Manitowoc UR0140A, UD0140W, UY0140A, UY0140W, UR0140AE Installation, Operation And Maintenance Manual
...
UnderCounter Ice Machines
Installation, Operation and Maintenance Manual
Part Number: 04002909 Rev02 4/16
Safety Notices
Safety Notices
Read these precautions to prevent personal injury:
• Read this manual thoroughly before operating,
installing or performing maintenance on the
equipment. Failure to follow instructions in this
manual can cause property damage, injury or death.
• Routine adjustments and maintenance procedures
outlined in this manual are not covered by the
warranty.
• Proper installation, care and maintenance are essential
for maximum performance and trouble-free operation
of your equipment.
Visit our website www.manitowocice.com for manual
updates, translations, or contact information for
service agents in your area.
• This equipment contains high voltage electricity and
refrigerant charge. Installation and repairs are to be
performed by properly trained technicians aware of
the dangers of dealing with high voltage electricity
and refrigerant under pressure. The technician must
also be certified in proper refrigerant handling
and servicing procedures. All lockout and tag out
procedures must be followed when working on this
equipment.
• This equipment is intended for indoor use only. Do
not install or operate this equipment in outdoor areas.
Warning
n
Follow these electrical requirements during
installation of this equipment.
• All field wiring must conform to all applicable
codes of the authority having jurisdiction. It is
the responsibility of the end user to provide the
disconnect means to satisfy local codes. Refer to rating
plate for proper voltage.
• This appliance must be grounded.
• This equipment must be positioned so that the plug is
accessible unless other means for disconnection from
the power supply (e.g., circuit breaker or disconnect
switch) is provided.
• Check all wiring connections, including factory
terminals, before operation. Connections can become
loose during shipment and installation.
Warning
n
Follow these precautions to prevent personal injury
during installation of this equipment:
• Installation must comply with all applicable
equipment fire and health codes with the authority
having jurisdiction.
• To avoid instability the installation area must be
capable of supporting the combined weight of the
equipment and product. Additionally the equipment
must be level side to side and front to back.
• Remove all removable panels before lifting and
installing and use appropriate safety equipment
during installation and servicing. Two or more people
are required to lift or move this appliance to prevent
tipping and/or injury.
• Do not damage the refrigeration circuit when
installing, maintaining or servicing the unit.
• Connect to a potable water supply only.
• This equipment contains refrigerant charge.
Installation of the line sets must be performed by
a properly trained and EPA certified refrigeration
technician aware of the dangers of dealing with
refrigerant charged equipment.
• Legs or casters must be installed and the legs/casters
must be screwed in completely. When casters are
installed, the mass of this unit will allow it to move
uncontrolled on an inclined surface. These units must
be tethered/secured to comply with all applicable
codes. Swivel casters must be mounted on the front
and rigid casters must be mounted on the rear. Lock
the front casters after installation is complete.
• Some 50 Hz models may contain up to 150 grams
of R290 (propane) refrigerant. R290 (propane)
is flammable in concentrations of air between
approximately 2.1% and 9.5% by volume (LEL lower
explosion limit and UEL upper explosion limit). An
ignition source at a temperature higher than 470°C is
needed for a combustion to occur. Refer to nameplate
to identify the type of refrigerant in your equipment.
Only trained and qualified personnel aware of the
dangers are allowed to work on the equipment.
Warning
n
Follow these precautions to prevent personal injury
while operating or maintaining this equipment:
• Read this manual thoroughly before operating,
installing or performing maintenance on the
equipment. Failure to follow instructions in this
manual can cause property damage, injury or death.
• Moisture collecting on the floor will create a slippery
surface. Clean up any water on the floor immediately
to prevent a slip hazard.
• Objects placed or dropped in the bin can affect
human health and safety. Locate and remove any
objects immediately.
• Never use sharp objects or tools to remove ice or frost.
Do not use mechanical devices or other means to
accelerate the defrosting process.
• When using cleaning fluids or chemicals, rubber
gloves and eye protection (and/or face shield) must
be worn.
DANGER
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. Do
not allow children to play with, clean or maintain this
appliance without proper supervision.
DANGER
Follow these precautions to prevent personal injury
during use and maintenance of this equipment:
• It is the responsibility of the equipment owner to
perform a Personal Protective Equipment Hazard
Assessment to ensure adequate protection during
maintenance procedures.
