Manitowoc Undercounter Entire Manual

Ice Machines Installation, Use, Care and Service Manual
Thank you for selecting a Manitowoc Ice Machine, the dependability leader in ice making equipment and related products. With proper installation, care and maintenance, your new Manitowoc Ice Machine will provide you with many years
of reliable and economical performance.

Safety Notices
When using or servicing a Q Model Ice Machine, 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 ice machine.
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, and then proceed carefully.

Text in a Caution box alerts you to a situation in which you could damage the ice machine. Be sure to read the Caution statement, and then proceed carefully.
Procedural Notices
When using or servicing a Q Model Ice Machine, be sure to read the procedural notices in this manual. These
notices supply helpful and important information.
Throughout this manual, you will see the following types of procedural notices:

Important boxes serve two functions.
They call the operator’s attention to important information.
They also provide the service technician with information that may help perform a procedure more efficiently.
Disregarding this information may slow down the work.
NOTE: Text set off as a Note provides you with simple, but useful, extra information.
Please read the following Safety Notices before proceeding.

Proper installation, care and maintenance are essential for maximum ice production and trouble-free operation of your Manitowoc Ice Machine.
Read and understand this manual. It contains valuable care and maintenance information. If you encounter problems not covered by this manual, feel free to contact Manitowoc Ice, Inc. We will be happy to provide assistance.

Routine adjustments and maintenance procedures outlined in this manual are not covered by the warranty. Warning
PERSONAL INJURY POTENTIAL
Do not operate equipment that has been, misused, abused, neglected, damaged, or altered/modified from that of original manufactured specifications.
i
Table of Contents
Table of Contents
Section 1 - General Information
Model Numbers...............................................................................................................................................1-1
Accessories.......................................................................................................................................................1-1
Model/Serial Number Location......................................................................................................................1-2
Owner Warranty Registration Card..............................................................................................................1-3
Warranty Coverage........................................................................................................................................1-3
Section 2 - Installation Instructions
General.............................................................................................................................................................2-1
Ice Machine Dimensions.................................................................................................................................2-1
Location of Ice Machine.................................................................................................................................2-3
Ice Machine Heat of Rejection.......................................................................................................................2-3
Leveling the Ice Machine................................................................................................................................2-4
Electrical Service.............................................................................................................................................2-5
Water Service/Drains......................................................................................................................................2-6
Installation Checklist......................................................................................................................................2-8
Before Starting the Ice Machine.....................................................................................................................2-8
Section 3 - Ice Machine Operation
Component Identification..............................................................................................................................3-1
Ice Making Sequence of Operation ...............................................................................................................3-2
Energized Parts Chart....................................................................................................................................3-3
Operational Checks
General......................................................................................................................................................3-4
Siphon System..........................................................................................................................................3-4
Water Level..............................................................................................................................................3-4
Ice Bridge Thickness................................................................................................................................3-5
ii
Table of Contents
Table of Contents (cont.)
Section 4 - Maintenance
General.............................................................................................................................................................4-1
Interior Cleaning and Sanitizing....................................................................................................................4-1
Cleaning and Sanitizing Procedure................................................................................................................4-1
Ice Machine Inspection...................................................................................................................................4-8
Exterior Cleaning............................................................................................................................................4-8
Cleaning the Condenser.................................................................................................................................4-9
Removal from Service/Winterization.............................................................................................................4-10
Section 5 - Before Calling for Service
Checklist...........................................................................................................................................................5-1
Safety Limit Feature.......................................................................................................................................5-2

