Vollrath Stoelting F231 User manual

Model F231
SERVICE MANUAL
Manual No. 513659 Rev.2

This manual provides basic information about the machine. Instructions and suggestions are
given covering its operation and care.
The illustrations and specifications 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 pro-
vide new parts for machines built prior to date of change.
DO NOTATTEMPT 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 Stoelting.
Stoelting Foodservice Equipment
502 Highway 67
Kiel, WI 53042-1600
U.S.A.
Main Tel: [phone]
Fax: [phone]
Customer Service: 888.429.5920
Fax: [phone]
Email: [email protected]
© 2014 PW Stoelting, LLC
stoeltingfoodservice.com

Safety Alert Symbol:
This symbol Indicates danger, warning or caution.
Attention is required in order to avoid serious per-
sonal 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.
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.
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. As with any machine, there are hazards
associated with their operation. For this reason safety
is emphasized throughout the manual. To highlight
specific safety information, the following safety defini-
tions are provided to assist the reader.
The purpose of safety symbols is to attract your at-
tention 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.
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” not preceded by the
safety alert symbol indicates a potentially hazardous
situation, which, if not avoided, may result in equip-
ment/property damage.
NOTE (or NOTICE)
The signal word “NOTICE” indicates information or
procedures that relate directly or indirectly to the
safety of personnel or equipment/property.

Service Manual #513659 iii Model F231
INTELLITEC2™ FIRMWARE
VERSION UPDATE LOG
The list below shows the history of the firmware versions in the IntelliTec2™ control. The information in this manual
refers to Version 20.39.
VERSION 20.52
Released on 8/22/11
• Motor Calibration screen now returns to the current status screen after pressing the left arrow.
• Refer Solenoid text changed to Storage Refrigeration.
• When exporting the error log data the file name is now the serial number of machine.
• Serial Number can now be changed in the Modify Contact Information screen.
• CutIn Offset changed to 20 (was 30)
• Default Offtime changed to 450 (was 300)
VERSION 20.39
Released on 3/2/11
• Added phase reversal detection for 3 phase machines
• Added Spigot Open Time error Error 21
• Added support for I/O update
• Changed High Torque Error 2 detection to be directly from motor amperage and not from a calculated factor
VERSION 20.27
Released on 12/28/10
• Added Unit Serial Number to Service Contact Information and Modify Contact Information
• Added Clean Warning to Clean Options
VERSION 20.15
Released 11/23/10
• Added Enable Control to Basic Settings
• Removed Enable CutOut Temp from Basic Settings
• Changed CutOut Consistency to CutOut Consistency Offset
• Added CutIn Consistency Offset
• Moved Sleep 1 Drive On and Sleep 1 Drive Off to Factory Settings from Advanced Settings
• Moved Stir On and Stir Off to Advanced Settings from Factory Settings
• Added Storage Refrigeration to Storage Settings
• Storage CutIn changed to 37.5°F (was 37°F)
• Moved Pressure Sensing and Liquid Sensing to Factory Settings
• Added Clean Options to Utilities page 1
• Moved Clean Lockout to Clean Options from Utilities page 1
• Added Clean History Log to Clean Options

Service Manual #513659 iv Model F231
VERSION 17.19
Released on 9/8/10
Note: They are few initial machines with 15.19 (8/23/10) where cutout consistency was 70, then pulleys were
changed.Two machines with 16.19 had60as cutout limit, then someminorinternalreset timers were changed
and 17.19 released on 9/8/10
• Consistency Limit changed to 60 (was 110 for 1 phase / 80 for 3 phase)
• Moved Stir On and Stir Off to Factory Settings from Basic Settings
• Enable CutOut Temp and CutOut Temp moved to Basic Settings from Factory Settings
• Sleep 1 Drive Off changed to 600 seconds (was 300 seconds)
• Sleep 2 CutIn changed to 33°F (was 38°F)
• Sleep 2 CutOut changed to 30.5°F (was 30°F)
(continued on next page)
VERSION 17.19 (CONTINUED)
• Storage CutOut changed to 32°F (was 31°F)
• Storage Offset changed to 4°F (was 2°F)
• Storage Off Time changed to 13 min (was 2 min)
• Storage On Time changed to 130 sec (was 200 sec)
• Storage Max On changed to 3 min (was 10 min)
• Storage Recovery changed to 4 min (was 1 min)
• Clean Lockout Period moved to Factory Settings from Storage Settings
• Touchpad Lockup moved to Utilities from User Preferences
• Date Format added to Time and Date
• Added second Utilities page
• Changed Utilities page 1 to be accessible to Manager passcode
• Testing and Manual Operation, Restore Factory Defaults, Clear Error Log and Clear Statistics moved to
Utilities page 2 from page 1
• Added Product Selection, Export Machine Stats to Utilities page 1
• Removed Clear EEPROM Map from Utilities
• Added Motor Zero Load Calibration, Restore Motor Table Defaults and Reset Unit Configuration to Utilities
page 2

