Manitowoc
Indigo™ Series
Air/Water/Remote Condenser
Ice Machines
Technician’s Handbook
This manual is updated as new information and models are released.
Visit our website for the latest manual. www.manitowocice.com
America’s #1 Selling Ice Machine
Part Number STH025 7/11
Safety Notices
As you work on Manitowoc 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.
Throughout this handbook, you will see the following
types of safety notices:
! Warning
Text in a Warning box alerts you to a potential
personal injury situation. Be sure to read the
Warning statement before proceeding, and work
carefully.
! Caution
Text in a Caution box alerts you to a situation in
which you could damage the equipment. Be sure
to read the Caution statement before proceeding,
and work carefully.
Procedural Notices
As you work on Manitowoc equipment, be sure to read
the procedural notices in this handbook. These notices
supply helpful information which may assist you as
you work.
Throughout this handbook, you will see the following
types of procedural notices:
Important
Text in an Important box provides you with
information that may help you perform a
procedure more efficiently. Disregarding this
information will not cause damage or injury, but it
may slow you down as you work.
NOTE: Text set off as a Note provides you with simple,
but useful, extra information about the procedure you
are performing.
Read These Before Proceeding:
! Caution
Proper installation, care and maintenance are
essential for maximum performance and troublefree operation of your Manitowoc equipment. If
you encounter problems not covered by this
handbook, do not proceed, contact Manitowoc
Foodservice. We will be happy to provide
assistance.
Important
Routine
adjustments
and
maintenance
procedures outlined in this handbook 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.
We reserve the right to make product
improvements at any time. Specifications and
design are subject to change without notice.
Table of Contents
General Information
How to Read a Model Number . . . . . . . . . 11
Head Sections . . . . . . . . . . . . . . . . . . . 11
Ice Cube Sizes . . . . . . . . . . . . . . . . . . . . . 12
Model/Serial Number Location . . . . . . . . 13
Model Numbers . . . . . . . . . . . . . . . . . . . . . 14
Air-Water-Remote Condenser Models 14
Ice Machine Warranty Information . . . . . 15
Owner Warranty Registration Card . . . 15
Commercial Warranty Coverage . . . . . 16
Residential Ice Machine Warranty . . . . 18
Installation
Ice Deflector . . . . . . . . . . . . . . . . . . . . 23
Location of Ice Machine . . . . . . . . . . . . . . 24
Clearance Requirements . . . . . . . . . . . . . 25
Air, Water, Remote Condenser Models 25
Ice Machine Heat of Rejection . . . . . . . . . 26
Installation on a Bin . . . . . . . . . . . . . . . . . 27
Ice Machine on a Dispenser Installation 27
Lineset Applications . . . . . . . . . . . . . . . . 28
Remote Condenser . . . . . . . . . . . . . . . 29
Additional Refrigerant Charge For
51’ to 100’ Line Sets . . . . . . . . . . . . . . 30
Calculating Allowable Lineset Distance 31
Component Identification
I Model Single Evaporator Models . . . . . 35
Part Number STH025 7/11
5
Maintenance
Cleaning and Sanitizing . . . . . . . . . . . . . 37
General . . . . . . . . . . . . . . . . . . . . . . . . 37
Cleaning/Sanitizing Procedure . . . . . . 39
Preventative Maintenance Cleaning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Exterior Cleaning . . . . . . . . . . . . . . . . 39
Cleaning / Sanitizing Procedure . . . . . . . 40
Cleaning Procedure . . . . . . . . . . . . . . 40
Sanitizing Procedure . . . . . . . . . . . . . 43
Parts Removal for Cleaning/Sanitizing 46
Removal from Service/Winterization . . . 52
Air-Cooled Ice Machines . . . . . . . . . . 52
Water-Cooled Ice Machines . . . . . . . . 53
Operation
Control Panel Features . . . . . . . . . . . . . .
Buttons . . . . . . . . . . . . . . . . . . . . . . . .
Display Panel . . . . . . . . . . . . . . . . . . .
Menu Navigation Overview . . . . . . . . . . .
Display Panel Navigation . . . . . . . . . . . .
Alerts and Messages . . . . . . . . . . . . . . . .
Main Menu . . . . . . . . . . . . . . . . . . . . . . . .
Machine Info Menu . . . . . . . . . . . . . . . . .
Password Entry . . . . . . . . . . . . . . . . . . . .
Reset Password To Factory Defaults .
6
57
57
58
59
60
62
63
64
65
67
Part Number STH025 7/11
Set-Up Menu . . . . . . . . . . . . . . . . . . . . . . . 68
Language . . . . . . . . . . . . . . . . . . . . . . 68
Time & Date . . . . . . . . . . . . . . . . . . . . 68
Time Configuration . . . . . . . . . . . . . . . 70
Units . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Ice Clarity . . . . . . . . . . . . . . . . . . . . . . 71
LCD Brightness . . . . . . . . . . . . . . . . . . 71
Password On . . . . . . . . . . . . . . . . . . . . 72
Edit password . . . . . . . . . . . . . . . . . . . 72
Clean Minder . . . . . . . . . . . . . . . . . . . . 72
IAuCS Runtime . . . . . . . . . . . . . . . . . . 73
Air Filter . . . . . . . . . . . . . . . . . . . . . . . . 73
Water Filter . . . . . . . . . . . . . . . . . . . . . 74
LuminIce™ reminder . . . . . . . . . . . . . . 74
USB Setup . . . . . . . . . . . . . . . . . . . . . 75
Factory Defaults . . . . . . . . . . . . . . . . . 75
Energy Saver Menu . . . . . . . . . . . . . . . . . 76
Ice Program . . . . . . . . . . . . . . . . . . . . . 77
Water Miser . . . . . . . . . . . . . . . . . . . . . 78
Statistics . . . . . . . . . . . . . . . . . . . . . . . 78
Service Menu . . . . . . . . . . . . . . . . . . . . . . 79
Data History . . . . . . . . . . . . . . . . . . . . 80
Real Time Data . . . . . . . . . . . . . . . . . . 81
Diagnostics . . . . . . . . . . . . . . . . . . . . . 83
Manual Harvest . . . . . . . . . . . . . . . . . . 84
Replace Control Board . . . . . . . . . . . . 84
USB Setup . . . . . . . . . . . . . . . . . . . . . 84
Event Log Menu . . . . . . . . . . . . . . . . . 85
Event Log . . . . . . . . . . . . . . . . . . . . . . 86
USB Flash Drive Specifications and Formatting . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Upgrading Firmware with a Flash Drive or
Transferring Setup Data To Multiple Machines . . . . . . . . . . . . . . . . . . . . . . . . . 92
Exporting Data to a Flash Drive . . . . . 94
Safe Operation Mode . . . . . . . . . . . . . 95
Part Number STH025 7/11
7
Operational Checks . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . .
Ice Thickness Check . . . . . . . . . . . . .
Sequence of Operation . . . . . . . . . . . . . .
Self Contained Air or Water Cooled . .
Remote Condenser . . . . . . . . . . . . . .
96
96
97
98
98
103
Troubleshooting
Safety Limits . . . . . . . . . . . . . . . . . . . . . . 109
Analyzing Why a Safety Limit Stopped the
Ice Machine . . . . . . . . . . . . . . . . . . . . 110
Safety Limit #1 . . . . . . . . . . . . . . . . . . 111
Safety Limit #2 . . . . . . . . . . . . . . . . . . 112
Troubleshooting By Symptom . . . . . . . . 115
Symptom #1 Ice Machine will not run . 117
Symptom #2 - Self-contained Air, Water &
Remote Condenser Models . . . . . . . . 123
Symptom #2 - Freeze Cycle Refrigeration
System Operational Analysis Tables . 125
Symptom #3 Harvest Problems
Self-contained Air, Water & Remote Condenser Models . . . . . . . . . . . . . . . . . . 148
Symptom #3 Self-Contained Air or Watercooled . . . . . . . . . . . . . . . . . . . . . . . . . 149
Symptom #3 - Remote Condenser . . . 151
Symptom #4 Self-Contained Air, Watercooled or Remote . . . . . . . . . . . . . . . . 153
8
Part Number STH025 7/11
Component Check Procedures
Electrical Components . . . . . . . . . . . . . . . 157
Control Board, Display board and Touch
Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Control Board Relay Test . . . . . . . . . . 160
USB Flash Drive Specifications and Formatting . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Upgrading Firmware with a Flash Drive or
Transferring Setup Data To Multiple Machines . . . . . . . . . . . . . . . . . . . . . . . . . 163
Exporting Data to a Flash Drive . . . . . 165
Main Fuse . . . . . . . . . . . . . . . . . . . . . . 167
Bin Switch . . . . . . . . . . . . . . . . . . . . . . 168
Water Level Control Circuitry . . . . . . . 171
Ice Thickness Probe (Harvest Initiation)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
High Pressure Cutout (HPCO) Control 179
Fan Cycle Control . . . . . . . . . . . . . . . . 182
Thermistors . . . . . . . . . . . . . . . . . . . . . 183
Harvest Assist Air Pump . . . . . . . . . . . 187
Compressor Electrical Diagnostics . . . 188
Diagnosing Start Components . . . . . . 190
Refrigeration Components . . . . . . . . . . . 195
Head Pressure Control Valve . . . . . . . 195
Harvest Pressure Regulating (HPR) System
Remote Condenser Only . . . . . . . . . . . 199
Water Regulating Valve . . . . . . . . . . . 202
Refrigerant Recovery/Evacuation . . . . . . 204
Self-Contained Model Procedure . . . . 204
Remote Condenser Model Procedure . 208
System Contamination Clean-Up . . . . . . 214
Determining Severity Of Contamination 214
Cleanup Procedure . . . . . . . . . . . . . . . 216
Replacing Pressure Controls Without Removing Refrigerant Charge . . . . . . . . . 219
Liquid Line Filter-Driers . . . . . . . . . . . . 221
Total System Refrigerant Charge . . . . 222
Part Number STH025 7/11
9
Charts
Cycle Times/24-Hour Ice Production/
Refrigerant Pressure Charts . . . . . . . . . .
I0300 Series . . . . . . . . . . . . . . . . . . . .
I0320 Series . . . . . . . . . . . . . . . . . . . .
I0450 Series . . . . . . . . . . . . . . . . . . . .
I0500 Series . . . . . . . . . . . . . . . . . . . .
I0520 Series . . . . . . . . . . . . . . . . . . . .
I0600 Series . . . . . . . . . . . . . . . . . . . .
I0850 Series . . . . . . . . . . . . . . . . . . . .
I1000 Series . . . . . . . . . . . . . . . . . . . .
I1200 Series . . . . . . . . . . . . . . . . . . . .
225
226
228
230
232
235
237
240
243
246
Diagrams
Wiring Diagrams . . . . . . . . . . . . . . . . . . .
Wiring Diagram Legend . . . . . . . . . . .
I0300/I0450/I0500/I0520 . . . . . . . . . .
I0320 . . . . . . . . . . . . . . . . . . . . . . . . .
I0500 . . . . . . . . . . . . . . . . . . . . . . . . .
I0600/I0850/I1000/I1200 . . . . . . . . . .
I0600/I0850/I1000 . . . . . . . . . . . . . . .
I1400/I1800 . . . . . . . . . . . . . . . . . . . .
I1400/I1800 . . . . . . . . . . . . . . . . . . . .
Electronic Control Board . . . . . . . . . . . .
Refrigeration Tubing Schematics . . . . .
Self-Contained Air or Water -Cooled .
Remote Condenser Models . . . . . . . .
249
249
250
251
252
253
254
255
256
257
258
258
259
10
Part Number STH025 7/11
Part Number STH025 7/11
Ice Machine Series
ICE MACHINE MODEL
I - Indigo Model
IB - Ice Beverage
ICE CUBE SIZE
R - Regular
D - Dice
Y - Half-Dice
Not Used On IB Models
# HERTZ
5 - 50HZ
6 - 60HZ
CONDENSER TYPE
A - Self-Contained Air -Cooled
W - Self-Contained Water -Cooled
N - Remote Air-Cooled
C - CVD Air-Cooled
DC - IB Dice Model
3 - Three Phase
YC - IB Half Dice
E - WRAS 50 Cycle Only
NO INDICATOR - 1 Phase
0 to 6 & 8 - Self-Contained Unit
7 & 8 - CVD Remote Condensing Unit
9 - Remote Air-Cooled Condenser
OR
9 - Ice Beverage Remote Condensing Unit
VOLTAGE
161 - 115/60/1
261 - 208-230 /60/1
251 - 230/50/1
263 - 208-230 /60/3
463 - 460/60/3
HP - High Pressure Water
Regulating Valve
X - LuminIce
P - Correctional Model
M - Marine Model
I Y 0855 W3 – 263PHPX
# CUBE SIZE CONDENSER TYPE
0 - Regular
Air-Cooled
1 - Regular
Water-Cooled
2 - Dice Air-Cooled
3 - Dice
Water-Cooled
4 - Half-Dice Air-Cooled
5 - Half-Dice Water-Cooled
General Information
How to Read a Model Number
HEAD SECTIONS
11
Ice Cube Sizes
Regular
Dice
Half Dice
1-1/8" x 1-1/8" x 7/8"
7/8" x 7/8" x 7/8"
3/8" x 1-1/8" x 7/8"
2.86 x 2.86 x 2.22 cm 2.22 x 2.22 x2.22 cm 0.95 x 2.86 x 2.22 cm
! Warning
Personal Injury Potential - 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.
! Warning
All Manitowoc ice machines require the ice
storage system (bin, dispenser, etc.) to
incorporate an ice deflector.
Prior to using a non-Manitowoc ice storage
system with other Manitowoc ice machines,
contact the manufacturer to assure their ice
deflector is compatible with Manitowoc ice
machines.
12
Part Number STH025 7/11
Model/Serial Number Location
These numbers are required when requesting
information from your local Manitowoc Distributor,
service representative, or Manitowoc Ice. The model
and serial number are listed on the OWNER
WARRANTY REGISTRATION CARD. They are also
listed on the MODEL/SERIAL NUMBER DECAL
affixed to the front and rear of the ice machine.
Part Number STH025 7/11
13
Model Numbers
AIR-WATER-REMOTE CONDENSER MODELS
Self-Contained
Air-Cooled
Self-Contained
Water-Cooled
ID0302A
IY0304A
ID0303W
IY0305W
----
ID0322A
IY0324A
ID0323W
IY0325W
----
IR0520A
ID0522A
IY0524A
IR0421W
ID0423W
IY0425W
-------
ID0452A
IY0454A
ID0453W
IY0455W
----
IR0500A
ID0502A
IY0504A
IR0501W
ID0503W
IY0505W
IR0590N
ID0592N
IY0594N
ID0602A
IY0604A
ID0603W
IY0605W
ID0692N
IY0694N
IR0850A
ID0852A
IY0854A
IR0851W
ID0853W
IY0855W
IR0890N
ID0892N
IY0894N
ID1002A
IY1004A
ID1003W
IY1005W
ID1092N
IY1094N
ID1202A
IY1204A
ID1203W
IY1205W
---
ID1402A
IY1404A
ID1403W
IY1405W
ID1492N
IY1494N
IR1800A
ID1802A
IY1804A
IR1801W
ID1803W
IY1805W
IR1890N
ID1892N
IY1894N
Remote
NOTE: Marine and Prison models have a M or P suffix -
Example ID0853WM
3 suffix at the end of the model number indicates a 3 phase
unit - Example IY1004A3
14
Part Number STH025 7/11
Ice Machine Warranty Information
OWNER WARRANTY REGISTRATION CARD
Warranty coverage begins the day the ice machine is
installed.
Important
Complete and mail the OWNER WARRANTY
REGISTRATION CARD as soon as possible to
validate the installation date.
If the OWNER WARRANTY REGISTRATION CARD is
not returned, Manitowoc will use the born on date
recorded in the control board or the date of sale to the
Manitowoc Distributor as the first day of warranty
coverage for your new ice machine.
Part Number STH025 7/11
15
COMMERCIAL WARRANTY COVERAGE
Manitowoc Ice, (hereinafter referred to as the
"COMPANY") warrants for a period of thirty-six months
from the installation date (except as limited below) that
new ice machines manufactured by the COMPANY
shall be free of defects in material or workmanship
under normal and proper use and maintenance as
specified by the COMPANY and upon proper
installation and start-up in accordance with the
instruction manual supplied with the ice machine.
The COMPANY'S warranty hereunder with respect to
the compressor shall apply for an additional twentyfour months, excluding all labor charges, and with
respect to the evaporator for an additional twenty-four
months, including labor charges.
