Manitowoc SN20, SN12 User Manual

Manitowoc

Nugget Ice Machines

Installation, Use & Care Manual

This manual is updated as new information and models are released.

America’s #1 Selling Ice Machine

Part Number 000005544 12/09

SN12, SN20 Model

Visit our website for the latest manual. www.manitowocice.com

Safety Notices

! Warning

!

Caution

Important

!

Caution

Important

! Warning

As you work on Manitowoc equipment, be sure to pay
close attention to the safety notices in this manual.
Disregarding the notices may lead to serious injury and/
or damage to the equipment.

Throughout this manual, you will see the following types
of safety notices:

Text in a Warning box alerts you to a potential
personal injury situation. Be sure to read the
Warning statement before proceeding, and work
carefully.

Text in a Caution box alerts you to a situation in
which you could damage the equipment. Be sure to
read the Caution statement before proc eeding, and
work carefully.

Procedural Notices

As you work on Manitowoc equipment, be sure to read
the procedural notices in this manual. These notices
supply helpful information which may assist you as you
work.

Throughout this manual, you will see the following types
of procedural notices:

Read These Before Proceeding:

Proper installation, care and maintenance are
essential for maximum performance and trouble­free operation of your Manitow oc equipment. Read
and understand this manual. It contains valuable
care and maintenance information. If you encounter
problems not covered by this manual, do not
proceed, contact Manitowoc Foodservice. We will
be happy to provide assistance.

Routine adjustments and maintenance procedures
outlined in this manual are not covered by the
warranty.

PERSONAL INJURY POTENTIAL

Do not operate equipment that has been misused,
abused, neglected, damaged, or altered/modified
from that of original manufactured specifications.

NOTE: SAVE THESE INSTRUCTIONS.

Text in an Important box provides you with
information that may help you perform a procedure
more efficiently. Disregarding this information will
not cause damage or injury, but it may slow you
down as you work.

NOTE: Text set off as a Note provides you with simple,
but useful, extra information about th e pr oce dur e yo u
are performing.

We reserve the right to make product improvements at any time.

Specifications and design are subject to change without notice.

Section 1
General Information

Model Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Model/Serial Number Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Flake/Chiplet/Nugget Commercial Ice Machine Warranty . . . . . . . . . . . . . . . . 1-3

Residential Ice Machine Limited Warrant y . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Section 2
Installation Instructions

Ice Machine Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Location of Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Ice Machine Clearance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Electrical Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Water Supply and Drains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Before Starting the Ice Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Table of Contents

Section 3
Ice Machine Operation

Component Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Operational Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

SafeGuards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Removal from Service/Winterization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Section 4
Maintenance

Cleaning and Sanitizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Manitowoc’s Cleaning Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Component Disassembly For Cleaning/Sanitizing . . . . . . . . . . . . . . . . . . . . . . 4-7

Section 5
Before Calling For Service

Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Safeguard Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

SafeGuard Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Part Number 000005544 12/09 1

Table of Contents (continued)

THIS PAGE INTENTIONALLY LEFT BLANK

2 Part Number 000005544 12/09

Section 1 General Information

!

Warning

Section 1

General Information

Model Numbers

This manual covers the following models:

Lever Activated

SN012A

Self Contained Air-Cooled

Nugget Ice Machine

SN020A

Self Contained Air-Cooled

Nugget Ice Machine

Do not operate equipment that has been misused,
abused, neglected, damaged, or altered/modified
from that of original manufactured specifications.

This appliance is not intended for use by persons
(including children) with reduced physical, sensory
or mental capabilities, or lack of experience and
knowledge, unless they have been given
supervision concerning use of the appliance by a
person responsible for their safety.

T ouchless Sensor

Activated

SN012AT

Self Contained Air-Cooled

Nugget Ice Machine

SN020AT

Self Contained Air-Cooled

Nugget Ice Machine

Accessories

MANITOWOC CLEANER AND SANITIZER

Manitowoc Ice Machine Cleaner and Sanitizer are
available in convenient 16 oz. (473 ml) and 1 g al (3.7 8 l)
bottles. These are the only cleaner and sanitizer
approved for use with Manitowoc products.

Cleaner Part Number Sanitizer Part Number

16 oz. 000000084

LEGS

Optional four inch adjustable legs are available.

TOUCHLESS SENSING OPTION

Touchless sensing ca n be ordered installed on the ice
machine from the factory or a field conversion kit is
available. The field conversion kit includes a
replacement front panel and instructions for installation.

16 oz. 94-0565-3
1 Gallon 94-0581-3

Part Number 000005544 12/09 1-1

General Information Section 1

MODEL / SERIAL

NUMBER DECALS

FRONT

(Panel Removed)

BACK PANEL

Model/Serial Number Location

These numbers are required when requesting
information from your local Manitowoc distributor,
service representative, or Manitowoc Foodse rv ice.
Record the model and serial number of your ice machine
in the space provided below.

The model and serial number are listed on the OWNER
WARRANTY REGISTRATION CARD. They are also
listed on the MODEL/SERIAL NUMBER DECAL affixed
to the ice machine head section and condensing unit.

Ice Machine

Model Number

Serial Number

1-2

Model/Serial Number Location

Part Number 000005544 12/09

Section 1 General Information

Flake/Chiplet/Nugget Commercial Ice Machine Warranty

Manitowoc Ice, Inc. (hereinafter referred to as the "COMPANY") warrants for a period of twentyfour months from the
installation date (except as limited below) that n ew Flake/ Chiplet ice machines manufactured by the COMPANY shall
be free of defects in material or workmanship under normal and proper use and maintenance as specified by the
COMPANY and upon proper installation and start-up in accordance with the instruction manual supplied with the ice
machine. The COMPANY'S warranty hereunder with respect to the compressor shall apply for an additional thirty-six
months, excluding all labor charges.

The obligation of the COMPANY under this warranty is limited to the repair or replacement of parts, components, or
assemblies that in the opinion of the COMPANY are defective. This warranty is further limited to the cost of parts,
components or assemblies and standard straight time labor charges at the servicing location.

Time and hourly rate schedules, as published from time to time by the COMPANY, apply to all service procedures.
Additional expenses including without limitation, travel time, overtime premium, material cost, accessing or removal of
the ice machine, or shipping are the responsibility of the owner, along with all maintenance, adjustments, cleaning,
and ice purchases. Labor covered under this warran ty must be performed by a COMPANY Contracted Service
Representative or a refrigeration service agency as qualified and authorized by the COMP ANY'S local Distributor . The
COMP ANY'S liability under this warranty shall in no event be greater than the actual purchase price paid by customer
for the ice machine.