• Do Not Store Or Use Gasoline Or Other Flammable
Vapors Or Liquids In The Vicinity Of This Or Any Other
Appliance. Never use flammable oil soaked cloths or
combustible cleaning solutions for cleaning.
• All covers and access panels must be in place and
properly secured when operating this equipment.
• Risk of fire/shock. All minimum clearances must be
maintained. Do not obstruct vents or openings.
• Failure to disconnect power at the main power supply
disconnect could result in serious injury or death.
The power switch DOES NOT disconnect all incoming
power.
• All utility connections and fixtures must be
maintained in accordance with the authority having
jurisdiction.
• Turn off and lockout all utilities (gas, electric, water)
according to approved practices during maintenance
or servicing.
• Never use a high-pressure water jet for cleaning on
the interior or exterior of this unit. Do not use power
cleaning equipment, steel wool, scrapers or wire
brushes on stainless steel or painted surfaces.
• Two or more people are required to move this
equipment to prevent tipping.
• Locking the front casters after moving is the owner’s
and operator’s responsibility. When casters are
installed, the mass of this unit will allow it to move
uncontrolled on an inclined surface. These units must
be tethered/secured to comply with all applicable
codes.
• The on-site supervisor is responsible for ensuring that
operators are made aware of the inherent dangers of
operating this equipment.
• Do not operate any appliance with a damaged cord
or plug. All repairs must be performed by a qualified
service company.
Safety Notices
Section 1
General Information
Section 2
Installation
Table of Contents
Safety Notices ..................................................................................................................... 3
Model Numbers .................................................................................................................. 7
Shipping Weight .....................................................................................................................................7
Accessories .......................................................................................................................... 7
Bin Caster ..................................................................................................................................................7
Arctic Pure Water Filter system ..........................................................................................................7
Manitowoc Cleaner and Sanitizer ....................................................................................................7
LuminIce® ..................................................................................................................................................7
Cleanup Procedure for Accidental Bulb Breakage .....................................................................7
Location of Ice Machine ..................................................................................................... 9
Leveling the Ice Machine .....................................................................................................................9
Electrical Service ..............................................................................................................10
Voltage .................................................................................................................................................... 10
Fuse/Circuit Breaker ...........................................................................................................................10
Total Circuit Ampacity ....................................................................................................................... 10
Ground Fault Circuit Interrupter .................................................................................................... 10
Electrical Specifications..................................................................................................................... 10
Water Service/Drains .......................................................................................................11
Water Supply ......................................................................................................................................... 11
Water Inlet Lines .................................................................................................................................. 11
Drain Connections .............................................................................................................................. 11
Cooling Tower Applications ............................................................................................................. 11
Water Supply & Drain Line Sizing Connections ........................................................................ 11
Ice Thickness Adjustment ................................................................................................ 12
Before Starting the Ice Machine ......................................................................................12
Installation Checklist .......................................................................................................................... 12
Part Number: 04002909 Rev02 4/16 5
Section 3
Operation
Section 4
Maintenance
Section 5
Troubleshooting
Table of Contents (continued)
Touch Pad Features ..........................................................................................................13
Ice Making Sequence of Operation .................................................................................14
Safety Limits .......................................................................................................................................... 14
Interior Cleaning and Sanitizing ..................................................................................... 15
General .................................................................................................................................................... 15
Cleaning and Sanitizing Procedures ...............................................................................15
Remove Parts for Cleaning ...............................................................................................................17
Preventative Maintenance Cleaning ............................................................................................ 18
Ice Machine Inspection ..................................................................................................................... 18
Exterior Cleaning ................................................................................................................................. 18
Cleaning the Condenser ................................................................................................................... 18
Removal from Service/Winterization .............................................................................18
Checklist ............................................................................................................................ 19
Safety Limit Feature .........................................................................................................20
6 Part Number: 04002909 Rev02 4/16
Section 1
General Information
Model Numbers
This manual covers the following models:
Self-Contained
Air-Cooled
UD0140A UD0140W
UD0140AE
UY0140A UY0140W
UY0140AE
UR0140A
UR0140AE
UD0190A
UD0190AE
UY0190A
UY0190AE
UR0190A
UR0190AE
UD0240A
UD0240W
UD0240AE UD0240WE
UY0240A UY0240W
UY0240AE UY0240WE
UR0240A
UR0240AE
UD0310A UD0310W
UD0310AE
UY0310A UY0310W
UY0310AE
UR0310A UR0310W
UR0310AE
SHIPPING WEIGHT
Model Family Shipping Weight
U0140 153 lbs (69 kg)
U0190 153 lbs (69 kg)
U0240 160 lbs (73 kg)
U0310 211 lbs (96 kg)
Self-Contained
Water-Cooled
Accessories
Contact your Manitowoc distributor for these optional
accessories:
BIN CASTER
Replaces standard legs.