The obligation of the COMPANY under this warranty is
limited to the repair or replacement of parts,
components, or assemblies that in the opinion of the
COMPANY are defective. This warranty is further
limited to the cost of parts, components or assemblies
and standard straight time labor charges at the
servicing location. Time and hourly rate schedules, as
published from time to time by the COMPANY, apply to
all service procedures.
Additional expenses including without limitation, travel
time, overtime premium, material cost, accessing or
removal of the ice machine, or shipping are the
responsibility of the owner, along with all maintenance,
adjustments, cleaning, and ice purchases.
Labor covered under this warranty must be performed
by a COMPANY Contracted Service Representative or
a refrigeration service agency as qualified and
authorized by the COMPANY'S local Distributor.
The COMPANY'S liability under this warranty shall in
no event be greater than the actual purchase price
paid by customer for the ice machine.
16
Part Number STH025 7/11
The foregoing warranty shall not apply to (1) any part
or assembly that has been altered, modified, or
changed; (2) any part or assembly that has been
subjected to misuse, abuse, neglect, or accidents; (3)
any ice machine that has been installed and/or
maintained inconsistent with the technical instructions
provided by the COMPANY; or (4) any ice machine
initially installed more than five years from the serial
number production date. This warranty shall not apply
if the Ice Machine's refrigeration system is modified
with a condenser, heat reclaim device, or parts and
assemblies other than those manufactured by the
COMPANY, unless the COMPANY approves these
modifications for specific locations in writing.
THIS WARRANTY IS IN LIEU OF ALL OTHER
WARRANTIES OR GUARANTEES OF ANY
KIND, EXPRESSED OR IMPLIED, INCLUDING ANY
IMPLIED WARRANTY OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE.
In no event shall the COMPANY be liable for any
special, indirect, incidental or consequential damages.
Upon the expiration of the warranty period, the
COMPANY'S liability under this warranty shall
terminate. The foregoing warranty shall constitute the
sole liability of the COMPANY and the exclusive
remedy of the customer or user.
To secure prompt and continuing warranty service, the
warranty registration card must be completed and sent
to the COMPANY within five (5) days from the
installation date.
To obtain warranty service or information regarding
your Product, please contact us at:
MANITOWOC ICE
2110 So. 26th St. P.O. Box 1720,
Manitowoc, WI 54221-1720
Telephone: 920-682-0161 Fax: 920-683-7585
www.manitowocice.com
Part Number STH025 7/11
17
RESIDENTIAL ICE MACHINE LIMITED WARRANTY
WHAT DOES THIS LIMITED WARRANTY COVER?
Subject to the exclusions and limitations below,
Manitowoc Ice (“Manitowoc”) warrants to the original
consumer that any new ice machine manufactured by
Manitowoc (the “Product”) shall be free of defects in
material or workmanship for the warranty period
outlined below under normal use and maintenance,
and upon proper installation and start-up in
accordance with the instruction manual supplied with
the Product.
HOW LONG DOES THIS LIMITED WARRANTY
LAST?
Product Covered
Warranty Period
Ice Machine
Twelve months from the
sale date
WHO IS COVERED BY THIS LIMITED WARRANTY?
This limited warranty only applies to the original
consumer of the Product and is not transferable.
18
Part Number STH025 7/11
WHAT ARE MANITOWOC ICE’S OBLIGATIONS
UNDER THIS LIMITED WARRANTY?
If a defect arises and Manitowoc receives a valid
warranty claim prior to the expiration of the warranty
period, Manitowoc shall, at its option: (1) repair the
Product at Manitowoc’s cost, including standard
straight time labor charges, (2) replace the Product
with one that is new or at least as functionally
equivalent as the original, or (3) refund the purchase
price for the Product. Replacement parts are
warranted for 90 days or the balance of the original
warranty period, whichever is longer. The foregoing
constitutes Manitowoc’s sole obligation and the
consumer’s exclusive remedy for any breach of this
limited warranty. Manitowoc’s liability under this limited
warranty is limited to the purchase price of Product.
Additional expenses including, without limitation,
service travel time, overtime or premium labor
charges, accessing or removing the Product, or
shipping are the responsibility of the consumer.
HOW TO OBTAIN WARRANTY SERVICE
To obtain warranty service or information regarding
your Product, please contact us at:
MANITOWOC ICE
2110 So. 26th St.
P.O. Box 1720,
Manitowoc, WI 54221-1720
Telephone: 920-682-0161 Fax: 920-683-7585
www.manitowocice.com
Part Number STH025 7/11
19
WHAT IS NOT COVERED?
This limited warranty does not cover, and you are
solely responsible for the costs of: (1) periodic or
routine maintenance, (2) repair or replacement of the
Product or parts due to normal wear and tear, (3)
defects or damage to the Product or parts resulting
from misuse, abuse, neglect, or accidents, (4) defects
or damage to the Product or parts resulting from
improper or unauthorized alterations, modifications, or
changes; and (5) defects or damage to any Product
that has not been installed and/or maintained in
accordance with the instruction manual or technical
instructions provided by Manitowoc. To the extent that
warranty exclusions are not permitted under some
state laws, these exclusions may not apply to you.
EXCEPT AS STATED IN THE FOLLOWING SENTENCE, THIS
LIMITED WARRANTY IS THE SOLE AND EXCLUSIVE
WARRANTY OF MANITOWOC WITH REGARD TO THE
PRODUCT. ALL IMPLIED WARRANTIES ARE STRICTLY
LIMITED TO THE DURATION OF THE LIMITED WARRANTY
APPLICABLE TO THE PRODUCTS AS STATED ABOVE,
INCLUDING BUT NOT LIMITED TO, ANY WARRANTY OF
MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR
PURPOSE.
Some states do not allow limitations on how long an
implied warranty lasts, so the above limitation may not
apply to you.
20
Part Number STH025 7/11
IN NO EVENT SHALL MANITOWOC OR ANY OF ITS
AFFILIATES BE LIABLE TO THE CONSUMER OR ANY
OTHER PERSON FOR ANY INCIDENTAL, CONSEQUENTIAL
OR SPECIAL DAMAGES OF ANY KIND (INCLUDING,
WITHOUT LIMITATION, LOSS OF PROFITS, REVENUE OR
BUSINESS) ARISING FROM OR IN ANY MANNER
CONNECTED WITH THE PRODUCT, ANY BREACH OF THIS
LIMITED WARRANTY, OR ANY OTHER CAUSE
WHATSOEVER, WHETHER BASED ON CONTRACT, TORT
OR ANY OTHER THEORY OF LIABILITY.
Some states do not allow the exclusion or limitation of
incidental or consequential damages, so the above
limitation or exclusion may not apply to you.
HOW STATE LAW APPLIES
This limited warranty gives you specific legal rights,
and you may also have rights that vary from state to
state or from one jurisdiction to another.
REGISTRATION CARD
To secure prompt and continuing warranty service, this
warranty registration card must be completed and sent
to Manitowoc within thirty (30) days from the sale date.
Complete the registration card and send it to
Manitowoc.
Part Number STH025 7/11
21
This Page Intentionally Left Blank
22
Part Number STH025 7/11
Installation
! Warning
PERSONAL INJURY POTENTIAL
Remove all ice machine panels before lifting.
! Caution
The ice machine head section 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” page 52.
ICE DEFLECTOR
An ice deflector is required for all ice machines
installed on a bin.
Part Number STH025 7/11
23
Location of Ice Machine
The location selected for the ice machine must meet
the following criteria. If any of these criteria are not
met, select another location.
• The location must be free of airborne and other
contaminants.
• Self contained air and water cooled - The air
temperature must be at least 35°F (1.6°C), but
must not exceed 110°F (43.4°C).
• Remote air cooled - The air temperature must be
at least -20°F (-29°C), but must not exceed 120°F
(49°C)
• Ice Making Water Inlet - Water Pressure must be
at least 20 psi (1.38 bar), but must not exceed 80
psi (5.52 bar).
• Condenser Water Inlet - Water Pressure must be
at least 20 psi (1.38 bar), but must not exceed
150 psi (10.34 bar).
• The location must not be near heat-generating
equipment or in direct sunlight and protected from
weather.
• The location must not obstruct air flow through or
around the ice machine. Refer to 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. See
“Removal from Service/Winterization”
24
Part Number STH025 7/11
Clearance Requirements
AIR, WATER, REMOTE CONDENSER MODELS
I0300
Self-Contained
Air-Cooled
Self-Contained
Water-Cooled
Top/Sides
16" (40.6 cm)
8" (20.3 cm)
Back
5" (12.7 cm)
5" (12.7 cm)
I0450
I0500 - I0600
I0850 - I1000
Self-Contained
Air-Cooled
Water-Cooled and
Remote*
Top/Sides
8" (20.3 cm)
8" (20.3 cm)
Back
5" (12.7 cm)
5" (12.7 cm)
I0320 - I0520
Self-Contained
Air-Cooled
Water-Cooled and
Remote*
Top/Sides
12" (30.5 cm)
8" (20.3 cm)
Back
5" (12.7 cm)
5" (12.7 cm)
I0520 Tropical Rating
Top
24” (61 cm)
N/A
Sides/back
12” (30.5 cm)
N/A
I1400 - I1800
Self-Contained
Air-Cooled
Top/Sides
24" (61.0 cm)
8" (20.3 cm)
Back
12" (30.5 cm)
5" (12.7 cm)*
Water-Cooled
and Remote*
* There is no minimum clearance required for water-cooled or
remote ice machines. This value is recommended for efficient
operation and servicing only.
Part Number STH025 7/11
25
Ice Machine Heat of Rejection
Series Ice
Machine
Heat of Rejection
Air
Conditioning*
Peak
I0300
4600
5450
I0320
3800
6000
I0450
5400
6300
I0500
6100
6900
I0520
5300
6100
I0600
9000
13900
I0850
13000
16000
I1000
16250
18600
I1200
20700
24500
I1400
23500
27000
I1800
30000
35000
*BTU/Hour
Because the heat of rejection varies during the ice making
cycle, the figure shown is an average.
26
Part Number STH025 7/11
Installation on a Bin
An ice deflector is required for all bin installations and
is included with all Manitowoc bins. Order the
appropriate deflector kit (30” or 48”) for any bin without
a deflector..
! Warning
PERSONAL INJURY POTENTIAL
Do not operate any ice machine with the deflector
removed.
Ice Machine on a Dispenser Installation
No deflector is needed for machines that match the
size of the dispenser (30” head section on a 30”
dispenser) unless required by the dispenser
manufacturer. Adapters are required when a smaller
ice machine is going on a larger dispenser (22”
machine on a 30” dispenser).
.
Part Number STH025 7/11
27
Lineset Applications
! Caution
The 60-month compressor warranty (including the
36-month labor replacement warranty) will not apply
if the Manitowoc Ice Machine, Condenser or
QuietQube® Condensing Unit were not installed
according to specifications. This warranty also will
not apply if the refrigeration system is modified with
a condenser, heat reclaim device, or other parts or
assemblies not manufactured by Manitowoc Ice.
! Warning
Recovery locations vary by model. Verify you are
making the correct connections for your model to
prevent accidental release of high pressure
refrigerant.
Important
Manitowoc remote systems are only approved
and warranted as a complete new package.
Warranty on the refrigeration system will be
void if new equipment is connected to preexisting (used) tubing, remote condenser,
remote condensing unit or ice machine head
section.
28
Part Number STH025 7/11
Remote Condenser
Ice Machine
Remote Single
Circuit
Condenser
I0590N
JC0495
I0690N
I0890N
JC0895
I1090N
JC0995
I1490N
I1890N
JC1395
*Line Set
RT
RL
Discharge Line
1/2" (1.27 cm)
1/2" (1.27 cm)
Line Set*
RT-20-R404A
RT-35-R404A
RT-50-R404A
RT-20-R404A
RT-35-R404A
RT-50-R404A
RT-20-R404A
RT-35-R404A
RT-50-R404A
RL-20-R404A
RL-35-R404A
RL-50-R404A
Liquid Line
5/16" (.79 cm)
3/8" (.95 cm)
Air Temperature Around the Condenser
Minimum
Maximum
-20°F (-29°C)
120°F (49°C)
Part Number STH025 7/11
29
Additional Refrigerant Charge For
51’ to 100’ Line Sets
30
Ice
Machine
Condenser
I0590N
I0690N
I0890N
I1090N
I1490N
I1890N
JC0495
JC0895
JC0895
JC0995
JC1395
JC1395
Additional Amount of
Refrigerant To Be
Added To Nameplate
Charge
1.5 lbs - 680g
1.5 lbs - 680g
2 lbs - 907g
2 lbs - 907g
2 lbs - 907g
1 lb - 454g
Part Number STH025 7/11
CALCULATING ALLOWABLE LINESET DISTANCE
Line Set Length
The maximum length is 100' (30.5 m).
Line Set Rise/Drop
The maximum rise is 35' (10.7 m).
The maximum drop is 15' (4.5 m).
35 FT. (10.7 M)
MAXIMUM
DISTANCE
SV1751
35 ft. (10.7 m) Rise: The maximum distance the
Condenser or Condensing Unit can be above the ice
machine.
15 FT. (4.5 M)
MAXIMUM
DISTANCE
SV1750
15 ft. (4.5 m) Drop: The maximum distance the
Condenser or Condensing Unit can be below the ice
machine.
Part Number STH025 7/11
31
Calculated Line Set Distance
The maximum calculated distance is 150' (45.7 m).
Line set rises, drops, horizontal runs (or combinations
of these) in excess of the stated maximums will
exceed compressor start-up and design limits. This will
cause poor oil return to the compressor.
Make the following calculations to make sure the line
set layout is within specifications.
1. Insert the measured rise into the formula below.
Multiply by 1.7 to get the calculated rise.
(Example: A condenser located 10 feet above the
ice machine has a calculated rise of 17 feet.)
2. Insert the measured drop into the formula below.
Multiply by 6.6 to get the calculated drop.
(Example. A condenser located 10 feet below the
ice machine has a calculated drop of 66 feet.)
3. Insert the measured horizontal distance into the
formula below. No calculation is necessary.
4. Add together the calculated rise, calculated
drop, and horizontal distance to get the total
calculated distance. If this total exceeds 150'
(45.7 m), move the condenser to a new location
and perform the calculations again.
Maximum Line Set Distance Formula
Step 1
Measured Rise ____ X 1.7 = ______Calculated Rise
(35 ft. Max)
Step 2
Measured Drop ____ X 6.6 = ______Calculated Drop
(15 ft. Max.)
Step 3
Measured Horizontal Distance = _________Horizontal
(100 ft. Max.)
Distance
Step 4
Total Calculated Distance = ________Total Calculated
(150 ft. Max.)
Distance
32
Part Number STH025 7/11
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Part Number STH025 7/11
33
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34
Part Number STH025 7/11
Part Number STH025 7/11
WATER
TROUGH
WATER CURTAIN
WATER LEVEL PROBE
!
]
WATER PUMP
[
Off
On / Off Mode
WATER DISTRIBUTION TUBE
DISPLAY
CONTROL BOX
EVAPORATOR
REFRIGERATION
ACCESS VALVES
ICE THICKNESS
CONTROL
Component Identification
I Model Single Evaporator Models
35
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36
Part Number STH025 7/11
Maintenance
Cleaning and Sanitizing
GENERAL
You are responsible for maintaining the ice machine in
accordance with the instructions in this manual.
Maintenance procedures are not covered by the
warranty.
Clean and sanitize the ice machine every six months
for efficient operation. If the ice machine requires more
frequent cleaning and sanitizing, consult a qualified
service company to test the water quality and
recommend appropriate water treatment. An
extremely dirty ice machine must be taken apart for
cleaning and sanitizing.
Manitowoc Ice Machine Cleaner and Sanitizer are the
only products approved for use in Manitowoc ice
machines.
Part Number STH025 7/11
37
! Caution
Use only Manitowoc approved Ice Machine
Cleaner and Sanitizer for this application
(Manitowoc Cleaner part number 94-0546-3 and
Manitowoc 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.
! Caution
Do not mix Cleaner and Sanitizer solutions
together. It is a violation of Federal law to use
these solutions in a manner inconsistent with their
labeling.
! Warning
Wear rubber gloves and safety goggles (and/or
face shield) when handling Ice Machine Cleaner
or Sanitizer.
38
Part Number STH025 7/11
CLEANING/SANITIZING PROCEDURE
This procedure must be performed a minimum of once
every six months.