The foregoing warranty shall not apply to (1) any part or assembly that has been altered, modified, or changed; (2)
any part or assembly that has been subjected to misuse, abuse, neglect, or accidents; (3) any ice machine that has
been installed and/or maintained inconsistent with the technical instructions provided by the COMP ANY; or (4) any ice
machine initially installed more than five years from the serial number production da te. This warranty shall not apply if
the Ice Machine's refrigeration system is modified with a condenser, heat reclaim device, or parts and assemblies
other than those manufactured by the COMPANY, unless the COMPANY approves these modifications for specific
locations in writing.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES OR GUARANTEES OF ANY KIND, EXPRESSED
OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. In no event shall the COMPANY be liable for any special, indirect, incidental or

consequential damages. Upon the expiration of the warranty period, the COMPANY'S liability under this warranty
shall terminate. The foregoing warranty shall constitute the sole liability of the COMP ANY and the exclusive remedy of
the customer or user. To secure prompt and continuing warranty service, the warranty registration card must be
completed and sent to the COMPANY within five (5) days from the installation date.

Complete the following and retain for your record:
Distributor/Dealer
Model Number Serial Number
Installation Date

MANITOWOC ICE

2110 So. 26th St., P.O. Box 1720, Manitowoc, WI 54221-1720

Telephone: [phone] Fax: [phone]
Web Site - www.manitowocice.com

Part Number 000005544 12/09 1-3

General Information Section 1

Residential Ice Machine Limited Warranty

WHAT DOES THIS LIMITED WARRANTY COVER?

Subject to the exclusions and limitations below,
ManitowocFoodservice. (“Manitowoc”) warrants to the
original consumer that any new ice machine
manufactured by Manitowoc (the “Product”) shall be
free of defects in material or workmanship for the
warranty period outlined below under normal use and
maintenance, and upon proper installation and start-up
in accordance with the instruction manual supplied with
the Product.

HOW LONG DOES THIS LIMITED WARRANTY
LAST?

Product Covered

Warranty Period

Ice Machine Twelve (12) months

from the sale date

WHO IS COVERED BY THIS LIMITED WARRANTY?

This limited warranty only applies to the original
consumer of the Product and is not transferable.

WHAT ARE MANITOWOC ICE’S OBLIGATIONS
UNDER THIS LIMITED WARRANTY?

If a defect arises and Manitowoc receives a valid
warranty claim prior to the expiration of the warranty
period, Manitowoc shall, at its option: (1) repair the
Product at Manitowoc’s cost, including standard straight
time labor charges, (2) replace the Product with one that
is new or at least as functionally equivalent as the
original, or (3) refund the purchase price for the Pr oduct.
Replacement parts are warranted for 90 days or the
balance of the original warranty period, whiche ve r is
longer. The foregoing constitutes Manitowoc’s sole
obligation and the consumer’s exclusive remedy for any
breach of this limited warranty. Manitowoc’s liability
under this limited warranty is limited to the purchase
price of Product. Additional expenses including, without
limitation, service travel time, overtime or premium labor
charges, accessing or removing the Product, or
shipping are the responsibility of the consumer.

HOW TO OBTAIN WARRANTY SERVICE

To obtain warranty service or information regarding your
Product, please contact us at:
MANITOWOC FOODSERVICE.
2110 So. 26th St.
P.O. Box 1720,
Manitowoc, WI 54221-1720
Telephone: [phone] Fax: [phone]
www.manitowocice.com

WHAT IS NOT COVERED?

This limited warranty does not cover, and you are solely
responsible for the costs of: (1) periodic or routine
maintenance, (2) repair or replacement of the Product
or parts due to normal wear and tear, (3) defects or
damage to the Product or parts resulting from misuse,
abuse, neglect, or accidents, (4) defects or damage to
the Product or parts resulting from improper or
unauthorized alterations, modifications, or changes; and
(5) defects or damage to any Product that has not been
installed and/or maintained in accordance with the
instruction manual or technical instructions provided by
Manitowoc. To the extent that warranty exclusions are
not permitted under some state laws, these exclusions
may not apply to you.

E

XCEPT AS STATED IN THE FOLLOWING SENTENCE, THIS

L

IMITED WARRANTY IS THE SOLE AND EXCLUSIVE

W

ARRANTY OF MANITOWOC WITH REGARD TO THE

P

RODUCT. ALL IMPLIED WARRANTIES ARE STRICTLY

L

IMITED TO THE DURATION OF THE LIMITED WARRANTY

A

PPLICABLE TO THE PRODUCTS AS STATED ABOVE,

I

NCLUDING BUT NOT LIMITED TO, ANY WARRANTY OF

M

ERCHANTABILITY OR OF FITNESS FOR A PARTICULAR

P

URPOSE.

Some states do not allow limitations on how long an
implied warranty lasts, so the above limitation may not
apply to you.

I

N NO EVENT SHALL MANITOWOC OR ANY OF ITS

A

FFILIATES BE LIABLE TO THE CONSUMER OR ANY OTHER

P

ERSON FOR ANY INCIDENTAL, CONSEQUENTIAL OR

S

PECIAL DAMAGES OF ANY KIND (INCLUDING, WITHOUT

L

IMITATION, LOSS PROFITS, REVENUE OR BUSINESS)

A

RISING FROM OR IN ANY MANNER CONNECTED WITH THE

P

RODUCT, ANY BREACH OF THIS LIMITED WARRANTY, OR

A

NY OTHER CAUSE WHATSOEVER, WHETHER BASED ON

C

ONTRACT, TORT OR ANY OTHER THEORY OF LIABILITY.

Some states do not allow the exclusion or limitation of
incidental or consequential damages, so the above
limitation or exclusion may not apply to you.

HOW STATE LAW APPLIES

This limited warranty gives you specific legal rights, and
you may also have rights that vary from state to state or
from one jurisdiction to another.

REGISTRATION CARD

To secure prompt and continuing warranty service, this
warranty registration card must be completed and sent
to Manitowoc within thirty (30) days from the sale date.
Complete the registration card and send it to
Manitowoc.

1-4

Part Number 000005544 12/09

Section 2 Installation Instructions

Important

4.0" (10.2 cm)

8.0" (20.3 cm)

12.0" (30.5 cm)

16.0" (40.6 cm)

1.0" (2.5 cm)

1.25"
(3.2 cm)

24.0" (61.0 cm)

12.5" (31.8 cm)

SN12

35.0" (88.9 cm)

SN20

42.0" (106.7 cm)

Electrical

Drain

Water

Inlet

!

Caution

Section 2

Installation Instructions

Ice Machine Dimensions

These instructions are provided to assist the qualified
installer. Check your local Yellow Pages for the name of
the nearest Manitowoc distributor, or call Manitowoc
Foodservice for information regarding start-up service s.

Failure to follow these installation guidelines may
affect warranty coverage.

SN12 & SN20 AIR COOLED ICE MACHINES

• The location must not be near heat-generating
equipment or in direct sunlight.