ARCTIC PURE WATER FILTER SYSTEM
Engineered specifically for Manitowoc ice machines,
Arctic Pure water filters are an efficient, dependable, and
affordable method of inhibiting scale formation, filtering
sediment, and removing chlorine taste and odor.
MANITOWOC CLEANER AND SANITIZER
Manitowoc Ice Machine Cleaner and Sanitizer are available
in convenient 16 oz. (473 ml) and 1 gal (3.78 l) bottles. These
are the only cleaner and sanitizer approved for use with
Manitowoc products.
LUMINICE®
The LuminIce™ growth inhibitor recirculates the air in the
ice machine foodzone over a UV bulb. This process will
inhibit the growth of common micro-organisms on all
exposed foodzone surfaces.
NOTE: LuminIce® bulbs require replacement on a yearly
basis.
CLEANUP PROCEDURE FOR ACCIDENTAL BULB
BREAKAGE
The cleanup procedure is identical to the procedure used
to clean up compact fluorescent (CFL) or fluorescent tube
lights. These lights contain a small amount of mercury
sealed within a glass tube. Breaking these types of lights
will release mercury and mercury vapor. The broken bulb
can continue to release mercury vapor until it is cleaned up
and removed.
The latest EPA procedures can be viewed on their website at
www.epa.gov/cfl/cflcleanup.html.
Part Number: 04002909 Rev02 4/16 7
General Information Section 1
THIS PAGE INTENTIONALLY LEFT BLANK
8 Part Number: 04002909 Rev02 4/16
Section 2
Installation
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 40°F (4°C), but
must not exceed 110°F (43°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). Refer to the chart below for clearance
requirements.
• The location must not be near garbage or other
contaminants.
• The ice machine must use legs or be sealed to the floor.
Before sealing to the floor, the rubber bumpers on the
bottom of the ice machine must be removed.
Location
Top/Sides 5 (127 mm) 5 (127 mm)
Back 5 (127 mm) 5 (127 mm)
Self-Contained
Air-Cooled
Self-Contained
Water-Cooled
Series Ice Machine Heat of Rejection*
Ice Machine Air Conditioning** Peak
U140 2400 2900
U190 2200 2600
U240 2400 3400
U310 3800 6000
* B.T.U./Hour
** 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.
3. Move the ice machine into its final position.
4. Level the ice machine by using 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: 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.
Part Number: 04002909 Rev02 4/16 9
Installation Section 2
Electrical Service
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 an 8'
power cord and NEMA 5-15P-plug configuration.
The 208-230/1/60 and 230/50/1 ice machines are factory
pre-wired with an 8' power cord only, no plug is supplied.
FUSE/CIRCUIT BREAKER
A separate fuse/circuit breaker must be provided for each
ice machine.
ELECTRICAL SPECIFICATIONS
Ice Machine Voltage Phase Cycle
115/1/60 15 5.0 15 5.0
U140
U190
U240
U310
208-230/1/60 15 2.5 – –
230/1/50 15 2.5 – –
115/1/60 15 6.0 – –
208-230/1/60 15 2.5 – –
230/1/50 15 2.5 – –
115/1/60 15 7.0 15 6.0
208-230/1/60 15 4.0 15 3.0
230/1/50 15 4.0 15 3.0
115/1/60 15 10.0 15 10.0
208-230/1/60 15 4.5 15 4.0
230/1/50 15 4.5 – –
Maximum Fuse/
Circuit Breaker
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 INTERRUPTER
Ground Fault Circuit Interrupter (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 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.
Air-Cooled Water-Cooled
Total Amps
Maximum Fuse/
Circuit Breaker
Total Amps
10 Part Number: 04002909 Rev02 4/16
Section 2 Installation
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.