• The ice machine and bin must be disassembled
cleaned and sanitized.
• All ice produced during the cleaning and sanitizing
procedures must be discarded.
• Removes mineral deposits from areas or surfaces
that are in direct contact with water.
PREVENTATIVE MAINTENANCE CLEANING
PROCEDURE
• This procedure cleans all components in the water
flow path, and is used to clean the ice machine
between the bi-yearly cleaning/sanitizing
procedure.
EXTERIOR CLEANING
Clean the area around the ice machine as often as
necessary to maintain cleanliness and efficient
operation.
Wipe surfaces with a damp cloth rinsed in water to
remove dust and dirt from the outside of the ice
machine. If a greasy residue persists, use a damp
cloth rinsed in a mild dish soap and water solution.
Wipe dry with a clean, soft cloth.
The exterior panels have a clear coating that is stain
resistant and easy to clean. Products containing
abrasives will damage the coating and scratch the
panels.
• Never use steel wool or abrasive pads for
cleaning.
• Never use chlorinated, citrus based or abrasive
cleaners on exterior panels and plastic trim pieces.
Part Number STH025 7/11
39
Cleaning / Sanitizing Procedure
! Caution
Use only Manitowoc approved Ice Machine
Cleaner and Sanitizer for this application
(Manitowoc Cleaner part number 94-0546-3 and
Manitowoc 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 PROCEDURE
! Caution
Do not mix Cleaner and Sanitizer solutions
together. It is a violation of Federal law to use
these solutions in a manner inconsistent with their
labeling.
! 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.
NOTE: Although not required and dependant on your
installation, removing the ice machine top cover may
allow easier access.
40
Part Number STH025 7/11
Step 1 Open the front door to access the evaporator
compartment. Ice must not be on the evaporator
during the clean/sanitize cycle. Follow one of the
methods below:
• Press the power switch at the end of a harvest
cycle after ice falls from the evaporator(s).
• Press the power switch and allow the ice to melt
.
! Caution
Never use anything to force ice from the
evaporator. Damage may result.
Step 2 Remove all ice from the bin/dispenser.
Step 3 Press the clean switch. Water will flow
through the water dump valve and down the drain.
Wait until the water trough refills and the display
indicates add solution (approximately 1 minute), then
add the proper amount of ice machine cleaner.
Model
I0300/I0320/I0520
I0450/I0500/I0600
I0850/I1000/I1200
I1400/I1800
Part Number STH025 7/11
Amount of Cleaner
3 ounces (90 ml)
5 ounces (150 ml)
9 ounces (265 ml)
41
Step 4 Wait until the clean cycle is complete
(approximately 24 minutes). Then disconnect power to
the ice machine (and dispenser when used).
! Warning
Disconnect the electric power to the ice machine
at the electric service switch box.
Step 5 Remove parts for cleaning.
Please refer to the proper parts removal for your ice
machine. Continue with step 6 when the parts have
been removed.
Single Evaporator Ice Machines - page 46
Step 6 Mix a solution of cleaner and lukewarm water.
Depending upon the amount of mineral buildup, a
larger quantity of solution may be required. Use the
ratio in the table below to mix enough solution to
thoroughly clean all parts.
Solution
Type
Cleaner
42
Water
Mixed With
1 gal. (4 L)
16 oz (500 ml)
cleaner
Part Number STH025 7/11
Step 7 Use 1/2 of the cleaner/water mixture to clean
all components. The cleaner solution will foam when it
contacts lime scale and mineral deposits; once the
foaming stops use a soft-bristle nylon brush, sponge
or cloth (NOT a wire brush) to carefully clean the parts.
Soak parts for 5 minutes (15 - 20 minutes for heavily
scaled parts). Rinse all components with clean water.
Step 8 While components are soaking, use 1/2 of the
cleaner/water solution to clean all food zone surfaces
of the ice machine and bin (or dispenser). Use a nylon
brush or cloth to thoroughly clean the following ice
machine areas:
• Side walls
• Base (area above water trough)
• Evaporator plastic parts - including top, bottom,
and sides
• Bin or dispenser
Rinse all areas thoroughly with clean water.
SANITIZING PROCEDURE
Step 9 Mix a solution of sanitizer and lukewarm
water.
Solution
Type
Sanitizer
Water
Mixed With
3 gal. (12 L)
2 oz (60 ml) sanitizer
Step 10 Use 1/2 of the sanitizer/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/water solution. Do not rinse parts after
sanitizing.
Part Number STH025 7/11
43
Step 11 Use 1/2 of the sanitizer/water solution to
sanitize all food zone surfaces of the ice machine and
bin (or dispenser). Use a spray bottle to liberally apply
the solution. When sanitizing, pay particular attention
to the following areas:
• Side walls
• Base (area above water trough)
• Evaporator plastic parts - including top, bottom and
sides
• Bin or dispenser
Do not rinse the sanitized areas.
Step 12 Replace all removed components.
Step 13 Wait 20 minutes.
Step 14 Reapply power to the ice machine and press
the Clean button.
44
Part Number STH025 7/11
Step 15 Wait until the water trough refills and the
display indicates add solution (approximately 1
minute). Add the proper amount of Manitowoc Ice
Machine Sanitizer to the water trough by pouring
between the water curtain and evaporator.
Model
I0300/I0320/I0520
I0450/I0500/I0600
I0850/I1000/I1200
I1400/I1800
Amount of Sanitizer
3 ounces (90 ml)
3 ounces (90 ml)
12 ounces (355 ml)
Step 16 Select auto ice on, press the checkmark and
close and secure the front door. The ice machine will
automatically start ice making after the sanitize cycle
is complete (approximately 24 minutes).
Part Number STH025 7/11
45
PARTS REMOVAL FOR CLEANING/SANITIZING.
E
D
A
C
B
Off
On / Off Mode
[
!
]
A. Remove the water curtain
•
•
Gently flex the curtain in the center and remove it
from the right side.
Slide the left pin out.
B. Remove the water trough
•
•
Depress tabs on right and left side of the water
trough.
Allow front of water trough to drop as you pull
forward to disengage the rear pins.
C. Remove the water level probe
•
•
•
•
46
Pull the water level probe straight down to
disengage.
Lower the water level probe until the wiring
connector is visible.
Disconnect the wire lead from the water level
probe.
Remove the water level probe from the ice
machine.
Part Number STH025 7/11
D. Remove the ice thickness probe
•
•
Compress the hinge pin on the top of the ice
thickness probe.
Pivot the ice thickness probe to disengage one pin
then the other. The ice thickness probe can be
cleaned at this point without complete removal. If
complete removal is desired, disconnect the ice
thickness control wiring from the control board.
E. Remove the water distribution tube
NOTE: Distribution tube thumbscrews are retained to
prevent loss. Loosen thumbscrews but do not pull
thumbscrews out of distribution tube.
• Loosen the two outer screws (do not remove
screws completely they are retained to prevent
loss) and pull forward on the distribution tube to
release from slip joint.
• Disassemble distribution tube by loosening the two
(2) middle thumbscrews and dividing the
distribution tube into two pieces.
Proceed to page 43, Step 7
Part Number STH025 7/11
47
Ice Thickness Probe & Water Level Probe
Clean the probes using the following procedure.
1. Mix a solution of Manitowoc ice machine cleaner
and water (2 ounces of cleaner to 16 ounces of
water) in a container.
2. Soak probes in container of cleaner/water solution
while disassembling and cleaning water circuit
components (soak probes for 10 minutes or
longer).
3. Clean all probe surfaces including all plastic parts
(do not use abrasives). Verify all surfaces are
clean. Thoroughly rinse probes with clean water.
4. Reinstall probe, then sanitize the ice machine and
bin/dispenser interior surfaces.
48
Part Number STH025 7/11
Water Inlet Valve
The water inlet valve normally does not require
removal for cleaning. Refer to “Water System
Checklist” page 132, if you are troubleshooting water
related problems.
1. When the ice machine is off, the water inlet valve
must completely stop water flow into the machine.
Watch for water flow.
When the ice machine is on, the water inlet valve must
allow the proper water flow through it. Press the Power
button to energize the ice machine. Watch for water
flow into the ice machine. If the water flow is slow or
only trickles into the ice machine, refer to water
system checklist.
! Warning
Disconnect the electric power to the ice machine
and dispenser at the electric service switch box and
turn off the water supply before proceeding.
Follow the procedure below to remove the water inlet
valve.
1. Remove the 1/4” hex head screws.
2. Remove, clean, and install the filter screen.
4 Hex Head
Screws
Part Number STH025 7/11
49
Water Dump Valve
The water dump valve normally does not require
removal for cleaning. To determine if removal is
necessary:
1. Locate the water dump valve.
2. Press the power button and stop ice making.
3. While the ice machine is in the freeze mode,
check the water trough to determine if the dump
valve is leaking. If there is no or little water in the
water trough (during the freeze cycle) the dump
valve is leaking.
A. If the dump valve is leaking, remove,
disassemble and clean it.
B. If the dump valve is not leaking, do not
remove it. Instead, follow the “Ice Machine
Cleaning Procedure”.
Follow the procedure below to remove the dump
valve.
! Warning
Disconnect the electric power to the ice machine
at the electric service switch box and turn off the
water supply before proceeding.
4. If so equipped, remove the water dump valve
shield from its mounting bracket.
5. Leaving the wires attached, twist coil and rotate it
counter-clockwise1/4 turn.
6. Lift the coil assembly off the valve body.
7. Remove the spring, plunger, and nylon gasket
from the valve body.
NOTE: At this point, the water dump valve can easily
be cleaned. If complete removal is desired, continue
with step 5.
Important
The plunger and the inside of the enclosing tube
must be completely dry before assembly.
50
Part Number STH025 7/11
NOTE: During cleaning, do not stretch or damage the
spring.
1. Remove the tubing from the dump valve by
twisting the clamps off.
2. Remove the valve body, twist off.
COIL
SPRING
PLUNGER
NYLON GASKET
DIAPHRAM
MOUNTING BRACKET
VALVE BODY
Dump Valve Disassembly
Part Number STH025 7/11
51
Removal from Service/Winterization
General
Special precautions must be taken if the ice machine is
to be removed from service for an extended period of
time or exposed to ambient temperatures of 32°F
(0°C) or below.
! Caution
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.
AIR-COOLED ICE MACHINES
1. Press the power button.
2. Disconnect the electric power at the circuit
breaker or the electric service switch.
3. Turn off the water supply.
4. Remove the water from the water trough.
5. Disconnect and drain the incoming ice-making
water line at the rear of the ice machine.
6. Energize the ice machine and wait one minute for
the water inlet valve to open.
7. 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
water inlet lines or the drain.
8. Make sure water is not trapped in any of the water
lines, drain lines, distribution tubes, etc.
52
Part Number STH025 7/11
WATER-COOLED ICE MACHINES
1. Perform steps 1-6 under “Self-Contained AirCooled Ice Machines.”
2. Disconnect the incoming water and drain line from
the water-cooled condenser.
3. Energize the ice machine in the freeze cycle. The
increasing refrigerant pressure will open the water
regulating valve.
4. Blow compressed air through the condenser until
no water remains.
Part Number STH025 7/11
53
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Part Number STH025 7/11
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Part Number STH025 7/11
55
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56
Part Number STH025 7/11
Power Button
Cleaning Button
Manitowoc
LCD Display
Navigation Arrows
Menu
Button
Checkmark
Operation
Control Panel Features
The control panel offers a series of pressure sensitive
buttons and a four-line interactive display panel.
BUTTONS
Power Button: Powers the ice machine when in the
On/Off Mode. The ice machine can also be
programmed to automatically power on and off in two
Energy Saver modes.
Cleaning Button: Initiates a cleaning cycle. Refer to
the Maintenance section for details.
Part Number STH025 7/11
57
Menu Button: Moves the display from the Home
Screen, where ice machine status, alerts and
messages are viewed, to the Main Menu, where
machine information and its event log can be
accessed, machine and Energy Saver settings can be
adjusted, and service issues can be addressed.
Left and Right Arrows: The Left arrow moves the
display to the previous screen, allowing the user to
“back out” of programming. Both the Left and Right
arrows will move the cursor (underline) within a line of
settings. NOTE: The Right arrow can also be used on
many screens interchangeably with the checkmark to
make a selection.
Up and Down Arrows: Move the highlight
[brackets] up one line or down one line.
Checkmark: Makes a selection and/or moves to the
next screen (or line).
DISPLAY PANEL
The LCD display panel is 16 characters wide and four
lines deep. During ice machine operation and cleaning
cycles, the Home screen’s top three lines provide
valuable status information and the fourth line shows
alerts and messages. In programming, four lines of the
current screen are displayed and highlights, arrows,
cursor and selections inform the user of available
actions.
58
Part Number STH025 7/11
Menu Navigation Overview
Menu Navigation Overview
Clean
Button
AuCS
Timer
Initiated
Clean
Function
AuCS
Clean
Function
On/Off
Button
Press Left
Arrow From
Main Menu
Home Screen
When
Alert
Present
When
Message
Present
Alerts
Menu
Messages
Menu
Menu
Button
Main Menu Function
(Optional)
Password Entry
Machine
Info
90/70 cap
Model #
IMH Serial #
Cond Serial #
Warranty
-Machine
-Evaporator
-Compressor
Install Date
Manuf Date
Main SW Ver
Disply SW Ver
Set-Up
Language
Time & Date
Time Config
Units
Ice Clarity
LCD Bright
Password On/Off
Edit Password
Clean Minder
AuCS Run Time
Air Filter
Water Filter
LuminIce
Ice Bin Sensor
USB Setup
Part Number STH025 7/11
Energy
Saver
Ice Program
Water Miser
Statistics
Fact
Deflts
Defaults
Exit
Service
Data History
Real Time Data
Diagnostics
Manual Harvest
Repl Cnt Bd
USB Setup
Event Log
59
Display Panel Navigation
[Language
Time & Date
Time Config
Units
>]▼
>
>
> ▼
Highlights: Brackets indicate if a line on the screen
is “highlighted” or actionable. Move the brackets from
line to line using the Down or Up arrow. Move the
brackets down from the fourth line to view more of the
menu displayed.
Arrows: Two kinds of arrows give cues to additional
information. “>” symbols show that another screen is
available by pressing Checkmark while a line is
highlighted. “▼” and “▲” symbols indicate the limits
of the screen viewed. NOTE: Another cue to the length
of a menu screen is that Exit is the last item.
07 24 10
14:08
Exit
60
>
Part Number STH025 7/11
Cursor: A cursor (underline) is used within lines
where actual settings can be adjusted. In these
screens, use the Up and Down arrows to make
changes to the value underlined. Move the cursor from
digit to digit using the Right and Left arrows. Use the
Checkmark to move the cursor down one line. Exit and
re-enter the screen to start again at the top.
[Mo/Day/Yr
Day/Mo/Yr
12 Hour
24 Hour
(
(
(
(
)]▼
)
)
) ▼
Selections: When parentheses ( ) appear, they
indicate a selection is available by pressing
Checkmark while the line is highlighted. If the choice is
exclusive, selecting it with the Checkmark will uncheck
another selection. That is, in the above Time Config
example, selecting Day/Mo/Yr will deselect Mo/Day/
Yr.
Part Number STH025 7/11
61
Alerts and Messages
When messages and alerts exist, they will be
highlighted and can be selected with the Left arrow.
Alerts displayed will have priority over messages.
Off
On / Off Mode
[
!
]
For example, if alerts are appearing in the fourth line of
the display:
1. Press the Left arrow. A list of alerts will appear in
the display.
2. Choose the alert you wish to address by moving
the highlight brackets with the Down arrow.
3. Press Checkmark again. A screen appears with
the date, time and total number of times an alert
has occurred. Pressing the Down arrow will list
some possible causes for the alert. At the bottom
of the screen you will be able to clear the alert by
pressing the Checkmark.
4. Return to the Home screen by selecting Exit and
pressing the Checkmark.
62
Part Number STH025 7/11
Machine Info
Set-Up
Energy Saver
Factory Defaults
Service
Exit
Main Menu
Main Menu
From the Home screen, press the Menu button to
enter the Main menu, where you can choose to see
machine information, make setup changes, set the
Energy Saver mode, or enter the Service Menu.
Part Number STH025 7/11
63
Machine Info Menu
From the Main menu, ensure that Machine Info is
highlighted and press the Checkmark to view a list
including capacity, model number, IMH (Ice Machine
Head) serial number, condenser serial number,
warranty, installation date, date of manufacture and
software version. Use the Down arrow to highlight an
item and use the Checkmark to view the information.