• The location must be capable of supporting the
weight of the ice machine and a full bin of ice and
allow the ice machine to be level front to back and
side to side.

• The location must allow enough clearance for water
and electrical connections in the rear of the ice
machine. The drain can be routed out the rear or
bottom of dispenser.

• The location must not obstruct airflow through or
around the ice machine. Airflow is in the left side and
out the top. Refer to chart for clearance
requirements.

Ice Machine Clearance Requirements

SN12 SN20

Top 24” 24”

Sides 8” 8”

Back *5” *5”

*5” is recommended for servicing the ice machine. Clearance
can be 0” when water and drain connections exit the bottom of
the ice machine.

Location of Ice Machine

The location selected for the ice machine must meet the
following criteria. If any of these criteria are not met,
select another location.

• The location must be free of airborne and other

contaminants.

• The air temperature must be at least 45°F (7°C), but
must not exceed 110°F (43.4°C).

• The water temperature must be at least 45°F (7°C),
but must not exceed 90°F (32.2°C).

Part Number 000005544 12/09 2-1

The ice machine head section must be protected if i t
will be subjected to temperatures below 32°F (0°C).
Failure caused by exposure to freezing
temperatures is not covered by the warranty. See
“Removal from Service/Winterization”.

Installation Instructions Section 2

!

Warning

!

Warning

Important

Electrical Service

All wiring must conform to local, state and national
codes.

VOLTAGE

The maximum allowable voltage variation is ±1 0% of the
rated voltage on the ice machine model/serial number
plate at start-up (when the electrical load is highest).

FUSE/CIRCUIT BREAKER

A separate fuse/circuit breaker must be provided for
each ice machine. Circuit breakers must be H.A.C.R.
rated (does not apply in Canada).

115/60/1 ice machines are factory pre-wired with a
power cord and 5-15P plug.

230/50/1 ice machines are factory pre-wired with a
power cord, no plug is supplied.

The ice machine must be grounded in accordance
with national and local electrical codes.

TOTAL CIRCUIT AMPACITY

The total circuit ampacity is used to help select the wire
size of the electrical supply.

The wire size (or gauge) is also dependent upon
location, materials used, length of run, etc., so it must be
determined by a qualified electrician.

Electrical Requirements

Air-Cooled

Maximum

Breaker

Total

Circuit

Amps

Ice Machine

SN12

SN20

Voltage

Phase

Cycle

115/1/60 15 10.3
230/1/50 15 4.6
115/1/60 15 10.3
230/1/50 15 6.0

Fuse/Circuit

Water Supply and Drains

POTABLE WATER SUPPLY

Local water conditions may require treatment of the
water to inhibit scale formation, filter sediment, and
remove chlorine odor and taste.

If you are installing a Manitowoc water filter system,
refer to the Installation Instructions supplied with the
filter system for ice making water inlet connections.

POTABLE WATER INLET LINES

Follow these guidelines to install water inlet lines:

• Do not connect the ice machine to a hot water
supply. Be sure all hot water restrictors installed for
other equipment are working. (Check valves on sink
faucets, dishwashers, etc.)

• If water pressure exceeds the maximum (80 psig

551.5 kPA) recommended pressure, obtain a water
pressure regulator from your Manitowoc distributor.

• Install a water shut-off valve and union for the ice
making water lines.

• Insulate water inlet lines to prevent condensation.

DRAIN CONNECTIONS

Follow these guidelines when installing drain lines:

• Drain lines must have a 1.5 inch drop per 5 feet of
run (2.5 cm per meter), and must not create traps.

• The floor drain must be large enough to
accommodate drainage from all drains.

• Insulate drain lines to prevent condensation.

• Drains must have a union or other suitable means to
allow in place disconnection from the ice machine
when servicing is required.

2-2

Part Number 000005544 12/09

Section 2 Installation Instructions

!

Caution

DRAIN

ICE MAKING

WATER INLET

TUBING 3/8”

MIN. I.D. (.95 SM)

DRAIN CONNECTION IS

INTERCHANGEABLE

DRAIN IS PREINSTALLED TO RUN OUT

THE BACK

MOVE DRAIN PLUG TO RUN DRAIN

OUT THE BOTTOM IF DESIRED

WATER SUPPLY AND DRAIN LINE SIZING/CONNECTIONS

Plumbing must conform to state and local codes.

Location Water Temperature Water Pressure Ice Machine Fitting

Ice Making
Water Inlet

Ice Machine

Drain

45°F (6°C) Min.

90°F (32.2°C) Max.

--- ---

20 psi (137.9 kPA) Min.

80 psi (551.5 kPA) Max.

3/8" Female
Pipe Thread

3/4" Female
Pipe Thread

Tubing Size Up to Ice

Machine Fitting

3/8" (10 mm) minimum

inside diameter

3/4" (19 mm) minimum

inside diameter

Part Number 000005544 12/09 2-3

Typical Water Supply Drain Installation

Installation Instructions Section 2

!

Warning

Before Starting the Ice Machine
Installation Checklist

X Checklist Item

Is the Ice Machine level?
Has all of the internal packing been removed?
Have all of the electrical and water connections

been made?
Has the supply voltage been tested and checked

against the rating on the nameplate?
Is there proper clearance around the ice machine

for air circulation?
Has the ice machine been installed where am bien t

temperatures will remain in the range of 45° ­110°F (7° - 43.3°C)?

Has the ice machine been installed where the
incoming water temperature will remain in the
range of 45° - 90°F (7° - 32.2°C)?

Are all electrical leads free from contact with
refrigeration lines and moving equipment?

Has the owner/operator been instructed regarding
maintenance and the use of Manitowoc Cleaner
and Sanitizer?

Has the warranty registration card been sent to the
factory?

Has the ice machine and dispenser been
sanitized?

Has this manual been given to the owner/operator?
Is the water reservoir approximately 2/3 full of

water?
Has the toggle switch been placed in the ice

position? (Switch is located behind front cover)

All Manitowoc ice machines are factory-operated and
adjusted before shipment. Normally, new installations do
not require any adjustment. To ensure proper operation,
follow the Operational Checks in Section 3 of this
manual.

Adjustments and maintenance procedures outlined in
this manual are not covered by the warranty.

Potential Personal Injury Situation

Do not operate equipment that has been misused.
abused, neglected, damaged, or altered/modified
from that of original manufactured specifications.

