Vollrath U431-I2 Service Manual

Model U431 I2

OWNERS MANUAL

Manual No. 513660 March 2011

Owner’s Manual

For U431 I2 Series

Combination Soft Serve/Shake

Pressure Machine

This manual provides basic information about the machine. Instructions and suggestions are
given covering its operation and care.

The illustrations and specifi cations are not binding in detail. We reserve the right to make
changes to the machine without notice, and without incurring any obligation to modify or pro­vide new parts for machines built prior to date of change.

DO NOT ATTEMPT to operate the machine until instructions and safety precautions in this
manual are read completely and are thoroughly understood. If problems develop or questions
arise in connection with installation, operation, or servicing of the machine, contact the com­pany at the following location:

STOELTING Ph: 800-558-5807
502 Hwy. 67
Kiel, WI 53042 Fax: [phone]

© 2011 Stoelting, LLC, All Rights Reserved

A Few Words About Safety

Safety Information

Read and understand the entire manual before
operating or maintaining Stoelting equipment.

This Manual provides the operator with information
for the safe operation and maintenance of Stoelt­ing equipment. There are hazards associated with
the operation of this machine. For this reason safety
is emphasized throughout the manual. To highlight
specifi c safety information, the following safety defi ni-
tions are provided to assist the reader.

The purpose of safety symbols is to attract your at­tention to possible dangers. The safety symbols, and
their explanations, deserve your careful attention
and understanding. The safety warnings do not by
themselves eliminate any danger. The instructions
or warnings they give are not substitutes for proper
accident prevention measures.

If you need to replace a part, use genuine Stoelting
parts with the correct part number or an equivalent
part. We strongly recommend that you do not use
replacement parts of inferior quality.

Safety Alert Symbol:

This symbol Indicates danger, warning or caution. At­tention is required in order to avoid serious personal
injury. The message that follows the symbol contains
important information about safety.

Signal Word:

Signal words are distinctive words used throughout

this manual that alert the reader to the existence and
relative degree of a hazard.

WARNING

The signal word “WARNING” indicates a potentially
hazardous situation, which, if not avoided, may result
in death or serious injury and equipment/property
damage.

CAUTION

The signal word “CAUTION” indicates a potentially

hazardous situation, which, if not avoided, may result
in minor or moderate injury and equipment/property
damage.

CAUTION

The signal word “CAUTION” not preceded by the
safety alert symbol indicates a potentially hazardous
situation, which, if not avoided, may result in equip­ment/property damage.

NOTICE

The signal word “NOTICE” indicates information or
procedures that relate directly or indirectly to the
safety or personnel or equipment/property.

TABLE OF

CONTENTS

Section Description Page
1 Description and Specifi cations

1.1 Description ..................................................................................................1

1.2 Specifi cations .............................................................................................2

2 Installation Instructions

2.1 Safety Precautions .....................................................................................3

2.2 Shipment and Transit ..................................................................................3

2.3 Machine Installation ....................................................................................3

2.4 Installing Wiring ..........................................................................................3

2.5 Mix Pump ....................................................................................................4

A. Mix Pump Hose Installation..................................................................................4

B. Mix Pickup Hose Installation ................................................................................4

C. Mix Low Level Indicator Adjustment .....................................................................6

3 Initial Set-Up and Operation

3.1 Operator’s Safety Precautions ...................................................................7

3.2 Operating Controls and Indicators ..............................................................7

3.3 Disassembly of Parts ..................................................................................8

3.4 Cleaning Disassembled Parts ....................................................................9

A. Remove Front Door ..............................................................................................9

B. Remove Auger .....................................................................................................9

3.5 Sanitizing Parts ...........................................................................................9

3.6 Cleaning the Machine .................................................................................9

3.7 Assembling the Machine ............................................................................10

3.8 Sanitizing ....................................................................................................11

3.9 Freeze Down and Operation ......................................................................11

3.10 Mix Information ...........................................................................................12

3.11 Operation of Mix Pump ...............................................................................12

Section Description Page
4 Maintenance and Adjustments

4.1 Overrun Adjustment ....................................................................................15

4.2 Mix Pump Hose Reposition ........................................................................15

4.3 Mix Pump Hose Replacement ....................................................................16

4.4 Drive Belt Tension Adjustment ....................................................................16

4.5 Condenser Cleaning (Air-Cooled Machines) ..............................................17

4.6 Preventative Maintenance ..........................................................................17

4.7 Extended Storage .......................................................................................17

5 Troubleshooting

5.1 Error Codes ................................................................................................19

5.2 Troubleshooting - Error Codes ...................................................................19

5.3 Troubleshooting - Machine .........................................................................21

5.4 Troubleshooting - Mix Pump .......................................................................23

6 Replacement Parts

6.1 Brushes, Decals and Lubrication ................................................................25

6.2 Trays ...........................................................................................................25

6.3 Auger Shaft and Front Door Parts ..............................................................26

6.4 Cab Tubing .................................................................................................27

SECTION 1

DESCRIPTION AND SPECIFICATIONS

1.1 DESCRIPTION

The Stoelting U431 I2 fl oor model machine is pressure
fed. It is equipped with fully automatic controls to provide
a uniform product.

This manual is designed to assist qualifi ed service per-
sonnel and operators with installation, operation and
maintenance of the U431 I2.

Figure 1-1 Model U431 I2 Machine

Figure 1-2 Dimensions

1

1.2 SPECIFICATIONS

U431-I2 Water Cooled U431-I2 Air Cooled

Dimensions Machine with crate Machine with crate

width 26-3/4’’ (67,9 cm) 34’’ (86,4 cm) 26-3/4’’ (67,9 cm) 34’’ (86,4 cm)

height 67-1/2’’ (171,5 cm) 78’’ (198,1 cm) 68-3/4’’ (174,6 cm) 78’’ (198,1 cm)

depth 39-1/2’’ (100,3 cm) 48’’ (121,9 cm) 39-1/2’’ (100,3 cm) 48’’ (121,9 cm)

Weight 760 lbs (344,7 kg) 908 lbs (411,8 kg) 785 lbs (356,0 kg) 935 lbs (424,1 kg)

Electrical 1 PH 3 PH 1 PH 3 PH

left right left right left right left right

minimum circuit

ampacity

maximum overcurrent

protection device

32A 32A 20A 20A 32A 32A 20A 20A

50A 50A 30A 30A 50A 50A 30A 30A

International Option

1 Phase, 220-240 VAC, 50Hz or

3 Phase, 380-415 VAC, 50Hz

Two - 19,000 Btu/hr

Compressor

Cabinet - 1,300 Btu/hr Compressor (R-134a)

Drive Motor Two - 2 hp

Water cooled units require 1/2” N.P.T.

water and drain fi ttings. Maximum

Cooling

water pressure of 130 psi. Minimum

water fl ow rate of 3 GPM. Ideal EWT

of 50°-70°F. The machine requires 6”

Air cooled units require 6” (15,2 cm) air

space on all sides and open at the top.

(15,2 cm) air space on all sides for the

cabinet refrigeration system.

Hopper Volume Two - 8 gallon (30,28 liters)

Freezing Cylinder

Volume

Two - 1.33 gallon (5,3 liters)

2

SECTION 2

INSTALLATION INSTRUCTIONS

2.1 SAFETY PRECAUTIONS

Do not attempt to operate the machine until the safety
precautions and operating instructions in this manual are
read completely and are thoroughly understood.

Take notice of all warning labels on the machine. The la­bels have been put there to help maintain a safe working
environment. The labels have been designed to withstand
washing and cleaning. All labels must remain legible for
the life of the machine. Labels should be checked periodi­cally to be sure they can be recognized as warning labels.

If danger, warning or caution labels are needed, indicate
the part number, type of label, location of label, and quantity
required along with your address and mail to:

STOELTING

ATTENTION: Customer Service

502 Hwy. 67

Kiel, Wisconsin 53042

2.2 SHIPMENT AND TRANSIT

The machine has been assembled, operated and inspected
at the factory. Upon arrival at the fi nal destination, the
entire machine must be checked for any damage which
may have occurred during transit.

