Taylor C602 User manual

Model C602
Combination Shake /
Soft Serve Freezer
Service Manual
057888-S
4/6/04

Table of Contents Model C602
Table of Contents
Section 1: Introduction 1...............................................
Safety 2.............................................................
Refrigerant 2.........................................................
Model C602 Specifications 4...........................................
Installation Instructions 5...............................................
Section 2: Systems, Controls and Operations 7..........................
Running Specifications 8...............................................
Refrigeration System Schematic 9......................................
Control Panel Functions 10..............................................
Freezer Lock-Out 14...................................................
Heat Treatment Cycle 33...............................................
Heat Treatment Graph 34...............................................
Timers 35.............................................................
Glycol System 37......................................................
Glycol Path 39.........................................................
Setting Viscosity 40....................................................
Portion Control (Shake) 41..............................................
Adjustable Draw Handle 42.............................................
Control Overview 43....................................................
Universal Control (UVC3) 44............................................
Electrical System Modes of Operation Chart 47............................
Electrical System - L1 Power Path 48.....................................
Shake Draw Sequence Chart 50.........................................
Syrup Delivery 51......................................................
Syrup Calibration 52....................................................
Shake Dispensing Alignment Procedure 54................................

Model C602 Table of Contents
Table of Contents - Page 2
Section 3: Troubleshooting 57...........................................
General Troubleshooting Guide 58.......................................
Air Mix Pump System Troubleshooting 63.................................
Peristaltic Syrup System Troubleshooting Guide 64........................
Shake Dispensing Mechanism Troubleshooting 67.........................
Shake Portion Control Troubleshooting 69................................
Bacteria Troubleshooting 70.............................................
Section 4: Parts 73......................................................
Warranty Explanation 74................................................
Main Exploded View 76.................................................
Syrup Cabinet View 79.................................................
Mix Pump & Tubes 80..................................................
Pump A. - Mix Simplified Shake - X57028-XX 81...........................
Pump A. - Mix Simplified Soft Serve - X57029-XX 82.......................
Brush Identification 83..................................................
Control Assembly - X55966-33 84........................................
Dec Plate Assembly - X55963 86........................................
Torque Coupling Assembly - X54722 87..................................
Glycol Heater Assembly - X55965-27 88..................................
Sensor Holder Assembly - X55980 89....................................
Parts List 90...........................................................
Wiring Diagrams 110....................................................
CAUTION: Information in this manual is intended to be used by Taylor Authorized
Service Technicians only.
Note: Continuing research results in steady improvements; therefore, information
in this manual is subject to change without notice.
EApril, 2004 Taylor
All rights reserved.
057888-S

1
Model C602 Introduction
Section 1: Introduction
SSafety
SRefrigerant
SSpecifications
SInstallation Instructions

2
Introduction Model C602
Safety
______________________________
We at Taylor Company, are committed to
manufacturing safe operating and serviceable
equipment. The many built-in safety features that
are part of all Taylor equipment are aimed at
protecting operators and trained service technicians
alike.
This manual is intended exclusively for Taylor
Company authorized service personnel.
Stationary appliances which are not
equipped with a power cord and a plug or other
device to disconnect the appliance from the power
source must have an all-pole disconnecting device
with a contact gap of at least 3 mm installed in the
external installation.
Thismachinemustbeplacedonalevel
surface. Failure to comply may result in personal
injury or equipment damage.
DO NOT installthemachineinanarea
where a water jet could be used to clean or rinse the
freezer. Failure to follow this instruction may result in
serious electrical shock.
DO NOT remove the door, beater, scraper
blades, drive shaft or air/mix pump unless all control
switches are in the OFF position. Failure to follow
this instruction may result in severe personal injury
from hazardous moving parts.
This machine is designed to operate indoors, under
normal ambient temperatures of 70°-75°F
(21°-24°C). The machine has successfully
performed in high ambient temperatures of 104°F
(40°C) at reduced capacities.
NOISE LEVEL: Airborne noise emission does not
exceed 78 dB(A) when measured at a distance of
1.0 meter from the surface of the machine and at a
height of 1.6 meters from the floor.
Refrigerant
______________________________
Taylor Company uses R404A refrigerant. This
refrigerant is generally considered non-toxic and
non-flammable; however, any gas under pressure is
potentially hazardous.
NEVER fill any refrigerant cylinder
completely with liquid. Filling the cylinder to
approximately 80% will allow for normal expansion.
Refrigerant liquid sprayed onto the skin may
cause serious damage to tissue. Keep eyes and skin
protected. If refrigerant burns should occur, flush
immediately with cold water. If burns are severe,
apply ice packs and contact a physician
immediately.
The Taylor Company reminds technicians to be
cautious of government laws regarding
refrigerant recovery, recycling, and reclaiming
systems. If you have any questions regarding
these laws, please contact the factory Service
Department.
WARNING: R404A refrigerant used in conjunction
with polyolester oils is extremely moisture
absorbent. When opening a refrigeration system, the
maximum time the system is open must not exceed
15 minutes. Cap all open tubing to prevent humid air
or water from being absorbed by the oil.