Important
Complete and mail the OWNER WARRANTY REGISTRATION CARD as soon as possible to validate the installation
date.
If you do not return your OWNER WARRANTY REGISTRATION CARD, Manitowoc will use the date of sale to the Manitowoc Distributor as the first day of warranty coverage for your new ice machine.
Warranty Coverage
GENERAL
The following Warranty outline is provided for your convenience. For a detailed explanation, read the warranty bond
 shipped with each product.
Contact your local Manitowoc representative or Manitowoc Ice, Inc. if you need further warranty information.
Important
This product is intended exclusively for commercial application. No warranty is extended for personal, family, or household purposes.
PARTS
1. Manitowoc warrants the ice machine against defects in materials and workmanship, under normal use and service for
 three (3) years from the date of original installation.
2. The evaporator and compressor are covered by an additional two (2) year (five years total) warranty beginning on the
date of the original installation.
LABOR
1. Labor required to repair or replace defective components is covered for three (3) years from the date of original
installation.
2. The evaporator is covered by an additional two (2) year (five years total) labor warranty beginning on the date of the
original installation.
EXCLUSIONS
The following items are not included in the ice machine’s warranty coverage:
1. Normal maintenance, adjustments and cleaning as outlined in this manual.
2. Repairs due to unauthorized modifications to the ice machine or use of non-standard parts without prior written approval from Manitowoc Ice, Inc.
3. Damage caused by improper installation of the ice machine, electrical supply, water supply or drainage, or damage
caused by floods, storms, or other acts of God.
4. Premium labor rates due to holidays, overtime, etc.; travel time; flat rate service call charges; mileage and miscellaneous
tools and material charges not listed on the payment schedule. Additional labor charges resulting from the inaccessibility of equipment are also excluded.
5. Parts or assemblies subjected to misuse, abuse, neglect or accidents.
6. Damage or problems caused by installation, cleaning and/or maintenance procedures inconsistent with the technical instructions provided in this manual.
7. This product is intended exclusively for commercial application. No warranty is extended for personal, family, or
 household purposes.
AUTHORIZED WARRANTY SERVICE
To comply with the provisions of the warranty, a refrigeration service company, qualified and authorized by your
Manitowoc distributor, or a Contracted Service Representative must perform the warranty repair.
NOTE: If the dealer you purchased the ice machine from is not authorized to perform warranty service, contact your Manitowoc distributor or Manitowoc Ice, Inc. for the name of the nearest authorized service representative.
SERVICE CALLS
Normal maintenance, adjustments and cleaning as outlined in this manual are not covered by the warranty. If you have
followed the procedures listed on page 5-1 of this manual, and the ice machine still does not perform properly, call your authorized service company.

Installation Instructions
General
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 Ice, Inc. for information regarding start-up services.
Important
Failure to follow these installation guidelines may affect warranty coverage.

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 indoors.
• The location must be free of airborne and other contaminants.
• The air temperature must be at least 35°F (1.7°C), but must not exceed 110°F (43.4°C).
• 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.
• The location must allow enough clearance for water, drain and electrical connections in the rear of the ice machine.
• The location must not obstruct airflow through or around the ice machine (condenser airflow is in and out the front).

* NOTE: The ice machine may be built into a cabinet.
There is no minimum clearance requirement for the top or left and right sides of the ice machine. The listed values are recommended for efficient operation and servicing only.

The ice machine must be protected if it 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” on page 4-11.

** Because the heat of rejection varies during the ice making cycle, the figure shown is an average.
Ice machines, like other refrigeration equipment, reject heat through the condenser. It is helpful to know the amount of heat rejected by the ice machine when sizing air conditioning equipment where self-contained air-cooled ice machines are
installed.

Leveling the Ice Machine
1. Screw the leveling legs onto the bottom of the ice machine.
2. Screw the foot of each leg in as far as possible.

The legs must be screwed in tightly to prevent them from bending.
3. Move the ice machine into its final position.
4. Level the ice machine to assure that the siphon system functions correctly. Use a level on top of the ice machine.
Turn each foot as necessary to level the ice machine from front to back and side to side.
NOTE: An optional 2 ½" caster assembly is available for use in place of the legs on the Q130, Q210 and Q270.
Installation instructions are supplied with the casters.

All wiring must conform to local, state and national codes.
VOLTAGE
The maximum allowable voltage variation is ± 10% of the rated voltage on the ice machine model/serial number plate
at start-up (when the electrical load is highest).
The 115/1/60 ice machines are factory pre-wired with a 6’ power cord, and NEMA 5-20P-plug configuration.
The 208-230/1/60 and 230/50/1 ice machines are factory pre-wired with a 6’ power cord only, no plug is supplied.
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).
WARNING
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.
GROUND FAULT CIRCUIT INTERUPTER
Ground Fault Circuit Interupter (GFCI/GFI) protection is a system that shuts down the electric circuit (opens it) when it
senses an unexpected loss of power, presumably to ground. Manitowoc Ice, Inc. does not recommend the use of a
GFCI/GFI circuit protection with our equipment. If code requires the use of a GFCI/GFI then you must follow the local
code. The circuit must be dedicated, sized properly and there must be a panel GFCI/GFI breaker. We do not recommend GFCI/GFI outlets as they are known for more intermittent nuisance trips than panel breakers.

