenser from the CDS machine and
place it on a flat work surface.
4. Disconnect the door lamp cord from the lamp con-
nector.
5. Remove the two #8-32 screws securing the door
hinge to the dispenser housing.
6. Carefullypullthedoorforwarduntilthedoorsupport
arms come completely out of the dispenser housing
and set aside.
7. Remove the six #8-32 truss head screws securing
the rear cover to the dispenser housing.
8. Remove the six #8-32 round head screws securing
the front of the housing to the side panels.
9. Remove the six #8-32 truss head screws securing
the back of the housing to the side panels.
10. Carefully lift and spread the housing to remove it
from the rest of the dispenser.
11. Remove the door switch actuator from the nylon
standoff.
12. Notingtheorientationofthedoorswitch, removethe
two#6-32screwsandthenylonstandoffsecuringthe
switch mounting bracket to the dispenser housing.
Remove the switch.
13. Attach the new door switch taking care to orient the
switchcorrectlyinthemountingbracketandsecurein
place with two #6-32 screws and nylon standoff.
14. Reconnect the wires to the door switch. Refer to Fig.
29.
15. Installthedoorswitchactuatororientingthenotched
side against the right side housing panel. Refer to
Fig. 28.
P1934
FIG. 28 DOOR SWITCH
Location:
The door switch is located on the right side panel
under the housing top cover.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the twelve pin connector (J1) from the
control board.
3. Check continuity between pins 8 & 9 on the wiring
harness using an ohmmeter. Continuity must be
present when the door is closed. Continuity must
not be present when the door is open.
4. Reconnect the twelve pin connector to the control
board.
16. Reassemble the dispenser top housing, rear panel,
and door assembly to the dispenser.
5. Gain access to the door switch using steps listed
in Removal and Replacement.
6. Disconnect the wires from the door switch.
7. Check continuity between the N.O. and COM. ter-
minalsoftheswitchusinganohmmeter. Continuity
must be present when the actuator is engaged.
Continuity must not be present when the actuator
is released.
ORA to Control
Board (J1-9)
GRN to Control
Board (J1-8)
If continuity is present as described, refer to wiring
diagram and check the dispenser wiring harness.
If continuity is not present s described, replace the
door switch.
P1908
FIG. 29 DOOR SWITCH TERMINALS
29793 061599
30
SERVICE (cont.)
PRESSURE REGULATOR and NEEDLE VALVE
3. Disconnect the .25” copper tube from the outlet of
the pressure regulator.
4. Loosen the nut securing the bulkhead fitting to the
dispenser.
5. Remove the bulkhead fitting from the inlet to the
pressure regulator.
6. Remove the pressure regulator assembly.
7. Attach the regulator to the bulkhead fitting making
sure that the copper bushing is seated properly in
the regulator and tighten securely.
8. Tighten the nut securing the bulkhead fitting to the
dispenser housing.
9. Attach the .25” copper tube to the regulator as-
sembly and tighten securely.
10. Connect the dispenser to the water source and
check for leaks. Tighten any leaking connections
before installing rear panel.
P1935
FIG. 30 PRESSURE REGULATOR
and NEEDLE VALVE
Removal and Replacement:
Location:
Needle Valve
Thepressureregulatorandneedlevalvearelocated
inside the rear panel at the bottom of the dispenser.
1. Disconnect the dispenser from the power source
and the water supply.
2. Remove the six #8-32 screws securing the rear
panel to the dispenser housing.
3. Disconnect the .25” copper tube from the inlet fit-
ting on the needle valve.
4. Disconnect the water outlet from the solenoid
valve.
5. Remove the solenoid valve and needle valve as
described in section- Dispense Solenoid Valve.
6. Remove the needle valve assembly. Remove the
fitting from the inlet port of the needle valve.
7. Install the fitting removed from the old needle valve
onto the new needle valve using pipe thread sealant
(BOM #M2526.0000).
Adjustments:
Thewaterpressureregulatorispresetatthefactory
to produce 15 psi (103 kPa) of water pressure at the
regulator outlet with inlet pressures ranging from 20
psi to 90 psi (138 to 620 kPa). No field adjustments of
the pressure regulator should ever be necessary.
The needle valve is preset at the factory to dispense
1 fluid ounce of water per second. The dispenser is
designed to accommodate various product mix ratios
by adjusting the product dispense rate (see Initial
Setup). Should a readjustment of the water dispense
rate become necessary, proceed as follows:
8. Attachtheneedlevalvetothefittingonthedispense
solenoid valve using pipe thread sealant (BOM
#M2526.0000) and tighten securely.
9. Install the solenoid valve and needle valve as de-
scribed in section- Dispense Solenoid Valve.
10. Attach water inlet and outlet lines and tighten se-
curely.
1. Disconnect the dispenser from the power source.
2. Remove the six #8-32 screws securing the rear
panel to the dispenser housing.
3. Turn the needle valve adjustment screw coun-
terclockwise to increase the water flow rate, and
clockwise to decrease the water flow rate.
11. Connect the dispenser to the water source and
check for leaks. Tighten any leaking connections
before installing rear panel.
Removal and Replacement:
Pressure Regulator
1. Disconnect the dispenser from the power source
and the water supply.
2. Remove the six #8-32 screws securing the rear
panel to the dispenser housing.