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-
551.5kPa) 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 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 ice machine drain. 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 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°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°C).
WATER SUPPLY & DRAIN LINE SIZING CONNECTIONS
Location Water Temperature Water Pressure Ice Machine Fitting
Ice Making Water
Inlet
Condenser Water
Inlet
Condenser Water
Drain
Bin Drain --- --- 1/2 Female Pipe Thread
40°F (4°C) Min.
90°F (32°C) Max.
40°F (4°C) Min.
90°F (32°C) Max.
--- --- 1/2 Female Pipe Thread
Part Number: 04002909 Rev02 4/16 11
20 psi (137.9 kPa) Min.
80 psi (551.5 kPa) Max.
20 psi (137.9 kPa) Min.
150 psi (1034.2 kPa) Max
3/8 Female Pipe Thread
3/8 Female Pipe Thread
U310 Only
1/2 Female Pipe Thread
Tubing Size Up To The Ice Machine
Fitting
3/8 (9.5 mm)
minimum inside diameter
3/8 (9.5 mm)
minimum inside diameter
U310 Only
1/2 (12.7 mm)
minimum inside diameter
1/2 (12.7 mm)
minimum inside diameter
1/2 (12.7 mm)
minimum inside diameter
Installation Section 2
WATER/DRAIN CONNECTIONS
A. Potable Water Inlet
B. Drain
C. Condenser Water Inlet - (Water-cooled Only)
D. Condenser Water Outlet - (Water-cooled Only)
C
A
D
B
Ice Thickness Adjustment
The ice thickness can be adjusted to three levels.
1. Pull forward on the bottom of the bracket until clear of
the tab.
2. Slide the bracket over the desired tab and release.
• The center position is the normal factory setting.
• To increase bridge thickness, raise the water level.
• To decrease bridge thickness, lower the water level.
Thicker Bridge
Thinner Bridge
Before Starting the Ice Machine
All Manitowoc ice machines are factory-operated and,
normally, new installations do not require any adjustment.
Starting the ice machine and completing the Operational
Checks are the responsibilities of the owner and operator.
Adjustments and maintenance procedures outlined in this
manual are not covered by the warranty.
INSTALLATION CHECKLIST
√ Checklist Item
Has the ice machine been installed where ambient
temperatures will remain in the range of 40° – 110°F
(4° – 43°C)?
Has the ice machine been installed where the
incoming water temperature will remain in the range
of 40° – 90°F (4° – 32°C)?
Has all of the internal packing been removed?
Is there proper clearance around the ice machine for
air circulation?
Is the ice machine level?
Are all electrical leads free from contact with
refrigeration lines and moving equipment?
Has the supply voltage been tested and checked
against the rating on the nameplate?
Are all electrical and water connections complete?
Is the ice machine grounded and polarity correct?
Is there a separate drain for the water-cooled
condenser?
Is there a separate vented drain for the bin?
Has the On/Off button been pressed?
Has the owner/operator completed the warranty
registration card?
Has the owner/operator been instructed regarding
maintenance and the use of Manitowoc Cleaner and
Sanitizer?
Has the ice machine and bin been sanitized?
Factory Default Location
Model
U140 0.13 - 1.36 lbs 513 - 617 grams
U190 2.26 - 2.93 lbs 1025 - 1329 grams
U240 2.26 - 2.93 lbs 1025 - 1329 grams
U310 2.26 - 2.93 lbs 1025 - 1329 grams
Total ice weight from one cycle
Minimum - Maximum Minimum - Maximum
12 Part Number: 04002909 Rev02 4/16
Section 3
Operation
Touch Pad Features
The touch pad offers a series of pressure sensitive buttons
to control ice machine operation and provide operational
status.
On/Off - Blue = Machine Is On
Off = Machine Is Off
Delay - Blue = Delay Mode Is On
Off = Delay Mode Is Off
Clean - Yellow = Clean Cycle Is On
Off = Cleaning Is Off
Flashing = Cleaning Is Paused
Bin Full - Blue = Bin Is Full
Off = Bin Is Not Full
Service - Red = Safety Limit
Off = Doesn’t Need Service
ON/OFF
The On/Off Button is used to start and stop ice making. The
blue light indicates whether the ice machine is Ice Making
(light on) or Off (light off).