2-4

Part Number 000005544 12/09

Section 3 Ice Machine Operation

R

R

Section 3

Ice Machine Operation

Component Identification

ICE MACHINE HEAD SECTION

ICE

WIPER

ICE CHUTE

COVER

BIN

COVER

BIN

SELECTOR

SWITCH

BLUE
LIGHT

ICE
CHUTE
SPOUT

HALL EFFECT

SWITCH

WATER

RESERVOI

GEAR

MOTOR

CONTROL

BOARD

ICE

STRAINER

ICE

CHUTE

DAMPER

ICE

CHUTE

BIN

COVER

THUMBSREWS

WATER

RESERVOI

DISPENSE ARM

or

TOUCHLESS

SENSOR LOCATION

SCRAP

ICE TRAY

TOGGLE

SWITCH

ICE
WATER
ICE /
WATER

SELECTOR

OPTIONAL

LEGS

SWITCH

SCRAP ICE

GRILL

Part Number 000005544 12/09 3-1

Ice Machine Operation Section 3

WATER

SENSING

FLOAT

Operational Checks

GENERAL

Manitowoc ice machines are factory-operated and
adjusted before shipment. Normally , a newly inst alled ice
machine does not require any adjustment.

To ensure proper operation, always follow the
Operational Checks:

• when starting the ice machine for the first time

• after a prolonged out of service period

• after cleaning and sanitizing
NOTE: Routine adjustments and maintenanc e

procedures outlined in this manual are not covered by
the warranty.

Blue Light

The blue light on the dispensing spout is energized
when the toggle switch is in the ICE position and the ice
machine is operational. If the light is not energized the
ice machine will not make ice. Refer to section 5 Before
Calling For Service if the ice machine has power and the
light will not energize.

Toggle Switch

The toggle switch must be placed in the ON position to
make ice.

Wat er Re se rvoi r

Ice Production

Allow the ice machine to produce ice for 15 minutes
before testing the dispense mechanism. This will insure
a sufficient quantity of ice in the bin for dispensing.

OPERATION

1. Set Selector Switch

Depress the button adjacent to the text.

• Select ICE for ice dispense only

• Select ICE/WATER for water and ice

• Select WATER for water only

2. Dispense

Lever Activated
Use glass or container to press dispenser arm

backward. Release the arm and the ice machine will
stop dispensing.

Touchless Center Activated
Place a glass or container underneath the dispensing

spout within a 1” of the sensor. The ice machine will
automatically dispense. Remove the glass or container
to stop dispensing.

The water reservoir must be 2/3 full of water and the
water sensing float must be up (switch closed) before
the ice machine will start.

3-2

Part Number 000005544 12/09

Section 3 Ice Machine Operation

Sequence of Operation

15 MINUTE TIME DELAY

The 15 minute delay must be expired before the
gearmotor or compressor will energize.

The delay period starts to time out upon applica tion of
power or movement of the toggle switch from OFF to
ICE.

The delay period starts when:

• Tthe ice machine enters Automatic Shutoff

• Power is disconnected and reconnected

• The toggle switch is moved from OFF to ICE
This time delay period can not be overridden and will

reset to 15 minutes if any of the above conditions occur.

PRIOR TO STARTUP

When the toggle switch is placed in the ICE position the
following must occur in the listed order before ice
making will start.

• The ice chute damper must be in the closed or down
position.

• The 15 minute delay period must be expired. The
delay period starts upon application of power or
toggle switch movement from OFF to ICE.

• The water sensing switch must be closed (water
reservoir full of water and water sensing float in the
up position).

INITIAL STARTUP

Applying power and/or moving the toggle switch from
OFF to ICE will start a 15 minute delay period. This
delay period can not be overridden. With the water
sensing switch closed (reservoir full of water) the gear
motor will energize at the end of the 15 minute time
delay. The compressor and condenser fan motor
energize 5 seconds after the gearmotor.

FREEZE CYCLE

The float valve automatically maintains the water level in
the reservoir. The ice damper will open and close to
verify ice production. The ice machine will continue to
make ice until the ice damper is held open (up) as ice
fills the bin.

AUTOMATIC SHUTOFF

When the ice damper is held open by ice, the gearmotor,
compressor and condenser fan de-energize. The fifteen
minute delay period starts to time out. The ice machine
will remain off until the 15 minute delay period expires
and the ice damper closes.

RESTART AFTER AUTOMATIC SHUT-OFF

1. Less than 4 hours have passed since automatic
shut-off.

With the water sensing switch closed (reservoir full of
water) the gear motor will energize at the end of the 15
minute time delay. The compressor and condenser fan
motor energize 5 seconds after the gearmotor.

2. More than 4 hours have passed since automatic
shut-off.

The dump valve energizes to drain the evaporator. After
30 seconds the dump valve de-energizes. When the
reservoir fills with water, the water sensing switch closes
and the gearmotor energizes. The compressor and
condenser fan motor energize 5 seconds after the
gearmotor.

SafeGuards

The ice machine control board has safety features to
protect the ice machine from severe failures. The ice
machine will stop when conditions arise that would
cause major component failure. Refer to section 5 for
details

Part Number 000005544 12/09 3-3

Ice Machine Operation Section 3

!

Caution

Removal from Service/Winterization

GENERAL

Special precautions must be taken if the ice machine
head section is to be removed from service for an
extended period of time or exposed to ambient
temperatures of 32°F (0°C) or below.

If water is allowed to remain in the ice machine in
freezing temperatures, severe damage to some
components could result. Damage of this nature is
not covered by the warranty.

Follow the procedure below.

1. Disconnect the electrical power at the circuit breaker
or the electric service switch.

2. Turn off the water supply.

3. Disconnect and drain the incoming ice-making water
line at the rear of the ice machine.

4. Disconnect drain tubing (from the inlet to dump
valve) and drain water into container and discard.

5. Make sure water is not trapped in any of the water
lines, drain lines, distribution tubes, etc.

3-4

Part Number 000005544 12/09

Section 4 Maintenance

!

Caution

!

Caution

!

Warning

Section 4

Maintenance

Cleaning and Sanitizing

GENERAL

You are responsible for maintaining the ice machine in
accordance with the instructions in this manual.
Maintenance procedures are not covered by the
warranty.

Clean and sanitize the ice machine every six months for
efficient operation. If the ice machine requires more
frequent cleaning and sanitizing, consult a qualified
service company to test the water quality and
recommend appropriate water treatment. If required, an
extremely dirty ice machine may be taken apart for
cleaning and sanitizing.

Manitowoc Ice Machine Cleaner and Sanitizer are the
only products approved for use in Manitowoc ice
machines.

Use only Manitowoc approved Ice Machine Cleaner
(part number 000000084) and Sanitizer (part
number 94-0565-3). It is a violation of Federal law to
use these solutions in a manner inconsistent with
their labeling. Read and understand all labels
printed on bottles before use.

EXTERIOR CLEANING
Weekly

Remove grill from scrap ice tray and wipe splash panel,
scrap ice tray and grill with sanitizer & water solution
(refer to page 4-7). Pour excess solution in scrap ice tray
to clear drain.

TOUCHLESS SENSOR ONLY
Wipe sensor window with a soft cloth and mild detergent.