29793 011500
31
SERVICE (cont.)
DISPENSE SOLENOID VALVE
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 block-
age in the water line before the solenoid valve or, the
solenoid valve may require inspection for wear and the
removal of waterborne particles.
If the sound is not heard as described, replace the
solenoid valve.
Removal and Replacement:
1. Disconnect the dispenser from the power source
and the water supply.
2. Remove the six #8-32 screws securing the rear
panel to the dispenser.
3. Remove the white/red and white/brown wires from
the solenoid valve.
P1935
4. Disconnect the water lines to and from the solenoid
valve.
5. Remove the two #8-32 nuts securing the solenoid
mounting bracket to the dispenser base. Remove
the solenoid and bracket assembly.
6. Remove the two #10-32 screws and lockwashers
securing the solenoid valve to the bracket.
7. Install a new solenoid valve to the bracket using
two #10-32 screws and lockwashers.
8. Install the solenoid and bracket to the base and
secure with two #8-32 nuts.
9. Installthewaterlinestoandfromthesolenoidvalve
usingpipethreadsealant(BOM#M2526.0000)and
tighten securely.
FIG. 31 DISPENSE SOLENOID VALVE
Location:
The dispense solenoid valve is located on the left
side of the dispenser base inside of the rear cover.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the white/red and white/brown wires
from the solenoid valve.
3. Check the voltage across the white/red and white/
brownwireswithavoltmeter.Connectthedispenser
to the power source. The indication must be: a) 120
volts ac for 120 volt models.
b) 230 volts ac for 230 volt CE models.
4. Disconnect the dispenser from the power source.
10. Refer to Fig. 32 when reconnecting the wires.
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to wiring
diagrams and check the dispenser wiring harness.
WHI/RED to Control
Board (J7-2)
WHI/BRN to Control
Board (J7-4)
5. Check for continuity across the solenoid valve coil
terminals.
If continuity is present as described, reconnect the
white/red and white/brown wires to the solenoid.
If continuity is not present as described, replace the
solenoid valve.
6. Checkthesolenoidvalveforcoilaction.Connectthe
dispenser to the power source. Press the dispense
switch and listen carefully for a “clicking” sound as
the magnet attracts.
P1909
FIG. 32 DISPENSE SOLENOID TERMINALS
29793 011500
32
WIRING DIAGRAMS
SCHEMATIC WIRING DIAGRAM PAF
L1
N
GRN
MAIN POWER
SWITCH
BLK
BLK
WHI/BLK
WHI/GRN
WHI
WHIPPER
MOTOR
120V : 24V AC
TRANSFORMER
WHI/RED
WHI/BRN
M
BLK
DISPENSE
SOLENOID
HOPPER
MOTOR
SOL
BLK
RED
4
1
M
BLK
WHI
J1
DOOR
LAMP
J7
J2
J6
BLK
RED
WHI/GRN
WHI/BLK
GRY
1
5
1
WHI/RED
WHI
WHI/BRN
C
O
N
T
BLK-22
RED-22
2
4
1
BLK BLK
BLK
VIO
1
WHI/ORN
GRN
GRN
ORN
RED/BLK
BLU/BLK
WHI
BLK
BLK
R
O
L
TEST/SERVICE
SWITCH
P
C
B
O
A
R
D
10
WHI/ORN
WHI
BLK
SERVICE
1
4
GRN
PNK
BLU/BLK
MOTOR
LOW PRODUCT
DETECT
TEST
SPEED ADJUST
J3
GRN
BLK
RED
CW
1
3
HOPPER
SWITCH
RED/BLK
GRN
GRN
P
DOOR
SWITCH
R
O
B
E
ORN
120 VOLTS AC - 2 WIRE
SINGLE PHASE, 60 HZ
29793 022007
33
WIRING DIAGRAMS
SCHEMATIC WIRING DIAGRAM PAFA
L1
L2
GRN/YEL
BRN
MAIN POWER
SWITCH
BLU
BLK
BLK
WHI/BLK
WHI/GRN
WHI
WHIPPER
MOTOR
230V : 24V AC
TRANSFORMER
WHI/RED
WHI/BRN
M
BLK
DISPENSE
SOLENOID
HOPPER
MOTOR
SOL
GRN
BLK
RED
4
1
M
BLK
WHI
J1
DOOR
LAMP
J7
J2
J6
BLK
RED
WHI/GRN
WHI/BLK
GRY
1
5
1
WHI/RED
WHI
WHI/BRN
C
O
N
T
BLK-22
RED-22
2
4
1
BLK BLK
BLK
VIO
1
WHI
BLK
WHI/ORN
GRN
GRN
ORN
RED/BLK
BLU/BLK
BLK
R
O
L
TEST/SERVICE
SWITCH
P
C
B
O
A
R
D
10
WHI/ORN
WHI
BLK
SERVICE
1
4
GRN
PNK
BLU/BLK
MOTOR
LOW PRODUCT
DETECT
TEST
SPEED ADJUST
J3
GRN
BLK
RED
CW
1
3
HOPPER
SWITCH
RED/BLK
GRN
GRN
P
DOOR
SWITCH
R
O
B
E
ORN
230 VOLTS AC - 2 WIRE
SINGLE PHASE, 50 HZ
29793 022007
34
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