For United Kingdom Only
As the colours of the wires in the mains lead of the appliance may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows:
• The wire which is coloured green and yellow must be connected to the terminal in the plug which is marked with the letter E or by the earth ground symbol or coloured green or green and yellow.
• The wire coloured blue must be connected to the terminal which is marked with the letter N or coloured black.
• The wire coloured brown must be connected to the terminal which is marked with the letter L or coloured red.

Water Service/Drains
WATER SUPPLY
Local water conditions may require treatment of the water to inhibit scale formation, filter sediment, remove chlorine, and improve taste and clarity.
Important
If you are installing a Manitowoc Tri-Liminator water filter system, refer to the Installation Instructions supplied with the
filter system for ice making water inlet connections.
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 both the ice making and condenser water lines.
• Insulate water inlet lines to prevent condensation.
DRAIN CONNECTIONS
Follow these guidelines when installing drain lines to prevent drain water from flowing back into the ice machine and storage
 bin:
• Drain lines must have a 1.5 inch (3.8 cm)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.
• Run separate bin and water-cooled condenser drain lines. Insulate them to prevent condensation.
• Vent the bin drain to the atmosphere. Do not vent the condenser drain on water-cooled models.
COOLING TOWER APPLICATIONS
(Water-Cooled Models)
A water cooling tower installation does not require modification of the ice machine. The water regulator valve for the
condenser continues to control the refrigeration discharge pressure.
It is necessary to know the amount of heat rejection, (refer to page 2-3) and the pressure drop through the condenser and water valves (inlet and outlet) when using a cooling tower on an ice machine.
• Water entering the condenser must not exceed 90°F (32.2°C).
• Water flow through the condenser must not exceed 5 gallons (19 liters) per minute.
• Allow for a pressure drop of 7 psi (48 kPA) between the condenser water inlet and the outlet of the ice machine.
• Water exiting the condenser must not exceed 110°F (43.3°C).

The Commonwealth of Massachusetts requires that all water-cooled models must be connected only to a closed loop,
cooling tower system.

WATER SUPPLY AND DRAIN LINE SIZING/CONNECTIONS
Plumbing must conform to state and local codes.

Installation Checklist
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 ambient temperatures will remain in the range of 35° - 110°F (1.7° - 43.3°C)?
Has the ice machine been installed where the incoming water temperature will remain in the range of 33° - 90°F (0.6° - 32.2°C)?
Is there a separate drain line for the water-cooled condenser?
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 owner/operator completed the warranty registration card?
Has the ice machine and bin been sanitized?
Has this manual been given to the owner/operator?
Is the float valve in the OPEN position?
Before Starting the Ice Machine
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 on page 3-4 of this manual. Starting the ice machine and completing the Operational Checks are the responsibilities of the owner/operator.
Adjustments and maintenance procedures outlined in this manual are not covered by the warranty.
WARNING
PERSONAL INJURY POTENTIAL
Do not operate equipment that has been misused, abused, neglected, damaged, or altered/modified from that of original manufactured specifications.


Ice Making Sequence of Operation
INITIAL START-UP OR START-UP AFTER AUTOMATIC SHUT-OFF
1. Pressure Equalization
Before the compressor starts the hot gas valve is energized for 15 seconds to equalize pressures during the initial
refrigeration system start-up.
2. Refrigeration System Start-Up
The compressor starts after the 15-second pressure equalization, and remains on throughout the entire Freeze and Harvest Sequences. The hot gas valve remains on for 5 seconds during initial compressor start-up and then shuts off.
At the same time the compressor starts, the condenser fan motor (air-cooled models) is supplied with power throughout the entire Freeze and Harvest Sequences. The fan motor is wired through a fan cycle pressure control, therefore it may cycle
on and off. (The compressor and condenser fan motor are wired through the relay. As a result, any time the relay coil is energized, the compressor and fan motor are supplied with power.)
FREEZE SEQUENCE
3. Prechill
The compressor is on for 30 seconds prior to water flow to Prechill the evaporator.
4. Freeze
The water pump starts after the 30-second Prechill. An even flow of water is directed across the evaporator and into each
cube cell, where it freezes.
When sufficient ice has formed, the water flow (not the ice) contacts the ice thickness probe. After approximately 7
seconds of continual water contact, the Harvest Sequence is initiated. The ice machine cannot initiate a Harvest Sequence
until a 6-minute freeze time has been surpassed.
HARVEST SEQUENCE
5. Harvest
The water pump de-energizes stopping flow over the evaporator. The rising level of water in the sump trough diverts water
out of the overflow tube, purging excess minerals from the sump trough. The hot gas valve also opens to divert hot
efrigerant gas into the evaporator.
The refrigerant gas warms the evaporator causing the cubes to slide, as a sheet, off the evaporator and into the storage bin.
The sliding sheet of cubes contacts the ice damper, opening the bin switch.
The momentary opening and re-closing of the bin switch terminates the Harvest Sequence and returns the ice machine to
the Freeze Sequence (steps 3 - 4).
AUTOMATIC SHUT-OFF
6. Automatic Shut-Off
When the storage bin is full at the end of a Harvest Sequence, the sheet of cubes fails to clear the ice damper and will
hold it down. After the ice damper is held open for 7 seconds, the ice machine shuts off. The ice machine remains off for 3 minutes before it can automatically restart.
The ice machine remains off until enough ice has been removed from the storage bin to allow the ice to fall clear of the
damper. As the ice damper swings back to the operating position, the bin switch re-closes and the ice machine restarts
(steps 1 - 2), provided the 3-minute delay period is complete.