Rinse with clear water and dry with a clean soft cloth.
Dust and dirt can be removed from exterior surfaces with

mild household dish-washing detergent and warm water.
Wipe dry with a clean, soft cloth.

Do not mix Cleaner and Sanitizer solutions together.
It is a violation of Federal law to use these solutions
in a manner inconsistent with their labeling.

Wear rubber gloves and safety goggles ( an d/or face
shield) when handling ice machine Cleaner or
Sanitizer.

Part Number 000005544 12/09 4-1

Maintenance Section 4

Manitowoc’s Cleaning Technology

Manitowoc Flake/Nugget Ice Machines include
technology that allows the initiation and completion of a
cleaning cycle at the flip of a switch. This cycle will
permit cleaning of all surfaces that come in contact with
the water distribution system. Periodic maintenance
must be performed that includes sanitizing the bin and
adjacent surface areas, which are not contacted by the
water distribution system.

Depending on local water conditions Manitowoc
recommends initiating preventative maintenance
cleaning procedures between the 6 month cleanings.
This preventive maintenance removes mi n era l build -u p
from the evaporator, which results in peak efficiency and
lower operating costs.

This technology allows initiation and completion of a
clean cycle, after which the ice machine automatically
starts ice making again.

This Manitowoc Ice Machine has three separate
cleaning procedures.

Preventative Maintenance Cleaning Procedure

Perform this procedure as required for your water
conditions. Recommended monthly.

• Allows cleaning the ice machine without removing all
of the ice from the bin

• Removes mineral deposits from areas or surfaces
that are in direct contact with water during the freeze
cycle (reservoir, evaporator, auger, drain lines).

Cleaning/Sanitizing Procedure

This procedure must be performed a minimum of once
every six months.

• All ice must be removed from the bin

• The ice machine and bin must be disassembled
cleaned and sanitized

• The ice machine produces ice with the cleaner and
sanitizer solutions

• All ice produced during the cleaning and sanitizing
procedures must be discarded

Heavily Scaled Cleaning Procedure

Perform this procedure if you have some or all of these
symptoms.

• Grinding, popping or squealing noises from the
evaporator

• Grinding noise from gearbox

• Ice machine stops on Safety Shutdown

• Your water has a high concentration of minerals

• The ice machine has not been on a regular
maintenance schedule.

Run a cleaning procedure as described above after this
procedure is complete.

NOTE: A Sanitizing Procedure must be performed after
all cleaning procedures have been completed.

4-2

Part Number 000005544 12/09

Section 4 Maintenance

!

Caution

Add Cleaner To Evaporator Here

PREVENTATIVE MAINTENANCE CLEANING PROCEDURE

Ice machine cleaner is used to remove lime scale or other mineral deposits. It is not used to remove algae or slime.
Refer to “Sanitizing Procedure” for removal of algae and slime. To initiate a cleaning cycle using Manitowoc’s
Cleaning Technology use the following procedure.

Step 1 T o st art a cleaning cycle, move the toggle switch
to the CLEAN position. Water will flow through the water
dump valve and down the drain.

Step 2 Remove the top panel and translucent plastic
ice chute cover. Wait about one minute then add the
proper amount of Manitowoc Ice Machine Cleaner.
Rinse the cleaner from the top of the evaporator with 2
ounces (60 ml) of clear water and re-install cover.

Model Amount of Cleaner

SN12 SN20 2 ounce (60 ml)

Use only Manitowoc approved Ice Machine Cleaner.
It is a violation of Federal law to use these solutions
in a manner inconsistent with their labeling. Read
and understand all labels printed on bottles before
use.

.

Step 3 The ice machine will run a wash cycle, a series
of rinse cycles and then stop. This entire cycle lasts
approximately 30 minutes.

NOTE: Periodic cleaning must be performed on adjacent
surface areas not contacted by the water distrib utio n
system.

NOTE: The ice machine may be set to start and finish a
cleaning procedure, and then automatically start ice
making again.

A. After cleaner is added move the switch from

CLEAN to ICE position.

B. When the cleaning cycle is complete ice making

will start automatically.

Changing toggle switch position during clean cycle:

1. Less than 60 seconds into Clean cycle - The Clean
cycle will end when the toggle switch is moved to the
OFF position.

2. More than 60 seconds into Clean cycle - The ice
machine will complete the clean cycle. T oggle switch
position will determine the next cycle after the Clean
cycle is completed.

• CLEAN POSITION - The ice machine will wait for a
change in toggle switch position.

• OFF POSITION - The ice machine will wait for a
change in toggle switch position.

• ICE POSITION - The ice machine will start making
ice automatically.

Manitowoc recommends disassembling, cleaning and
sanitizing the ice machine and dispenser every six
months.

Part Number 000005544 12/09 4-3

Maintenance Section 4

Important

ICE

WATER

ICE /
WATER

Add Cleaner To Evaporator Here

PROCEDURE TO CLEAN HEAVILY SCALED FLAKE/NUGGET ICE MACHINES

Ice machines that are heavily scaled or have not been cleaned on a regular basis will need to run this procedure.
Failure to do so may result in binding of the auger as the lime scale releases from the auger and e vaporator barrel.

Step 1 Remove panels and set the ICE/OFF/CLEAN
toggle switch to the OFF position.

Step 2 Remove all ice from the bin.
Step 3 Turn off the water supply to the ice machine.
Step 4 Place ICE/OFF/CLEAN toggle switch in the

CLEAN position. The dump valve will open and drain the
water from the evaporator and reservoir.

Step 5 Wait approximately 30 seconds (or until the
evaporator is drained) and place the toggle switch in the
OFF position.

Step 6 Refer to chart and add the correct amount of
cleaner for your model ice machine.

Model Amount of Cleaner

SN12 SN20 12 ounce (355 ml)

Step 7 Turn on the water supply to the ice machine.

Leave the cleaner/water solution in the evaporator
for a minimum of 4 hours.

Step 8 Move the toggle switch to the ICE position. The
compressor will energize and produce ice with the
cleaning solution. Continue the freeze cycle for 15
minutes.

Step 9 Move the toggle switch to the OFF position,
then follow the standard cleaning and sanitizing
procedures on pages 4-5 & 4-6.

4-4

Part Number 000005544 12/09

Section 4 Maintenance

ICE

WATER

ICE /
WATER

Add Solution To Evaporator Here

Add Until

Solution Exits

The Water

Reservoir

Overflow Tube

CLEANING PROCEDURE

Ice machines that are heavily scaled or have not been cleaned on a regular basis will need to run the Heavily Scaled
Cleaning Procedure before this one. Failure to do so may result in binding of the auger as the lime scale releases
from the auger and evaporator barrel.

Ice machine cleaner is used to remove lime scale or other mineral deposits. It is not used to remove algae or slime.
Refer to the “Sanitizing Procedure” for removal of algae and slime.