Section Description Page
1 Description and Specifications
1.1 Description.................................................................................................. 1
1.2 Specifications ............................................................................................. 2
2 Installation Instructions
2.1 Safety Precautions ..................................................................................... 5
2.2 Shipment and Transit.................................................................................. 5
2.3 Machine Installation.................................................................................... 5
2.4 Installing Permanent Wiring........................................................................ 5
2.5 Initial Startup of IntelliTec2™ ...................................................................... 6
3 Initial Set-Up and Operation
3.1 Operator’s Safety Precautions.................................................................... 9
3.2 Operating Controls and Indicators.............................................................. 9
3.3 Disassembly of Machine Parts ................................................................... 10
3.4 Cleaning Disassembled Parts .................................................................... 11
3.5 Sanitizing Machine Parts ............................................................................ 11
3.6 Cleaning the Machine................................................................................. 11
3.7 Assembling the Machine ............................................................................ 12
3.8 Sanitizing .................................................................................................... 12
3.9 Freeze Down and Operation ...................................................................... 13
3.10 Fine Consistency Adjustment ..................................................................... 13
3.11 Mix Information ........................................................................................... 14
4 Maintenance and Adjustments
4.1 Accessing Control Readings and Settings ................................................. 15
4.2 Navigation and Modifying Settings ............................................................. 15
4.3 User Interface Screens............................................................................... 15
4.4 Performance Screens................................................................................. 16
4.5 Settings Screens ........................................................................................ 16
4.6 Utilities Screens.......................................................................................... 18
4.7 Errors & Statistics Screens......................................................................... 21
4.8 Updating Firmware ..................................................................................... 23
4.9 Drive Belt Tension Adjustment.................................................................... 24
4.10 Condenser Cleaning................................................................................... 25
4.11 Preventative Maintenance .......................................................................... 25
4.12 Extended Storage....................................................................................... 25
TABLE OF
CONTENTS

Section Description Page
5 Refrigeration System
5.1 Refrigeration System .................................................................................. 27
5.2 Refrigerant Recovery and Evacuation........................................................ 27
5.3 Refrigerant Charging .................................................................................. 28
5.4 Compressor ................................................................................................ 29
5.5 Condenser .................................................................................................. 30
5.6 Valves ......................................................................................................... 30
A. Thermostatic Expansion Valve (TXV) .................................................................. 30
B. Automatic Expansion Valve (AXV) .......................................................................31
C. Check Valve .........................................................................................................32
D. High Pressure Cutout...........................................................................................32
E. Hot Gas Bypass ................................................................................................... 32
F. Evaporator Pressure Regulator (EPR).................................................................33
G. Water Valve (Water Cooled Models Only)............................................................ 34
5.7 Solenoid...................................................................................................... 34
5.8 Filter Drier................................................................................................... 36
5.9 Capillary Tube............................................................................................. 36
6 Electrical and Mechanical Control Systems
6.1 IntelliTec2™ Control ................................................................................... 37
6.2 Contactors .................................................................................................. 37
6.3 Drive Motor ................................................................................................. 38
6.4 Capacitors .................................................................................................. 39
6.5 Gearbox...................................................................................................... 39
6.6 Condenser Fan Motor (Air-Cooled Only).................................................... 39
6.7 Spigot Switch.............................................................................................. 40
6.8 Temperature Control Sensor ...................................................................... 41
7 Troubleshooting
7.1 Error Codes ................................................................................................ 43
7.2 Troubleshooting .......................................................................................... 44
7.3 Troubleshooting - Machine ......................................................................... 46
8 Replacement Parts
8.1 Decals and Lubrication ............................................................................... 47
8.2 Panels and Screws..................................................................................... 47
8.3 Auger Shaft and Faceplate Parts ............................................................... 48
8.4 Air Plenum Kit............................................................................................. 49
8.5 Internal Components .................................................................................. 50
8.6 Spigot Assembly ......................................................................................... 52
8.7 Front ........................................................................................................... 52
8.8 Wiring Diagrams ......................................................................................... 53