Operational Checks
GENERAL
Your Manitowoc ice machine was factory-operated and adjusted before shipment. Normally, a newly installed ice machine does not require any adjustment.
To ensure proper operation, always follow these Operational Checks when starting the ice machine:
• for the first time
• after a prolonged out of service period
• after cleaning and sanitizing
Routine adjustments and maintenance procedures outlined in this manual are not covered by the warranty.
SIPHON SYSTEM
To reduce mineral build-up and cleaning frequency, the water in the sump trough must be purged during each harvest cycle.
When the water pump de-energizes the level in the water trough rises above the standpipe starting a siphon action.
The siphon action stops when the water level in the sump trough drops. When the siphon action stops, the float valve
refills the water trough to the correct level.
Siphon System Check
Follow steps 1 through 6 under water level check.
WATER FLOAT VALVE CHECK
Before water will flow into the water trough the float valve shut-off must be in the OPEN position.

WATER LEVEL CHECK
Check the water level while the ice machine is in the ice mode and the water pump is running. The correct water level is
1/4" (6.3mm) to 3/8″ (9.5mm) below the top of the standpipe a line in the water trough indicates the correct level.
Water Level
The float valve is factory-set for the proper water level. If adjustments are necessary:
1. Verify the ice machine is level (see page 2-4).
2. Remove the siphon cap from the standpipe.
3. Place the main ON/OFF/WASH toggle switch to the ON position, and wait until the float valve stops adding water.
4. Adjust the water level to (1/4" to 3/8"
(6.3 to 9.5 mm) below the standpipe) the line in
the water trough:
A Loosen the two screws on the float valve bracket.
B Raise or lower the float valve assembly as necessary, then tighten the screws.
5. Move the main ON/OFF/ WASH toggle switch to the OFF position. The water level in the trough will rise above the standpipe and run down the drain.
6. Replace the siphon cap on the standpipe, and verify water level and siphon action by repeating steps 3 through 5.
ICE BRIDGE THICKNESS CHECK
The ice thickness probe is factory-set to maintain the ice bridge thickness at 1/8” (3.2 mm).
1. Inspect the bridge connecting the cubes. It should be about 1/8” (3.2 mm) thick.
2. If adjustment is necessary, turn the ice thickness probe adjustment screw clockwise to increase bridge thickness, or counterclockwise to decrease bridge thickness.

Maintenance
Interior Cleaning and Sanitizing
GENERAL
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.
The ice machine must be taken apart for cleaning and sanitizing.

Use only Manitowoc approved Ice Machine Cleaner (part number 94-0546-3) 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.
CLEANING AND SANITIZING PROCEDURE

Do not mix Ice Machine Cleaner and Sanitizer solutions together. It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling.
WARNING
Wear rubber gloves and safety goggles (and/or face shield) when handling Ice Machine Cleaner or Sanitizer.
Ice machine cleaner is used to remove lime scale and mineral deposits. Ice machine sanitizer disinfects and removes algae
and slime.
Step 1: Set the toggle switch to the OFF position after ice falls from the evaporator at the end of a Harvest cycle. Or, set
the switch to the OFF position and allow the ice to melt off the evaporator.