Step 1 Remove panels and set the ICE/OFF/CLEAN
toggle switch to the OFF position

Step 2 Turn off the water supply to the ice machine.
Step 3 Remove all ice from the bin.
Step 4 Place ICE/OFF/CLEAN toggle switch in the

CLEAN position. The dump valve will open and drain the
water from the evaporator and reservoir.

Step 5 Wait approximately 30 seconds (or until the
evaporator is drained) and place the toggle switch in the
OFF position.

Step 6 Refer to chart and premix the correct solution of
cleaner and cool water for your ice machine

Amount of

Model

SN12 SN20 2 ounces (60 ml) 32 ounces (1 liter)

Cleaner

Part Number

000000084

Amount of Water

Step 7 Remove the top cover from the ice chute and

pour the cleaner/water solution into the evaporator. Add
the entire amount of premixed solution (excess solution
will exit through the overflow tube in the water
reservoir).

Step 8 Replace the ice chute cover and allow the ice
machine to stand for 30 minutes.

Step 9 Turn on the water supply to the ice machine.
Step 10 Move the toggle switch to the ICE position.

After the 15 minute delay period expires the compressor
will energize and produce ice with the cleaning solution.

Step 11 The ice machine will freeze and discharge the
cleaning solution into the bin. Allow the cycle to run for
15 minutes.

Step 12 Place the toggle switch in the OFF position
and refer to sanitizing procedure.

NOTE: Discard all ice produced during the cleaning
process. Cleaning and sanitizing must be performed on
adjacent surface areas not contacted by the water
distribution system. Refer to Removal of Parts for
Cleaning/Sanitizing (Page 4-7)- Disassemble, clean and
sanitize the ice machine a minimum of once every six
months.

Part Number 000005544 12/09 4-5

Maintenance Section 4

ICE

WATER

ICE /
WATER

Add Solution To Evaporator Here

Add Until

Solution Exits

The Water

Reservoir

Overflow Tube

SANITIZING PROCEDURE

Ice machine sanitizer is used to remove algae or slime. It is not used to remove lime scale or other mineral deposits.
Refer to the “Cleaning Procedure” for removal of lime scale or other mineral deposits.

NOTE: Sanitizing must be performed on adjacent surface areas not contacted by the water distribution system.
Always perform Disassembly for Cleaning and Sanitizing Procedure and a Cleaning Procedure before sanitizing the
ice machine.

Step 1 Turn off the water supply to the ice machine.
Step 2 Place ICE/OFF/CLEAN toggle switch in the

CLEAN position. The dump valve will open and drain the
water from the evaporator and reservoir.

Step 3 Wait approximately 30 seconds (or until the
evaporator is drained) and place the toggle switch in the
OFF position.

Step 4 Refer to the chart and add the correct amount of
sanitizer and cool water for your model ice machine.

Model

SN12 SN20 2 ounces (60 ml) 3 gallons (11 liters)

Amount of

Sanitizer

Amount of Water

Step 5 Remove the top cover from the ice chute and

pour the sanitizer/water solution into the evaporator . Add
the entire amount of premixed solution (excess solution
will exit through the overflow tube in the water reservoir)

Step 6 Replace the ice chute cover and allow the ice
machine to stand for 30 minutes.

Step 7 Turn on the water supply to the ice machine.
Step 8 Move the toggle switch to the ICE position. After

the 15 minute delay period expires the compressor will
energize and produce ice with the sanitizing solution.

Step 9 The ice machine will freeze and discharge the
sanitizing solution into the bin. Allow the cycle to run for
15 minutes.

NOTE: Discard all ice produced during the sanitizing
process.

Step 10 Place the toggle switch in the CLEAN position.
The ice machine will run a wash cycle, a series of rinse
cycles and then stop. This entire cycle lasts
approximately 30 minutes.

Step 11 Refer to Disassembly For Cleaning/Sanitizing,
(Pag 4-7) remove clean and sanitize all parts listed.

4-6

Part Number 000005544 12/09

Section 4 Maintenance

!

Caution

!

Warning

!

Warning

Remove

Screws

Loosen Thumbscrews

Component Disassembly For Cleaning/Sanitizing

The ice machine must be disassembled cleaned and
sanitized every six months.

Do not mix Cleaner and Sanitizer solutions together.
It is a violation of Federal law to use these solutions
in a manner inconsistent with their labeling.

1. Turn off water supply to ice machine.

Wear rubber gloves and safety goggles ( an d/or face
shield) when handling Ice Machine Cleaner or
Sanitizer.

2. Place toggle switch in the clean position for 30
seconds to drain water from reservoir, then move
toggle switch to Off position.

3. Run dispenser to transfer all ice from the bin to a
container.

Disconnect electric power to the ice machine at the
electric switch box before proceeding.

4. Disconnect electrical power to the ic e ma ch in e.

5. Remove top cover.

6. Remove front cover.
A. Lift up on front cover.
B. Pull forward to disengage keyhole slots.

7. Remove ice chute cover
A. Turn the two thumbscrews 1/4 turn
B. Lift to remove cover.

A. Remove two thumbscrews.
B. Lift up on top cover to remove.

Part Number 000005544 12/09 4-7

Maintenance Section 4

Ice Chute

Hose Clamp

Ice
Chute
Drain

Remove Screw

8. Lift out ice damper.

9. Lift out ice strainer ramp.

11 . Loosen ice chute hose clamp.

12. Disconnect ice chute drain.

13. Lift up on ice chute to remove. The ice chute must
be removed before the bin cover can be removed .

10. Turn ice wiper counterclockwise to remove.

4-8

14. The ice chute can be cleaned in place. If complete
removal is desired use a phillips screwdriver to
remove the Hall Effect Switch assembly from the ice
chute.

Part Number 000005544 12/09

Section 4 Maintenance

Remove Thumbscrews

SN012 - Remove Thumbscrew &

Agitator Bar

SN020 - Remove Upright Agitator

& Agitator Bar Then Ice Breaker

Thumbscrews, Bolts & Breaker Bar

Remove

Wingnuts

!

Caution

15. Remove three thumbscrews, then remove bin cover.

16. Remove agitator bar and ice breaker on SN020.

NOTE: Bar must be reassembled by inserting front
edge into the paddle wheel, then lowering the back ed ge
(rounded 90 angle) to prevent water leakage into the
compressor compartment.

18. Remove ice dispensing wheel by lifting straight out.

Water Reservoir Cover Removal

Push up on cover to snap off.

17. Remove ice deflector.
A. Remove the two thumbscrews.
B. Lift the ice deflector out.

19. Mix a solution of cleaner and warm water.
Depending upon the amount of mineral buildup, a
larger quantity of solution may be required. Use the
ratio in the table below to mix enough solution to
thoroughly clean all parts.