With the method of packaging used, the machine should
arrive in excellent condition. THE CARRIER IS RESPON­SIBLE FOR ALL DAMAGE IN TRANSIT, WHETHER
VISIBLE OR CONCEALED. Do not pay the freight bill
until the machine has been checked for damage. Have
the carrier note any visible damage on the freight bill. If
concealed damage and/or shortage is found later, advise
the carrier within 10 days and request inspection. The
customer must place a claim for damages and/or short­ages in shipment with the carrier. Stoelting, Inc. cannot
make any claims against the carrier.

2.3 MACHINE INSTALLATION

WARNING

Installation must be completed by a qualifi ed
electrician/refrigeration specialist.

Incorrect installation may cause personal injury,
severe damage to the machine and will void fac­tory warranty.

B. Install the four casters. Turn the threaded end

into the machine until no threads are showing. T o
level, turn out casters no more than 1/4” maximum,
then tighten all jam nuts.

C. The machine must be placed in a solid level

position.

NOTE

Accurate leveling is necessary for correct drainage
of freezing cylinder and to insure correct overrun.

D. Machines with air cooled condensers require a

minimum of 6” (15,2 cm) air space on all sides
and an open top for proper circulation.

E. In air-cooled machines, use a voltmeter to measure

incoming voltage. If the supply voltage is 215 or
less, remove the right side panel and move the
voltage selector toggle switch to the 208V position.

F. Machines that have a water cooled condenser

require 1/2” NPT supply and drain fi ttings.

2.4 INSTALLING WIRING

A. Refer to the nameplate on the side panel of the

machine for specifi c electrical requirements. Make
sure the power source in the building matches
the nameplate requirements. Bring the wires into
the junction boxes through the access holes in
the bottom rear of the freezer.

NOTE

Three phase freezers in areas of unbalanced elec­trical loads require special attention when connect­ing input electrical power. The unbalanced leg of
power (called wild or high) must be connected to
L2 in the junction box.

B. Remove the back panel and the junction box

cover located at the bottom of the machine.
C. Install permanent wiring according to local code.
D. Check the auger shaft rotation by pressing the

Main Power On/Off button and pressing the Clean

Left and Clean right buttons. Auger shaft rotation

is clockwise as viewed through the clear front

door.
E. Press the Clean buttons to stop the augers after

checking the rotation.

Installation of the machine involves moving the machine
close to its permanent location, removing all crating, set­ting in place, assembling parts, and cleaning.

A. Uncrate the machine.

3

6” (15cm)

Figure 2-2 Mix Hose Installation

2.5 MIX PUMP

A. MIX PUMP HOSE INSTALLATION

Follow the steps below to install the mix pump hose in
the cabinet part of the machine.

1. Turn the mix pump on by pressing the Pump On/
Off button on the touchpad.

2. Feed one end of the mix pump hose into the
entering or pickup hose side (left) of black cover
(Fig 2-2).

NOTE

Feed the tube into the clamp so the natural curve of
the tube is towards the outside of the black cover.
This prevents the hose from looping around the
black cover twice.

3. Gently push the hose into the black cover until it
begins to feed.

4. Allow the hose to feed itself through the pump
until about 6” (15cm) remains on the entering
side.

5. Turn the pump off.

6. Connect the mix pump hose to the elbow fi tting
(located on the left side of the mix line manifold)
using a small hose clamp. Be careful not to twist
the mix hose.

7. Turn the pump on.

8. Allow the remaining 6” (15cm) of tubing to feed
through pump until the hose adapter prevents
further feeding.

9. Turn the pump off.

CAUTION

Risk of Product Damage

Air/Mix Tee must remain below the black cover
clamp. If the T ee is above the pump, mix may drain
into the air compressor resulting in pump damage.

10. Connect the free end of the mix pump hose to
the 3-way Tee (Fig. 2-3). When all connections
are complete, the 3-way Tee must be lower than
the black pump housing.

B. MIX PICKUP HOSE INSTALLATION

The machine may be connected to the standard mix
container or up to three prepacked mix bags. Follow the
instructions below that match your confi guration.

Standard Connection:

1. Place the mix pickup assembly through the hole
in the cover and install the retaining clip.

2. Connect a 24” (61cm) length of 3/8” (9,5mm)
ID plastic food grade tubing to the mix pickup
assembly. Secure with a hose clamp.

3. Connect the elbow fi tting to the free end of the
tubing. Connect the opposite end of the elbow
to 1/4” ID tan tubing on the left side of the pump
head. Secure with hose clamps (Fig. 2-3).

4

Figure 2-3 Mix Pump Connections for Standard Mix Container

When Using Bag Connection System (BCS) with Three
Bags (optional kit):

The position of the three bags in the mix container is
important. The bag that is connected nearest the outlet
of the manifold will drain last and should be placed at
the back of the mix container. The mix low level indicator
relies on proper bag placement.

1. Connect 3/8” (9,5mm) ID plastic food grade tubing
to a bag adapter. Secure with hose clamps.

2. Slide the hose clip over free end of 3/8” (9,5mm)
ID plastic food grade tubing. Attach the free end
of the tubing to a manifold adapter. Secure with
a large hose clamp or equivalent.

3. Push the manifold adapter with spring and valve
into the left port (nearest the manifold outlet) of
the mix inlet manifold and secure with a retaining
clip.

4. Repeat steps 1 to 3 for the middle port and for
the right port of the mix inlet manifold.

5. Place three mix bags into the mix container.

6. Connect the bag adapter attached to the left side
of the manifold (closest to the mix outlet) to the
mix bag in the back of the mix container.

7. Connect the bag adapter attached to the middle
of the manifold to the mix bag in the middle of
the mix container.

8. Connect the bag adapter attached to the right
side of the manifold (farthest from the mix outlet)
to the mix bag in the front of the mix container.

When Using Bag Connection System (BCS) with One
or Two Bags (optional kit):

When connecting one or two bags, the manifold adapt­ers must be installed closest to the manifold outlet and
the manifold plug(s) must be placed farthest from the
manifold outlet.

1. Connect 3/8” (9,5mm) ID plastic food grade tubing
to a bag adapter. Secure with hose clamps.

2. Slide the hose clip over the free end of the tubing.
Attach the free end of the tubing to a manifold
adapter. Secure with a large hose clamp.

3. Push the manifold adapter with spring and valve
into the left port (nearest the manifold outlet) of
the mix inlet manifold and secure with retaining
clip. (See Figure 2-4).

4. If using two mix bags, repeat steps 1 to 3 for the
middle port.

5. Install a manifold plug into each empty inlet and
secure with a retaining clip.

5

6. Place the mix bag(s) into the mix container.

7. Connect the bag adapter attached to the left side
of the manifold (closest to the mix outlet) to the
mix bag in the back of the mix container.

C. MIX LOW LEVEL INDICATOR ADJUSTMENT

The sensitivity of the “Mix Low” indication can be adjusted
to operator preference. If more advanced notice of low mix
is required, loosen the black adjustment knobs located on
the sensor brackets at the back of the machine cabinet
and slide the bracket upwards. If the “Mix Low” message
(right side) or fl ashing light (left side) appears while there
is still suffi cient mix in the container, slide the bracket
downward. Be sure to tighten the adjustment knobs after
properly positioning the sensor.

Retaining

Clip

Mix Inlet
Manifold

Manifold

Adapter

Manifold

Plug

Bag Adapter

Figure 2-4 Bag Connection System (Optional)

6

SECTION 3

INITIAL SET-UP AND OPERATION

3.1 OPERATOR’S SAFETY PRECAUTIONS

SAFE OPERATION IS NO ACCIDENT; observe these
rules:

A. Know the machine. Read and understand the

Operating Instructions.

B. Notice all warning labels on the machine.
C. Wear proper clothing. Avoid loose fi tting garments,

and remove watches, rings or jewelry that could
cause a serious accident.

D. Maintain a clean work area. Avoid accidents by

cleaning up the area and keeping it clean.

E. Stay alert at all times. Know which switch, push

button or control you are about to use and what
effect it is going to have.

F. Disconnect power for maintenance. Never

attempt to repair or perform maintenance on the
machine until the main electrical power has been
disconnected.