3
Model C602 Introduction
Compressor Warranty Disclaimer
______________________________
The refrigeration compressor(s) on this machine are
warranted for the term indicated on the warranty
card accompanying this machine. However, due to
the Montreal Protocol and the U.S. Clean Air Act
Amendments of 1990, many new refrigerants are
being tested and developed; thus seeking their way
into the service industry. Some of these new
refrigerants are being advertised as drop-in
replacements for numerous applications. It should
be noted that, in the event of ordinary service to this
machine’s refrigeration system, only the refrigerant
specified on the affixed data label should be used.
The unauthorized use of alternate refrigerants will
void your compressor warranty. It will be the owners’
responsibility to make this fact known to any
technicians they employ.
It should be noted, that Taylor does not warrant the
refrigerant used in its equipment. For example, if the
refrigerant is lost during the course of ordinary
service to this machine, Taylor has no obligation to
either supply or provide its replacement either at
billable or unbillable terms. Taylor does have the
obligation to recommend a suitable replacement if
the original refrigerant is banned, obsoleted, or no
longer available during the five year warranty of the
compressor.
The Taylor Company will continue to monitor the
industry and test new alternates as they are being
developed. Should a new alternate prove, through
our testing, that it would be accepted as a drop-in
replacement, then the above disclaimer would
become null and void. To find out the current status
of an alternate refrigerant as it relates to your
compressor, call the local Taylor Distributor or the
Taylor Factory. Be prepared to provide the
model/serial number of the unit in question.

4
Introduction Model C602
Model C602 Specifications
Freezing Cylinders
Shake Side: One, 7 quart (6.6 liter)
Soft Serve: One, 3.4 quart (3.2 liter)
Mix Hopper
Two, 20 quart (18.9 liter). Refrigerated to maintain
mix below 41°F (5°C).
Beater Motor
Shake: 1.0 HP
Soft Serve: 1.5 HP
Refrigeration System
Shake: 11,000 BTU/hr
Soft Serve: 9,500 BTU/hr
Refrigerant: R404A (BTU’s may vary depending on
compressor used.)
Main Compressor:
Air Cooled Units:
Shake: 54 oz (1,531 g) of R404A
Soft Serve: 46 oz (1,304 g) of R404A
Water Cooled Units:
Shake: 48 oz (1,361 g) of R404A
Soft Serve: 32 oz (907 g) of R404A
Note: Specifications are subject to change. Check
the data label for proper charging specifications.
Electrical
Standard is 208/230-60-3; however, other electrical
characteristics are available. Each unit requires
electrical service - Three Phase Maximum Fuse
Size: 40 A, Minimum Wire Ampacity: 36 A
Note: McDonald’s specifies Hubbell A460P9 plug
for 208-230/60-3 equipment.
Air Cooled
Clearance: A minimum of 3” (76 mm) is required
around all sides. Install the deflector provided to
prevent recirculation of warm air. Minimum air
clearances must be met to assure adequate air flow
for optimum performance.
Dimensions
Width: 25-1/4” (641 mm) including cup/cone
dispenser: 32-3/8” (822 mm)
Height: 60-7/16” (1535 mm)
Depth: 38-7/8” (987 mm)
Floor Clearance: 4-3/4” (121 mm)
Approximate Weights
Net: 815 lbs. (369.7 kgs)
Crated: 1046 lbs. (474.5 kgs)
Volume: 66.5 cu ft (1.88 cu m)
Figure 1