Solution Type Water Mixed With

Cleaner 1 gal. (4 l) 16 oz (500 ml) cleaner

20. Use the cleaner/water mixture to clean all
components. The cleaner solution will foam when it
contacts lime scale and mineral deposits; once the
foaming stops use a soft-bristle nylo n brush, sponge
or cloth (NOT a wire brush) to carefully clean the
parts. Soak parts for 5 minutes (15 - 20 minutes for
heavily scaled parts). Rinse all components with
clean water.

Do not pour cleaner or sanitizer solutions into the
bin. The solution will leak out of the front of the bin
and into the compressor compartment.

Part Number 000005544 12/09 4-9

Maintenance Section 4

Do Not Allow

Solutions To Drain

Through Center Hole

!

Warning

!

Caution

!

Caution

21. While components are soaking clean all foodzone
surfaces of the bin. Rinse all areas thoroughly with
clean water.

22. .Mix a solution of sanitizer and warm water.

Solution Type Water Mixed With

Sanitizer 6 gal. (23 l) 4 oz (120 ml) sanitizer

23. Use 1/2 of the sanitizer/water solution to sanitize all
removed components. Use a cloth or sponge to
liberally apply the solution to all surfaces of the
removed parts or soak the removed parts in the
sanitizer/water solution. Do not rinse parts after
sanitizing.

24. Use 1/2 of the sanitizer/wa ter solution t o sanitize the
dispenser bin, water trough and delivery spout. Use
a cloth or sponge to liberally apply the solution. Do
not rinse the sanitized areas.

25. Reinstall the removed parts, restore water and
power supply and test run the ice machine.

NOTE: Disconnecting and reconnectin g the po we r
supply activated a 15 minute time delay. This delay
period can not be over ridden. The delay period will start
when power is restored and the ice machine starts after
the 15 minute delay period expires.

CLEANING THE CONDENSER

Disconnect electric power to the ice machine and
the remote condenser at the electric service switch
before cleaning the condenser.

Air-Cooled Condenser

A dirty condenser restricts airflow, resulting in
excessively high operating temperatures. This reduces
ice production and shortens component life. Clean the
condenser at least every six months. Follow the steps
below.

The condenser fins are sharp. Use care when
cleaning them.

1. The washable filter is designed to catch dust, dirt,
lint and grease. This helps keep the condenser
clean. Clean the filter with a mild soap and water
solution.

2. Clean the outside of the condenser with a sof t brush
or a vacuum with a brush attachment. Clean from
top to bottom, not side to side. Be careful not to
bend the condenser fins.

3. Shine a flashlight through the condenser to check
for dirt between the fins. If dirt remains:

A. Blow compressed air through the condenser fins

from the inside. Be careful not to bend the fan
blades.

B. Use a commercial condenser coil cleaner.

Follow the directions and cautions supplied with
the cleaner.

4. Carefully wipe off the fan blades and motor with a
soft cloth. Do not bend the fan blades. If the fan
blades are excessively dirty, wash with warm, soapy
water and rinse thoroughly.

4-10

If you are cleaning the condenser fan blades with
water, cover the fan motor to prevent water
damage.

Part Number 000005544 12/09

Section 5 Before Calling For Service

Section 5

Before Calling For Service

Checklist

If a problem arises during operation of your ice machine, follow the checklist below before calling for service. Routine
adjustments and maintenance procedures are not covered by the warranty.

Problem Possible Cause To Correct

Ice machine does not operate
Blue light on dispenser spout is

off

Blue light on dispenser spout is
on

Gear Motor runs but
compressor will not start.

Ice machine stops and can be
restarted by moving the toggle
switch to OFF and back to ICE

Ice quality is poor Poor incoming water quality Contact a qualified service company to test the

Low ice capacity
or
Ice machine turns Off & On

repeatedly

No electrical power to the ice machine Reset the breaker/turn on main power switch/

plug cord into receptacle
ICE/OFF/CLEAN toggle switch set improperly Move toggle switch to the ICE position
Control Board fuse open Replace the fuse
15 minute delay has not expired Wait 15 minutes for ice machine to start
High Pressure Control is open Clean filter and condenser
Water reservoir is empty. (Water sensing

switch must be closed to start the gearmotor)
Dirty air filter and/or condenser causes the

high pressure cutout and compressor overload
to open

The SafeGuard feature is stopping the ice
machine

Water filtration is poor Replace filter
Incoming water temperature is above 90

(32.3°C)

Water pressure is low Water pressure must remain between 20 and

Water softener is working improperly (if
applicable)

Water float valve screen is dirty Remove and clean the filter screen
Incoming water supply is shut-off Open the water service valve
Water dump valve is leaking Clean the dump valve
Water Pressure is low. The water sensing

switch turns off the ice machine repeatedly
Incoming water temperature is above 90

(32.2

°C)

Frequent power interruptions or power surges/
dips

Water float valve stuck open or leaking Remove the float valve and clean it
Objects stacked around ice machine, blocking

airflow to condenser
High air temperature around ice machine Air temperature must not exceed 110

Inadequate clearance around the ice machine Provide adequate clearance
The condenser is dirty Clean the condenser

°F

°F

Open water service valve or clean float valve

screen

Clean air filter and condenser - Disconnect

power for minimum 4 hours then energize. If

problem persists contact a qualified service

company to determine cause.

Refer to “SafeGuard Feature” in this sectio n

quality of the incoming water and check filter

Correct water temperature. (Verify check/

mixing valves in other equipment are working

properly). Connect the ice machine to a cold

water supply

80 psig

Repair the water softener

Water pressure must remain between 20 and

80 psig

Correct water temperature. (verify check/

mixing valves in other equipment is working

properly)

Verify ice machine is on a separate circuit and

power is stable

Remove items blocking airflow

°F

°C)

(43.3

Part Number 000005544 12/09 5-1

Before Calling For Service Section 5

Safeguard Feature

In addition to standard safety controls, your Manitowoc ice machine features built-in SafeGuards. The ice machine will
stop when conditions arise that would cause major component failure.

GENERAL

The ice machine control board has safety features to
protect the ice machine from severe failures. The ice
machine will stop when conditions arise that would
cause major component failure.

A control board light will flash to indicate which
Safeguard has stopped the ice machine.

Safeguards can be viewed by placing the ICE/OFF/
CLEAN toggle switch in the OFF position.

After 48 hours a Safeguard is automatically erased.

DETERMINING WHICH SAFEGUARD STOPPED THE
ICE MACHINE

Move the ICE/OFF/CLEAN toggle switch to OFF.
If a safeguard has stopped the ice machine, the light

which corresponds to the failure will flash.

SAFEGUARD INDICATOR LIGHTS

During a SafeGuard Mode the corresponding light will
flash continuously.