G. Do not operate under unsafe operating conditions.

Never operate the machine if unusual or excessive
noise or vibration occurs.

3.2 OPERATING CONTROLS AND INDICATORS

Before operating the machine, it is required that the op­erator know the function of each operating control. Refer
to Figure 3-1 for the location of the operating controls on
the machine. For the information regarding error codes
displayed on the control panel, refer to the troubleshooting
section of this manual.

WARNING

High voltage will shock, burn or cause death. Make
sure the display shows the freezing cylinders and
pump are off. If they are not, press the On/Off button
and Pump button to turn them off prior to disas­sembling for cleaning or servicing. Do not operate
machine with panels removed.

Dispense

Rate Adjuster

Figure 3-1 U431 I2 Machine Controls

IntelliT ec2 Control

(See Figure 3-2)

7

A. INTELLITEC2 TOUCHPAD
Main Power On/Off

The Main Power button is used to supply power to the
IntelliTec2 control, the freezing cylinder circuits and the
storage refrigeration system. When the machine is fi rst
plugged in, the control defaults to the On status with power
to the cabinet only. If the Main Power On/Off button is
pressed when the machine is on, the machine will turn
off and a status message will be displayed on the screen.

Help

Pressing the Help button will display help information
dependant on the cursor’s location. Pressing the Help
button again will exit the help screen.

Selection Button (SEL)

The SEL button is used by service technicians to select
menu options.

Set Button (SET)

The SET button is used by service technicians to save
changes when modifying control settings.

On/Off Button

Power to the freezing cylinders can then be controlled
with the On/Off Left and On/Off Right buttons.

Push to Freeze Button

Pressing the PUSH TO FREEZE button initiates “Serve
Mode”.

Clean Button

The CLEAN button initiates “Clean Mode”.

Pump Button

The PUMP On/Off buttons control power to the pump.

NOTE

If the setting for the pump is automatic, the Pump
On/Off buttons will not operate the pump and the
display will show the pumps set to automatic.

Figure 3-2 IntelliTec2 Control

3.3 DISASSEMBLY OF PARTS

Before using the machine for the fi rst time, complete
machine disassembly, cleaning and sanitizing proce­dures need to be followed. Routine cleaning intervals
and procedures must comply with the local and state
health codes. Inspection for worn or broken parts should
be made at every disassembly of the machine. All worn
or broken parts should be replaced to ensure safety to
both the operator and the customer and to maintain good
machine performance and a quality product. Check the
wear line on the auger fl ights on a regular basis (Fig.
3-3) and replace as needed. Frequency of cleaning must
comply with the local health regulations.

Wear Line

Arrow Buttons ()

The arrow buttons are used by service technicians to
navigate through the control readings and settings.

B. SPIGOT SWITCH

The spigot switch is mounted to the spigot cam assembly
behind the header panel. When the spigot is opened to
dispense product, the spigot switch opens and the “Serve
Mode” begins.

C. DISPENSE RATE ADJUSTOR

The dispense rate adjustor is located under the header
panel, to the immediate right of the spigot handles. Turning
the knob counterclockwise will decrease the dispense rate.

Figure 3-3 Auger Flight Wear

T o disassemble the machine, refer to the following steps:

A. REMOVE FRONT DOOR

1. Remove the knobs on the front door and remove
the door by pulling it off the studs.

2. Remove the air bleed valve by unscrewing the
knob while holding the valve stem from behind.
Remove the compression spring and push the
air bleed valve through the rear of the front door.

8

Figure 3-4 Removing O-Ring

3. Remove the spigots through the bottom of the
front door.

4. Remove all o-rings from parts by fi rst wiping off
the lubrication using a clean towel. Then squeeze
the o-ring upward to form a loop (Fig. 3-4). Roll
the o-ring out of the groove.

B. REMOVE AUGER

1. Remove the front auger support and bushing.

2. Remove the auger assembly from the machine.
Pull the auger out of the machine barrel slowly.
As the auger is being pulled out, carefully remove
each of the plastic fl ights with springs.

3. Keep the rear of the auger tipped up once it is
clear of the freezing cylinder to prevent the rear
seal assembly from dropping.

4. Wipe the spline lubricant off of the hex end of the
auger with a paper towel. Remove the rear seal
assembly (Fig. 3-5).

5. Unscrew the springs from the auger fl ights.

Remove O-Ring

From Inside Insert

Figure 3-5 Rear Seal Assembly

3.4 CLEANING DISASSEMBLED PARTS

Disassembled parts require complete cleaning, sanitiz­ing and air drying before assembling. Local and state
health codes will dictate the procedure required. Some
state health codes require a four sink process (pre-wash,
wash, rinse, sanitize, air dry), while others require a three
sink process (without the pre-wash step). The following
procedures are a general guideline only. Consult your
local and state health codes for the procedures required
in your location.

A. Disassemble all parts.
B. Place all front door and auger parts in clean 90° to

1 10°F (32°C to 43°C) water and wash thoroughly
(four sink procedure only).

C. Place all parts in 90° to 110°F (32°C to 43°C) mild

detergent water and wash thoroughly.

D. Rinse all parts with clean 90° to 110°F (32°C to

43°C) water.

E. Sanitize all machine parts following procedures

outlined below.

3.5 SANITIZING PARTS

A. Use a sanitizer, mixed according to manufacturer’s

instructions, to provide a 100 parts per million
strength solution. Mix sanitizer in quantities of
no less than 2 gallons of 90° to 110°F (32°C to
43°C) water. Any sanitizer must be used only in
accordance with the manufacturer’s instructions.

B. Place all parts in the sanitizing solution for 5

minutes, then remove and let air dry completely
before assembling in machine.

3.6 CLEANING THE MACHINE

The exterior should be kept clean at all times to preserve
the luster of the stainless steel. A high grade of stainless
steel has been used on the machine to ease cleanup. To
remove spilled or dried mix, wash the exterior with 90° to
110°F (32°C to 43°C) soapy water and wipe dry.

Do not use highly abrasive materials, as they will mar the
fi nish. A mild alkaline cleaner is recommended. Use a soft
cloth or sponge to apply the cleaner. For best results, wipe
with the grain of the steel.

A. Clean the rear seal surfaces on the inside of the

freezing cylinders.

B. Using sanitizing solution and the large barrel

brush provided, sanitize the freezing cylinders by
dipping the brush in the sanitizing solution and
brushing the inside of the freezing cylinders.

C. Remove the drip trays from the front panel. Clean

and replace the drip trays.

9

3.7 ASSEMBLING THE MACHINE

T o assemble the machine parts, refer to the following steps:

NOTICE

Petrol-Gel sanitary lubricant or equivalent must be
used when lubrication of machine parts is specifi ed.

NOTICE

The United States Department of Agriculture and
the Food and Drug Administration require that lubri­cants used on food processing equipment be certi­fi ed for this use. Use lubricants only in accordance
with the manufacturer’s instructions.

A. Assemble all o-rings onto parts dry, without

lubrication. Then apply a thin fi lm of sanitary
lubricant to exposed surfaces of the o-rings.

B. Install the rear seal o-ring. Lubricate the outside

of the rear seal o-ring with sanitary lubricant.

C. Install the stainless steel rear seal adapter into

the rear seal dry (without lubricant). Lubricate the
inside surface of the rear seal adapter, including
the adapter o-ring, and install it onto the auger
shaft. DO NOT lubricate the outside of the rear
auger seal (Fig. 3-6).

Petrol-Gel

Spline

Lubricant

Figure 3-6 Rear Seal Assembly

D. Lubricate the hex drive end of the auger with a

small amount of spline lubricant. A small container
of lubricant is shipped with the machine.

E. Screw the springs onto the studs in the plastic

fl ights. The springs must be screwed into the
fl ights completely to provide proper compression.

F. Install the two plastic fl ights onto the rear of the

auger and insert it part way into the freezing
cylinder.

Place O-Ring

Inside Insert

Figure 3-7 Front Door

G. Install the remaining plastic fl ights, push the auger

into the freezing cylinder and rotate slowly until
the auger engages the drive shaft.