Press the Left arrow to return to previous screens.
Set-Up
Language
Time & Date
Time Configuration
Units
Ice Clarity
LCD Bright
Password On
Edit Password
Clean Minder
AuCS RunTime
Air Filter
Water Filter
LUMINICE
Ice Bin Sensor
USB Setup
Exit
Set-Up Menu
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Part Number STH025 7/11
Password Entry
A password is not required, although a password can
be turned on to prevent unauthorized control setting
modification. You can use the Factory Default
Password of "1234" or enter a four digit custom pin
number of your choosing.
To turn on the password feature use the following
procedure.
1. Press the Menu button.
2. From the Main menu, use the Down arrow to
highlight setup and press the Right arrow.
3. Use the Down arrow to highlight Password ON
and press the Right arrow.
4. Press the Right arrow again with Enter Passwrd
highlighted and an icon will flash.
5. Use the Up & Down arrows to enter the factory
password (1, 2, 3, 4). Enter the number 1 in the
flashing icon (first digit of the factory password).
6. Press the right arrow to move to the next cell and
use the Up & Down arrows to add the number 2.
Repeat this process to add 3 & 4.
7. When the last number is entered press the
Checkmark button to save your entry.
Enter Passwrd ▲
[
]
Exit
>
Part Number STH025 7/11
65
To enter a four digit password of your choosing
use the following procedure.
1. Press the Menu button.
2. From the Main menu, use the Down arrow to
highlight setup and press the Right arrow.
3. Use the Down arrow to select Edit Password and
press the Right arrow.
4. Using the Up & Down arrows, enter the first digit
of the factory password in the flashing icon.
5. Press the right arrow to move to the next cell and
use the Up & Down arrows to add the number 2.
Repeat this process to add 3 & 4.
6. When the last number is entered press the
Checkmark button.
7. Follow steps 4 & 5 and enter your 4 digit
password.
8. When the last number is entered press the
Checkmark button to save your entry.
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Part Number STH025 7/11
RESET PASSWORD TO FACTORY DEFAULTS
The password can be reset to the factory defaults
when required. The default factory password is 1234.
To reset the ice machine to factory defaults use the
following procedure.
1. Press the Menu button.
2. From the Main menu, use the Down arrow to
highlight Defaults
3. Press the Checkmark button two times to reset
the ice machine. The display will return to the SetUp menu and the defaults listed below will be in
effect. Refer to Setup to adjust settings.
Setting
Language
Time/Date
Time Configuration
Units
Ice Clarity
LCD Brightness
Password On
Edit Password
Clean Minder
AuCS RunTime
Air Filter Minder
Water Filter Minder
LuminIce Bulb Minder
Ice Bin Sensor
Part Number STH025 7/11
Default
English
Month/Day/Year/Time
Mo/Day/Yr/24 Hour
Fahrenheit/Lbs/Gallons
Off
Level 2
Off - Enter Password
Default Password = 1234
Off - Edit password
Off
Off
Off
Auto
No
None
67
Set-Up Menu
From the Main menu, use the Down arrow to navigate
to Set-Up and press the Checkmark. Select and
customize machine settings on this menu. Press the
Left arrow to return to previous screens.
LANGUAGE
1. From the Set-Up menu, use the Down arrow to
highlight Language.
2. Press the Checkmark. You can choose to view the
display in a language other than English, by
highlighting your choice and pressing the
Checkmark. Selecting one language will deselect
the others.
3. When the check reflects your preference, use the
Down arrow to navigate to Exit and press the
Checkmark. The display will return to the Set-Up
menu.
TIME & DATE
When the ice machine is installed, the correct
time and date needs to be set for its location.
[Mo/Day/Yr
Day/Mo/Yr
12 Hour
24 Hour
(
(
(
(
)]▼
)
)
) ▼
Set the Time and Date
1. Press the Menu button.
2. Press the Down arrow until Set-Up is highlighted
[bracketed].
3. Press the Checkmark. The Set-Up menu will be
displayed and Time & Date will be highlighted
[bracketed].
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Part Number STH025 7/11
4. Press the Checkmark. The date will appear on the
first line of the display (Mo/Day/Yr) and the time
will appear on the second line (24 Hour). The
month will have a blinking cursor.
5. Using the Up or Down arrow, adjust the month, if
necessary.
6. When the correct month appears, use the Right
arrow to move the blinking cursor to day.
7. Using the Up or Down arrow, adjust the day, if
necessary.
8. When the correct day appears, use the Right
arrow to move the blinking cursor to year.
9. Using the Up or Down arrow, adjust the year, if
necessary.
10. When the correct year appears, press the
Checkmark. Use the Right arrow to move the
blinking cursor to hour.
11. Using the Up or Down arrow, adjust the hour, if
necessary.
12. When the correct hour appears, use the Right
arrow to move the blinking cursor to minutes.
13. Using the Up or Down arrow, adjust the minutes, if
necessary.
14. When the correct minutes appear, press the
Checkmark twice.
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69
TIME CONFIGURATION
1. From the Set-Up menu, use the Down arrow to
highlight Time Config.
2. Press the Checkmark. On this screen, you can
choose whether the date will be displayed as
Mo/Day/Yr or Day/Mo/Yr by highlighting your
choice and pressing the Checkmark. Selecting
one will deselect the other.
3. You can also choose whether the time will be
displayed as 12 Hour or 24 Hour by highlighting
your choice and pressing the Checkmark.
Selecting one will deselect the other.
4. When the two checks reflect your preference, use
the Down arrow to navigate to Exit and press the
Checkmark. The display will return to the Set-Up
menu.
UNITS
1. From the Set-Up menu, use the Down arrow to
highlight Units.
2. Press the Checkmark. On this screen, you can
choose whether the ice machine will display
measurements in Celsius or Fahrenheit,
kilograms or pounds, and gallons or liters by
highlighting your choice of each pair and pressing
the Checkmark. Selecting one of each pair will
deselect the other. Make sure to navigate with the
Down arrow to make all three choices.
3. When the three checks reflect your preferences,
use the Down arrow to navigate to Exit and press
the Checkmark. The display will return to the SetUp menu.
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Part Number STH025 7/11
ICE CLARITY
In areas with poor potable water quality, the ice
machine makes cloudy ice. Setting Ice Clarity to ON
will add additional water during the freeze cycle to
dilute the water that contains a high content of
dissolved solids in the water trough. This feature
decreases production and increases water usage. A
water filter is recommended to produce the highest
quality ice while maintaining the least expensive mode
of operation.
1. From the Set-Up menu, use the Down arrow to
highlight Ice Clarity.
2. Press the Checkmark. On this screen, you can
choose to turn the ice clarity feature ON or OFF
by highlighting your choice and pressing the
Checkmark. Selecting one will deselect the other.
3. When the check reflects your preference, use the
Down arrow to navigate to Exit and press the
Checkmark. The display will return to the Set-Up
menu.
LCD BRIGHTNESS
Here, the brightness of the LCD display can be
adjusted.
1. From the Set-Up menu, use the Down arrow to
highlight LCD Bright.
2. Press the Checkmark. You will see one of four
checkmarks indicating the brightness levels of the
display. Level 1 is one checkmark, level 2 is two
checkmarks, Level 3 is three checkmarks, etc.
3. Use the Up and Down arrows to select your
preference.
4. When the checkmarks reflect your preference,
press the Checkmark. The display will return to
the Set-Up menu.
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71
PASSWORD ON
A password can be added to prevent unauthorized
changes to ice machine settings.
1. From the Set-Up menu, use the Down arrow to
highlight Password On.
2. Enter the password and press the Checkmark.
3. Press the Left arrow to return to previous screens
and to the Set-Up menu.
EDIT PASSWORD
The password can be changed on this screen
1. From the Set-Up menu, use the Down arrow to
highlight Edit Password.
2. Press the Checkmark and confirm current
password.
3. Enter new password and press the Checkmark.
4. Press the Left arrow to return to previous screens
and to the Set-Up menu.
CLEAN MINDER
Clean Minder is a feature that displays a cleaning
reminder at a set time interval.
1. From the Set-Up menu, use the Down arrow to
highlight Clean Minder.
2. Press the Checkmark. On this screen, you can
choose to turn the reminder ON or OFF by
highlighting your choice and pressing the
Checkmark. Selecting one will deselect the other.
3. You can also choose the time interval from this
screen by highlighting Set Interval and pressing
the Checkmark.
4. Press the Left arrow to return to previous screens
and to the Set-Up menu.
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Part Number STH025 7/11
IAUCS RUNTIME
Automatic Cleaning System is an optional accessory
and will perform a cleaning cycle at a set time interval.
1. From the Set-Up menu, use the Down arrow to
highlight AuCS RunTime.
2. Press the Checkmark. On this screen, you can
choose to turn the feature ON or OFF by
highlighting your choice and pressing the
Checkmark. Selecting one will deselect the other.
3. You can also choose the time interval from this
screen by highlighting Set Interval and pressing
the Checkmark.
4. Press the Left arrow to return to previous screens
and to the Set-Up menu.
AIR FILTER
The ice machine has a feature that displays a clean air
filter reminder at a set time interval.
1. From the Set-Up menu, use the Down arrow to
highlight Air Filter.
2. Press the Checkmark. On this screen, you can
choose to turn the reminder to AUTO or OFF by
highlighting your choice and pressing the
Checkmark. Selecting one will deselect the other.
3. You can also choose the time interval from this
screen by highlighting Set Interval and pressing
the Checkmark.
4. Press the Left arrow to return to previous screens
and to the Set-Up menu.
Part Number STH025 7/11
73
WATER FILTER
The ice machine has a feature that displays a replace
water filter reminder at a set time interval.
1. From the Set-Up menu, use the Down arrow to
highlight Water Filter.
2. Press the Checkmark. You can record the filter
type on this screen by highlighting Filter Type and
pressing the Checkmark.
3. After making your selection, press the Left arrow
to return to the previous screen.
4. On this screen, you can also choose to turn the
reminder to AUTO or OFF by highlighting your
choice and pressing the Checkmark. Selecting
one will deselect the other.
5. You can further choose the time interval from this
screen by highlighting Set Interval and pressing
the Checkmark.
6. Press the Left arrow to return to previous screens
and to the Set-Up menu.
LUMINICE™ REMINDER
The LuminIce™ growth inhibitor recirculates the air in
the ice machine foodzone over a UV bulb. This
process will inhibit the growth of common microorganisms on all exposed foodzone surfaces.
The Bulb Minder is a feature that displays a reminder
to change its bulb every 12 months.
1. From the Set-Up menu, use the Down arrow to
highlight LuminIce Minder.
2. Press the Checkmark. On this screen, you can
choose to turn the reminder to AUTO or OFF by
highlighting your choice and pressing the
Checkmark. Selecting one will deselect the other.
3. When the check reflects your preference, use the
Down arrow to navigate to Exit and press the
Checkmark. The display will return to the Set-Up
menu.
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Part Number STH025 7/11
USB SETUP
Refer to “Upgrading Firmware with a Flash Drive” and
“Exporting Data to a Flash Drive” for more information
on this setting. Flash drives must be correctly sized
and formatted - 2 gigabytes or smaller, Fat 32 file
system, 512 allocation units - Refer to page 88 for full
specification and formatting details.
FACTORY DEFAULTS
The entire setup can be reset to the factory defaults.
1. From the Set-Up menu, use the Down arrow to
highlight Fact Deflts.
2. Press the Checkmark two times to reset the ice
machine. The display will return to the Set-Up
menu.
Setting
Language
Time/Date
Time Configuration
Units
Ice Clarity
LCD Brightness
Password
Edit Password
Clean Minder
AuCS RunTime
Air Filter Minder
Water Filter Minder
LuminIce Bulb Minder
Ice Bin Sensor
Default
English
Month/Day/Year/Time
Mo/Day/Yr/24 Hour
Fahrenheit/Lbs/Gallons
Off
Level 2
Off - Enter Password
Default Password = 1234
Off - Edit Password
Off
Off
Off
Auto
No
None
For more details and instructions for changing
ice machine settings, see “Set-Up Menu”.
Part Number STH025 7/11
75
Energy Saver Menu
From the Main menu, use the Down arrow to navigate
to Energy Saver and press the Checkmark. Set up an
energy saving ice program, enable the Water Miser
and view usage statistics from this menu. Press the
Left arrow to return to previous screens.
Energy Saver
Ice Program
Water Miser
Statistics
Exit
Energy Saver Menu
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Part Number STH025 7/11
ICE PROGRAM
To save energy and water, the ice machine can be
programmed to only power up during time periods that
the ice will be used or when the bin level is being
depleted by heavy use.
Important
Setting an ice program will take the ice machine
out of the On/Off Mode and the Power button will
be disabled.
1. In the Energy Saver menu, ensure that Ice
Program is highlighted.
2. Press the Checkmark. On this screen, you can
choose to turn on the time program or the bin
level program by highlighting your choice and
pressing the Checkmark. Selecting one will
deselect the other. If one of them is selected and
you wish to turn both off, highlight the choice and
press Checkmark again.
3. If neither of the programs is selected, highlighting
Settings and pressing the Checkmark will simply
return to the top of this screen. If one of the
programs is selected, highlight Settings and press
the Checkmark to choose the times or bin levels.
NOTE: For details on how to use the cursor for
the time program, refer to “Display Panel
Navigation” in this section.
4. Select Exit to return to previous screens and
again to the Energy Saver menu.
Part Number STH025 7/11
77
WATER MISER
Water Miser is a feature that reduces water usage by
eliminating flush cycles. Enabling this feature is only
recommended for systems with de-ionized or reverse
osmosis filtering.
1. From the Energy Saver menu, use the Down
arrow to highlight Water Miser.
2. Press the Checkmark. On this screen, you can
choose to turn the Water Miser ON or OFF by
highlighting your choice and pressing the
Checkmark. Selecting one will deselect the other.
NOTE: Settings will not be saved if the Checkmark is
not pressed after choosing On or Off.
3. Press the Left arrow to return to previous screens
and to the Energy Saver menu.
STATISTICS
1. From the Energy Saver menu, use the Down
arrow to highlight Statistics.
2. Press the Checkmark. Choose to view ice
production, potable water usage or energy usage
statistics by highlighting your choice and pressing
the Checkmark.
3. Press the Left arrow to return to previous screens
and to the Energy Saver menu.
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Part Number STH025 7/11
Service Menu
From the Main menu, use the Down arrow to navigate
to Service and press the Checkmark. This menu is
intended for the use of trained service personnel.
Below is and overview of the service menu. The
following pages list the navigation options available by
drilling into the menus with the down arrow.
Service
Data History
00000000
00000000
00000000
00000000
00000000
00000000
Lifetime
Exit
RealTime Data
Time & Temp
Inputs
Outputs
Exit
Diagnostics
Control Board
Temp Sensors
Inputs
Exit
Man Harvest
Hrvst Started
Exit
Repl Cntl Bd
Manual Setup
USB Setup
Exit
USB Setup
USB Stick
Exit
Event Log
View ELog
Clear ELog
Exit
Exit
Part Number STH025 7/11
79
DATA HISTORY
Press the Checkmark with Data History highlighted to
view a list of eight-digit dates (Current, Current + 1 ...
Current + 5), along with Lifetime (be sure to use the
Down arrow to reveal all the available information).
For each of the dates, use the Checkmark to view:
• Minimum Freeze
• Maximum Freeze
• Minimum Harvest
• Maximum Harvest
• Maximum Temperature Delta T3 - T4
• Delta
• T3
• T4
• RunTime
• Ice Production
• Cycle Count
• Potable Water
• Clean Cycles
• Exit
For Lifetime, use the Checkmark to view:
• Install Date
• Control Board Replacement Date
• Control Board DOM (Date Of Manufacture)
• RunTime
• Cycle Count
• Potable Water
• Clean Cycles
• Exit
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Part Number STH025 7/11
REAL TIME DATA
Press the Checkmark with Real Time Data highlighted
to get readings on Time & Temp, Inputs and Outputs
(be sure to use the Down arrow to reveal all the
available information).