5
Model C602 Introduction
Installation Instructions
Thismachinemustbeplacedonalevel
surface. Failure to comply may result in personal
injury or equipment damage.
DO NOT installthemachineinanarea
where a water jet could be used to clean or rinse the
freezer. Failure to follow this instruction may result in
serious electrical shock.
Disconnect Switch
Stationary appliances which are not
equipped with a power cord and a plug or other
device to disconnect the appliance from the power
source must have an all-pole disconnecting device
with a contact gap of at least 3 mm installed in the
external installation.
Air Cooled Units
These units require a minimum of 3” (76 mm) of air
clearance around all sides. Install the deflector
provided to prevent recirculation of warm air.
Minimum air clearances must be met to assure
adequate air flow for optimum performance.
Gear Alignment and Rear Shell Bearing
1. Make certain the drive shaft can easily slide in
and out of the female socket on the gear unit.
2. If a drive shaft is binding, the gear unit could be
out of alignment (loose). Check the bolts on the
gear unit to be sure they are tight.
3. Inspect the rear shell bearing for tightness. Be
sure the locking tab has been folded over to
prevent the nut from loosening.
Note: If the gear unit is out of alignment, refer to
the General Service Manual.
Beater Rotation
REMEMBER TO DISCONNECT ALL
POWER TO THE FREEZER! Failure to follow this
instruction may result in electrocution.
Beater rotation = CLOCKWISE (when viewed from
the front of the machine).
Note: This machine is equipped with an interlock
circuit that prevents beater motor operation when
the freezer door is not installed.
1. Remove the side panels.
2. Place the power switch in the ON position.
3. Select the WASH key on the control panel. This
activates the beater motor only.
CAUTION: Hazardous moving
components! Keep your hands clear when
operating the machine with the panels
removed. Failure to follow this instruction may
result in severe personal injury from hazardous
moving parts.
4. Check the rotation of the drive coupling located
on the output shaft of the gear reducer. The
coupling should be turning CLOCKWISE as
viewed from the front of the machine.
5. Press the WASH key again to stop the beater
motor.
If rotation is not correct, exchange any two incoming
power lines at the freezer main terminal box only
(splice box).
REMEMBER TO DISCONNECT ALL
POWER TO THE FREEZER! Failure to follow this
instruction may result in electrocution.

6
Introduction Model C602
Pump Motor Rotation
1. Remove the air/mix pump assembly.
2. Connect power to the freezer and place the
power switch in the ON position.
3. Press the PUMP key on the control panel. This
will activate the pump motor only.
4. Observe the pump ball crank. It should be
rotating counterclockwise.
If rotation is not correct, refer to the wiring diagram
on the pump motor and re-wire accordingly.
REMEMBER TO DISCONNECT ALL
POWER TO THE FREEZER! Failure to follow this
instruction may result in electrocution.
Electrical Connections
Each freezer requires one power supply. Check the
data label on the freezer for fuse, circuit ampacity
and electrical specifications. Refer to the wiring
diagram, provided inside the control box, for proper
power connections.
In the United States, this equipment is intended to
be installed in accordance with the National
Electrical Code (NEC), ANSI/NFPA 70-1987. The
purpose of the NEC code is the practical
safeguarding of persons and property from hazards
arising from the use of electricity. This code contains
provisions considered necessary for safety.
Compliance therewith and proper maintenance will
result in an installation essentially free from hazard!
In all other areas of the world, equipment should be
installed in accordance with the existing local codes.
Please contact your local authorities.
Stationary appliances which are not equipped with a
power cord and a plug or other device to disconnect
the appliance from the power source must have an
all-pole disconnecting device with a contact gap of at
least 3 mm installed in the external installation.

7
Model C602 Systems, Controls and Operations
Section 2:
Systems, Controls and Operations
SRunning Specifications
SRefrigeration System Schematic
SControl Panel Functions
SFreezer Lock-Out
SHeat Treatment Cycle
SHeat Treatment Graph
STimers
SAdjustable Draw Handle
SBeater Stir Cycles
SGlycol System
SGlycol Path
SSetting Viscosity
SPortion Control (Shake)
SControl Overview
SElectrical System Modes of Operation Chart
SElectrical System - L1 Power Path
SShake Draw Sequence Chart
SSyrup Delivery
SSyrup Calibration
SShake Draw Mechanism Alignment