NOTE: If ice is on the evaporator (during the freeze or
harvest cycle) and the On/Off button is pressed, the next
cycle will have a thick slab of ice. Press the On/Off button
and allow the ice to melt off the evaporator, then start a
new freeze cycle.
DELAY
Pressing the Delay button will start a delay period. The ice
machine will finish the freeze and harvest cycle and then
start the delay period.
• Pressing the button once will start a 4 hour delay period.
• Pressing the button twice will start a 12 hour delay
period.
• Pressing the button three times will start a 24 hour
delay period.
• Pressing the button four times will cancel the delay
periods.
NOTE: The delay period will be canceled if power is
interrupted to the ice machine. When power is restored, the
ice machine will remain Off.
CLEAN
Pressing the Clean button for 3 seconds with the machine
off will start a clean cycle. After the clean cycle is complete,
the ice machine will automatically start an ice making cycle.
• Pressing the Clean button again within 45 seconds of
the clean cycle starting will abort the clean cycle.
• Pressing the On/Off button anytime during the clean
cycle will de-energize the On/Off LED and the ice
machine will stop after the clean cycle is complete.
• Pressing the Clean button will pause the clean cycle.
The On/Off and Clean lights will flash on/off to indicate
pause mode. Pressing the Clean button again will
continue the clean cycle from the point of interruption.
NOTE: Opening the ice damper for 30 seconds will cancel
the clean cycle.
BIN FULL
The Bin Full light energizes when the bin is full or is deenergized if the bin is not full.
SERVICE
The Service light indicates the machine needs attention.
Refer to Section 5 for more information if this light is
energized.
Part Number: 04002909 Rev02 4/16 13
Operation Section 3
Ice Making Sequence of Operation
NOTE: The On/Off button must be depressed and the ice
damper must be closed before the ice machine will start.
Water Purge Cycle
The ice machine purges any remaining water from the
water trough down the drain.
Freeze Cycle
Prechill - The refrigeration system chills the evaporator
before water flow over the evaporator starts. The water inlet
valve energizes during the pre-chill and remains on until
the ice thickness float switch is satisfied.
Freeze - Water flowing across the evaporator cools as the
freeze cycle progresses. When the water temperature
reaches setpoint, the water pump will de-energize for 25
seconds, then restart. Water flowing across the evaporator
will start to freeze and build ice on the evaporator. After a
sheet of ice has formed, the harvest float switch signals the
control board to start a harvest cycle.
Harvest Cycle
Any remaining water is purged down the drain as
refrigerant gas warms the evaporator. When the evaporator
warms, the sheet of cubes slides off the evaporator and into
the storage bin. If all cubes fall clear of the ice damper, the
ice machine starts another freeze cycle.
Full Bin Cycle
If the ice damper is held open by ice cubes, the ice machine
shuts off. When the ice damper closes, the ice machine
starts a new cycle at the water purge.
Control Board Timers
The control board has the following non-adjustable timers:
• The ice machine is locked into the freeze cycle for 6
minutes before a harvest cycle can be initiated.
• The maximum freeze time is 45 minutes, at which time
the control board automatically initiates a harvest
sequence.
• The maximum harvest time is 7 minutes. When harvest
is complete the control board automatically initiates a
freeze sequence.
• If the ice damper does not open and close within
the 7 minute harvest cycle, the ice machine enters
a water thaw cycle for 170 seconds. If the damper
does not open and close within the 170 second thaw
cycle, a second thaw cycle starts. The control board
automatically initiates a freeze sequence when the thaw
cycle(s) is complete.
SAFETY LIMITS
Safety limits are stored and indicated by the control board.
The number of cycles required to stop the ice machine
varies for each safety limit.
Safety limits can be reset by pressing the On/Off button and
starting a new ice making cycle.
A safety limit is indicated by an energized Service Light on
the touch pad. Refer to Section 5 if you receive a safety limit
indication.
• Safety Limit 1 - If the freeze time reaches 45 minutes,
the control board automatically initiates a harvest cycle.
After 6 consecutive 45-minute freeze cycles occur, the
ice machine stops.
• Safety Limit 2 - If the harvest time reaches 3.5 minutes,
the control board automatically energizes the water
pump and extends the harvest cycle another 3.5
minutes (7 minutes total). If the ice damper does not
open and close within the 7 minute harvest cycle, the
ice machine enters a water thaw cycle for 170 seconds.