Service Manual #513659 1 Model F231
SECTION 1
INTRODUCTION
1.1 DESCRIPTION
The Stoelting F231 floor machine is gravity fed. The
machine is equipped with the IntelliTec2™ control which
provides a uniform product. The F231 is designed to
operate with almost any type of commercial soft serve or
non-dairy mixes available, including: ice milk, ice cream,
yogurt, and frozen dietary desserts.
This manual is designed to assist qualified service per-
sonnel and operators in the installation, operation and
maintenance of the Stoelting F231 gravity machine.
Figure 1-1 Model F231

Service Manual #513659 2 Model F231
1.2 SPECIFICATIONS
Figure 1-2 Dimension Specifications (variations on spigot handles and casters available)
Model F231
Dimensions Machine as shipped
width 19-1/4’’ (48,9 cm) 32’’ (81,3 cm)
height 58-1/4’’ (148,0 cm) 60’’ (152,4 cm)
depth 28’’ (71,1 cm) 39’’ (99,1 cm)
Weight 400 lbs (181,4 kg) 470 lbs (213,1 kg)
Electrical 1 Phase, 208-240 VAC, 60Hz 3 Phase, 208-240 VAC, 60Hz
running amps 12A 10A
connection type NEMA 6-20P power cord provided NEMA L15-20P power cord provided
International Option 1 Phase, 220-240 VAC, 50Hz
Compressor 12,000 Btu/hr (R-404A)
Drive Motor Two - 3/4 hp
Air Flow Air cooled units require 3” (7,6 cm) air space on both sides
Plumbing Fittings Water cooled units require 1/2” N.P.T. water and drain fittings. Maximum water pressure of 130 psi. Minimum water flow rate of 3 GPM. Ideal
EWT of 50°-70°F
Hopper Volume Two - 3 gallon (11,35 liters)
Freezing Cylinder
Volume Two - 0.85 gallon (3,22 liters)

Service Manual #513659 3 Model F231
Menu Display F231
Basic Enable Control Consistency/Consistency
CutOut Consist Offset 7
CutIn Consist Offset 20
CutIn Temp 19.5 °F
CutOut Temperature 19 °F
Cycles In Serve Mode 20
Advanced Standby On Time 10 sec
Standby Off Time 360 sec
Standby Time 120 min
Stir On 15 sec
Stir Off 600 sec
Sleep 2 CutIn 33 °F
Sleep 2 CutOut 30.5 °F
Default Off Time 300 sec
Storage Storage Refrigeration Active
Storage CutIn 37.5 °F
Storage CutOut 32 °F
Storage Offset 4 °F
Storage Off Time 13 min
Storage On Time 130 sec
Storage Max On 3 min
Storage Recovery 4 min
Storage Too Warm 50 °F
Storage Too Warm 2 hr
F231
Refrigerant R-404A
Charge (W/C) 32 oz
(A/C) 42 oz
Suction Pressure
(at 72°F)
One Cylinder 18-22 psig
Both Cylinders 22-27 psig
Hopper Only 14 psig
Discharge Pressure 225-235 psig
Hot Gas Bypass
Pressure 14 psig (only hopper running)
EPR Valve 68-70 psig