8
Systems, Controls and Operations Model C602
Running Specifications
Pressures/Temperatures
The following are the Taylor Company
recommended settings for various components in
the Model C602. (See page 9 for the Refrigeration
System Schematic.)
Expansion Valve
Soft Serve
Air Cooled: 20 - 22 psi. (138 - 152 kPa)
Water Cooled: 20 - 22 psi. (138 - 152 kPa)
for a normal product of 16_-18_F. (-8.8_to -7.7_C).
Shake
Air Cooled: 38 - 39 psi. (262 - 269 kPa)
Water Cooled: 38 - 39 psi. (262 - 269 kPa
for a normal product of 24_-26_F. (-4_C).
Note: Triple Thick Shake product temperature is
22_-24_F. (-5_C).
Expansion Valve Adjustment
Connect your refrigerant gauge to the low side
access valve. Turn the access valve
counter-clockwise to open the valve.
Adjust the pressure higher or lower by turning the
expansion valve adjustment screw. Clockwise turns
will raise the pressure and counterclockwise will
lower the pressure.
Note: Make expansion valve adjustments with mix
in the freezing cylinder and the freezer in the AUTO
mode. Be sure to allow adequate time for the
pressure to stabilize.
Turn the access valve clockwise to close the valve.
Install and securely tighten the access valve caps
and the expansion valve cap.
Low Side (Suction)
Suction pressure equals expansion valve setting.
High Side (Discharge)
High side pressure varies for air cooled units,
depending on the ambient temperature.
Ambient Temperature Normal Operating Head
Pressures
F C PSI
70_21.1_240 - 270
(1,655 - 1,862 kPa)
80_26.7_270 - 300
(1,862 - 2,069 kPa)
90_32.2_300 - 340
(2,069 - 2,344 kPa)
100_37.8_340 - 380
(2,344 - 2,620 kPa)
Water Valve
On a water cooled unit, the water valve should be
set to maintain a compressor head pressure of 255
psi. (1,758 kPa).
Water Valve Adjustment
Note: Make this adjustment with mix in the cylinder
and the freezer in the AUTO mode. Be sure to allow
adequate time for pressure to stabilize.
Connect your refrigerant gauge to the high side
access valve. Turn the access valve counter-
clockwise to open the valve. Turning the adjustment
stem on the water valve clockwise will lower the
pressure.
Turn the access valve clockwise to close the valve.
Install and securely tighten the access valve caps.

9
Model C602 Systems, Controls and Operations
Refrigeration System Schematic
Figure 2

10
Systems, Controls and Operations Model C602
Control Panel Functions
Figure 3
ITEM DESCRIPTION FUNCTION
1Keypad-Shake Used for selecting operating functions on the shake side of the machine.
2Display-Vacuum
Fluorescent Menu (VFD)
Screen which displays menu options and notifies operator if a fault is
detected.
3Keypad-Menu (Entry/Exit) Used to select the Manager or Service Menu or to exit the Menu Display.
4Keypad-Soft Serve Used for selecting operating functions on the soft serve side of the
machine.
5Standby-Soft Serve Indicates when the soft serve side is in the Standby mode.
6Standby-Shake Indicates when the shake side is in the Standby mode.
7Keypad-Topping Heater Used to activate the topping rail heaters.
8Display-LED Dual (Brush
Clean Countdown)
Displays the number of days before brush cleaning is required.
9Keypad-Flavor Select Used for selecting the desired shake flavor to be dispensed. Also used
for opening and closing the draw valve when cleaning, sanitizing, and
priming the shake side.
10 Switch-Power When placed in the ON position, allows control panel operation.
11 Keypad-Calibrate Menu Used to access the Calibrate Menu containing options for calibrating the
syrup dispensing rate or priming and flushing the syrup lines.
12 Indicator Light-Mix Low Illuminates when the mix hopper has a low supply of mix and should be
refilled as soon as possible.
13 Indicator Light-Mix Out Illuminates when the mix hopper has an insufficient supply of mix to
operate the freezer. The Auto mode will be locked out and the machine
will be placed in the Standby mode.