Use the Checkmark to view:
Time and Temperature
• Status Off/On - Displays stage of cycle
• Time
• T1 Thermistor Temperature
• T2 Thermistor Temperature
• T3 Thermistor Temperature
• T4 Thermistor Temperature
• T3 & T4 Delta Temperature
• 100 hz
• 120 hz
• Exit
Inputs
• Status Off/On - Displays stage of cycle
• Curtain Switch 1
• Curtain Switch 2
• LPCO Switch
• HPCO Switch
• Bin Level - Low (Optional Bin Level Probe) Status
• Bin Level - Medium (Optional Bin Level Probe)
Status
• Bin Level High (Optional Bin Level Probe) Status
• Sensing Ice No/Yes
• Water Level Low No/Yes
• Water Level High No/Yes
• Exit
Continued on next page …
Part Number STH025 7/11
81
Outputs
• Status Off/On - Displays stage of cycle
• Water Pump Off/On
• Hot Gas Valve 1 Off/On
• Hot Gas Valve 2 Off/On
• Air Pump Off/On
• Water Valve Off/On
• Dump Valve Off/On
• Compressor Control Off/On
• AuCS Relay Off/On
• LuminIce Off/On
• Exit
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Part Number STH025 7/11
DIAGNOSTICS
Press the Checkmark with Diagnostics highlighted to
enter screens where you can run diagnostics on the
control board, sensors and switches.
Control Board
• Self Check
• Enable Relays
• Exit
Temperature Sensors
• T1 Thermistor Temperature
• T2 Thermistor Temperature
• T3 Thermistor Temperature
• T4 Thermistor Temperature
• Exit
Inputs
• Curtain Switch 1 Closed/Open
• Curtain Switch 2 Closed/Open
• LPCO Switch Closed/Open
• HPCO Switch Closed/Open
• Bin Level - Low (Optional Bin Level Probe) Closed/
Open
• Bin Level - Medium (Optional Bin Level Probe)
Closed/Open
• Bin Level - High (Optional Bin Level Probe)
Closed/Open
• Sensing Ice No/Yes
• Water Level Low No/Yes
• Water Level High No/Yes
• Exit
Part Number STH025 7/11
83
MANUAL HARVEST
Press the Checkmark with Manual Harvest highlighted
to initiate a manual harvest.
Manual Harvest
• Harvest Started
• Exit
REPLACE CONTROL BOARD
Press the Checkmark with Replace Control Board
highlighted to program the replacement control board.
The data can copied from the defective control board
(refer to exporting data to a flash drive page xx), or
entered manually through the Indigo interface.
• Manual Setup
• Board Install Date
• Input Model Number
• Ice Machine serial Number
• Condenser/condensing unit serial number
• USB Setup
• Insert Drive
• Press Checkmark and wait for completion
• Exit
USB SETUP
• USB Stick
• Download Firmware
Insert drive and wait for completion
• Download Configuration
Insert drive and wait for completion
• Export All
Insert drive and wait for completion
• Export Setup
Insert drive and wait for completion
• Exit
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Part Number STH025 7/11
EVENT LOG MENU
From the Service menu, use the Down arrow to
navigate to Event Log and press the Checkmark.
Ensure View ELog is highlighted and press the
Checkmark to see the first event code, when it
occurred and how many times. Use the Down arrow to
view information on subsequent event codes. For
more information on event codes, see “Service Menu”.
Use the Left arrow to return to the Event Log menu.
To clear the event log: In the Event Log Menu, use the
Down arrow to highlight Clear ELog and press the
Checkmark. Press the Left arrow to return to previous
screens.
Event Log
View ELog
Clear ELog
Exit
Event Log Menu
Part Number STH025 7/11
85
EVENT LOG
Refer to the following table for Event Code
descriptions.
Code
Description
E01
Long Freeze Cycle
E02
Long Harvest Cycle
E03
Input Power Loss
E04
High Condenser Temperature
E05
High Pressure Control Opened
E06
Spare
E07
Starving TXV or Low On Charge
E08
TXV Fault
E09
#1 Evaporator Flooding
E10
#2 Evaporator Flooding
E11
Refrigeration Fault
E12
Curtain Switch Fault - Open more than 12 hours
E13
Spare
E14
Spare
E15
Fan Cycle Control Fault - Lo Liquid Line Temperature
E16
Remote Condenser Fault
E17
Spare
E18
Spare
E19
Ice Thickness Probe Fault
E20
Water System Fault
E21
T1 Temperature Sensor Issue
E22
T2 Temperature Sensor Issue
E23
T3 Temperature Sensor Issue
E24
T4 Temperature Sensor Issue
E25
Bin Level Probe Low Sensor Fault
E26
Bin Level Probe Medium Sensor Fault
E27
Bin Level Probe High Sensor Fault
E28
AuCS
E29
USB Communication Fault
E30
USB Download Fault
E31
Safe Mode
E32
RS485 Communication Fault
E33
KeyBoard Fault
E34
Display Fault
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Part Number STH025 7/11
Part Number STH025 7/11
Event Log Detail
Detail Event Log Service Definition
Error Description
Long Freeze
Definition
Long Harvest
Long Harvest
3 consecutive - 3.5 Minute Harvests logs SL#2 in memory, but runs until 500 long harvest cycles occur.
E03
Power Loss
Power Supply (Event Log only No Alarm)
E04
Hi Cnd Temp or Air Condenser High temp, or
water Condenser High
Wtr Cnd Fault
temperature
E05
HPC Fault
When power is interrupted to the ice machine the control board will log the event in the ELOG and
stamp the loss of power on power-up.
1). Liquid Line Temperature too High for Self-contained Air Cooled Ice machine = Air Cooled
Condenser Fault
2). Liquid Line Temperature too High for Self-contained Water Cooled ice machine = Water Cooled
Condenser Fault
The high pressure cutout switch (HPCO) opened
E-Log Display Text
E01
Long Freeze
E02
E06
High Pressure Cutout (HPC)
6 consecutive 60 Minute Freeze cycles = shut down and flash the SL#1 light on board
Spare
87
E07
Starving TXV
Starving Evaporator for single
TXV or low on charge
10 consecutive occurrences where the Difference of the Average evaporator inlet (T3) and outlet (T4)
is greater than 12°F (ELOG-E07)
E08
TXV Fault
TXV malfunction in dual circuit/
single evaps (TXV Fault)
10 consecutive occurrences where the Difference of the Average evaporator inlet (T3) and outlet (T4)
is greater than 12°F (ELOG-E07)
E09
Flood Evap 1
Flooding evaporator for single
circuit single evaporator (flooding
evap)
During the first 6 minutes of the freeze cycle, the compressor discharge line temperature average (T2)
fell below the average temperature of the 6 previous cycles.
E10
Flood Evap 2
Flooding evaporator for dual TXV
dual circuit / single evaporator
(Flooding Evap)
During the first 6 minutes of the freeze cycle, the compressor discharge line temperature average (T2)
fell below the average temperature of the 6 previous cycles.
88
Detail Event Log Service Definition
E-Log Display Text
Error Description
Definition
E11
Refig Fault
Refrigeration System (Refrig
Fault)
The compressor discharge temperature did not increase by at least 10 F, and the evaporator
temperature did not decreased by at least 10 F - Measured from Refrigeration Start up to Two Minutes
into the Freeze cycle.
E12
Curtain Fault
Curtain Switch open for more
than 12 hours (Curtain Fault)
The ice machine is set to ice making and remains in bin full condition for more than 12 hours.
The curtain switch is open or curtain is off.
E13
Spare
E14
Spare
Part Number STH025 7/11
E15
Low Liq Temp
Low amb control fault durring low
amb
If the liquid line temperature drops below 60 F for any period exceeding 1 minute (contiguous) during the
the freeze cycle.
E16
Rmt Cnd Fault
Remot Condenser Fault
If the liquid line temperature drops below 40 F, or exceeds 140 F for more than 1 continuos minute
during the freeze cycle.
E17
Spare
E18
Spare
E19
E20
ITP Fault
WTR Fault
Ice Probe (ITP)
The monitored Frequencies is out of the appropriate range (Probe unplugged or problem with
microphone).
Water System Fault
Any of the following:
1) Sensing high water probe and not low water probe = Water fault.
2) The Evaporator outlet temperature is less than -10°F @ 6 Minutes into freeze.
3) The Water probe is satisfied at the end of harvest.
Part Number STH025 7/11
Detail Event Log Service Definition
E-Log Display Text
Error Description
Definition
E21
T1 Fault
T1 Sensor
E22
T2 Fault
T2 Sensor
E23
T3 Fault
T3 Sensor
E24
T4 Fault
T4 Sensor
E25
Bin Prb Fault
Bin Low Sens
E26
Bin Prb Fault
Bin Med Sens
E27
Bin Prb Fault
Bin Hi Sens
E28
AUCS
AUCS (Aucs not Present) (Event
Log only - No alarm)
E29
USB COMM
USB Comm (Event Log only - No
Alarm)
Engineering purposes Only
E30
USB DNLD
USB download error (dlnd) Event
Log only - No alarm)
Engineering purposes Only
E31
Safe Mode
Safe Mode (Event Log only - No
alarm)
Each thermistor reading is monitored continuously using six second average values. During Pre-chill
a thermistor had a six second average thermistor values fall outside of the valid temperature range.
Each thermistor reading is monitored continuously using six second average values. A
thermistor had a six second average value outside of the valid range for more than 10 continous
minutes
When the AUCS clean option is selected from the menu, the control checks for the presence of the
AUCS board and if the AUCS is not connected it will signal an Event “AUCS”. This will be cleared
as soon as the hardware is detected.
Safe mode is a Timed: Water Fill or Freeze cycle based on the last 5 good cycles.
The controller can enter into safe mode as a result of the following sensor failures;
Ice Thickness Probe (ITP)
Water Level Probe (WLP)
89
USB FLASH DRIVE SPECIFICATIONS AND
FORMATTING
Updating firmware on Indigo™ model ice machines
requires a properly formatted 2 GB or smaller USB
flash drive. All USB flash drives must be formatted
before use to remove any software programs or files
currently on the flash drive.
USB Flash Drive Specifications:
• USB 2 Version
• 2 GB or less capacity
• Fat32 File System
• 512 MB File Allocation Unit
USB Flash Drive Formatting:
Procedure to format a USB flash drive varies with
operating system software.
Windows 7 or Windows Vista Computers:
1. Insert USB flash drive; your computer may
indicate:
• “Found New Hardware” follow the prompts to
install the USB flash drive
• USB flash drive may auto play - Close auto play
window
2. Press Windows Key and E key simultaneously to
access windows explorer.
3. Right click on your USB Flash Drive.
4. Left click on “Format”.
5. Verify or select the settings below:
• USB flash drive capacity - 2 GB or less
• File System - Fat32
• Allocation Unit Size - Must be 512 MB
• Volume Label is Optional - Rename if desired
• Deselect “Perform A Quick Format” (no
checkmark)
6. Left click on “Start” - You will receive a warning “Formatting will remove all data” left click “OK”. A
“Format Complete” box will display when
formatting is finished. Close the pop up and
windows explorer.
90
Part Number STH025 7/11
Windows XP Computers:
1. Insert USB flash drive; your computer may
indicate:
• “Found New Hardware” follow the prompts to
install the USB flash drive
• USB flash drive may auto launch - Close auto
launch window.
2. To access Disk Management:
• Left click on the Windows Start Button
• Left click on “Run”
• Type compmgmt.msc and left click on “OK”
• Left click on “Disk Management”.
3. Verify USB flash drive capacity is 2 GB or less
4. Right click on the USB flash drive, then left click
on “Format” from the drop down list.
5. Verify or select the settings below:
• Volume Label is Optional - Rename if desired
• File System - Fat32
• Allocation Unit Size must be 512 MB
• Deselect “Perform A Quick Format” (no
checkmark)
6. Left click on “OK” you will receive a warning “Formatting will remove all data” left click on “OK”,
wait until formatting is complete and “status”
indicates “Healthy”, then close the disk
management window.
Part Number STH025 7/11
91
UPGRADING FIRMWARE WITH A FLASH DRIVE
OR TRANSFERRING SETUP DATA TO MULTIPLE
MACHINES
Important
The flash drive must be formatted before using,
All files and software on the flash drive are
removed during the formatting process. Refer to
page 88 USB Flash Drive Specifications and
Formatting.
1. Drag and drop the files from your email onto a
flash drive or refer to Exporting data to a flash
drive to transfer settings to multiple machines.
2. Ensure that the ice machine’s power is on.
3. Press the Menu button.
4. Press the Down arrow until Service is highlighted.
5. Press the Checkmark. The Service menu will be
displayed.
USB Setup
USB Stick
Download Frm
6. Press the Down arrow until USB Setup is
highlighted.
7. Press the Checkmark. USB Stick will appear
highlighted.
8. Press the Checkmark again. A submenu with
Download Frm (Download Firmware) appears.
9. Ensure that Download Frm is highlighted and
press the Checkmark. A display of instructions will
appear.
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Part Number STH025 7/11
Bin Switches
Bin
Thermostat
USB
Display Light
Micro Light
Clean Light
Harvest Light
SL-1 Light
SL-2 Light
Thermistors
T1
T2
Dump Valve
T3
T4
USB Connector
Left Bin Switch Light
Transformer
Right Bin Switch Light
Water Level Probe Light
Display
Ice Thickness Probe Light
RS485
RT Harvest
Bin LED
LuminIce
Battery
Compressor
LT Harvest
Water
Level
Probe
Fuse
Relay Lights
Pump
Control Board
10. Follow the on-screen instructions:
A. Insert Drive (Insert the flash drive into the
USB port on the ice machine’s control board.)
B. Press Check (Press the Checkmark.)
C. Wait For Comp (Wait approximately 5 to 10
minutes for the Firmware upgrade to
complete.
11. Upgrade Complete will appear on the display
12. Verify the new firmware version loaded by
navigating to Menu/Machine information/Main
Software Version and verify the firmware version
number.
Part Number STH025 7/11
93
EXPORTING DATA TO A FLASH DRIVE
Data can be copied from the control board memory to
a flash drive and used to transfer setup and/or cycle
data to a replacement control board or to transfer
setup information to multiple ice machines. Data may
also be requested by service department personnel for
analysis or as an aid to troubleshooting. The data files
are small and can be attached to an email.
Important
The flash drive must be formatted before using,
Refer to page 88 USB Flash Drive Specifications
and Formatting.
1.
2.
3.
4.
Ensure that the ice machine’s power is on.
Press the Menu button.
Press the Down arrow until Service is highlighted.
Press the Checkmark. The Service menu will be
displayed.
USB Setup
USB Stick
Export All
5. Press the Down arrow until USB Setup is
highlighted.
6. Press the Checkmark. USB Stick will appear
highlighted.
7. Press the Checkmark again. A submenu with
Export ALL and Export Setup appears.
8. Highlight Export ALL or Export Setup, depending
on your requirements, and press the Checkmark.
A display of instructions will appear.
9. Follow these on-screen instructions to:
A. Insert Drive (Insert the flash drive into the
USB port on the ice machine’s control board.)
B. Press Check (Press the Checkmark.)
C. Wait For Comp (Wait approximately 5 to 10
minutes for the download to complete.
D. Export Complete will appear on the display.
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Part Number STH025 7/11
SAFE OPERATION MODE
Allows the ice machine to operate up to 72 hours if the
ice thickness probe (E19 fault) and/or water level
probe sensors fail (E20 fault).
• When the control board starts the safe mode an
alert is flashed on the LCD display to notify the
end-user they have a production problem.
• The control board automatically initiates and
monitors the safe mode. The control will
automatically exit the safe mode if a normal signal
is received from the input.
• After 72 hours the control board will enter a
standby mode and turn off
NOTE: The control board needs a five cycle history to
operate safe mode. If five cycles have never been
successfully completed the ice machine will shut-off.
• Example - The ice machine is a new installation
and the water has not been turned on. The ice
machine will stop after five cycles with five long
freeze cycles and five water system faults in the
event log.
Part Number STH025 7/11
95
Operational Checks
GENERAL
Manitowoc ice machines are factory-operated and
adjusted before shipment. Normally, new installations
do not require any adjustment.
To ensure proper operation, always follow the
Operational Checks:
• when starting the ice machine for the first time
• after a prolonged out of service period
• after cleaning and sanitizing
NOTE: Routine adjustments and maintenance
procedures are not covered by the warranty.
Important
Refrigeration compressors must be operated
for a minimum break in period of 72 hours
before full ice production will be reached.
96
Part Number STH025 7/11
ICE THICKNESS CHECK
After a harvest cycle, inspect the ice cubes in the ice
storage bin. The ice thickness probe is factory-set to
maintain the ice bridge thickness at 1/8" (3 mm).
NOTE: Make sure the water curtain is in place when
performing this check. It prevents water from splashing
out of the water trough.
1. Inspect the bridge connecting the cubes. It should
be about 1/8" (3 mm) thick.