Service Manual #513659 4 Model F231
* Resets any time the PUSH TO FREEZE button is pressed or a spigot is pulled. In order for the mode to change, it has to go through its normal cycles without reset. ** After the Cycles Until Sleep number is met, Serve 2 Mode goes directly into Sleep 2 Mode. Note:
1) A stir cycle will start in each mode. The cycle is independent of the freezing cycle. 2) Normal start up mode is Sleep 1 when the number of cycles is set below 99. When cycles are set higher than 99,
the freezer will start up in the Serve mode.
3) Sensor failure will keep the control in Serve and Standby modes only. 4) A freeze cycle will reset the stir cycle. 5) Serve Mode is active for the Temperature/Consistency setting and monitors CutIn Temperature. Serve 2 Mode is
active for the Consistency/Consistency setting and monitors CutIn Consistency. Both use CutOut Consistency.
Temperature
CutIn
Temperature
or
Consistency
CutOut
Consistency
Freezing Cycle
Sleep 2 CutIn
Standby
Time
Sleep 2 CutIn
Standby
On Time
Standby
Off Time
Sleep 2 Cutout
IntelliTec2™ Control Modes of Operation
Standby Mode Sleep 1 ModeServe Mode / Serve 2 Mode** Sleep 2 Mode
Cycles Until Sleep* Standb
y
Time* Sleep 2 CutIn*
PUSH TO FREEZE or Spigot Pull PUSH TO FREEZE or Spigot Pull
PUSH TO FREEZE or Spigot Pull

Service Manual #513659 5 Model F231
A. Uncrate the machine.
B. Install the four casters. Turn the threaded end
into the machine until no threads are showing. To
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 3” (7,5cm) of space on both sides
for proper circulation. (Fig. 2-1)
E. Machines that have a water cooled condenser
require 1/2” NPT supply and drain fittings.
2.4 INSTALLING PERMANENT WIRING
To install wiring follow the steps below:
A. Refer to the nameplate on the side panel of the
machine for specific electrical requirements. Make
sure the power source in the building matches
the nameplate requirements.
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.
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 la-
bels 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 periodi-
cally 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 final 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 RESPON-
SIBLE 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 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 qualified
electrician/refrigeration specialist.
Incorrect installation may cause personal injury,
severe damage to the machine and will void fac-
tory warranty.
Installation of the machine involves moving the machine
close to its permanent location, removing all crating, set-
ting in place, assembling parts, and cleaning.
Figure 2-1 Space and Ventilation Requirements

Service Manual #513659 6 Model F231
2.5 INITIAL STARTUP OF INTELLITEC2™
Before completing the following procedures, follow the
steps in Section 3 to disassemble, clean, lubricate and
sanitize the machine.
NOTE
IntelliTec2™startupmustbecompleted byatrained
authorized service provider or Stoelting distributor.
A. Locate a copy of the latest firmware file (uezimage.
rom) and service contact file (info.txt).
B. Modify the info.txt file with information from the
service company using the instructions in the file.
C. Put the firmware file and service contact file onto
the root level of a USB flash drive (do not put the
files into any folder).
D. Insert the flash drive into the USB port of the
machine.
E. Fill the mix containers in the cabinet with mix.
F. Connect power to the machine and press the
Main Power On/Off button and the Pump On/Off
buttons.
SETTING CONTACT INFORMATION
A. When the Current Status screen is displayed,
press the left arrow button to access the passcode
selection screen. Press the right arrow, SET, then
the SEL button.
B. After the password is accepted, use the arrows to
move the cursor to the Modify Settings option and
press the SEL button. Then move the cursor to
the User Preferences and press the SEL button.
C. On the User Preferences screen move the cursor
to the Contact Information USB Update and press
the SEL button.
D. The screen will change and show “File Found” for
a quick second while it updates the information.
E. After updating the contact information, the screen
will show the Service Contact Information page.
F. Press the left arrow button to go back to the Current
Status screen. Then press the right arrow to go
to the Main Menu.
NOTE
If you press the left arrow from the Current Status
screen it will ask for the password. Press the right
arrow, SET, then the SEL button.
UPDATING FIRMWARE
If the control has the latest firmware, skip this section and
go to the Motor Calibration section.
A. Move the cursor to the Utilities option and press
the SEL button. Then move the cursor to the Next
Utilities Menu and press the SEL button.
B. On the Utilities (2 of 2) screen move the cursor
to the Update IO Firmware option and press the
SEL button.
C. On the Update IO Firmware screen select the
Yes option.
D. This process will take about 4 minutes. DO NOT
INTERRUPT this upload. The control will go
through several process steps and return to the
Main Menu when the update is completed.
Figure 2-2
Figure 2-3
Figure 2-4
Figure 2-5