11
Model C602 Systems, Controls and Operations
Symbol Definitions
To better communicate in the International arena,
the words on many of our operator keys have been
replaced by symbols to indicate their functions. Your
Taylor equipment is designed with these
International symbols.
The following chart identifies the symbol definitions.
=AUTO
= HEAT CYCLE
= WASH
=MIXPUMP
= STANDBY (SHAKE)
= STANDBY (SOFT SERVE)
= FLAVOR SELECTION
=MIXLOW
= MIX OUT
= TOPPING HEATER-LEFT
= TOPPING HEATER-RIGHT
=CALIBRATE
= MENU DISPLAY
Power Switch
When placed in the ON position, the power switch
allows control panel operation.
Vacuum Fluorescent Display
The vacuum fluorescent display (VFD) is located on
the front control panel. During normal operation the
display is blank. The display is used to show menu
options and notifies the operator if a fault is
detected. On International models, the display will
indicate the temperature of the mix in each hopper.
Indicator Lights
MIX LOW - When the MIX LOW symbol is
illuminated, the mix hopper has a low supply of mix
and should be refilled as soon as possible.
MIX OUT - When the MIX OUT symbol is
illuminated, the mix hopper has been almost
completely exhausted and has an insufficient supply
of mix to operate the freezer. At this time, the AUTO
mode is locked out and the freezer will be placed in
the STANDBY mode. To initiate the refrigeration
system, add mix to the mix hopper and touch the
AUTO symbol . The freezer will automatically
begin operation.

12
Systems, Controls and Operations Model C602
Heat Mode Symbol
When the HEAT MODE symbol is illuminated,
the freezer is in the process of a heat cycle. The
heat mode symbol may be selected to start a heat
cycle following a freezer soft lock condition.
For some International models, the heat symbol can
be selected to manually start a heat cycle at any
time.
Brush Clean Countdown - Displays the number of
days before the next brush cleaning is required.
When the display has counted down to “1”, the
machine must be disassembled and brush cleaned
within 24 hours.
Power Up
When the machine is powered the control system
will initialize to perform a system check. The screen
will display “INITIALIZING”. There will be four types
of data the system will check: LANGUAGE,
SYSTEM DATA, CONFIG DATA, and LOCKOUT
DATA.
During the INITIALIZING... LANGUAGE screen, the
alarm will be on. If the system detects corrupt data
during INITIALIZING, the following display will alert
the operator that the control settings may have been
changed (See Figure 4.)
SERVICE REQ’D
NVRAM FAULT
RESET TO DEFAULTS
< PRESS TO CLEAR
Figure 4
Once the system has initialized, the number of days
remaining before the next required brush cleaning is
indicated on the control panel and the SAFETY
TIMEOUT screen is displayed with the alarm turned
on. (See Figure 5.)
SAFETY TIMEOUT
ANY KEY ABORTS
Figure 5
The SAFETY TIMEOUT screen will be displayed
with the alarm on, for 60 seconds or until any control
symbol is selected.
After the safety timeout has been completed and the
power switch is OFF, the following screen is
displayed. (See Figure 6.)
POWER SWITCH OFF
=-=-=-=-=-=-=-
UNIT CLEANED
Figure 6
Power Switch ON
When the power switch is placed in the ON position,
the control panel touch keys become operative. The
VFD will be either blank or indicate that the unit has
been cleaned. (See Figure 7.)
UNIT CLEANED
Figure 7
Display for International Models Only:
Some International models will continuously display
the temperature of each mix hopper when the power
switch is in the ON position. (See Figure 8.)
HOPPERS 21.0 21.1
UNIT CLEANED
Figure 8

13
Model C602 Systems, Controls and Operations
Heat Cycle
The HEAT symbols on the control panel are
illuminated throughout the heat treatment cycle. Two
warning messages will be displayed on the screen.
“DO NOT DRAW” will be displayed when the mix
temperature is below 130°F (54.4°C). (See
Figure 9.)
L: DO NOT DRAW
R: DO NOT DRAW
Figure 9
When the temperature of the mix is above 130°F
(54.4°C) the screen will display a message
indicating that HOT PRODUCT is in the machine.
(See Figure 10.)
L: HOT PRODUCT
R: HOT PRODUCT
Figure 10
DO NOT attempt to draw product or
disassemble the unit during the HEAT cycle. The
product is hot and under extreme pressure.
In the HEAT cycle, the mix temperature in the
hoppers and freezing cylinders must be raised to
151°F (66.1°C) within 90 minutes.
When the heating phase is complete, the freezer
goes into the holding phase of the cycle. The holding
phase will keep the temperature above 151°F
(66.1°C) for a minimum of 30 minutes.
The final phase of the heat treatment cycle is the
cooling phase. The freezer must cool the mix below
41°F (5°C) within two hours.
When the entire heat cycle has been completed, the
HEAT symbols will no longer be illuminated. The
machine will enter the STANDBY mode (STANDBY
symbols and illuminate). The machine can be
placed in AUTO or left in STANDBY.