H. Apply a thin layer of sanitary lubricant to the inside

and outside of the auger support bushing. Install
the bushing onto the auger support and install the
auger support into the front of the auger. Rotate
the auger support so that one leg of the support
points straight up.

I. Assemble the air bleed valve o-ring onto the air

bleed valve. Position the o-ring into the groove
close to the wide part. Apply a thin fi lm of sanitary
lubricant to the o-ring.

J. Insert the air bleed valve into the back of the front

door. Install the compression spring onto the air
bleed valve then screw the knob on fi nger tight.

K. Apply a thin layer of sanitary lubricant to the o-rings

on the spigot bodies and install the spigot bodies
through the bottom of the front door.

L. Fit the front door o-ring into the groove on the

rear of the front door.

M. Place the front door assembly on the mounting

studs and the push front door against the machine
carefully.

N. Secure the front door to the machine by placing

the knobs on the studs and tightening until fi nger
tight. Do not overtighten. Proper o-ring seal can
be observed through the transparent front door.

10

3.8 SANITIZING

Sanitizing must be done after the machine is clean and
just before the machine is fi lled with mix. Sanitizing the
night before is not effective. However , you should always
clean the machine and parts after using it.

NOTE

The United States Department of Agriculture and
the Food and Drug Administration require that all
cleaning and sanitizing solutions used with food
processing equipment be certifi ed for this use.

When sanitizing the machine, refer to local sanitary regu­lations for applicable codes and recommended sanitizing
products and procedures. The frequency of sanitizing
must comply with local health regulations. Mix sanitizer
according to manufacturer’s instructions to provide a 100
parts per million strength solution. Mix sanitizer in quanti­ties of no less than 2 gallons of 90°F to 110°F (32°C to
43°C) water. Allow sanitizer to contact the surfaces to be
sanitized for 5 minutes. Any sanitizer must be used only
in accordance with the manufacturer’s instructions.

CAUTION

Risk of Product Damage

Avoid prolonged contact of sanitizer with machine
parts. Sanitizer may cause corrosion of stainless
steel parts if there is prolonged contact.

A. Prepare 3 gallons of sanitizing solution following

manufacturer’s instructions, and pour it into the
storage container.

B. Make sure the display shows the freezing cylinder

is off. If it is not, press the On/Off Left or On/Off
Right button to turn it off.

NOTE

If the freezing cylinder is not off, the control will
not go into Clean mode. This is to protect from ac­cidentally going into Clean mode.

B. Press the Pump button to turn the pump ON and

open air bleed valve on the front door by pushing
valve in and holding.

C. Let sanitizing solution fi ll the machine barrel to

air bleed valve, then close the valve by pulling
out to lock in place.

D. Press the Clean button to start the auger rotating.
E. Check for leaks when the machine barrel is fi rst

pressurized with sanitizing solution.

1. Check for leaks at the front door, the o-ring
may not be sealed.

2. Check the drain located at the center of the
Drip Tray for leaks coming from the rear auger
seal.

3. Check inside cab unit for leaks at all the hose
connections.

F. Use a sanitized soft bristle brush dipped in

sanitizing solution to clean mix container.

G. After fi ve minutes, open spigot to drain sanitizing

solution.

H. When the solution has drained, press the Pump

and Clean buttons to stop the pump and auger.
Allow the freezing cylinder to drain completely.

The machine is now sanitized and ready for adding mix.

3.9 FREEZE DOWN AND OPERATION

Refer to the following procedures to operate both freez­ing cylinders.

A. Sanitize immediately before use.
B. Make sure the display shows the freezing cylinder

is off. If it is not, press the On/Off Left or On/Off
Right button to turn it off.

C. Fill the storage containers with at least 3 gallons

of mix.

D. Attach the mix inlet probe to the container and

place the container in the refrigerated cab.
E. Press the Pump button to turn the pump on.
F. Place a container under the spigot and open the

spigot to allow the mix to fl ush out about 8 ounces

(0.23 liters) of sanitizing solution and liquid mix.

Close the spigot.
G. Open the air bleed valve on the front door by

pressing and holding. Hold the valve open until

the mix level in the freezing cylinder is 1/2” from

the air bleed valve.
H. Press the On/Off button for the cylinder.
I. Press the PUSH TO FREEZE button.

NOTE

After the drive motor starts, there is a 5-second
delay before the compressor starts.

J. When the product is ready, the display will read

“SERVE”. Open the spigot to dispense product.

NOTE

If the product consistency needs to be adjusted, use
the Technician passcode and go to the Basic Set­tings menu. Adjust the CutOut Consistency higher
to increase the consistency or lower to de- crease
the consistency. Make adjustments in increments
of 5 for best results.

11

K. The machine dispenses product at a reasonable

draw rate. If the machine is overdrawn, the result
is a soft product or a product that will not dispense
at all. If this occurs, allow the machine to run for
approximately 30 seconds before dispensing more
product. A dispense rate adjustor is located under
the header panel, to the immediate right of the
spigot handle. Turning the knob counterclockwise
will decrease the dispense rate.

L. Do not operate the machine when the MIX LOW

message is displayed. Refi ll the mix container
immediately.

NOTE

The control has a standby mode for Serve 1 and a
sleep mode for Serve 1 and Serve 2. After a preset
number of freezing cycles in Serve 1, the control will
enter the standby mode (followed by sleep mode)
and remain there until someone draws product or
presses the PUSH TO FREEZE button. In Serve 2
the control directly goes into the Sleep2 mode. In
the sleep mode, the machine will keep the product
below 41°F (5°C). Sleep modes do not take the
place of cleaning and sanitizing. Federal, State,
and local regulatory agencies determine frequency
of cleaning and sanitizing.

3.10 MIX INFORMATION

Mix can vary considerably from one manufacturer to
another. Differences in the amount of butterfat content
and quantity and quality of other ingredients have a
direct bearing on the fi nished frozen product. A change
in machine performance that cannot be explained by a
technical problem may be related to the mix.

Proper product serving temperature varies from one
manufacturer’s mix to another. Mixes should provide a
satisfactory product in the 20°F to 24°F range. Diet and
low-carb mixes typically freeze to proper consistency at
higher temperatures.

When checking the temperature, stir the thermometer in
the frozen product to get an accurate reading.

Old mix, or mix that has been stored at too high a tempera­ture, can result in a fi nished product that is unsatisfactory.
To retard bacteria growth in dairy based mixes, the best
storage temperature range is between 33° to 38°F (0.5°
to 3.3° C).

3.11 OPERATION OF MIX PUMP

The mix pumps are operated from the buttons on the
IntelliTec2 touchpad. When the pump button is pressed
On, the mix pump motor will start pumping mix into the
freezing cylinder. When the set pressure is reached, the
mix pump will shut off automatically.

Air/mix to

Air Line

Mix

Intake

Figure 3-9 Mix Pump Hose Routing

NOTE

The mix pump motor is equipped with an internal
overload that will “trip”, disabling the pump when
the motor is overloaded. Consult the troubleshoot­ing section for corrective information. The internal
overload will automatically reset after cooling. If
the condition continues, contact a qualifi ed service
person.

A. Mix Operation: The peristaltic mix pump contains

one continuous mix pump hose. When looking at

the face of the peristaltic mix pump, the left side

of the hose is the mix intake or pickup. The right

side of the hose is the mix discharge. Mix is drawn

up the pickup side of the hose and transferred

through the discharge side to the machine (Fig.

3-9).
B. Air Operation: The air compressor operates

whenever the peristaltic mix pump is running.

Air enters through a check valve on the piston

downstroke. The air is discharged through a

second check valve, on the piston upstroke. The

air and mix join at the tee and then travel to the

machine.
C. The overrun adjustment is preset at the factory.

If an adjustment becomes necessary, refer to

Section 4.

Freezing
Cylinder

3-way

Tee

Mix

Discharge

12

3.12 MIX PUMP CLEANING

NOTICE

Any cleaning procedure must always be followed
by sanitizing before fi lling machine with mix.

The mix pump is approved for CIP (clean in place). It is
thoroughly cleaned when the detergent solution is pumped
through the machine. We recommend completely disas­sembling the pump and disconnecting tubing every 14
days for inspection of parts to confi rm the CIP has been
properly performed. If any residue is detected, clean or
replace those parts as outlined below.