If the damper does not open and close within the
170second thaw cycle, a second thaw cycle starts. The
control board automatically initiates a freeze sequence
when the thaw cycle(s) is complete. If 3 consecutive
7minute harvest and thaw cycles occur, the ice machine
stops.
• Safety Limit 3 - If the freeze time reaches 4 minutes
and water is not sensed, the ice machine stops and
initiates a 30 minute delay period. The ice machine will
automatically restart at the end of the 30 minute delay
period. If 100 consecutive failures occur, the ice machine
stops.
14 Part Number: 04002909 Rev02 4/16
Section 4
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.
Caution
,
Use only Manitowoc approved Ice Machine Cleaner and
Sanitizer. Using a non Manitowoc cleaner or sanitizer
may result in bodily harm and/or cause damage to the
ice machine that is not covered under the warranty.
Do not use cleaner or sanitizer quantities that exceed
the amounts listed in this manual. Do not use these
solutions in a manner inconsistent with their labeling.
Read and understand all labels printed on bottles before
use.
Cleaning and Sanitizing Procedures
Step 1 Press the On/Off button after ice falls from the
evaporator at the end of a harvest cycle. Or, press the On/
Off button and allow the ice to melt off the evaporator.
Step 2 Remove all ice from the bin.
Step 3 To start a cleaning cycle, press the Clean button.
Water will flow through the water dump valve and down
the drain. Wait until the water trough refills, then add the
proper amount of ice machine cleaner to the water trough.
Model Amount of Cleaner
U0140 2 ounces (60 ml)
U0190 5 ounces (150 ml)
U0240 5 ounces (150 ml)
U0310 5 ounces (150 ml)
Wait until the clean cycle is complete (approximately
22minutes) then press the On/Off button and disconnect
power and water supplies to the ice machine.
Step 4 Remove parts for cleaning.
Refer to the proper parts removal for your machine.
Continue with step 6 when the parts have been removed.
Ice machine cleaner is used to remove lime scale and
mineral deposits. Ice machine sanitizer disinfects and
removes algae and slime.
Control Operation
Pressing and holding the Clean button for 3 seconds starts
the clean cycle. The Clean and On/Off lights energize
indicating the clean cycle has started and ice making will
automatically start when the clean cycle is complete.
• Setting the ice machine to stop after the clean cycle:
Press the On/Off button. The On/Off light will deenergize, indicating the ice machine will stop after the
clean cycle.
• Pausing the cleaning cycle: Press the Clean button.
The clean light will flash indicating the clean cycle has
paused. Pressing the Clean button again will restart the
clean cycle.
NOTE: If the ice damper is open for 2 seconds, the clean
cycle will pause. If the damper is open for 30 seconds, the
clean cycle will be canceled.
Part Number: 04002909 Rev02 4/16 15
Maintenance Section 4
Step 5 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)
Caution
,
16 oz (500 ml)
cleaner
Do not immerse electrical connectors or motors for any
components in water, cleaner, or sanitizer solutions.
Use half of the cleaner and 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 6 While components are soaking, use half of the
cleaner and 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:
Step 8 Use half of the sanitizer and water solution to
sanitize all foodzone surfaces of the ice machine and bin.
Use a spray bottle 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 9 Apply food grade lubricant to all o-rings, then
replace all removed components. Wait 10 minutes and then
reapply power and water to the ice machine
Step 10 Press the Clean button. Water will flow through
the water dump valve and down the drain. Wait until the
water trough refills, then add the proper amount of ice
machine sanitizer to the water trough.
Model Amount of Sanitizer
U0140 1 ounce (30 ml)
U0190 2 ounces (60 ml)
U0240 2 ounces (60 ml)
U0310 2 ounces (60 ml)
Wait until the sanitize cycle is complete (approximately 22
minutes) then press the Ice button to start ice making.
• Evaporator plastic parts – including top, bottom, and
sides
• Bin bottom, sides, and top
Rinse all areas thoroughly with clean water.
Step 7 Mix a solution of sanitizer and warm water.
Solution Type Water Mixed With
Sanitizer 3 gal. (12 l) 2 oz (60 ml) sanitizer
Use half of the sanitizer and water solution to sanitize all
removed components. Use a spray bottle to liberally apply
the solution to all surfaces of the removed parts or soak the
removed parts in the sanitizer and water solution. Do not
rinse parts after sanitizing.