14
Systems, Controls and Operations Model C602
Freezer Lock-Out
Heat Cycle Failure Messages
To comply with health codes, heat treatment system
freezers must complete a heat treatment cycle
daily, and must be disassembled and brush cleaned
a minimum of every 14 days. Brush cleaning is the
normal disassembly and cleaning procedure found in
the Operator Manual. Failure to follow these
guidelines will cause the control to lock the freezer
out of the AUTO mode.
Always comply with local guidelines for the
maximum number of days allowed between brush
clean cycles. (See the Manager/Service Menu for
setting the Brush Clean interval, on page 21.)
If the Heat Treatment Cycle fails, the VFD will
display a failure message and return the freezer to
the STANDBY mode. A “lock” is defined as a special
STANDBY mode of operation which does not allow
the machine to operate in the AUTO mode.
There are two types of freezer lock conditions that
can occur: Hard Lock or Soft Lock. A Hard Lock
requires the machine be disassembled and brush
cleaned. A Soft Lock can be corrected by either
disassembling and brush cleaning the machine, or
by starting another heat treatment cycle.
Hard Lock: There are two causes of a hard lock
failure:
1. The brush clean timer has elapsed (maximum
setting of 14 days). (See Figure 11.)
BRUSH CLEAN TIMEOUT
FREEZER LOCKED
CLEANING REQ’D
WASH TO BRUSH CLEAN
Figure 11
Selecting the WASH symbol will display the
following screen. (See Figure 12.)
FREEZER LOCKED
Figure 12
2. There has been a thermistor failure (freezing
cylinder, hopper, or glycol) during the heat
treatment process. (See Figure 13.)
SYSTEM FAULT
FREEZER LOCKED
SERVICE REQ’D
< PRESS TO CLEAR
Figure 13
Selecting the CALIBRATE symbol will indicate
which thermistor caused the Hard Lock. (See
Figure 14.)
L: HOPPER THERM BAD
FREEZER LOCKED
Figure 14
If the machine has hard locked and an attempt is
made to enter AUTO, the machine will enter the
STANDBY mode and display the following message.
(See Figure 15.)
FREEZER LOCKED
Figure 15

15
Model C602 Systems, Controls and Operations
To restore the message that identified the reason for
the hard lock, turn the power switch OFF for five
seconds and then return the power switch to the ON
position. The original message with the reason for
the Hard Lock will be displayed. The FAULT
DESCRIPTION can also be found in the Manager or
Service Menu (See page 22.)
The FREEZER LOCKED message will remain on
the display until the brush clean requirements are
fulfilled. The freezer must be disassembled in order
to activate the five minute timer on the display
screen. Once the timer counts down to zero, the
lockout is cleared.
Soft Lock: If a heat treatment cycle has not been
initiated within the last 24 hours, a soft lock failure
will occur. A soft lock allows the operator to correct
the cause of the soft lock. The operator has the
option of either starting another heat cycle or brush
cleaning the machine. When a soft lock occurs, the
machine will go into the STANDBY mode. The
following message is displayed on the screen. The
reason for the soft lock is indicated on the second
line. (See Figure 16.)
HEAT TREAT FAILURE
REASON
HEAT FOR HEAT CYCLE
WASH TO BRUSH CLEAN
Figure 16
If the reason for the soft lock has been corrected,
selecting the HEAT symbol initiates a Heat Cycle
immediately. Selecting the WASH symbol when
the above message is displayed will hard lock the
machine and brush cleaning will be necessary.
Reasons For Soft Lock
Following are the variable messages for soft lock
failures that appear on the second line of the screen.
Power Switch Off
This soft lock will occur if the power switch is in the
OFF position and greater than 24 hours have
passed since the start of the 14 day timer, or the
start of the last successful Heat Treatment Cycle.
Mix Out
This soft lock will occur if one or both sides has a
mix out condition and greater than 24 hours have
passed since the start of the 14 day timer or the
start of the last successful Heat Treatment Cycle.
Auto or Standby Off
This soft lock will occur if one or both sides is in the
OFF mode and greater than 24 hours have passed
since the start of the 14 day timer or the start of the
last successful Heat Treatment Cycle.
No Heat Cycle Tried
No Heat Treatment Cycle was performed in the 24
hours after the start of the 14 day timer, or the start
of the last successful Heat Treatment Cycle. (AUTO
HEAT TIME was advanced,a power loss was
experienced at the time the cycle was to occur, or a
heat cycle failure not due to a thermistor failure.)