A. With the machine fi lled with mix, press the Clean

button. Allow the auger to agitate for 5 to 10
minutes.

B. Remove the suction tube from the mix container.

Open the spigot to remove the mix remaining in
the freezing cylinder.

C. Pump 2 gallons (7.5 liters) of potable water through

machine until the water coming out of the spigot
is clear.

D. Pump 2 gallons (7.5 liters) of 90° to 1 10°F (32°C

to 43°C) detergent solution through the machine.
The use of soft water is recommended, along with
dishwashing detergents such as “Joy,” “Dawn,”
or equivalent.

E. Press the Pump button to turn the pump Off. Open

the spigot to relieve the remaining pressure.

F . Press the Clean button to stop the cleaning cycle

and press the On/Off button for the cylinder to
turn it Off.

3.13 DISASSEMBLY AND INSPECTION OF
REMOVABLE PARTS

Inspection of removable parts should be made whenever
maintenance is performed or when the pump requires
disassembly.

NOTE

If the mix line or air line is diffi cult to remove, soften
the tubing with a rag soaked in hot water. Hose
connections may be sprayed with Haynes Sanitary
Lubricant for ease of removal.

CAUTION

System Under Pressure

Never disconnect hoses from the machine or the
pump without fi rst opening the spigot to relieve
pressure.

A. Loosen the clamp and remove the air hose from

the pump compressor.
B. Loosen the clamp and disconnect the mix pump

hose. Remove the pickup hose, and the mix

pickup assembly from the mix container.
C. Completely disassemble the hose assembly and

the check valve (Fig. 3-10). Place hoses, tee,

check valve assembly, and pickup hose adapter in

90° to 1 10°F (32°C to 43°C) mild detergent water

and wash thoroughly . Use soft bristle brushes to

clean inside of fi ttings. Rinse all parts in clean

90° to 110°F (32°C to 43°C) water.
D. Carefully inspect each part for wear or damage.

Replace worn or damaged parts.
E. Wash the mix tube and the air tube in the cabinet

with 90° to 110°F detergent water and brushes

provided. Rinse with clean, 90° to 110°F water.
F. Prepare two gallons (7.5 liters) of sanitizing

solution using a USDA certifi ed grade sanitizing

solution. Sanitize all removed parts. Allow them

to air dry.
G. Reassemble both hose assemblies per the

diagram located on the inside of the cab door.

Reconnect the assemblies to the pump hose and

the discharge hose, using the clamps. (Refer to

Section 2.5 Mix Pump).
H. Sanitize assembled machine as per instructions

outlined in Section 3.11.

WARNING

Hazardous Moving Parts

Revolving pump head can grab, mangle, and cause
serious crushing injury. Make sure the display
shows the freezing cylinders and pump are off. If
they are not, press the On/Off button and Pump
button to turn them off.

Figure 3-10 Mix Pump Removable Parts

13

14

SECTION 4

MAINTENANCE AND ADJUSTMENTS

This section is intended to provide maintenance personnel
with a general understanding of the machine adjustments.
It is recommended that any adjustments in this section
be made by a qualifi ed person.

4.1 OVERRUN ADJUSTMENT

The product, when served, is a combination of air and
mix. Overrun is a measure of the amount of air blended
into the mix.

Overrun can be expressed in terms of the amount of
weight loss for a given volume. For example, if a pint of
liquid mix weighs 18 ounces and a pint of frozen product
with air added weighs 12 ounces, the overrun is said to
be 50 percent: 18 oz. - 12 oz. = 6 oz., (6/12) x 100 = 50%

The overrun can be checked by placing a one pint con­tainer on an ice cream scale and zeroing out the scale.
Then fi ll a one pint container with frozen product. The
container should be fi lled over the top and leveled with
a straightedge. The product should not contain any air
pockets. When weighed on an ice cream scale, one pint
of product should weigh 12 to 13 ounces.

The mix pump has been preset at the factory to produce
a product with approximately 40% overrun. Because of
differences in mix formulation, temperatures and baro­metric pressure, this fi gure may vary . It will be necessary
for approximately 2 gallons of mix to be pumped through
the machine before overrun changes in the product are
noticeable.

Overrun is controlled by the length of the air compressor
piston stroke within the piston cylinder. Lengthening the
stroke within the cylinder will increase overrun. Conversely,
shortening the stroke will decrease overrun. To perform
an overrun adjustment, refer to the following procedure:

Overrun

Adjustment

Knob

Figure 4-1 Overrun Adjustment

C. On the air compressor side of the pump, locate

the long/slender piston rocking arm. The rocking

arm downward travel is limited by a stationery

cam. On the face of the cam there is an overrun

setting indicator plate numbered 3 through 8 and

an adjustment knob (Fig. 4-1).
D. The overrun setting is indicated by a pin.
E. To adjust overrun, loosen the allen-head screw

(located within the center of the adjustment knob)

with the 5/32" allen wrench provided. Rotate the

adjustment knob counterclockwise to a higher

number for higher overrun, or clockwise to a

lower number for lower overrun. Each number

multiplied by 10 approximately represents the

overrun percentage (i.e. setting 4 = 40% overrun).
F. Tighten the allen screw, then place the wrench

back in its clip. Replace the lower back panel

and secure with the four screws. Press the Pump

button to turn the pump power On.

4.2 MIX PUMP HOSE REPOSITION

Mix pump hose must be repositioned every 800 gallons
of mix pumped or every 2 weeks. Failure to reposition
the hose will result in reduced mix pump liquid capacity,
dispense stoppage, popping, and possible mix pump hose
leakage. Follow the steps below to reposition the hose:

A. Run cleaning solution through pump.
B. Turn the pump off and relieve any pressure by

opening the spigot.
C. Grasp the pickup hose end of the mix pump hose

with one hand and turn the pump on. Pull down

on the pickup hose end until 12 to 14 inches of

tubing has fed through the pump then turn the

pump off (Fig. 4-2).
D. Loosen the small clamp at the pick-up hose

adapter and disconnect the mix pump hose.
E. Cut 7-1/2 inches off the end of the mix pump

hose.
F. Reconnect the mix pump hose to the adapter.
G. Continue normal operation. Mix hose will

automatically reposition itself with the adapter

near the black cover.

NOTE

Each hose is long enough for 3 repositions before
replacement is required.

A. Press the Pump button to turn the pump power

Off. Disconnect power sources/circuit breakers.

B. Remove the back panel from the machine.

NOTE

The hose timer must be reset each time the hose is
repositioned or replaced to keep an accurate record
of the hose service time. Refer to Section 4.7 I for
instrcutions on resetting the timer.

15

L. Connect the mix pump hose to the elbow fi tting

(located on the left side of the mix line manifold)

using a small hose clamp. Be careful not to twist

the mix hose.
M. Turn the pump on.
N. Allow the remaining 6" (15cm) of tubing to feed

through the pump until the hose adapter prevents

further feeding and turn the pump off.

Pickup

End

Figure 4-2 Pump Hose Reposition

12” to 14”

4.3 MIX PUMP HOSE REPLACEMENT

Mix pump hose must be replaced when tubing cannot be
further repositioned (every four to eight weeks). Failure
to comply will result in hose failure and possible pump
damage. Follow the steps below to replace the hose:

A. Run cleaning solution through pump.
B. Turn the pump off and relieve any pressure by

opening the spigot.
C. Disconnect the mix pump hose at each end.
D. Grasp the discharge hose end with one hand and

turn the pump on. Pull down on the hose until all

of the remaining hose is removed from the pump.

Turn pump off.
E. Rotate pump roller assembly so one roller is at

the 6:00 position.
F . Use a brush that fi ts in the opening and clean the

pump roller assembly, fi rst with detergent water

and then clear water.
G. Connect the new mix pump hose to the pickup

hose adapter using the small clamp.
H. Feed one end of the mix pump hose into the

pickup hose side (left) of the black cover.

NOTE

Feed the tube into the clamp so the natural curve of
the tube is towards the outside of the black cover.
This prevents the hose from looping around the
black cover twice.