Never use anything to force ice from the evaporator.
Damage may result.
Step 2: Remove all ice from the bin.
Step 3: To start a cleaning cycle, move the toggle switch to the WASH position.
Step 4 Add the proper amount of Manitowoc Ice Machine Cleaner to the water trough.
Amount of Cleaner Q130 1 ounces (30 ml)
Q210 2 ounces (60 ml) Q270 2 ounces (60 ml)
Step 5 Wait until the clean cycle is complete (approximately 22 minutes) then place the toggle switch in the OFF position, disconnect power and water supplies to the ice machine.

Maintenance Section 4

Disconnect electric power to the ice machine at the electric switch box before proceeding.
Step 6: Remove parts for cleaning.
A. Remove the Vinyl Hose
• Disconnect the water hose from the distribution tube and water pump.
B. Remove Water Pump
• Disconnect the water pump power cord
Water Pump Removal
• Loosen the screws securing the pump-mounting bracket to the bulkhead.
• Lift the pump and bracket assembly off the mounting screws.
C. Remove the Ice Thickness Probe
• Compress the side of the ice thickness probe near the top hinge pin and remove it from the bracket.
ICE THICKNESS PROBE
SV1138A
COMPRESS SIDES OF ICE THICKNESS PROBEDO
NOT SOAK WATPUMP MOTOR IN CLEANER OR SANITIZER SOLUTIONS

Ice Thickness Probe Removal
NOTE: At this point, the ice thickness probe can easily be cleaned. If complete removal is desired follow the ice thickness probe wire to the bulkhead grommet (exit point) in the back wall. Pop the bulkhead grommet out of the back wall by
inserting fingernails or a flat object between the back wall and the grommet and prying forward. Pull the bulkhead grommet
and wire forward until the connector is accessible, then disconnect the wire lead from the connector.
Ice Thickness Probe Cleaning
• Mix a solution of Manitowoc ice machine cleaner and water (2 ounces of cleaner to 16 ounces of water) in a container.
• Soak the ice thickness probe a minimum of 10 minutes.
Clean all ice thickness probe surfaces and verify the ice thickness probe cavity is clean. Rinse thoroughly with clean water,
then dry completely. Incomplete rinsing and drying of the ice thickness probe can cause premature harvest.

D. Remove the Water Distribution Tube
Q210/Q270 Models
Water Distribution Tube Removal
• Loosen the two thumbscrews, which secure the distribution tube.
• Lift the right side of the distribution tube up off the locating pin, then slide it back and to the right.
Do not force this removal. Be sure the locating pin is clear of the hole before sliding the distribution tube out. Disassembly
• Twist both of the inner tube ends until the tabs line up with the keyways.
• Pull the inner tube ends outward.
Water Distribution Tube Disassembly
Q130 Models
Water Distribution Tube Removal
• Loosen the two thumbscrews, which secure the distribution tube.
• Lift the distribution tube up off the thumbscrews. Disassembly
• Twist the barbed end until the tab lines up with the keyway.
• Pull the inner tube end outward.

E. Remove the Float Valve
• Turn the splash shield counterclockwise one or two turns.
Float Valve Removal
• Pull the float valve forward and off the mounting bracket.
• Disconnect the water inlet tube from the float valve at the compression fitting.
• Remove the cap and filter screen for cleaning.
F. Remove the Water Trough
• Apply downward pressure on the siphon tube and remove from the bottom of the water trough.
• Remove the upper thumbscrew.
• While supporting the water trough remove the two thumbscrews from beneath the water trough.
• Remove the water trough from the bin area
G. Remove the Ice Damper
Q130
• Grasp left side of ice damper and apply pressure against the right-hand ice damper mounting bracket.
• Pull forward on the ice damper until the left-hand mounting pin disengages.
Installation
• Grasp the right side of ice damper and place left hand pin in the mounting bracket.
• While applying pressure against the left-hand mounting bracket push the damper until the right-hand mounting pin engages.
Q210/Q270
• Grasp ice damper and apply pressure toward the left hand mounting bracket.
• Apply pressure to the right hand mounting bracket with thumb.
• Pull ice damper forward when the right hand ice damper pin disengages.
Installation
• Place ice damper pin in left hand mounting bracket and apply pressure toward the left hand mounting bracket.
• Apply pressure to the right hand mounting bracket with thumb.
• Push ice damper toward evaporator until right hand damper pin engages.
4-6
Maintenance Section 4
H. Remove the Bin Door
• Grasp the rear of the bin door and pull bin door forward approximately 5”.
• Slide bin door to the rear while applying upward pressure (The rear door pins will ride up into the track slot and slide backward to the stop tab).
• While applying pressure against the bin door pull down on the rear of each bin door track until the door pins clear the
stop tabs.
• Slide the rear door pins off the end and then below the door track. Slide bin door forward allowing the back of the door
to lower into the bin. Continue forward with the bin door until the front pins bottom out in the track.
• Lift right side of door until the front pins clear the track, then remove door from bin.
Step 7 Mix a solution of cleaner and warm water. Depending on 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
Step 8 Use ½ of the cleaner/water solution 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 brush, sponge or cloth (not a wire brush) to carefully
clean the parts. Soak the parts for 5 minutes (15 – 20 minutes for heavily scaled parts). Rinse all components with clean
water.
Step 9 While components are soaking, use ½ of the cleaner/water solution to clean all foodzone surfaces of the ice machine
and bin. Use a nylon brush or cloth to thoroughly clean the following ice machine areas:
PRESS DOWN TO RELEASE DOOR
• Evaporator plastic parts – including top, bottom and sides
• Bin bottom, sides and top
Rinse all areas thoroughly with clean water.
Step 10 Mix a solution of sanitizer and warm water.
Solution Type Water Mixed With Sanitizer 6 gal. (23 l) 4 oz (120 ml) sanitizer
Step 11 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.