Service Manual #513659 7 Model F231
E. Press the left arrow button to go back to the Current
Status screen. Then press the right arrow to go
to the Main Menu.
NOTE
If you press the left arrow from the Current Status
screen it will ask for the password. Press the right
arrow, SET, then the SEL button.
MOTOR CALIBRATION
Before starting the motor calibration, be sure there is liquid
mix in the freezing cylinder.
A. Select the Utilities option, then the Next Utilities
option. Select the Unit Calibration then the Motor
Calibration option.
B. Move the cursor over the Left side and press the
SEL button then move the cursor over the Right
side and press the SEL button.
NOTE
The motor calibration can be done for both sides
simultaneously.
C. After the calibration is complete, press the Main
Power On/Off button to turn the machine off and
remove the USB flash drive.
SETTING CONTROL
A. Press the Main Power On/Off button.
B. When the Current Status screen is displayed,
press the left arrow button to access the passcode
selection screen. Press the right arrow, SET, then
the SEL button.
C. Move the cursor to the Modify Settings option
and press the SEL button. Then move the cursor
to the Time and Date option and press the SEL
button and adjust the settings as required.
1. Press the SEL button to enter the Modify Time
and Date screen.
2. Move the cursor to the setting that needs to
be changed and press the SET button.
3. Use the arrow buttons to change the setting
and press the SET button to save the change.
D. Press the Push to Freeze button and let the
machine cycle 4-5 times.
E. Draw product from the barrel immediately after
the compressor cycles off after the fifth time and
test the product for consistency and temperature.
F. Adjust the product consistency by increasing or
decreasing the CutIn Consist Offset setting.
G. If the machine short cycles (short on/off
compressor run times), change the settings as
follows:
1. If the product is too soft, increase the CutOut
Consist Offset.
2. If the product is too firm, decrease the CutIn
Consist Offset.
H. Allow the machine to cycle 3-4 more times after
making the adjustment.
I. After 3-4 cycles, draw product from the barrel
immediately after the compressor cycles on.
If the product is servable when the compressor
cycles on but it is too firm at the end of the cycle,
reduce the CutOut Consist Offset.
SETTING DISCHARGE PRESSURE ON WATER
COOLED MACHINES
A. Water cooled machines require the water
condenser valves to be adjusted to maintain
a discharge pressure of 225-235 psig. When
adjusting the discharge pressure the machine
must be under a full load with both cylinders
running and the hopper running (if applicable).
Figure 2-6
Figure 2-7

Service Manual #513659 8 Model F231

Service Manual #513659 9 Model F231
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 fitting 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 op-
erator 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.
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
first plugged in, the control defaults to the On status with
power to the hopper 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.
WARNING
High voltage will shock, burn or cause death. The
OFF-ON switch must be placed in the OFF position
prior to disassembling for cleaning or servicing. Do
not operate machine with panels removed.
Figure 3-1 Machine Controls
IntelliTec2™ Control
(See Figure 3-2) Dispense
RateAdjustor

Service Manual #513659 10 Model F231
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 technicians to select menu
options.
Set Button (SET)
The SET button is used by 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 switches.
Push to Freeze Button
Pressing the PUSH TO FREEZE button initiates “Serve
Mode”.
Clean Button
The CLEAN button initiates “Clean Mode”.
Arrow Buttons ()
The arrow buttons are used by 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.
D. MIX LOW LIGHTS
The mix low lights are located at the back of the F231.
There is a light for each freezing cylinder. A steady light
signifies a low mix condition. A blinking light signifies an
error. The light will automatically turn off when the condi-
tion has been resolved.
E. USB ACCESS PORT
The USB access port is located on the right side panel
of the machine. The port is used by technicians to import
firmware and export machine statistics.
3.3 DISASSEMBLY OF MACHINE PARTS
Before using the machine for the first time, complete
machine disassembly, cleaning and sanitizing proce-
dures 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 flights on a regular basis (Fig.
3-3) and replace as needed. Frequency of cleaning must
comply with the local health regulations.
To disassemble the machine, refer to the following steps:
A. REMOVING MIX
For the first time cleaning the machine, skip to part B.
Disassembly of Front Door.
1. Press the Clean button. After mix has melted
(about 5 minutes) open the spigot to drain the
mix.
2 Fill the hopper with 2 gallons (8 liters) of cool tap
water.
3. Press the Clean button to run the machine. After
30 seconds press the Clean button again to stop
the auger.
4. Drain the water out of the machine.
NOTE
If the water does not drain clear, repeat steps 2-4.
5. Use Stera-Sheen or equivalent sanitizing solution
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.
6. Pour the sanitizer into the hopper.
7. Using brushes provided, scrub the hopper.
8. After 5 minutes, drain the sanitizer out of the
freezing cylinder.
Figure 3-2 IntelliTec2™ Control
Wear Line
Figure 3-3 Auger Flight Wear