CAUTION

Risk of Product Damage

Air/Mix Tee must remain below the black cover
clamp. If the Tee is above the pump, the mix may
drain into the air compressor, resulting in pump
damage.

P . Connect the free end of the mix pump hose to the

3-way Tee. When all connections are complete,
the 3-way T ee must be lower than the black pump
housing.

Q. The pump is now ready to sanitize.

NOTE

The hose timer must be reset each time the hose is
repositioned or replaced to keep an accurate record
of the hose service time. Refer to Section 4.7 I for
instrcutions on resetting the timer.

4.4 DRIVE BELT TENSION ADJUSTMENT

To check belt tension, follow the steps below:
A. Remove a side panel and the back panel.
B. Use a Burroughs Belt Tension Gauge to set the

tension for the drive belt. Set the belt tension to
55-60 lbs.

C. If an adjustment is necessary, loosen the four

motor plate retaining nuts, adjust belt tension
then retighten the four nuts.

D. Using a straightedge, check that the drive motor

pulley is aligned with the speed reducer pulley.
Align the pulley if necessary.

NOTE

Belt life will be increased if new drive belts are
tightened after two or three weeks of operation.

I. Gently push the hose into the black cover until it

begins to feed.
J. Allow the hose to feed itself through the pump

until about 6" (15cm) remains on the entering

side and turn the pump off.

16

4.5 CONDENSER CLEANING (AIR-COOLED
MACHINES)

The condenser requires periodic cleaning. To clean the
condenser, refer to the following steps:

A. Remove the side panel and take out the condenser

fi lter . Visually inspect the condenser fi lter for dirt.
B. If the condenser fi lter is dirty, vacuum or brush

it clean. Rinse it with clean water and allow it to

dry before replacing it on the machine.
C. Visually inspect the condenser for dirt by shining

a light through the coil of the condenser.
D. If the condenser is dirty, place a wet towel over

the condenser.
E. Using compressed air or a CO

tank, blow out

2

the dirt from the inside of the condenser. Most of

the dirt will cling to the wet towel.

NOTE

If the condenser is not kept clean, refrigeration ef­fi ciency will be lost.

4.6 PREVENTATIVE MAINTENANCE

It is recommended that a preventative maintenance
schedule be followed to keep the machine clean and
operating properly . The following steps are suggested as
a preventative maintenance guide.

The United States Department of Agriculture and the Food
and Drug Administration require that lubricants used in
food zones be certifi ed for this use. Use lubricants only in
accordance with the manufacturer’s instructions.

A. Daily checks
Check for any unusual noise or condition and

repair immediately.
B. Monthly checks

1. Check drive belts for wear and tighten belts if

necessary. (Refer to section 4.12)

2. Check the condenser fi lter for dirt. (Refer to

section 4.13).

4.7 EXTENDED STORAGE

Refer to the following steps for winterizing the machine
or for storing the machine over any long period.

A. Clean all of the parts that come in contact with

mix thoroughly with warm detergent . Rinse in
clear water and dry all parts. Do not sanitize.

NOTE

Do not let cleaning solution stand in machine barrel
or mix pump during the shutdown period.

B. Remove, disassemble, and clean the front door,

auger shaft, and mix pump. Leave disassembled
during the shutdown period.

C. Place the plastic auger fl ights in a plastic bag with

a moist paper towel. This will prevent the fl ights
from becoming brittle if exposed to dry air over
an extended period (over 30 days).

D. For water-cooled machines that are left in

unheated buildings, or buildings subject to
freezing, the water must be shut off and
disconnected. Disconnect the water inlet fi tting.
The fi tting is located at the rear of the machine.
Run the compressor for 2 - 3 minutes to open
the water valve (the front door must be attached
for the compressor to run). Blow out all the water
through the water inlet. Drain the water supply
line coming to the machine. Disconnect the water
outlet fi tting.

E. Disconnect the machine from the source of the

electrical supply in the building.

17

18

SECTION 5

TROUBLESHOOTING

5.1 ERROR CODES

When the machine experiences a problem, one of the
following error codes will be displayed on the control
panel. Each error code directs you to the system location
of the malfunction.

ERROR CODE MALFUNCTION
2 High Torque
3 Run Time
4 Clean
5 Freezing Cylinder Sensor
6 Hopper Sensor (single hopper machines)
7 Drive Motor
8 Cab Sensor
9 High Pressure Cutout
10 Auxiliary Sensor
11 Prime (cab units only)
12 Left Hopper Sensor
13 Right Hopper Sensor
21 Spigot Open Time
To return the machine to normal operation, any error

causing condition must be corrected and the power to
the affected freezing cylinder must be cycled. Turn the
power to the freezing cylinder off then back on using the
On/Off button of the affected freezing cylinder.

5.2 TROUBLESHOOTING

Error Code 2 - High Torque

If the control panel displays a High Torque Error

(E2), the controller has sensed that the drive motor

is running at a high load for 10 or more seconds.

This may be due to the product consistency

adjustment being set too high. Press the On/Off

button for the cylinder to turn it off, wait until the

product in the freezing cylinder thaws and then

turn the cylinder back on. Follow the instructions

in Section 3 to reduce the product consistency

by a few levels. If the error persists, contact

your Authorized Stoelting Distributor for further

assistance.

Error Code 3 - Run Time

The Run Time Error (E3) occurs when the

compressor runs continuously for an extended
period. This error is generally caused by very low
mix levels in the mix container or from product
breakdown. Another common cause results
from a restriction preventing mix from entering
the freezing cylinder. Check the mix in the mix
container. If the level mix is low , add mix. If there
is a possibility that the mix has broken down,
clean and sanitize the machine and replace the
mix with fresh product.

Ice crystals in the mix container can clog the

mix inlet system and prevent mix from entering
the freezing cylinder. Thoroughly thaw mix per
manufacturer’s recommendations. To check for
ice crystals, pour a small amount of product from
the mix container through a clean and sanitized
sieve or strainer.

In air cooled machines, the Run Time Error may

indicate that airfl ow within the machine has
reduced or stopped. Check the sides and top
of the machine for anything that would restrict
airfl ow.

If the error persists after attempting to clear it,

contact your Authorized Stoelting Distributor for
further assistance.

Error Code 4 - Clean

If the machine is left in the Clean Mode for more

than 20 minutes, the control panel will display a
Clean Error (E4). This condition does not refl ect a
problem with the machine itself. The Clean Error
has been programmed into the controller as a
safeguard to protect the machine from potential
damage caused by the machine being accidentally
left in “Clean Mode”. To clear the Clean Error,
press the On/Off button for the cylinder to turn if
off then back on.

19

Error Code 5 - Freezing Cylinder Sensor

The Freezing Cylinder Sensor Error (E5) indicates

a failure of the barrel sensor or if the sensor is

out of range. If the control panel displays an E5,

press the On/Off button for the cylinder to turn

if off then back on. If the error persists, contact

your Authorized Stoelting Distributor for further

assistance.

NOTE

When the machine encounters a Freezing Cylinder
Sensor Error, the machine will continue to run using
preset timers. This mode will allow the operator to
continue serving product until the machine can be
serviced.

Error Code 6 - Hopper Sensor (single hopper machines)

The Hopper Sensor Error (E6) will not occur on

the machine.

Error Code 7 - Drive Motor

If the control panel displays a Drive Motor Error

(E7), the control does not sense current coming

from the drive motor. Press the On/Off button

for the cylinder to turn if off then back on. If the

error persists, contact your Authorized Stoelting

Distributor for further assistance.

Error Code 8 - Cab Sensor

A Cab Sensor Error (E8) indicates a failure of the

cabinet sensor or if the sensor is out of range. If

the control panel displays an E8, press the On/

Off button for the cylinder to turn if off then back

on. If the error persists, contact your Authorized

Stoelting Distributor for further assistance.

Error Code 9 - High Pressure Cutout

High Pressure Cutout Errors (E9) are usually

caused by a dirty or ineffi cient condenser. If the

control panel displays an E9 on an air cooled

machine, check for proper air clearance around

the machine. If there is an E9 on a water cooled

machine check for proper fl ow from the water

supply or kinks in the hoses.
If the error persists, contact your Authorized

Stoelting Distributor for further assistance.