Step 12 Use 1/2 of the sanitizer/water solution to sanitize all foodzone surfaces of the ice machine and bin. Use a cloth or sponge to liberally apply the solution. When sanitizing, pay particular attention to the following areas:
• Evaporator plastic parts - including top, bottom and sides
• Bin bottom, sides and top
Do not rinse the sanitized areas.
Step 13 Replace all removed components.
Step 14 Reapply power and water to the ice machine and place the toggle switch in the WASH position.
Step 15 Add the proper amount of Manitowoc Ice Machine Sanitizer to the water trough.

Step16 Wait until the sanitize cycle is complete (approximately 22 minutes) then place the toggle switch in the OFF position, disconnect power and water supplies to the ice machine.

Disconnect electric power to the ice machine at the electric switch box before proceeding.
Step 17 Repeat step 6 to remove parts for hand sanitizing.Step 18 Mix a solution of sanitizer and warm water.
Solution Type Water Mixed With Sanitizer 6 gal. (23 l) 4 oz (120 ml) sanitizer
Step 19 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.
Step 20 Use 1/2 of the sanitizer/water solution to sanitize all foodzone surfaces of the ice machine and bin. Use a cloth or sponge to liberally apply the solution. When sanitizing, pay particular attention to the following areas:
• Evaporator plastic parts - including top, bottom and sides
• Bin bottom, sides and top
Do not rinse the sanitized areas.
Step 21 Replace all removed components.
Step 22 Reapply power and water to the ice machine and place the toggle switch in the ICE position.

ICE MACHINE INSPECTION
Check all water fittings and lines for leaks. Also, make sure the refrigeration tubing is not rubbing or vibrating against other tubing, panels, etc.
Do not put anything (boxes, etc.) in front of the ice machine. There must be adequate airflow through and around the ice machine to maximize ice production and ensure long component life.
EXTERIOR CLEANING
Clean the area around the ice machine as often as necessary to maintain cleanliness and efficient operation.
Sponge any dust and dirt off the outside of the ice machine with mild soap and water. Wipe dry with a clean, soft cloth.
A commercial grade stainless steel cleaner/polish can be used as necessary.

CLEANING THE CONDENSER

Disconnect electric power to the ice machine 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.
WARNING
The condenser fins are sharp. Use care when cleaning them.
1. The washable aluminum filter on self-contained ice machines 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 soft 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: Blow compressed air through
the condenser fins from the inside. Be careful not to bend the fan blades.
4. Use a commercial condenser coil cleaner. Follow the directions and cautions supplied with the cleaner.
5. Straighten any bent condenser fins with a fin comb.
6. 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.

If you are cleaning the condenser fan blades with water, cover the fan motor to prevent water damage.
Water-Cooled Condenser and Water Regulating Valve
The water-cooled condenser and water regulating valve may require cleaning due to scale build-up.
Low ice production, high water consumption and high operating temperatures and pressures all may be symptoms of restrictions in the condenser water circuit.
Because the cleaning procedures require special pumps and cleaning solutions, they must be performed by qualified maintenance or service personnel.