2. If adjustment is necessary, turn the ice thickness
probe adjustment screw clockwise to increase
bridge thickness, counterclockwise to decrease
bridge thickness. As a starting point place a 9/32"
(7 mm) drill bit between the ice thickness probe
and the evaporator. Make final adjustments to
achieve a 1/8" (3 mm) thick bridge.
NOTE: Turning the adjustment 1/3 of a turn will
change the ice thickness about 1/16" (1.5 mm).
1/8" (3 mm)
ICE BRIDGE THICKNESS
PLACE 9/32” DRILL BIT
HERE TO SET INTIAL
Ice Thickness Check
3. Make sure the ice thickness probe wire doesn’t
restrict movement of the probe.
Part Number STH025 7/11
97
Sequence of Operation
SELF CONTAINED AIR OR WATER COOLED
NOTE: The power button must be depressed and the
water curtain/ice dampers must be in place on the
evaporator before the ice machine will start.
Initial Start-Up or Start-Up After
Automatic Shut-Off
1. Water Purge
Before the refrigerant compressor starts, the water
pump and water dump solenoid energize to purge the
ice machine of old water. This feature ensures that the
ice making cycle starts with fresh water.
2. Refrigeration System Equalization and
Start-Up
The harvest valve(s) and air pump(s) energize to
equalize high and low side refrigeration pressure.
After 5 seconds the contactor energizes the
compressor and supplies power to the condenser fan
motor. After 5 seconds the harvest valve(s) and air
pump(s) de-energize.
NOTE: The fan motor is wired through a fan cycle
pressure control and will cycle on and off when the
room temperatures is below 70°F (21°C).
98
Part Number STH025 7/11
Freeze Sequence
3. Prechill
The compressor lowers the temperature of the
evaporator(s) before the water pump is energized. The
water fill valve will energize and remain on until water
completes the water level probe circuit.
4. Freeze
The water pump(s) energizes and water flows over the
evaporator. After water contacts the water level probe
the water fill valve de-energizes. The control board will
automatically cycle the water fill valve within the 6
minute water fill time limit. The valve energizes once in
the pre-chill and up to twice in the freeze cycle.
The freeze cycle continues until the six minute freeze
lock expires and enough ice has formed to send a
signal from the ice thickness probe to the control
board.
Harvest Sequence
5. Water Purge
The air pump(s) (when used) and the harvest valve(s)
open at the beginning of the water purge to divert hot
refrigerant gas into the evaporator.
The water pump(s) continues to run, and the water
dump valve energizes to purge the water in the water
trough.
6. Harvest
The air pump (when used) remains energized and the
harvest valve(s) remains open. 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 opens the water curtain/ice
damper and 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 (Step 3 - 4.)
Part Number STH025 7/11
99
Automatic Shut-Off
7. Automatic Shut-Off
When the storage bin is full at the end of a harvest
sequence, the sheet of cubes fails to clear the water
curtain/ice damper and will hold it open. After the
water curtain/ice damper is held open for 30 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 water curtain or all of the ice dampers. As
the water curtain/ice dampers swing back to the
closed position, the bin switch re-closes and the ice
machine restarts (steps 1 - 2), provided the 3 minute
delay period is complete.
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.
This can be overridden by initiating a manual
harvest. Refer to “Manual Harvest” on page 84
• The maximum freeze time is 60 minutes at which
time the control board automatically initiates a
harvest sequence.
• The maximum harvest time is 3.5 minutes. The
control board automatically initiates a freeze
sequence when these times are exceeded.
• The maximum water fill is 6 minutes.
100
Part Number STH025 7/11
Part Number STH025 7/11
Single Evaporator Self Contained Air & Water-Cooled Models
Energized Parts Chart
Ice Making
Sequence of
Operation
Water
Pump
Harvest
Valve(s)
Air
Pump(s)*
Water
Inlet
Valve
Water
Dump
Valve
Contactor
Coil
Compressor
Condenser
Fan Motor
Length
of Time
On
Off
Off
Off
On
Off
Off
Off
45 Seconds
Off
On
On
Off
Off
Off
Off
Off
5 Seconds
Off
On
On
Off
Off
On
On
On
5 Seconds
Off
On
On
May Cycle
Initial Start-Up is
60 Seconds
Start-Up
1. Water Purge
2. Refrigeration
System Start-up
Freeze Sequence
3. Prechill
May
Cycle
Off
Off
Off
On/Off
during
pre-chill
4. Freeze
On
Off
Off
Cycles
Off then
On two
more
times
Off
On
On
On/Off
May Cycle
On/Off
30 Seconds thereafter
Until Ice Contact
w/Ice Thickness Probe
101
102
Single Evaporator Self Contained Air & Water-Cooled Models
Energized Parts Chart (Continued)
Ice Making
Sequence of
Operation
Water
Pump
Harvest
Valve(s)
Air
Pump(s)*
Water
Inlet
Valve
Water
Dump
Valve
Contactor
Coil
Compressor
On
On
On
Off
On
On
On
6. Harvest
Off
On
On
Off
Off
On
On
7. Automatic
Shut-Off
Off
Off
Off
Off
Off
Off
Off
Harvest Sequence
5. Water Purge
Part Number STH025 7/11
* NOT USED ON ALL MODELS
Condenser
Fan Motor
Length
of Time
May Cycle
Factory
Set at
45 Seconds
On/Off
May Cycle
On/Off
Bin Switch
Activation
Off
Until 3 Minute Delay
Expires and Bin Switch
Re-closes
REMOTE CONDENSER
Single Evaporator Models
NOTE: The power button must be depressed and the
water curtain/ice dampers must be in place on the
evaporator before the ice machine will start.
Initial Start-Up or Start-Up After
Automatic Shut-Off
1. Water Purge
Before the compressor starts, the water pump and
water dump solenoid are energized for 45 seconds, to
completely purge the ice machine of old water. This
feature ensures that the ice making cycle starts with
fresh water.
2. Refrigeration System Start-Up
The harvest valve, air pump and harvest pressure
regulating (HPR) solenoid valves energize to equalize
high and low side refrigeration pressure.
After 5 seconds the liquid line solenoid valve
energizes and the contactor energizes the compressor
and condenser fan motor.
Freeze Sequence
3. Prechill
The compressor is on for 30 seconds (60 seconds
initial cycle) prior to water flow, to prechill the
evaporator. The water fill valve is also energized and
will remain on until water completes the water level
probe circuit.
4. Freeze
The water pump(s) energizes and water flows over the
evaporator. After water contacts the water level probe
the water fill valve de-energizes. The control board will
automatically cycle the water fill valve within the 6
minute water fill time limit. The valve energizes once in
the pre-chill and up to twice in the freeze cycle.
The freeze cycle continues until the six minute freeze
lock expires and enough ice has formed to send a
signal from the ice thickness probe to the control
board.
Part Number STH025 7/11
103
Harvest Sequence
5. Water Purge
The air pump (when used) the harvest valve(s) and
harvest pressure regulating valve (HPR) open at the
beginning of the water purge to divert hot refrigerant
gas to the evaporator.
The water pump continues to run, and the water dump
valve energizes to purge the water in the water trough.
6. Harvest
The HPR valve, air pump and harvest valve(s)
remains open and 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 opens the water curtain/ice damper
and bin switch. The momentary opening and reclosing of the bin switch terminates the harvest
sequence and returns the ice machine to the freeze
sequence (Step 3 - 4.)
Automatic Shut-Off
7. Automatic Shut-Off
When the storage bin is full at the end of a harvest
sequence, the sheet of cubes fails to clear the water
curtain/ice damper and will hold it open. After the
water curtain/ice damper is held open for 30 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 drop
clear of the water curtain/ice damper. As the water
curtain/ice damper closes the bin switch the ice
machine restarts (steps 1 - 2) provided the 3 minute
delay period is complete.
104
Part Number STH025 7/11
Part Number STH025 7/11
Single Evaporator Remote Air-Cooled Condenser Models
Energized Parts Chart
Ice Making
Sequence of
Operation
Water
Pump
Harvest
Valve
(Left)
HPR
Valve
Harvest
Valve
(Right)
(When
Used)
Air
Pump
(When
Used)
Water
Inlet
Valve
Water
Dump
Valve
Contactor
Coil
Liquid Line
Solenoid
Compressor
Condenser
Fan Motor
Length
of Time
On
Off
Off
Off
Off
On
Off
Off
Off
45 Seconds
Off
On
On
On
Off
Off
Off
Off
Off
5 Seconds
Off
On
On
On
Off
Off
On
On
On
5 Seconds
Off
May
Cycle
On/Off
during
pre-chill
Off
On
On
On
Off
Cycles
Off
Then On
Two
more
times
Off
Initial Start-Up
1. Water Purge
2. Refrigeration
System Startup
Freeze Sequence
Off
Off
Off
3. Prechill
4. Freeze
On
Off
Off
Initial Start-Up is
60 Seconds
30 Seconds thereafter
On
On
On
Until Ice Contact
with Ice Thickness
Probe
105
106
Single Evaporator Remote Air-Cooled Condenser Models
Energized Parts Chart (Continued)
Water
Pump
Harvest
Valve
(Left)
HPR
Valve
Harvest
Valve
(Right)
(When
Used)
Air
Pump
(When
Used)
Water
Inlet
Valve
Water
Dump
Valve
Contactor
Coil
Liquid Line
Solenoid
Compressor
Condenser
Fan Motor
Length
of Time
On
On
On
On
Off
On
On
On
On
Factory
Set at
45 Seconds
6. Harvest
Off
On
On
On
Off
Off
On
On
On
Bin Switch
Activation
7. Automatic
Shut-Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Until 3 Minute Delay
Expires and Bin
Switch
Re-closes
Ice Making
Sequence of
Operation
Harvest Sequence
5. Water Purge
Part Number STH025 7/11
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Part Number STH025 7/11
107
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108
Part Number STH025 7/11
Troubleshooting
Safety Limits
In addition to standard safety controls, the control
board has built in safety limit controls which protect the
ice machine from major component failures.
Safety limits are stored and indicated by the control
board after three cycles. The number of cycles
required to stop the ice machine varies for each safety
limit.
• Safety Limit 1 all models - If the freeze time
reaches 60 minutes, the control board
automatically initiates a harvest cycle. If 6
consecutive 60-minute freeze cycles occur, the ice
machine stops
• Safety Limit 2 single evaporator models - If the
harvest time reaches 3.5 minutes, the control
board automatically returns the ice machine to the
freeze cycle. If 500 consecutive 3.5 minute harvest
cycles occur, the ice machine stops.
Part Number STH025 7/11
109
ANALYZING WHY A SAFETY LIMIT STOPPED THE
ICE MACHINE
Safety limits are designed to stop the ice machine prior
to major component failures, most often a minor
problem or something external to the ice machine.
This may be difficult to diagnose, as many external
problems occur intermittently.
Example: An ice machine stops intermittently on safety
limit #1 (long freeze times). The problem could be a
low ambient temperature at night, a water pressure
drop, the water is turned off one night a week, etc.
Refrigeration and electrical component failures will
cause a safety limit trip. Eliminate all electrical
components and external causes first. If it appears
that the refrigeration system is causing the problem,
use Manitowoc’s Freeze Cycle Refrigeration System
Operational Analysis Table, along with detailed charts,
checklists, and other references to determine the
cause.
The following checklists are designed to assist the
service technician in analysis. However, because
there are many possible external problems, do not
limit your diagnosis to only the items listed.
110
Part Number STH025 7/11
SAFETY LIMIT #1
Freeze time exceeds 60 minutes for 6 consecutive
freeze cycles.
Possible cause list
Water System
• Dirty/defective water level probe
• Low water pressure (20 psig min.)
• High water pressure (80 psig max.)
• High water temperature (90°F/32.2°C max.)
• Clogged water distribution tube
• Dirty/defective water fill valve
• Dirty/defective water dump valve
• Defective water pump
• Loss of water from sump area
Electrical System
• Low incoming voltage
• Ice thickness probe out of adjustment
• Harvest cycle not initiated electrically
• Contactor not energizing
• Compressor electrically non-operational
• Defective fan cycling control
• Defective fan motor
Miscellaneous
• Non-Manitowoc components
• Improper refrigerant charge
• Defective head pressure control
• Defective harvest valve
• Defective compressor
• TXV starving or flooding (check bulb mounting)
• Non-condensable in refrigeration system
• Plugged or restricted high side refrigerant lines or
component
• Restricted air flow/dirty condenser fins
• High inlet air temperature
• Condenser discharge air recirculation
Part Number STH025 7/11
111
SAFETY LIMIT #2
Harvest time exceeds 3.5 minutes for 500 consecutive
harvest cycles
Possible Cause Checklist
Improper Installation
• Refer to “Installation/Visual Inspection Checklist”
page 131
Water System
• Water area (evaporator) dirty
• Dirty/defective water dump valve
• Vent tube not installed on water outlet drain
• Water freezing behind evaporator
• Plastic extrusions and gaskets not securely
mounted to the evaporator
• Low water pressure (20 psig min.)
• Loss of water from sump area
• Clogged water distribution tube
• Dirty/defective water fill valve
• Defective water pump
Electrical System
• Ice thickness probe out of adjustment
• Ice thickness probe dirty
• Bin switch closed/defective
• Premature harvest
Refrigeration System
• Non-Manitowoc components
• Improper refrigerant charge
• Defective head pressure control valve
• Defective harvest valve
• TXV flooding (check bulb mounting)
• Defective fan cycling control
• Water cooled only - Water inlet valve is incorrectly
adjusted or will not close during harvest cycle.
112
Part Number STH025 7/11
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Part Number STH025 7/11
113
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114
Part Number STH025 7/11
Troubleshooting By Symptom
The troubleshooting procedures follow flow charts.
There are four symptoms, the symptom that you are
experiencing will determine which flow chart to use.
The flow chart asks yes and no questions to determine
the problem. The flow chart will direct you to a
procedure to correct the problem. Remote condenser,
and self contained models use separate charts.
SYMPTOM #1
Ice Machine Stops Running
Ice machine is in Ice Making cycle
or
Has a History of Shutting Down
• Refer to Ice Machine Stops Running Flow Chart
SYMPTOM #2
Ice Machine has a Long Freeze Cycle.
Ice Formation is Thick
or
Thin Ice Fill on Top or Bottom of Evaporator
or
Low Production
Safety Limit #1 (possible)
• Refer to Freeze Cycle Refrigeration System
Operational Analysis Table
SYMPTOM #3
Ice Machine Will Not Harvest - Freeze Cycle is
Normal and Ice Cubes are Not Melted After Harvest
Safety Limit #2 (possible)
• Refer to Refrigeration Harvest Flow Chart
Symptom #4
Ice Machine Will Not Harvest - Freeze Cycle is
Normal and Ice Cubes are Melted After Harvest
• Refer to Ice Meltout Flow Chart
Part Number STH025 7/11
115
Reset To Factory Defaults
Before starting troubleshooting procedures, reset the
control board to factory defaults to prevent
misdiagnosis. Before resetting to factory defaults do
one of the following:
A. Copy settings to a usb device and flash
settings into the control board when
diagnostics are complete.
B. Write down any customer settings so they
can be re-entered when diagnostics are
complete.
This procedure also resets the password to the factory
default. The default factory password is 1234. To reset
the ice machine to factory defaults use the following
procedure.
1. Ensure that the ice machine’s power is on.
2. Press the Menu button.
3. From the Main menu, use the Down button to
highlight Fact Deflts
4. Press either the Checkmark or right arrow two
times to reset the ice machine. The display will
return to the Set-Up menu and the defaults listed
below will be in affect. Refer to Setup to adjust
settings.
Setting
Language
Time/Date
Time Configuration
Units
Ice Clarity
LCD Brightness
Password On
Edit Password
Clean Minder
AuCS RunTime
Air Filter Minder
Water Filter Minder
116
Default
English
Month/Day/Year/Time
Mo/Day/Yr/24 Hour
Fahrenheit/Lbs/Gallons
Off
Level 2
Off - Enter Password
Default Password = 1234
Off - Edit password
Off
Off
Off
Off
Part Number STH025 7/11
Part Number STH025 7/11
SYMPTOM #1 ICE MACHINE WILL NOT RUN
Ice Machine Stops Running or Has a History of Shutting Down
START
NO
Does ice machine run in CLEAN?
NO
Refer to
“Diagnosing an
Ice Machine that Will Not Run”
YES
Control board has
energized lights?
NO
YES
Does the
ice machine start when toggle switch is
moved to ICE?
YES
Continued on Next Page...