Error Code 10 - Auxiliary Sensor

An Auxiliary Temperature Sensor Error (E10)

occurs if the temperature sensor on the control
board fails. Press the On/Off button for the cylinder
to turn if off then back on. If the error persists,
contact your Authorized Stoelting Distributor for
further assistance.

Error Code 11 - Prime Error

The Prime Error (E11) occurs when the pump

runs for an extended period. This usually occurs
if there is a leak in the hose or if there is a
low mix condition. If the error persists, contact
your Authorized Stoelting Distributor for further
assistance.

Error Code 12 - Left Hopper Sensor

The Left Hopper Sensor Error (E12) will not occur

on the machine.

Error Code 13 - Right Hopper Sensor

The Right Hopper Sensor Error (E13) will not

occur on the machine.

Error Code 21 - Spigot Open Time

The Spigot Open Time Error (E21) indicates a

failure of the spigot switch. If the control senses
the spigot is open continuously for 10 minutes, the
machine will go into Sleep 3 mode. If the control
panel displays an E21, press the On/Off button
for the cylinder to turn if off then back on. If the
error persists, contact your Authorized Stoelting
Distributor for further assistance.

20

5.3 TROUBLESHOOTING - MACHINE

PROBLEM POSSIBLE CAUSE REMEDY

1 Power to machine is off. 1 Supply power to machine.

Machine does not
run.

Machine will not
shut off.

Product is too fi rm. 1 CutOut Consistency setting too high 1 Adjust the CutOut Consistency (See Section 3)

2 Freeze-up (auger will not turn). 2 Turn Clean/Off/On switch Off for 15 minutes,

then restart.
3 Front door not in place. 3 Assemble front door in place.
1 Drive belt failure. 1 Replace drive belt.

2 Refrigeration problem. 2 Check system. (Call distributor for service)

1 No vent space for free fl ow of cooling

air.

2 Condenser is dirty. 2 Clean the condenser. (See Section 3)

1 A minimum of 3” of air space at the back. (See

Section 2)

Product is too soft.

Product does not
dispense.

Drive belt slipping
or squealing.

Rear auger seal
leaks.

3 CutOut Consistency setting too low 3 Adjust the CutOut Consistency (See Section 3)
4 Auger is assembled incorrectly. 4 Remove mix, clean, reassemble, sanitize and

freeze down.
5 Refrigeration problem. 5 Check system. (Call distributor for service)

1 No mix in hopper. 1 Add mix to the hopper.
2 Drive motor overload tripped. 2 Wait for automatic reset. (If condition

continues, call distributor for service.)
3 Drive belt failure. 3 Replace drive belt.

4 Freeze-up (Auger will not turn). 4 Turn off cylinder, wait for 15 minutes, then

restart.
1 Worn drive belt. 1 Replace drive belt.

2 Freeze-up (Auger will not turn). 2 Turn off cylinder, wait for 15 minutes, then

restart.
3 Not tensioned properly. 3 Adjust belt tension

1 Outside surface of rear auger seal is

lubricated.

2 Rear seal missing or damaged. 2 Check or replace.

3 Seal o-ring missing, damaged or

installed incorrectly.

4 Worn or scratched auger shaft. 4 Replace auger shaft.

1 Clean lubricant from outside of rear seal,

lubricate inside of seal and reinstall.

3 Check or replace.

Front door leaks.

1 Front door knobs are loose. 1 Tighten knobs.
2 Spigot parts are not lubricated. 2 See Section 3.
3 Chipped or worn spigot o-rings. 3 Replace o-rings.
4 O-rings or spigot installed wrong. 4 Remove spigot and check o-ring.
5 Inner spigot hole in front door nicked

or scratched.

21

5 Replace front door.

5.4 TROUBLESHOOTING - MIX PUMP

PROBLEM POSSIBLE CAUSE REMEDY

1 Power to pump is off. 1 Supply power to pump.
2 Low voltage. 2 Check for low voltage.
3 Mix pump hose jammed inside black

cover/clamp.

Pump motor does
not run.

4 Pump motor overloaded. 4 Allow internal thermal overload to reset;

5 Pressure switch on pump is defective. 5 Check mechanical operation and continuity of

6 Defective motor/capacitor. 6 Check motor amperage draw and/or capacitor.

Note 1: A properly working pump will fi ll an 8 oz. cup with mix in about 9 seconds.

3 Disconnect pump from power source. Remove

four cover/clamp thumb screws. Separate

cover/clamp halves and remove outer half.

Remove jammed hose. Clean and re-install

cover/clamp and tighten four thumb screws

securely. Allow motor thermal overload to

reset.

determine overload cause and repair.

pressure switch.

Replace motor or capacitor.

Pump operates but
cylinder will not fi ll.

Overrun too low or
no overrun.

Note 2: Immediately after a bag change the pump may be unable to reestablish it’s prime
with the system at operating pressure. In this case, turn the pump off. Draw 2-3 pints to
reduce system pressure to zero. Turn pump on. Purge remaining air in mix bag and pick-up
hose.

Important: before connecting the pick-up hose to the mix bag, remove as much air
from the mix bag as possible.

1 Out of Mix. 1 Replenish mix supply.
2 Mix pump hose kinked inside black

cover/clamp.

3 Hoses assembled incorrectly. 3 Refer to diagram for correct hose connections.

4 Mix pump hose service life is

exceeded.

5 Mix pump hose not connected to

machine.
6 Ice crystals in mix. 6 Completely thaw mix prior to use.
7 Mix bag drawn against adapter. 7 Ensure bag is clear of pick-up tube.
8 Foreign objects in mix. 8 Clear blockage. Use fresh mix.
9 Check valve is backwards. 9 Observe fl ow arrow for proper orientation.
1 Overrun setting too low. 1 Increase overrun setting.
2 Air leak. 2 Tighten all hose clamps.
3 Air compressor not pumping air. 3 Contact local Stoelting Distributor.
4 Air check valve in backwards. 4 Check arrow for direction of fl ow.

2 Disconnect pump from power source. Remove

four cover/clamp thumb screws. Separate
cover/clamp halves and remove outer half.
Remove jammed hose. Clean and re-install
cover/clamp and tighten four thumb screws
securely. Allow motor thermal overload to
reset.

4 Reposition/replace mix pump hose. See

Section 4.9

5 Connect mix pump hose to machine.

22

PROBLEM POSSIBLE CAUSE REMEDY

Overrun too high.

Replacement mix
pump hose won’t
feed through pump.

Air exiting mix pick­up hose.

Dispensed product
air “pops”

Mix leakage from
pump.

1 Mix pump hose service life is

exceeded.
2 Out of mix. 2 Replenish mix supply.
3 Overrun setting too high. 3 Decrease overrun setting.
4 Pick-up leg of mix pump hose is

collapsing.
1 Feeding hose into discharge hole of

mix pump cover.
2 Hose ends not cut squarely. 2 Carefully cut hose end off squarely (no tails).
3 Force feeding too quickly. 3 Gently and slowly assist feeding of hose up

4 Pump motor not running. 4 Press the Pump button to turn the pump On.
1 Pickup tube check valve missing. 1 Contact local Stoelting Distributor.

1 Overrun setting too high. 1 Decrease overrun setting.
2 Mix pump hose service life is

exceeded.
3 Overdrawing the machine’s capacity. 3 Reduce dispense rate.
4 Recent low mix condition. 4 Open spigot fully and allow excess air to

CAUTION: To prevent mix pump damage from dried mix deposits, immediately
disassemble and clean pump.

1 Mix pump hose service life is

exceeded.

Note: The action of the air compressor rocking arm creates a repetitive clicking sound during
operation. This is normal.

1 Reposition/replace mix pump hose.

4 Reposition hose.

1 Feed hose into suction side of cover.

into pick-up hose side of cover.

2 Reposition/replace mix pump hose.

escape.

1 Remove mix pump hose. Disconnect pump

from power source. Remove mix pump cover/
clamp. Clean the rollers a small amount of
soapy water. Clean mix from pump. See
Section 4.2 for hose replacement.