16 Part Number: 04002909 Rev02 4/16
Section 4 Maintenance
REMOVE PARTS FOR CLEANING
A. Remove the ice thickness and harvest float switch.
Pull forward on the bottom of the bracket until clear of the
tab, then slide bracket upward to remove the bracket and
float switch as an assembly.
NOTE: At this point, the component can easily be cleaned.
If complete removal is desired, follow the wires to the
bulkhead grommet (exit point) in the back wall. Pull the
wire connector through the bulkhead grommet, then
disconnect the wire leads from the connector.
Important
Reversing the mounting location of the ice thickness and
the harvest floats will result in a safety limit 2 failure.
• The ice thickness float must be mounted to the front of
the water trough and the electrical connection must be
in the top bulkhead grommet.
• The harvest float must be mounted to the side of the
water trough and the electrical connection must be in
the bottom bulkhead grommet.
• The wire connectors for each float are different and will
not allow incorrect electrical bulkhead connection.
Wire Connectors Are Located Behind Bulkhead,
Pull Through Grommet To Disconnect
Thumbscrew & Thermistor Bracket
B. Remove water trough thermistor and water trough.
• While supporting the water trough, remove the upper
thumbscrew and lift off the thermistor.
• Continue supporting the water trough and remove the
thumbscrew from beneath the water trough.
• Remove the water trough from the bin area.
NOTE: At this point, the thermistor can easily be cleaned.
If complete removal is desired, follow the wires to the
bulkhead grommet (exit point) in the back wall. Pull the
wire connector through the bulkhead grommet, then
disconnect the wire leads from the connector.
Lower Thumbscrew
Harvest Float Switch & Bracket Ice Thickness Float Switch & Bracket
C. Remove the ice damper and water distribution
tube.
• Remove thumbscrew from bin switch cover.
• Support ice damper and then pull bin switch cover and
ice damper forward to remove.
• Remove thumbscrews from the water distribution tube,
then remove.
Remove Thumbscrews From Distribution Tube and Remove
Remove Thumbscrew From Bin Switch Cover,
Support The Damper, and Remove
Part Number: 04002909 Rev02 4/16 17
Maintenance Section 4
PREVENTATIVE MAINTENANCE CLEANING
This cleaning procedure can be performed between the biannual cleaning and sanitizing cycles. This procedure does
not require removing the ice from the bin.
Step 1 Press the On/Off button after ice falls from the
evaporator at the end of a Harvest cycle. Or, press the On/
Off button and allow the ice to melt off the evaporator.
Caution
,
Never use anything to force ice from the evaporator.
Damage may result.
Step 2 To start a cleaning cycle, press the Clean button.
Water will flow through the water dump valve and down
the drain. Wait until the water trough refills, then add the
proper amount of ice machine cleaner to the water trough.
Model Amount of Cleaner
U0140 2 ounce (60 ml)
U0190 5 ounces (150 ml)
U0240 5 ounces (150 ml)
U0310 5 ounces (150 ml)
Wait until the clean cycle is complete (approximately 22
minutes) then press the On/Off button.
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.
CLEANING THE 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.
• Shine a flashlight through the condenser to check for
dirt between the fins.
• Blow compressed air from the inside out (opposite
direction of airflow).
• If dirt still remains, call a service agent to clean the
condenser.
Removal from Service/Winterization
Step 1 Clean and sanitize the ice machine.
Step 2 Press the On/Off button to turn off the ice
machine.
Step 3 Turn off the water supply, disconnect and drain
the incoming ice-making water line at the rear of the ice
machine, and drain the water trough.
Step 4 Energize the ice machine, wait one minute for the
water inlet valve to open, and blow compressed air in both
the incoming water and the drain openings in the rear of
the ice machine to remove all water.
Step 5 Press the On/Off button and disconnect the
electric power at the circuit breaker or the electric service
switch.
Step 6 Fill spray bottle with sanitizer and spray all interior
food zone surfaces. Do not rinse and allow to air dry.
Step 7 Replace all panels.
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.
Clean up any fallen ice or water spills as they occur.
18 Part Number: 04002909 Rev02 4/16
Section 5
Troubleshooting
Checklist
If a problem arises during operation of your ice machine, follow the checklist below before calling service. Routine
adjustments and maintenance procedures are not covered by the warranty.