16
Systems, Controls and Operations Model C602
If the following screen appears, a soft lock has
occurred during the heat treatment cycle.
(See Figure 17.)
HEAT TREAT FAILURE
FREEZER LOCKED
HEAT FOR HEAT CYCLE
WASH TO BRUSH CLEAN
Figure 17
A soft lock can also occur any time during operation
when the hopper or freezing cylinder temperature
rises above 59°F (15°C), or the temperature rises
and remains above 41°F(5°C) for more than four
hours. If a PRODUCT OVER TEMPERATURE
condition occurs during operation, the following
screen will appear. (See Figure 18.)
PRODUCT OVER TEMP
HEAT FOR HEAT CYCLE
WASH TO BRUSH CLEAN
Figure 18
When one of these messages appears, automatic
freezer operation cannot take place until the freezer
is disassembled and brush cleaned, or has
completed a heat treatment cycle. Select the HEAT
symbol to start a heat cycle, or select the WASH
symbol to disassemble and brush clean the
machine.
Once the freezer is unlocked by starting a heat
treatment cycle the HEAT symbol will illuminate
and the following message will be displayed on the
screen. (See Figure 19.)
L: DO NOT DRAW
R: DO NOT DRAW
Figure 19
If the WASH symbol is selected to clear the
lockout by brush cleaning the machine, the
FREEZER LOCKED message will remain on the
display until the brush clean requirements are
fulfilled. The freezer must be disassembled in order
to activate the five minute timer on the display
screen. Once the timer counts down to zero, the
lockout is cleared. (See Figure 20.)
FREEZER LOCKED
Figure 20
To restore the message that identified the reason for
the soft lock, turn the power switch OFF for five
seconds, and then return the power switch to the
ON position. The original message with the reason
for the soft lock will be displayed. (See Figure 21.)
HEAT TREAT FAILURE
REASON
HEAT FOR HEAT CYCLE
WASH TO BRUSH CLEAN
Figure 21
The FAULT DESCRIPTION can also be found in the
Manager and Service Menus. (See page 22.)
Note: A record of Heat Cycle Data and Lock Out
History can be found in the Manager and Service
Menus. (See page 23.)

17
Model C602 Systems, Controls and Operations
Service Menu
______________________________
The Service Menu option allows a trained service
technician to access and modify critical operating
parameters for the machine. All the menu screens
found in the Manager’s Menu are also included in
the Service Menu. To access the menu, touch the
center of the CONE symbol.
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Figure 22
The shake AUTO symbol , the OPTIONAL
FLAVOR symbol and the CONE symbol will
be illuminated when the ACCESS CODE screen is
displayed.
In the Menu program, the shake side AUTO symbol
, OPTIONAL FLAVOR symbol , and
CALIBRATION symbol will function as menu
keys.
AUTO - increases the value above the cursor
and used to scroll upward in text displays
OPTIONAL FLAVOR - decreases the value
above the cursor and used to scroll downward in text
displays.
CALIBRATION - advances the cursor position to
the right and is used to select menu options.
Note: You will not be able to dispense shakes while
accessing the Service Menu options, except when
the CURRENT CONDITIONS screen is displayed.
The soft serve side will continue operation in the
mode it was in when the Menu was selected.
However, the soft serve side control keys will not be
illuminated and are non-functional when a menu
screen is displayed. The control keys for both sides
are only functional when the CURRENT
CONDITIONS screen is displayed.
Entering Access Code
With the ACCESS CODE screen on the display use
the AUTO or OPTIONAL FLAVOR symbols
to set the first code number in the cursor position.
When the correct number is selected, touch the
CALIBRATION symbol to move the cursor to the
next number position.
The access code for the Service Menu is 5231.
The access code for the Operator Menu is 8309.
(See Figure 23.)
ENTER ACCESS CODE
5231
_
Figure 23
Continue to enter the proper access code numbers
until all four numbers are displayed, and then touch
the CALIBRATION symbol . The Service Menu
list will display on the screen, provided the correct
access code is entered.
If an incorrect number is entered for the access
code, the display will exit the Menu program when
the CALIBRATION symbol is selected. (See
Figure 24.)
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Figure 24