Pump is noisy/
squeaking.

Mix in air hoses.

Note: The peristaltic mix pump has three squeeze rollers that use self lubricating bearings.
If squeaking exists with the mix pump hose in place and stops with the hose removed, the
squeeze roller bearings can be lubricated using a silicone based spray. Remove the mix
pump hose. Disconnect pump from electrical power. Remove four cover/clamp thumbscrews.
Remove entire cover/clamp as one unit. Spray silicone based lubricant on each end of each
squeeze roller. Spin rollers to work lubricant into bearings. Repeat as needed.

Caution: Do not use cleaning/dissolving type lubricants like wd-40. These lubricants
are not bearing friendly and will accelerate bearing wear.

1 Air/mix tee above black cover/clamp. 1 Air/mix tee must be below black cover/clamp.
2 Air leak. 2 Check stainless steel tube connection. Tighten

all hose clamps.

3 Mix hose on wrong air/mix tee fi tting. 3 Refer to diagram for correct hose connections.

23

24

SECTION 6

REPLACEMENT PARTS

6.1 BRUSHES, DECALS AND LUBRICATION

Part Number Description Quantity

208135 Brush - 4” X 8” X 16” (Barrel) 1
208380 Brush - 1/4” X 3” X 14” 1
208465 Brush - 1” X 3-1/2” X 18” 1
208467 Brush - 3/8” X 1” X 5” 1
324103 Decal - Caution Rotating Shaft 1
324105 Decal - Caution Electrical Shock 1
324106 Decal - Caution Electrical Wiring Materials 1
324107 Decal - Caution Hazardous Moving Parts 1
324125 Decal - Danger Electric Shock Hazard 1
324141 Decal - Caution Rotating Blades 1
324208 Decal - Attention Refrigerant Leak Check 1
324346 Decal - Caution Hazardous Moving Parts 1
324509 Decal - Cleaning Instructions 1
324548 Decal - Adequate Ventilation 6” 1
324566 Decal - Wired According To 1
324594 Decal - Attention Heat Sensitive 1
324686 Decal - Danger Automatic Start 2
324728 Decal - Contactor Identifi cation 1
324803 Decal - Domed Stoelting Logo (Large) (Header Panel) 1
324804 Decal - Domed Stoelting Swirl (Header Panel) 1
324887 Decal - Boost Transformer 1
508048 Lubricant - Spline (2 oz Squeeze Tube) 1
508135 Petrol Gel - 4 oz Tube 1
513640 Manual - Service 1

6.2 TRAYS

Part Number Description Quantity

417010 Grid - Drip Tray (Metal) 1
744252 Tray - Drain 1
744272 Tray - Drain (Cabinet) 1
744273 Tray - Drain 1

417010

744287

25

6.3 AUGER SHAFT AND FRONT DOOR PARTS

Part Number Description Quantity

149003 Bushing - Front Auger Support 2
381804 Auger Flight 12
482004 Knob (Air Bleed Valve) 2
482019 Knob - Front Door (Black) 4
624520 O-Ring - Air Bleed Valve - Black 2
624598 O-Ring - Outside Spigot - Black 4
624614 O-Ring - Top & Bottom Center Spigot - Black 2
624664 O-Ring - Middle Center Spigot - Black 1
624678 O-Ring - Rear Seal - Black 4
625133 O-Ring - Front Door - Black 2
667868 Seal - Rear Auger (Orange) 2
694200 Spring - Air Bleed Valve 2
694255 Spring - Auger Flight 12
2104552 Support - Front Auger 2
2110116 Valve - Air Bleed 2
2177427 Front Door 1
2187880 Adapter - Rear Seal (Code 1) 2
2202179 Auger Shaft 2
3158086 Spigot Body - Center 1
3159696 Spigot Body - Outer 2

26

6.4 CAB TUBING

Part Number Description Quantity

264235 Clamp - Metal (1/4” ID Tubing) (Cab) 8
264241 Clamp - Metal (1/2” ID Tubing) (Cab) 4
264243 Clamp - Metal (3/8” ID Tubing) (Cab) 8
375819 Elbow - Barbed (3/8”- 1/4”) (Cab) 2
376041 Tee Connector - 3-Way (Stainless) (Cab) 2
558109 Mix Container Only (Cab) 2
624607 O-Ring - Check Valve Body - Black (Cab) 4
694247 Spring - Cone (Cab Check Valve) 2
696152 Clip - Lock (Check Valve) (Cab) 6
756067 Tubing - 1/4” ID - Clear - Air Line (25’ Increments) (Per Inch) Two 13”
756079 Tubing - 3/8” ID - Clear - Mix Line (25’ Increments) (Per Inch) Two 24”
756088 Tubing - 1/2” ID - Clear - Mix Line (25’ Increments) (Per Inch) Two 6”
756204 Tubing - 1/4” ID - Pump (50’ Box Only) (Per Inch) (Cab) ­ 756204-40 Tubing - 1/4” ID - Pump (Pre-Cut 40” Piece) (Cab) 8
762256 Check Valve - Mix Outlet (Cab) 2
1183187 Check Valve - Mix In Line (Outer) (Cab) 2
2177274 Clip - Retaining (Mix Probe To Cover) (Cab) 2
2202059 Pick-Up Tube - Mix (Cab) 2
3177229 Cover - Rear (Mix Container) (Cab) 2
3177262 Cover - Front (Mix Container) (Cab) 2

27

WARRANTY

SOFT SERVE / SHAKE FREEZERS

1. Scope:

Stoelting, LLC warrants to the first user (the “Buyer”) that the freezer cylinders, hoppers, compressors, drive

motors, speed reducers, augers and auger flights of Stoelting soft serve / shake freezers will be free from defects
in materials and workmanship under normal use and proper maintenance appearing within five (5) years, and that
all other components of such equipment manufactured by Stoelting will be free from defects in material and
workmanship under normal use and proper maintenance appearing within twelve (12) months after the date that
such equipment is originally installed.

2. Disclaimer of Other Warranties:

THIS WARRANTY IS EXCLUSIVE; AND STOELTING HEREBY DISCLAIMS ANY

IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR PARTICULAR
PURPOSE.

3. Remedies:

Stoelting’s sole obligations, and Buyer’s sole remedies, for any breach of this warranty sh all be the repair or (at

Stoelting’s option) replacement of the affected component at Stoelting’s plant in Kiel, Wisconsin, or (again, at
Stoelting’s option) refund of the purchase price of the affected equipment, and, during the first twelve (12)
months of the warranty period, deinstallation/reinstallation of the affected component from/into the equipment.
Those obligations/remedies are subject to the conditions that Buyer (a) signs and returns to Stoelting, upon
installation, the Checklist/Warranty Registration Card for the affected equipment, (b) gives Stoelting prompt
written notice of any claimed breach of warranty within the applicable warranty period, and (c) delivers the
affected equipment to Stoelting or its designated service location, in its original packaging /crating, also within
that period. Buyer shall bear the cost and risk of shipping to and from Stoelting’s plant or designated service
location.

4. Exclusions and Limitations:

This warranty does not extend to parts, sometimes called “wear parts”, which are generally expected to

deteriorate and to require replacement as equipment is used, including as examples but not intended to be limited
to o-rings, auger seals, auger support bushings and drive belts. All such parts are sold

AS IS.

Further, Stoelting shall not be responsible to provide any remedy under this warranty with respect to any

component that fails by reason of negligence, abnormal use, misuse or abuse, use with parts or equipment not
manufactured or supplied by Stoelti ng, or damage in transit.

THE REMEDIES SET FORTH IN THIS WARRANTY SHALL BE THE SOLE LIABILITY

STOELTING AND THE EXCLUSIVE REMEDY OF BUYER WITH RESPECT TO
EQUIPMENT SUPPLIED BY STOELTING; AND IN NO EVENT SHALL STOELTING BE
LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES, WHETHER FOR
BREACH OF WARRANTY OR OTHER CONTRACT BREACH, NEGLIGENCE OR
OTHER TORT, OR ON ANY STRICT LIABILITY THEORY.

721-013, Rev. 0

File: Policy Manual/Warranty softserve1

January 30, 2003