REMOVAL FROM SERVICE WINTERIZATION
Special precautions must be taken if the ice machine is to be removed from service for an extended period of time or
xposed 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 applicable procedure below.
SELF-CONTAINED AIR-COOLED ICE MACHINES
1. Disconnect the electric power at the circuit breaker or the electric service switch.
2. Turn off the water supply.
3. Remove the water from the water trough.
4. Disconnect and drain the incoming ice-making water line at the rear of the ice machine.
5. Blow compressed air in both the incoming water and the drain openings in the rear of the ice machine until no more water comes out of the inlet water lines or the drain.
6. Make sure water is not trapped in any of the water lines, drain lines, distribution tubes, etc.
WATER-COOLED ICE MACHINES
Perform steps 1-6 under “Self-Contained Air-Cooled Ice Machines.”
1. Disconnect the incoming water and drain lines from the water-cooled condenser.
2. Insert a large screwdriver between the bottom spring coils of the water regulating valve. Pry upward to open the valve.

Pry Open the Water Regulating Valve
3. Hold the valve open and blow compressed air through the condenser until no water remains.

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.
Ice machine does not operate.
No electrical power to the ice machine.
Replace the fuse/reset the breaker/turn on the main switch/plug power cord into receptacle.
ON/OFF/ WASH toggle switch set improperly.
Move the toggle switch to the ON position.
Damper in open position (down).
Damper must be in upright position and capable of swinging freely.
Ice machine stops, and can be restarted by moving the toggle switch to OFF and back to ICE.
Safety limit feature stopping the ice machine.
Refer to “Safety Limit Feature” on the next page.
Ice machine does not release ice or is slow to harvest.
Ice machine is dirty.
Clean and sanitize the ice machine. See pages 4-1.
Ice machine is not level.
Level the ice machine. See page 2-4.
Low air temperature around ice machine (air-cooled models).
Air temperature must be at least 35°F (1.7°C).
Water regulating valve leaks in harvest mode (water-cooled models).
Replace water regulating valve.
Ice machine does not cycle into harvest mode.
The six-minute freeze time lock-in has not expired yet.
Wait for freeze lock-in to expire.
Ice thickness probe is dirty.
Clean and sanitize the ice machine. See pages 4-1.
Ice thickness probe wire is disconnected.
Connect the wire.
Ice thickness probe is out of adjustment.
Adjust the ice thickness probe. See page 3-5.
Uneven ice fill (thin at top of evaporator).
Ice quality is poor (soft or not clear).
Poor incoming water quality.
Contact a qualified service company to test the quality of the incoming water and make appropriate filter recommendations.
Water filtration is poor. Replace the filter.
Ice machine is dirty. Clean and sanitize the ice machine. See pages 4-1.
Water siphon is not working. Check the water siphon system.
Water softener is working improperly (if applicable). Repair the water softener.

Ice machine produces shallow or incomplete cubes, or the ice Ice thickness probe is out of adjustment.
Adjust the ice thickness probe. See page 3-5. fill pattern on the evaporator is incomplete.
Water trough level is to high or too low. Check the water level. See page 3-4.
Water float valve filter screen is dirty. Remove and clean the filter screen. See page 4-4.
Water filtration is poor. Replace the filter.
Hot incoming water. Connect the ice machine to a cold water supply. See page 2-7.
Water float valve is not working. Remove the water float valve and clean it. See page 4-4.
Incorrect incoming water pressure. Water pressure must be 20-80 psi (137.9 - 551.5 kPA).
Ice machine is not level. Level the ice machine.

Low ice capacity.
Water float valve filter screen is dirty. Remove and clean the filter screen. See page 4-8.
Incoming water supply is shut off. Open the water service valve.
Water float valve stuck open or leaking. Remove the water float valve and clean it. See page 4-4.
The condenser is dirty. Clean the condenser. See page 4-9.
High air temperature around ice machine (air-cooled models).
Air temperature must not exceed 110°F (43.3°C). Inadequate clearance around the ice machine.
Provide adequate clearance.

Objects stacked around ice machine, blocking airflow to condenser (air-cooled models).
Remove items blocking airflow.
Safety Limit Feature
In addition to the standard safety controls, your Manitowoc ice machine features built-in safety limits that will stop the ice machine if conditions arise which could cause a major component failure.
Before calling for service, re-start the ice machine using the following procedure:
1. Move the ON/OFF/ WASH switch to OFF and then back to ON.
A. If the safety limit 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, see “Ice machine does not operate” on the previous page.
2. Allow the ice machine to run to determine if the condition is reoccurring.
A. If the ice machine stops again, the condition has reoccurred. Call for service.
B. If the ice machine continues to run, the condition has corrected itself. Allow the ice machine to continue running.