Service Manual #513659 11 Model F231
B. DISASSEMBLY OF FRONT DOOR
1. Turn the machine off by pressing the Main Freezer
Power Off/On button on the IntelliTec2™ control.
2. Remove the knobs on the front door.
3. Remove the front door by pulling it off the studs.
4. Remove the spigot through the bottom of the front
door.
5. Remove all o-rings from parts by first 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.
C. DISASSEMBLY OF 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 flights 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 flights.
3.4 CLEANING DISASSEMBLED PARTS
Disassembled machine 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. Prepare Stera-Sheen or equivalent cleaner in
2 gallons of 90° to 110°F (32° to 43°C) water
following manufacturers instructions. Place all
parts in the solution and clean with provided
brushes.
B. Rinse all parts with clean 90° to 110°F (32° to
43°C) water.
C. Wash the hopper and freezing cylinder with the
Stera-Sheen solution and brushes provided.
D. Clean the rear seal surfaces from the inside of the
freezing cylinder with the Stera-Sheen Solution.
3.5 SANITIZING MACHINE PARTS
A. Use Stera-Sheen or equivalent sanitizing solution
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) Stera-Sheen solution or equivalent
cleaner and wipe dry.
Do not use highly abrasive materials, as they will mar the
finish. Use a soft cloth or sponge to apply the solution.
For best results, wipe with the grain of the steel.
A. Clean the rear seal surface from inside of the
freezing cylinder.
Figure 3-4 Removing O-Ring
Figure 3-5 Rear Seal Assembly

Service Manual #513659 12 Model F231
B. Using sanitizing solution and the large barrel
brush provided, sanitize the freezing cylinder by
dipping the brush in the sanitizing solution and
brushing the inside of the freezing cylinder.
NOTE
Do not let sanitizing solution sit overnight in the
freezing cylinder.
C. Remove the drip tray by pulling from the front
panel. Clean and replace the drip tray.
3.7 ASSEMBLING MACHINE
To assemble the machine parts, refer to the following steps:
NOTICE
Petrol-Gel sanitary lubricant or equivalent must be
usedwhenlubricationofmachine parts is specified.
NOTICE
The United States Department of Agriculture and
theFoodandDrugAdministrationrequirethatlubri-
cants used on food processing equipment be certi-
fied 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 film of sanitary
lubricant to exposed surfaces of the o-rings.
B. Lubricate the rear seal area on the auger shaft
with a thin layer of sanitary lubricant. Install the
rear seal o-ring. Lubricate the outside of the rear
seal o-ring with sanitary lubricant.
C. Lubricate the inside metal surface of the rear
seal and install it onto the auger shaft. DO NOT
lubricate the outside of the rear auger seal (Fig.
3-6).
D. Lubricate the hex drive end of the auger with a
small amount of spline lubricant.Asmall container
of spline lubricant is shipped with the machine.
E. Screw the springs onto the studs in the plastic
flights. The springs must be screwed into the
flights completely to provide proper compression.
F. Install the two plastic flights onto the rear of the
auger and insert it part way into the freezing
cylinder.
G. Install the remaining plastic flights, 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. Apply a thin layer of sanitary lubricant to the
o-rings on the spigot body and install the spigot
body through the bottom of the front door.
K. Apply a thin film of sanitary lubricant to the door
seal o-ring and fit it 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 finger
tight. Do not overtighten. A proper o-ring seal can
be observed through the transparent front door.
3.8 SANITIZING
Sanitizing must be done after the machine is clean and
just before the machine is filled 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 certified for this use.
When sanitizing the machine, refer to local sanitary regu-
lations 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 quanti-
ties 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.
Figure 3-6 Lubricate Rear Seal