Problem Possible Cause To Correct
No electrical power to the ice machine. Replace the fuse/reset the breaker/turn
on the main switch/plug power cord into
Ice machine does not operate.
Ice machine stops, and can be restarted by
turning the ice machine OFF and then ON.
Ice sheet is thick.
Ice machine does not release ice or is slow to
harvest.
Ice machine does not cycle into harvest
mode.
Ice quality is poor (soft or not clear).
Ice machine produces shallow or incomplete
cubes, or the ice fill pattern on the
evaporator is incomplete.
Ice machine needs to be turned on. Press the On/Off button to start ice making.
Damper in open position (down). Damper must be in upright position and
Safety limit feature stopping the ice
machine.
Water trough level is too high. Adjust ice thickness float.
Power button was turned off/on during
freeze cycle and ice remained on evaporator.
Ice damper was opened then closed in the
harvest cycle before the ice released.
Long harvest cycles with repeated safety
limit indication.
Ice machine is dirty. Clean and sanitize the ice machine.
Ice machine is not level. Level the ice machine.
Low air temperature around ice machine
(air-cooled models).
Water regulating valve leaks in harvest mode
(water-cooled models).
The six-minute freeze time lock-in has not
expired yet.
Harvest float switch is dirty. Clean and sanitize the ice machine.
Harvest float switch wire is disconnected. Connect the wire.
Harvest float switch is out of adjustment. Adjust the harvest float switch.
Uneven ice fill (thin at top of evaporator). See “Shallow or Incomplete Cubes” below.
Poor incoming water quality. Contact a qualified service company to test
Water filtration is poor. Replace the filter.
Ice machine is dirty. Clean and sanitize the ice machine.
Water softener is working improperly (if
applicable).
Ice thickness switch is out of adjustment. Adjust the ice thickness switch.
Water trough level is too high or too low. Check the water level.
Water filtration is poor. Replace the filter.
Hot incoming water. Connect the ice machine to a cold water
Incorrect incoming water pressure. Water pressure must be 20 – 80 psi (137.9 –
Ice machine is not level. Level the ice machine.
Refer to “Safety Limit Feature” on the next
Allow ice to thaw and release from
Allow ice to thaw and release from
Air temperature must be at least 40°F (4°C).
Replace water regulating valve.
Wait for freeze lock-in to expire.
the quality of the incoming water and make
appropriate filter recommendations.
receptacle.
capable of swinging freely.
page.
evaporator, then restart.
evaporator, then restart.
Call for service.
Repair the water softener.
supply.
551.5 kPa)
Part Number: 04002909 Rev02 4/16 19
Troubleshooting Section 5
Problem Possible Cause To Correct
The condenser is dirty. Clean the condenser.
Low ice capacity.
High air temperature around ice machine
(air-cooled models).
Inadequate clearance around the ice
machine.
Objects stacked around ice machine,
blocking airflow to condenser (air-cooled
models)
Hot incoming water. Connect the ice machine to a cold water
Incorrect incoming water pressure.
Water pressure is too low or water filter is
restricted.
Air temperature must not exceed 110°F
(43°C).
Provide adequate clearance.
Remove items blocking airflow.
supply.
Water pressure must be 20 – 80 psi (137.9 –
551.5 kPa). Refer to section 2 for plumbing
requirements. Replace water filter.
Safety Limit Feature
In addition to the standard safety controls, such as the high
pressure cutout, your Manitowoc ice machine features builtin safety limits, which 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. Press the On/Off button and turn off the ice machine,
then press the On/Off button again to start the ice
machine.
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 recurring.
A. If the ice machine stops again, the condition has
recurred. Call for service.
B. If the ice machine continues to run, the condition
has corrected itself. Allow the ice machine to
continue running.
20 Part Number: 04002909 Rev02 4/16
MANITOWOC FOODSERVICE – ICE MACHINE DIVISION
2110 SOUTH 26TH STREET, MANITOWOC, WI 54220
800-545-5720
WWW.MANITOWOCICE.COM
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©2016 Manitowoc Foodservice except where explicitly stated otherwise. All rights reserved. Continuing product improvement may necessitate change of specications without notice.
Part Number: 04002909 Rev02 4/16
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