In addition to standard safety controls, the control board has two built in safety limit controls which protect the ice machine from major component failures.
Safety Limit #1: If the freeze time reaches 60 minutes, the control board automatically initiates a harvest cycle. If three consecutive 60-minute freeze cycles occur, the ice machine stops.
Safety Limit #2: If the harvest time reaches 3.5 minutes, the control board automatically returns the ice machine to the freeze cycle. If three consecutive 3.5 minute harvest cycles occur, the ice machine stops.
Safety Limit Stand-By Mode:
The first time a safety limit shut down occurs, the ice machine turns off for 60 minutes (Stand-by Mode). The ice machine
will then automatically restart to see if the problem reoccurs. During the Stand-By Mode the harvest light will be flashing continuously and a safety limit indication can be viewed. If the same safety limit is reached a second time (the problem has reoccurred) the ice machine will initiate a safety limit shut down and remain off until it is manually restarted. During a safety
limit shut down the harvest light will be flashing continuously.
Determining Which Safety Limit Stopped The Ice Machine
When a safety limit condition causes the ice machine to stop, the harvest light on the control board continually flashes on
and off. Use the following procedures to determine which safety limit has stopped the ice machine.
1. Move the toggle switch to OFF.
2. Move the toggle switch back to ON.
3. Watch the harvest light. It will flash one or two times, corresponding to safety limits 1 and 2, to indicate which safety limit stopped the ice machine.
After safety limit indication, the ice machine will restart and run until a safety limit is exceeded again. Safety Limit Notes
• A safety limit indication is completed before the water pump starts. Water contacting the ice thickness probe in the freeze cycle will cause the harvest light to flash. Do not mistake a harvest light flashing in the freeze cycle with a safety limit
indication.
• A continuous run of 100 harvests automatically erases the safety limit code.
• The control board will store and indicate only one safety limit – the last one exceeded.
• If the toggle switch is moved to the OFF position and then back to the ON position prior to reaching the 100-harvest
point, the last safety limit exceeded will be indicated.
• If the harvest light did not flash prior to the ice machine restarting, then the ice machine did not stop because it exceeded a safety limit.

Freeze time exceeds 60 minutes for 3 consecutive freeze cycles.
Possible Cause
Improper installation
• See “Installation Instructions” Section 2 of this manual Water system
• Low water pressure (20 psi minimum.)
• High water pressure (80 psi maximum.)
• High water temperature (90°F/32.2°C maximum.)
• Clogged water distribution tube
• Dirty/defective water float valve
• Loss of water from sump area
• Defective water pump
Electrical system
• Ice thickness probe out of adjustment
• Harvest cycle not initiated electrically
• Compressor relay not energizing
• Compressor electrically non-operational
Restricted condenser air flow (air-cooled models)
• High inlet air temperature (110°F/43.3°C maximum.)
• Condenser discharge air recirculation
• Dirty condenser filter
• Dirty condenser fins
• Defective fan cycling control
• Defective fan motor
Refrigeration system
• Non-Manitowoc components
• Improper refrigerant charge
• Defective hot gas valve
• Defective compressor
• TXV starving or flooding (check insulation and bulb mounting)
• Non-condensables in refrigeration system
• Plugged or restricted high side refrigerant lines or component
Safety Limit #2
Harvest time exceeds 3.5 minutes for 3 consecutive harvest cycles.
Possible Cause
Check/Correct
Improper installation
• See “Installation Instructions” Section 2 of this manual Water system
• Water area (evaporator) dirty
• Water freezing behind evaporator
• Low water pressure (20 psi minimum.)
• Loss of water from sump area
• Clogged water distribution tube
• Dirty/defective water float valve
• Defective water pump
Electrical system
• Ice thickness probe out of adjustment
• Ice thickness probe dirty
• Bin switch defective
• Premature harvest
Refrigeration system
• Non-Manitowoc components
• Improper refrigerant charge
• Defective hot gas valve
• TXV flooding (check insulation and bulb mounting)
• Defective fan cycling control
Because there are many possible external problems,
do not limit your diagnosis to only the items listed in these charts.