117
118
Yes
Yes
Control board fuse
is good?
Display light
flashing
heartbeat?
Yes
No
Refer to display & control
board diagnostics
No
Yes
Install the water curtain/damper.
Replace fuse & determine which
component caused fuse to blow
Refer to display & control
board diagnostics
No
Part Number STH025 7/11
Bin switch light on?
(Multi evap all lights on?)
Yes
No
All water curtains or
dampers in place?
Yes
Part Number STH025 7/11
Yes
Yes
No
Press power button to
start ice making, does safety
limit light flash?
Is magnet on the
water curtain/damper
Yes
No
Refer to display & control
board diagnostics
Ice machine starts?
Yes
Yes
Which light flashes?
Test run ice machine
SL1
SL2
No
Replace the water
curtain/damper.
Refer to bin switch
diagnostics.
Refer to Safety Limit #1 long freeze cycle
Refer to Safety Limit #2 long harvest cycle
119
Diagnosing an Ice Machine That Will Not Run
! Warning
High (line) voltage is applied to the control board
(terminals #55 and #56) at all times. Removing
control board fuse or pressing the power button will
not remove the power supplied to the control board.
1. Verify primary voltage is supplied to ice machine
and the fuse/circuit breaker is closed.
2. Verify the high pressure cutout is closed.
3. Verify control board fuse is okay. If the micro or
display lights on the control board are energized
the fuse is okay.
4. Verify all bin switches function properly. A
defective bin switch can falsely indicate a full bin
of ice.
5. Perform control board, display board and touch
screen diagnostics. Be sure steps 1-6 were
followed thoroughly. Intermittent problems are not
usually related to the control board.
120
Part Number STH025 7/11
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Part Number STH025 7/11
121
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122
Part Number STH025 7/11
SYMPTOM #2 - SELF-CONTAINED AIR, WATER &
REMOTE CONDENSER MODELS
Symptom #2 Low Production, Long Freeze
Ice Machine has a Long Freeze Cycle.
Ice Formation is Thick
or
Thin on Top or Bottom of Evaporator
or
Low Production
How to Use the Freeze Cycle Refrigeration System
Operational Analysis Table
GENERAL
These tables must be used with charts, checklists and
other references to eliminate refrigeration components
not listed on the tables and external items and
problems which can cause good refrigeration
components to appear defective.
The tables list five different defects that may affect the
ice machine’s operation.
NOTE: A low-on-charge ice machine and a starving
expansion valve have very similar characteristics and
are listed under the same column.
NOTE: Before starting, see “Before Beginning
Service” for a few questions to ask when talking to the
ice machine owner.
Part Number STH025 7/11
123
PROCEDURE
Step 1 Complete the “Operation Analysis”
column.
Read down the left “Operational Analysis” column.
Perform all procedures and check all information
listed. Each item in this column has supporting
reference material to help analyze each step.
While analyzing each item separately, you may find an
“external problem” causing a good refrigerant
component to appear bad. Correct problems as they
are found. If the operational problem is found, it is not
necessary to complete the remaining procedures.
Step 2 Enter Checkmarks ().
Each time the actual findings of an item in the
“Operational Analysis” column matches the published
findings on the table, enter a Checkmark.
Example: Freeze cycle suction pressure is determined
to be low. Enter a Checkmark in the “low” column.
Step 3 Add the Checkmarks listed under each of
the four columns. Note the column number with
the highest total and proceed to “Final Analysis.”
NOTE: If two columns have matching high numbers,
a procedure was not performed properly, supporting
material was not analyzed correctly or the problem
component is not covered by the analysis table.
124
Part Number STH025 7/11
Part Number STH025 7/11
SYMPTOM #2 - FREEZE CYCLE REFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLES
SINGLE EXPANSION VALVE SELF CONTAINED AIR, WATER & REMOTE CONDENSER
Operational Analysis
Ice Production
Installation and Water
System
Ice Formation Pattern
125
Freeze Cycle
Discharge Pressure
_______ ______ ______
1 minute Middle
End
into cycle
1
2
3
4
Air-Temperature Entering Condenser_____________
Water Temperature Entering Ice Machine_________
Published 24 hour ice production________________
Calculated (actual) ice production_______________
NOTE: The ice machine is operating properly if the ice fill patterns is normal and ice
production is within 10% of charted capacity.
All installation and water related problems must be corrected before proceeding with chart.
Ice formation is extremely
thin on outlet of
evaporator
-orNo ice formation on the
entire evaporator
Ice formation is
extremely thin on outlet
of evaporator
-orNo ice formation on
entire evaporator
Ice formation normal
-orIce formation is
extremely thin on inlet of
evaporator
-orNo ice formation on
entire evaporator
Ice formation normal
-orNo ice formation on
entire evaporator
If discharge pressure is High or Low refer to freeze cycle high or low discharge pressure problem checklist
page 135 to eliminate problems and/or components not listed on this table before proceeding.
126
SINGLE EXPANSION VALVE SELF CONTAINED AIR, WATER & REMOTE CONDENSER
Operational Analysis
1
2
3
4
If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist
Freeze Cycle
page 138 to eliminate problems and/or components not listed on this table before proceeding.
Suction Pressure
Suction pressure is
Suction pressure is
Suction pressure is
_______ ______ _____
Suction pressure is High
Low or Normal
High
High
1 minute
Middle
End
Wait 5 minutes into the
freeze cycle.
Compare temperatures of
evaporator inlet and
evaporator outlet.
Part Number STH025 7/11
Inlet _____________° F (°C)
Outlet ___________ ° F (°C)
Difference________ ° F (°C)
Inlet and outlet
within 7° F (4°C)
of each other
Inlet and outlet
not within 7° F (4°C)
of each other
-andInlet is colder than
outlet
Inlet and outlet
within 7°F (4°C)
of each other
-orInlet and outlet
not within 7°F (4°C)
of each other
-andInlet is warmer than
outlet
Inlet and outlet
within 7°F (4°C)
of each other
Part Number STH025 7/11
SINGLE EXPANSION VALVE SELF CONTAINED AIR, WATER & REMOTE CONDENSER
Operational Analysis
1
2
3
4
Wait 5 minutes into the
freeze cycle.
Compare temperatures of
compressor discharge line
and harvest valve inlet.
The harvest valve inlet is
Hot
-andapproaches the
temperature of a Hot
compressor discharge
line.
The harvest valve inlet
is Cool enough to hold
hand on
-andthe compressor
discharge line is Hot.
The harvest valve inlet
is Cool enough to hold
hand on
-andthe compressor
discharge line is Cool
enough to hold hand on.
The harvest valve inlet
is Cool enough to hold
hand on
-andthe compressor
discharge line is Hot.
Discharge line temp.
150°F (65°C)
or higher at the end of the
freeze cycle
Discharge line temp.
150°F (65°C)
or higher at the end of
the freeze cycle
Discharge line temp.
less than
150°F (65°C) at the end
of the freeze cycle
Discharge line temp.
150°F (65°C) or higher
at the end of the freeze
cycle
Harvest Valve
Leaking
Low On Charge
-OrTXV Starving
TXV Flooding
Compressor
Discharge Line
Temperature
Record freeze cycle
discharge line temperature at
the end of the freeze cycle
_________°F (°C)
Final Analysis
Enter total number of boxes
checked in each column.
127
The following are the procedures for completing each step of the Freeze Cycle Refrigeration System Operational
Analysis Tables. Each procedure must be performed exactly for the table to work correctly.
Before Beginning Service
Ice machines may experience operational problems
only during certain times of the day or night. A machine
may function properly while it is being serviced, but
malfunctions later. Information provided by the user
can help the technician start in the right direction, and
may be a determining factor in the final diagnosis.
Ask these questions before beginning service:
• When does the ice machine malfunction? (night,
day, all the time, only during the Freeze cycle, etc.)
• When do you notice low ice production? (one day
a week, every day, on weekends, etc.)
• Can you describe exactly what the ice machine
seems to be doing?
• Has anyone been working on the ice machine?
• During “store shutdown,” is the circuit breaker,
water supply or air temperature altered?
• Is there any reason why incoming water pressure
might rise or drop substantially?
128
Part Number STH025 7/11
Ice Production Check
The amount of ice a machine produces directly relates to
the operating water and air temperatures. This means a
condensing unit with a 70°F (21°C) outdoor ambient
temperature and 50°F (10°C) water produces more ice
than the same model condensing unit with a 90°F
(32°C) outdoor ambient temperature and 70°F (21°C)
water.
1. Determine the ice machine operating conditions:
Air temp entering condenser:____°
Air temp around ice machine:____°
Water temp entering sump trough:____°
2. Refer to the appropriate 24-Hour Ice Production
Chart (starting on page 225). Use the operating
conditions determined in step 1 to find published
24-Hour Ice Production:_____
• Times are in minutes.
Example: 1 min. 15 sec. converts to 1.25 min.
(15 seconds ÷ 60 seconds = .25 minutes)
• Weights are in pounds.
Example: 2 lb. 6 oz. converts to 2.375 lb.
(6 oz. ÷ 16 oz. = .375 lb.)
3. Perform an ice production check using the
formula below.
1.
_________
Freeze Time
+
_________
Harvest Time
=
_________
Total Cycle
Time
2.
1440
_________
Minutes in
24 Hrs.
÷
_________
Total Cycle
Time
=
_________
Cycles per
Day
3.
_________
Weight of
One Harvest
×
_________
Cycles per
Day
=
_________
Actual 24Hour
Production
Part Number STH025 7/11
129
Weighing the ice is the only 100% accurate check.
However, if the ice pattern is normal and the
1/8 in. thickness is maintained, the ice slab weights
listed with the 24-Hour Ice Production Charts may be
used.
4. Compare the results of step 3 with step 2. Ice
production checks that are within 10% of the chart
are considered normal. If they match closely,
determine if:
• Another ice machine is required.
• More storage capacity is required.
• Relocating the existing equipment to lower the
load conditions is required.
Contact the local Manitowoc Distributor for information
on available options and accessories.
130
Part Number STH025 7/11
Installation/Visual Inspection Checklist
Inadequate Clearances
• Check all clearances on sides, back and top.
Ice machine is not level
• Level the ice machine
Condenser is dirty
• Clean the condenser
Water filtration is plugged (if used)
• Install a new water filter
Water drains are not run separately and/or are not
vented
• Run and vent drains according to the Installation
Manual
Line set is improperly installed
• Reinstall according to the Installation Manual
Part Number STH025 7/11
131
Water System Checklist
A water-related problem often causes the same
symptoms as a refrigeration system component
malfunction.
Water system problems must be identified and
eliminated prior to replacing refrigeration components.
Water area (evaporator) is dirty
• Clean as needed
Water inlet pressure not between 20 and 80 psig
(1-5 Bar, 138-552 kPa).
• Install water regulator or increase water pressure
Incoming water temperature is not between 35°F
(2°C) and 90°F (32°C)
• If too hot, check the hot water line check valves in
other store equipment
Water filtration is plugged (if used)
• Install a new water filter
Water dump valve leaking during the Freeze cycle
• Clean/replace dump valve as needed
Vent tube is not installed on water outlet drain
• See Installation Instructions
Hoses, fittings, etc., are leaking water
• Repair/replace as needed
Water fill valve is stuck open or closed
• Clean/replace as needed
Water is leaking out of the sump trough area
• Stop the water loss
Uneven water flow across the evaporator
• Clean the ice machine
Plastic extrusions and gaskets are not secured to
the evaporator
• Remount/replace as needed
132
Part Number STH025 7/11
Ice Formation Pattern
Evaporator ice formation pattern analysis is helpful in
ice machine diagnostics.
Analyzing the ice formation pattern alone cannot
diagnose an ice machine malfunction. However, when
this analysis is used along with Manitowoc’s Freeze
Cycle Refrigeration System Operational Analysis
Tables, it can help diagnose an ice machine
malfunction.
Any number of problems can cause improper ice
formation.
Important
Keep the water curtain/ice dampers in place while
checking the ice formation pattern to ensure no
water is lost.
1. Normal Ice Formation
Ice forms across the entire evaporator surface.
At the beginning of the Freeze cycle, it may appear
that more ice is forming on the inlet of the evaporator
than on the outlet. At the end of the Freeze cycle, ice
formation at the outlet will be close to, or just a bit
thinner than, ice formation at the inlet. The dimples in
the cubes at the outlet of the evaporator may be more
pronounced than those on the inlet. This is normal.
It is normal for ice thickness to vary up to 1/16" across
the surface of the evaporator. The ice bridge thickness
at the ice thickness control probe should be at least
1/8".
The ice thickness probe must be set to maintain the
ice bridge thickness at approximately 1/8 in. If ice
forms uniformly across the evaporator surface, but
does not reach 1/8 in. in the proper amount of time,
this is still considered a normal ice fill pattern.
Part Number STH025 7/11
133
2. Extremely Thin at Evaporator Outlet
There is no ice, or a considerable lack of ice formation,
at the outlet of the evaporator.
Examples: No ice at all on the outlet half of the
evaporator, but ice forms on the inlet half of the
evaporator. Or, the ice at the outlet of the evaporator
reaches 1/8 in. to initiate a harvest, but the inlet of the
evaporator already has 1/2 in. to 1 in. of ice formation.
3. Extremely Thin at Evaporator Inlet
There is no ice, or a considerable lack of ice formation
at the inlet of the evaporator. Examples: The ice at the
outlet of the evaporator reaches 1/8 in. to initiate a
harvest, but there is no ice formation at all on the inlet
of the evaporator.
4. No Ice Formation
The ice machine operates for an extended period, but
there is no ice formation at all on the evaporator.
Evaporator Tubing Routing
Routing of the tubing on the back of the evaporator
determines the ice fill pattern failure mode. The
evaporator outlet tubing does not exit directly at the
top of the evaporator, but exits several inches below
the top of the evaporator. Extremely Thin at the
Evaporator Outlet will first be visible several inches
below the top of the evaporator. Extremely Thin at
Evaporator Inlet will first be visible at the bottom of the
evaporator.
Outlet
ICE
ICE
Inlet
Thin at Inlet
134
Thin at Outlet
Part Number STH025 7/11
Analyzing Discharge Pressure in the Freeze Cycle
1. Determine the ice machine operating conditions:
Air temp. entering condenser______
Air temp. around ice machine______
Water temp. entering sump trough______
2. Refer to Operating Pressure table (starting on
page 225) for ice machine being checked.
Use the operating conditions determined in step 1
to find the published normal discharge pressures.
Freeze Cycle______
Harvest Cycle______
3. Perform an actual discharge pressure check.
Freeze Cycle
psig (kPa)
1 Minute into the
Freeze Cycle
__________
Middle of Freeze Cycle
__________
End of Freeze Cycle
__________
4. Compare the actual discharge pressure (step 3)
with the published discharge pressure (step 2).
The discharge pressure is normal when the actual
pressure falls within the published pressure range
for the ice machine’s operating conditions. It is
normal for the discharge pressure to be higher at
the beginning of the Freeze cycle (when load is
greatest), then drop throughout the Freeze cycle.
Part Number STH025 7/11
135
FREEZE CYCLE DISCHARGE PRESSURE
HIGH CHECKLIST
Improper Installation
• Refer to “Installation/Visual Inspection Checklist”
(page 131)
Air Condenser
• Dirty condenser filter
• Dirty condenser fins
• High inlet air temperature
• Condenser discharge air recirculation
• Defective fan cycling control (page 182)
• Defective fan motor
• Defective head pressure control valve {Remote}
Water Condenser
• Low water pressure [20 psig (138 kPa) min.]
• High inlet water temperature (90°F/32°C max.)
• Dirty condenser
• Dirty/Defective water regulating valve
• Water regulating valve out of adjustment
Other
• Overcharged
• Non-condensable (air) in system
• Wrong type of refrigerant
• Non-Manitowoc components in system
• High side refrigerant lines/component restricted
136
Part Number STH025 7/11
FREEZE CYCLE DISCHARGE PRESSURE
LOW CHECKLIST
Improper Installation
• Refer to “Installation/Visual Inspection Checklist”
(page 131)
Air Cooled Condensers
• Defective head pressure control valve, won’t
bypass (page 195)
• Defective fan cycle control, stuck closed
(page 182)
Water Cooled Condensers
• Water Regulating Valve out of adjustment
• Water Regulating Valve Defective
Other
• Undercharged
• Wrong type of refrigerant
• Non-Manitowoc components in system
• Liquid line/component restricted
Part Number STH025 7/11
137
Analyzing Suction Pressure
The suction pressure gradually drops throughout the
freeze cycle. The actual suction pressure (and drop
rate) changes as the air and water temperature
entering the ice machine changes. These variables
also determine the freeze cycle times.
