icetro WU-0100A User manual

Undercounter Ice Machines
Technician’s Handbook
Revision Date: 1/24/22

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

Warning
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.
• For a cord-connected appliance, the following must
be included:
• Do not unplug by pulling on cord. To unplug,
grasp the plug, not the cord.
• Unplug from outlet when not in use and before
servicing or cleaning.
• Do not operate any appliance with a damaged
cord or plug, or after the appliance malfunctions
or is dropped or damaged in any manner.
Contact the nearest authorized service
facility for examination, repair, or electrical or
mechanical adjustment

Warning
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.
• 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.

Warning
Follow these precautions to prevent personal injury
while operating or maintaining this 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.
• 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.
• 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.
• Crush/Pinch Hazard. Keep hands clear of moving
components. Components can move without
warning unless power is disconnected and all
potential energy is removed.
• Moisture collecting on the floor will create a slippery
surface. Clean up any water on the floor immediately
to prevent a slip hazard.

Warning
Follow these precautions to prevent personal injury
while operating or maintaining this equipment.
• 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.
• Units with two power cords must be plugged
into individual branch circuits. During movement,
cleaning or repair it is necessary to unplug both
power cords.

Table of Contents
8
General Information
Model Numbers
How to Read a Model Number
How to Read a Serial Number
Ice Cube Sizes
Model & Serial Number Location
Installation
Location of Ice Machine
Ice Machine Clearance Requirements
Ice Machine Heat of Rejection
Leveling the Ice Machine
Electrical Requirements
Electrical Specifications
Water Service/Drains
Water Supply
Water Inlet Line
Maintenance
Interior Cleaning & Sanitizing
Remedial Cleaning
Cleaning the Condenser
Removal from Service/Winterization
Bin Removal
Detailed Descaling and Sanitizing Procedure
WU-0100
Cleaning The Condenser
Removal from Service/Winterization
..............................................................14
...............................15
................................16
.....................17
.............................................18
.................19
...............................19
........................................20
................................................................17
...........................................21
...........................................21
................................................22
.........................................................22
...................................................22
Drain Connections ...............................................23
Water Supply & Drain Line
Sizing/Connections ...................................................24
.............................25
Detailed Cleaning & Sanitizing
Procedure IC/IU-0170 & IC/IU-0220 .................25
..............................................26
..................................36
...........37
...........................................................48
.........................................................................40
..................................51
...........52

9
Operation
Sequence of Operation
IC/IU-0170 & IC/IU-0220
Sequence of Operation
Error Codes
Operational Checks
Ice Thickness Check
Ice Thickness Adjustment
Minimum/Maximum Slab weight
Sequence of Operation WU-0100
WU-0100 Energized Parts Chart
Operational Checks WU-0100
Siphon System
Water Level
Water Level Check
Ice Thickness Check
...........................................53
Main Power Switch ...............................................53
........................................55
.............................................................61
Troubleshooting Error Codes ...........................63
.......................................................65
..............................................65
...................................65
....................67
.......................68
.......................70
..............................72
....................................................72
............................................................72
.................................................73
.............................................74
Troubleshooting
Ice Machine Cycles Into Harvest Before the
Harvest Float is down/closed
Ice Production Check
Installation/Visual Inspection Checklist
Water System Checklist
Ice Formation Pattern
Troubleshooting IC/IU-0170 & IC/IU-0220 ........75
Control Board (IC/IU-0170 & IC/IU-0220).......77
Diagnosing an Ice Machine
that Will Not Run .................................................80
Ice Machine Does Not Cycle Into Harvest when
the Harvest Float is down/closed ..............81
Ice Machine Does Not Cycle Into Harvest when
Water Touches Ice Thickness Probe..................82
..............................83
............................................85
......87
.......................................87
..........................................89

10
Analyzing Discharge Pressure
Analyzing Suction Pressure
Hot Gas Valve
Discharge Line Temperature Analysis
Final Analysis
.......................91
...........................93
.....................................................96
........100
.....................................................102
Troubleshooting WU-0100
Diagnosing An Ice Machine That
Will Not Run
Error Codes
....................................103
..........................................................103
..........................................................104
Error Code Checklist ...........................................105
Diagnosing Ice Thickness Control Circuitry 108
Ice Production Check ..........................................110
Installation/Visual Inspection Checklist ........112
Water System Checklist.......................................113
WU-0100 Refrigeration Diagnostics ..................115
Analyzing Discharge Line Temperature ......116
Analyzing Suction Line Temperature ..........117
Hot Gas Valve .........................................................119