Example; the “water ok” light on the control board
flashes when the toggle switch is placed in the Off
position. This indicates a loss of water in the reservoir or
a failure of the water sensing switch.

The SafeGuard will remain in memory for 48 hours after
the control is reset with the toggle switch. After 48 hours
the SafeGuard will automatically be erased. If power is
interrupted during the 48 hours, the timing will resume
when power is applied to the ice machine.

SafeGuards

1. No Water - The water sensor switch opens for more
than 20 seconds during the freeze cycle.

2. No Ice Production - The damper door ( HES1) fails to
open and close at least once during the first 8
minutes of compressor run time.

or

The damper door fails to open and close at least
once every 90 seconds during the freeze cycle.

RESET PROCEDURE

1. Move the ICE/OFF/CLEAN toggle switch to OFF
and then back to ICE.

A. If a safeguard feature has stopped the ice

machine, it will restart after a short delay.
Proceed to step 2.

B. If the ice machine does not restart, refer to “Ice

Machine Does Not Operate” in section 5.

2. Allow the ice machine to run to determine if the
problem still exists.

A. If the ice machine continues to run, the condition

has corrected itself. Allow the ice machine to
continue running.

B. If the ice machine stops again, the problem still

exists.

Placing the toggle switch in the OFF position:

The corresponding light will flash continuously.

Placing the toggle switch in the ICE position:

The light will de-energize and a start-up sequence will
initiate.

During the first 48 hours after the control board was
reset, the corresponding light will flash anytime the
toggle switch is placed in the OFF position.

5-2

Part Number 000005544 12/09

Section 5 Before Calling For Service

SafeGuard Modes

NO WATER

During the Freeze cycle if the water sensing switch
opens or remains open for more than 20 continuous
seconds,

1. The ice machine will de-energize the compressor
and gear motor immediately

2. Continuously flash the control board water OK light

3. Initiate a 15 minute Standby Mode

After the 15 minute standby the ice machine will check
the status of the water level sensor.

WATER LEVEL SENSOR CLOSED:
The ice machine will initiate a startup sequence.

No Water SafeGuard Checklist

Possible Problem List Corrective Action List

No water Restore water supply.
Water float valve screen blocked Clean screen.
Water float valve improperly adjusted Adjust valve (see Water level check).
Dump valve leaking Repair or replace dump valve.
Water sensing switch disconnected or removed Connect or correctly position sensor

WATER LEVEL SENSOR OPEN:
The ice machine will wait for the water level sensor to

close.
INDICATOR LIGHT
Before 48 hours have elapsed:
After a Standby Mode has been initiated the water level

light will flash anytime the toggle switch is placed in the
OFF position.

After 48 hours have elapsed:
The SafeGuard will be automatically erased from

memory and the water level will not flash.

Part Number 000005544 12/09 5-3

Before Calling For Service Section 5

NO ICE PRODUCTION

The damper door (HES1) fails to open and close at least
once during the first 8 minutes of compressor run time

or

The damper door fails to open and close at least once
every 90 seconds during the freeze cycle

1. The ice machine will de-energize the compressor
and gear motor immediately

2. Continuously flash the HES1 control board light

3. Initiate a 60 minute Standby Mode

After the 60 minute standby the ice machine will restart.
ICE PRODUCTION NORMAL:
The ice machine will continue to run.

No Ice Production SafeGuard Checklist

NO ICE PRODUCTION:
The ice machine will start another 60 minute Standby

Mode.
When 5 consecutive 60 minute Standby Modes occur

the ice machine shuts off and flashes the HES1 control
board light. The ice machine must be reset by cycling
the toggle switch from ICE to OFF to ICE.

INDICATOR LIGHT
Before 48 hours have elapsed:
After a Standby Mode has been initiated the HES1 light

will flash anytime the toggle switch is placed in the OFF
position.

After 48 hours have elapsed:
The SafeGuard will be automatically erased from

memory and the HES1 light will not flash.

Possible Problem List Corrective Action List

Ice machine evaporator has mineral buildup Clean the ice machine
Damper door removed or incorrectly installed Refer to component identification for correct placement
Disconnected or defective damper door sensor Refer to component identification and verify sensor at damper

door is attached
Ice frozen to auger/evaporator Allow evaporator to thaw 1 hour, then retry.
Low voltage Voltage must be within ± 10% of nameplate voltage.
Gear motor doesn’t run, compressor will not run, compressor

runs without producing ice

Contact a qualified service company

5-4

Part Number 000005544 12/09

EC DECLARATION OF CONFORMITY

EC DECLARATION OF CONFORMITY

We hereby declare that our products, ice machines and Multiplex refrigeration equipment
comply with all the essential requirements of the listed EC - directives.

Manufacturer:

Manitowoc Ice, Inc.
2110 S. 26th Street, P.O. Box 1720
Manitowoc, Wisconsin 54221-1720 USA

Representative of Manitowoc Ice. Inc.:

Engineering Manager, (Printed name)

Signature

Model and Serial No.

Applied Standards:

EN60335-1 Safety of household and similar electrical appliances EN55014 Electrical Major Operated Appliances (Emissions)
EN60335-2-24 Particular requirements refrigerators, food freezers and ice makers EN55104 Electro Magnetic Compatability (immunity)
EN378 -1 to -4 Refrigeration Plants

European Distributor:

Representative of European Distributor:

Applied EC Directives:

Low Voltage 73/23/EEC
EMC 89/336/EEC
Pressure Equipment 97/23/EC

8201043
08/25/03

We hereby declare that our products, ice machines and Multiplex refrigeration equipment
comply with all the essential requirements of the listed EC - directives.

Manufacturer:

Manitowoc Ice, Inc.
2110 S. 26th Street, P.O. Box 1720
Manitowoc, Wisconsin 54221-1720 USA

Representative of Manitowoc Ice. Inc.:

Engineering Manager, (Printed name)

Signature

European Distributor:

Representative of European Distributor:

Model and Serial No.

Applied Standards:

EN60335-1 Safety of household and similar electrical appliances EN55014 Electrical Major Operated Appliances (Emissions)
EN60335-2-24 Particular requirements refrigerators, food freezers and ice makers EN55104 Electro Magnetic Compatability (immunity)
EN378 -1 to -4 Refrigeration Plants

Applied EC Directives:

Low Voltage 73/23/EEC
EMC 89/336/EEC
Pressure Equipment 97/23/EC

8201043
08/25/03

© 2009 Manitowoc
Continuing product improvements

may necessitate change of
specifications without notice.

Part Number 000005544 12/09

2110 South 26th Street, P.O. Box 1720

Manitowoc Foodservice

Manitowoc, WI 54221-1720, USA

Ph: 920-682-0161 Fax: [phone]

Visit us online at: www.manitowoc.com