11
Component Check Procedures
Main Fuse
Bin Switch All Models
Float Switch
IC/IU-0170 & IC/IU-0220
Water Trough Thermistor
IC/IU-0170 & IC/IU-0220
ICE/OFF/WASH Toggle Switch
All Models
Compressor Electrical Diagnostics
High Pressure Cutout (HPCO) Control
IC/IU-0170 & IC/IU-0220
................................................................123
......................................124
....................................126
.....................................128
.............................................................129
..................130
....................................132
Filter-Driers
Refrigerant Recovery/Evacuation
Refrigerant Re-use Policy
Recovery and Recharging Procedures
IC/U-0170 & IC/IU-0220
Recovery and Recharging Procedures
WU-0100
System Contamination Cleanup
Mild System Contamination Cleanup
Severe System Contamination Cleanup
Replacing Pressure Controls Without
Removing Refrigerant Charge
Total System Refrigerant Charge
................................................................133
.......................134
...............................135
......................................137
................................................................140
...........144
........145
..........................147
..........................148

12
Charts
Cycle Times, 24 Hr. Ice Production and
Refrigerant Pressure Charts
WU-0100
IC/ID-0170 & IC/ID-0220
................................149
..............................................................150
..................................151
Diagrams
Wiring Diagrams
WU-0100 Wiring Diagram
IU-0170 & IU-0220 Wiring Diagram
Printed Circuit Boards (PCB)
WU-0100 PCB
Tubing Schematics
Tubing Schematic - WU-0100
Tubing Schematic
IC/IU-0170 & IC/IU-0220
.......................................................152
................................153
................154
.......................................................155
...........156
IC/IU-0170 & IC/IU-0220 PCB (Floats)
IU-0170 & IU-0220 PCB
(Ice Thickness Probe) ........................................157
.....................................................158
.......................158
...................................159

13
THIS PAGE INTENTIONALLY LEFT BLANK

14
Model Numbers
This manual covers the following models:
Self-contained
Air-cooled
Self-contained
Water-cooled
IC-0170A
–
IU-0170A
–
WU-0100A
–
General Information
Ice Machine Warranty Information
For warranty information visit:
http://www.icetroamerica.com/service-support
•Warranty Registration
•Warranty Procedure Form
•Warranty Claim Form
•Labor Allowance Form
Warranty coverage begins the day the ice machine
is installed.
IC-0220A
IU-0220A
–
–

15
I U 0220 AH
Ice Machine Series
W
I
Ice Machine Type M - Modular
C - Under Counter (Old) U - Under Counter (New) D - Dispenser
CONDENSER TYPE
A - Self-Contained Air-Cooled
W - Self-Contained Water-Cooled
R - Remote Air-Cooled
C - Dice
H - Half Dice F - Flake N - Nugget
Full Model Number
Production
Amount (lbs)
How to Read a Model Number
Cube Size

16
How to Read a Serial Number
Full Serial Number

17
Ice Cube Sizes
Dice
7/8" x 7/8" x 7/8"
2.22 x 2.22 x2.22 cm
Half Dice
3/8" x 1-1/8" x 7/8"
0.95 x 2.86 x 2.22 cm
Model/Serial Number Location
These numbers are required when requesting
information from your local Icetro Distributor, service
representative, or Icetro America.
The model and serial number are listed on the OWNER
WARRANTY REGISTRATION CARD.
They are also listed on the MODEL/SERIAL NUMBER
DECAL, which can be found behind the air grill toward
the bottom of the machine (IC/IU-0170 & IC/IU-0220),
as well as behind the machine (all models).

18
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.
• Air temperature: Must be at least 50°F (10°C) but must
not exceed 100°F (37.°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 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.
Installation

19
Ice Machine Clearance Requirements
Self-contained
Air-cooled
Self-contained
Water-cooled
Top/Sides 5" (127 mm)* 5" (127 mm)*
Back 5" (127 mm)* 5" (127 mm)*
*The ice machine may be built into a cabinet.
Ice Machine Heat of Rejection
Series
Ice Machine
Heat of Rejection*
Air Conditioning** Peak
WU-0100 1750 2600
IC-0170 2200 2600
IU-0170 2200 2600
* 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.
IC-0220 2800 3600
IU-0220 2800 3300