To analyze and identify the proper suction pressure
drop throughout the freeze cycle, compare the
published suction pressure to the published freeze
cycle time.
NOTE: Analyze discharge pressure before analyzing
suction pressure. High or low discharge pressure may
be causing high or low suction pressure.
Procedure
Step
1. Determine the ice machine operating
conditions. *Temperature of air entering the
condenser. Look up and determine the
published suction pressure.
2. Perform an actual suction pressure check at the
beginning, middle and end of the Freeze cycle.
*Freeze cycle begins when the water pump
starts
3. Compare the actual Freeze cycle suction
pressure (step 2) to the published Freeze cycle
pressure. Determine if the suction pressure is
high, low or normal.
138
Part Number STH025 7/11
Suction Pressure High Checklist
Improper Installation
• Refer to “Installation/Visual Inspection Checklist”
page 131
Discharge Pressure
• Discharge pressure is too high and is affecting
suction pressure – refer to “Freeze Cycle
Discharge Pressure High Checklist” (page 136)
Improper Refrigerant Charge
• Overcharged (also see “Freeze Cycle Discharge
Pressure High Checklist” page 136)
• Wrong type of refrigerant
• Non condensable in system
Components
• Harvest valve leaking - continue the table
• Harvest pressure solenoid valve leaking - continue
the table
• TXV flooding - continue the table
• Defective compressor - continue the table
Other
• Non-Manitowoc components in system
Part Number STH025 7/11
139
SUCTION PRESSURE LOW CHECKLIST
Improper Installation
• Refer to “Installation/Visual Inspection Checklist”
(page 131)
Discharge Pressure
• Discharge pressure is too low and is affecting low
side – refer to “Freeze Cycle Discharge Pressure
Low Checklist” (page 137)
Improper Refrigerant Charge
• Undercharged
• Wrong type of refrigerant
Other
• Non-Manitowoc components in system
• Improper water supply over evaporator – refer to
“Water System Checklist” (page 132)
• Restricted/plugged liquid line drier
• Restricted/plugged tubing in suction side of
refrigeration system
• TXV starving - continue the table
140
Part Number STH025 7/11
Self-contained & Remote Condenser Single
Expansion Valve Machines - Comparing
Evaporator Inlet and Outlet Temperatures
The temperatures of the suction lines entering and
leaving the evaporator alone cannot diagnose an ice
machine. However, comparing these temperatures
during the freeze cycle, along with using Manitowoc’s
Freeze Cycle Refrigeration System Operational
Analysis Table, can help diagnose an ice machine
malfunction.
The actual temperatures entering and leaving the
evaporator vary by model, and change throughout the
freeze cycle. This makes documenting the “normal”
inlet and outlet temperature readings difficult. The key
to the diagnosis lies in the difference between the two
temperatures five minutes into the freeze cycle. These
temperatures should be within 7° of each other.
Use this procedure to document freeze cycle inlet and
outlet temperatures.
1. Navigate to Service / Real Time Data / Time &
Temp / T3 & T4 Thermistors (See page 79
Service Menu Navigation for details).
2. Wait five minutes into the freeze cycle.
3. Record the evaporator inlet (T3) and outlet (T4)
temperatures at 5 minutes into the freeze cycle.
Determine the difference.
4. Record the information on the table.
Part Number STH025 7/11
141
Harvest Valve Analysis
Symptoms of a harvest valve remaining partially open
during the freeze cycle can be similar to symptoms of
either an expansion valve or compressor problem. The
best way to diagnose a harvest valve is by using
Manitowoc’s Ice Machine Freeze Cycle Refrigeration
System Operational Analysis Table.
Use the following procedures to determine if a harvest
valve is remaining partially open during the freeze
cycle.
SELF-CONTAINED OR REMOTE CONDENSER
MODELS HARVEST VALVE ANALYSIS
1. Wait five minutes into the freeze cycle.
2. Feel the inlet of the harvest valve(s).
Important
Feeling the harvest valve outlet or across the
harvest valve itself will not work for this
comparison.
The harvest valve outlet is on the suction side
(cool refrigerant). It may be cool enough to touch
even if the valve is leaking.
3. Feel the compressor discharge line.
4. Compare the temperature of the inlet of the
harvest valves to the temperature of the
compressor discharge line.
! Warning
The inlet of the harvest valve and the compressor
discharge line could be hot enough to burn your
hand. Just touch them momentarily.
142
Part Number STH025 7/11
Findings
Comments
The inlet of the harvest
valve is cool enough to
touch and the
compressor discharge
line is hot.
This is normal as the discharge
line should always be too hot to
touch and the harvest valve
inlet, although too hot to touch
during harvest, should be cool
enough to touch after 5 minutes
into the freeze cycle.
Cool & Hot
The inlet of the harvest
valve is hot and
approaches the
temperature of a hot
compressor discharge
line.
Hot & Hot
Both the inlet of the
harvest valve and the
compressor discharge
line are cool enough to
touch.
Cool & Cool
This is an indication something
is wrong, as the harvest valve
inlet did not cool down during
the freeze cycle. If the
compressor dome is also
entirely hot, the problem is not a
harvest valve leaking, but rather
something causing the
compressor (and the entire ice
machine) to get hot.
This is an indication something
is wrong, causing the
compressor discharge line to be
cool to the touch. This is not
caused by a harvest valve
leaking.
5. Record your findings on the table.
Part Number STH025 7/11
143
Discharge Line Temperature Analysis
GENERAL
Knowing if the discharge line temperature is
increasing, decreasing or remaining constant can be
an important diagnostic tool. Compressor discharge
line temperature on a normally operating ice machine
steadily increases throughout the freeze cycle.
Ambient air temperatures affect the discharge line
temperature.
Higher ambient air temperatures at the condenser
and/or higher inlet water temperature = higher
discharge line temperatures at the compressor.
Lower ambient air temperatures at the condenser and/
or lower supply water temperature= lower discharge
line temperatures at the compressor.
Regardless of ambient and water temperatures, the
freeze cycle discharge line temperature will be higher
than 150°F (66°C) at the end of the freeze cycle.
PROCEDURE
1. Navigate to Service / Real Time Data / Time &
Temp / T2 Thermistor (See page 79 Service Menu
Navigation for details).
2. Observe the discharge line temperature (T2) for
the last three minutes of the freeze cycle and
record on the table.
Discharge Line Temperature Above 150°F (66°C)
At The End Of Freeze Cycle:
Ice machines that are operating normally will have
consistent minimum discharge line temperature of
150°F (66°C).
144
Part Number STH025 7/11
Water Regulating Valve
Problem (Freeze Cycle)
Valve not maintaining discharge pressure.
• Valve incorrectly set, dirty or defective. Adjust
valve to correct discharge pressure for your model
(refer to cycle times/24 hour productions charts),
clean or replace valve.
Discharge pressure extremely high; Liquid line
entering receiver feels hot.
• Water regulating valve incorrectly set or not
opening. Verify Head Pressure Control Valve
operation before changing water regulating valve.
Discharge pressure low, Liquid line entering
receiver feels warm to hot.
• Ice machine low on charge. Verify Total System
Refrigerant Charge page 222.
Part Number STH025 7/11
145
Final Analysis - Self-contained Air, Water &
Remote Condenser Models
The column with the highest number of Checkmarks
identifies the refrigeration problem.
COLUMN 1 - HARVEST VALVE LEAKING
Replace the valve as required.
COLUMN 2 - LOW CHARGE/TXV STARVING
Normally, a starving expansion valve only affects the
freeze cycle pressures, not the harvest cycle
pressures. A low refrigerant charge normally affects
both pressures. Verify the ice machine is not low on
charge before replacing an expansion valve.
1. Add refrigerant charge to verify a low charge (air
and water self-contained only). Do not add more
than 30% of nameplate refrigerant charge. If the
problem is corrected, the ice machine is low on
charge.
*Do not add charge to remote models. The
symptoms of a remote low on charge will result in
a safety limit #1 in cool ambient temperatures.
Check the liquid line temperature at the ice
machine. The liquid line will be hot with a normal
or below normal head pressure in freeze when the
ice machine is low on refrigerant.
2. Find the refrigerant leak. The ice machine must
operate with the nameplate charge. If the leak
cannot be found, proper refrigerant procedures
must still be followed Change the liquid line drier.
Then, evacuate and weigh in the proper charge.
3. If the problem is not corrected by adding charge,
the expansion valve is faulty.
146
Part Number STH025 7/11
COLUMN 3 - TXV FLOODING OR REFRIGERANT
OVERCHARGE
A loose or improperly mounted expansion valve bulb
causes the expansion valve to flood. Check bulb
mounting, insulation, etc., before changing the valve.
Verify refrigerant amount is correct by weighing
recovered refrigerant before replacing a TXV.
COLUMN 4 - COMPRESSOR
Replace the compressor. To receive warranty credit,
the compressor ports must be properly sealed by
crimping and soldering them closed.
COLUMN 5 - HARVEST PRESSURE VALVE
LEAKING (4 EVAPORATOR MODELS ONLY)
Replace the valve as required.
Part Number STH025 7/11
147
SYMPTOM #3 HARVEST PROBLEMS
SELF-CONTAINED AIR, WATER & REMOTE
CONDENSER MODELS
Normal Ice Cube
Melted Out Ice Cube
Definition of a harvest problem; At the end of a 3.5
minute harvest cycle the slab of ice is still contacting
the evaporator. The slab of ice may or may not be
removable by hand.
Harvest problems can be split into two categorizes.
•
•
148
Melted sheet of cubes at the end of the harvest
cycle. Ice can be removed rather easily by hand.
The back of the cubes are misshapen and melted.
This indicates something is on the evaporator
preventing the ice slab from releasing. Follow the
appropriate flow chart (in Troubleshooting) to
determine the cause of the problem. A manual
cleaning procedure must always be performed
when this problem is encountered.
Normal sheet of cubes at the end of the harvest
cycle. Ice is difficult to remove from the evaporator
by hand. Once removed the back of the cubes are
square and show no signs of melting. This
indicates a refrigeration problem. The source of
the problem could be in the freeze or harvest
cycle. Use the appropriate flow chart (in
Troubleshooting) to determine the cause of the
problem.
Part Number STH025 7/11
Part Number STH025 7/11
SYMPTOM #3 SELF-CONTAINED AIR OR WATER-COOLED
Ice Machine Will Not Harvest - Freeze Cycle is Normal and Ice Cubes are Not Melted After Harvest
START
Low production,
Normal fill pattern, long
harvest cycle, Possible SL #2,
Back of cubes are not melted
YES
Discharge line temperature is normal
at the end of the freeze cycle?
NO
Refer to
Symptom #2
Freeze Cycle
Operational
Analysis Table
YES
Is harvest valve energized?
Refer to Sequence of
Operation &
Wiring Diagrams
NO
YES
NO
149
Continued on Next Page...
Is head pressure high &
suction pressure low
in harvest?
(Refer to Pressure Charts)
YES
Replace
harvest
valve
150
Self Contained
Air-cooled Condenser?
YES
Fan cycling
control operates correctly
in freeze cycle?
NO
YES
Replace Fan
Cycling Control
Fan cycling
control opens below setpoint
in harvest cycle?
NO
NO
YES
Are you sure Discharge line
temperature is normal?
Repeat this flowchart
& verify all data
Part Number STH025 7/11
Self Contained
Water-cooled
Condenser?
YES
NO
Traditional Remote
Air-cooled Condenser?
Maintains correct
pressure in freeze cycle?
NO
YES
Refer to Symptom #3
Traditional Remotes Only Chart
YES
Adjust or Replace
Water Regulating
Valve
Stops water flow 100%
in harvest cycle?
NO
YES
Part Number STH025 7/11
SYMPTOM #3 - REMOTE CONDENSER
Traditional Remote Ice Machine - Long Harvest/Low Production/Intermittent Safety Limit 2
START
Fails at night or in low
ambient - Operates
normally above 70F/21C
Normal ice fill, long harvest cycle,
possible SL #2, back of cubes are
not melted at the end of harvest cycle
NO
YES
YES
Wet condenser
with water during
freeze cycle
Liquid Line
Temperature Warm
(body temperature)
Discharge line temperature
is normal at the end of the
freeze cycle?
All Remotes = >150F/65C
Liquid Line Temperature Cool
Liquid Line
Temperature Hot
NO
Replace Headmaster
YES
System low on refrigerant
Refer to Symptom
#2 - Freeze Cycle
Analysis Chart
151
152
YES
NO
Is harvest valve energized?
YES
Is head pressure high &
suction pressure low
in harvest?
YES
Replace Harvest Valve
Refer to Sequence of
Operation &
Wiring Diagrams
NO
Is head pressure low &
suction pressure low
in harvest?
YES
Part Number STH025 7/11
Refer to Harvest Pressure
Regulating Valve
Diagnostics
NO
Refer to Symptom #4 Will Not Harvest, Freeze
Cycle Normal & Ice Cubes are
Melted Flowchart
YES
Is head pressure normal &
suction pressure normal
in harvest?
NO
Repeat this flowchart &
verify all data
Single Evaporator Systems with Dual Harvest Valves: If one Harvest Vavle is open and the other is restricted / stuck closed you may have
normal harvest pressures. Look for ice not melting on one side of the evaporator.
Part Number STH025 7/11
SYMPTOM #4 SELF-CONTAINED AIR, WATER-COOLED OR REMOTE
Ice Machine Will Not Harvest - Freeze Cycle is Normal and Ice Cubes are Melted After Harvest
START
Are back of the cubes
melted at end of
harvest cycle?
NO
YES
NO
Level Ice
Machine
YES
NO
Does ice remain frozen to
the evaporator at the end of
the harvest cycle?
Is Ice
Machine level?
YES
Refer to
Symptom #2
Freeze Cycle
Operational
Analysis Table
Is water flowing over the
evaporator in the first 45 seconds
of harvest?
YES
Refer to
Dump Valve
Diagnostics
NO
Continued on Next Page...
153
154
NO
Is the evaporator dirty?
(Dry evaporator first then check)
YES
NO
Part Number STH025 7/11
Discharge line temperature is normal
at the end of the freeze cycle?
YES
NO
Refer to Heavily Scaled
Cleaning Procedure
Refer to Symptom #2
Freeze Cycle Operational
Analysis Table
Refer to Manual
Cleaning Procedure
This Page Intentionally Left Blank
Part Number STH025 7/11
155
This Page Intentionally Left Blank
156
Part Number STH025 7/11
Component Check Procedures
Electrical Components
CONTROL BOARD, DISPLAY BOARD AND TOUCH
PAD
FUNCTION
The control board, display board and touch pad
provide user input and control the ice machine
sequence of operation.
NOTE: Anytime power is supplied to wires #55 & #56
on the control board, the “Display” and “Micro” lights
will flash like a heartbeat. The two green lights are
located on the top right corner of the control board.
Display Diagnostics
1. Micro light flashes and display light is off.
2. Disconnect and reconnect both ends of the
communication cable running between the control
board and the back of the display module.
3. Press the power button on the display and watch
the green Display light on the control board.
A. Display light flashes- Test run ice machine.
B. Display light is off - Replace communication
cable first as a test, then replace display/
touch pad assembly if required.
Part Number STH025 7/11
157
Control Board Diagnostics
1. Micro light is not flashing a heartbeat.
2. Disconnect line voltage power supply to the ice
machine and wait a minimum of 15 seconds, then
reapply power.
A. Micro light flashes - continue with step 3.
B. Micro light is off - Replace control board.
3. Perform the following keystrokes on the display.
• Press Menu, scroll down to Service and press right
arrow
• Scroll down to Diagnostics and press right arrow
• Display reads Control Board, press right arrow
• Display reads Self Check, press right arrow to start
control board test
The control board performs a self test. As the test
progresses the display will show Checkmarks at the
top left of the display screen. When the fifth
Checkmark appears the display will show “Status
Passed” indicating the control board is functioning
normally.
158
Part Number STH025 7/11
Touch Pad Diagnostics
Follow the control board diagnostics to the Status
Passed display. Perform the following keystrokes on
the display.
• Display reads Status Passed, press the right arrow
• Display reads Pass Yes, press the right arrow
• Display reads Key Pad Test, press the right arrow
4. Test the functionality of all buttons on the touch
pad.
NOTE: Pushing the power button will start and stop
the ice machine. Testing it last will allow the ice
machine to continue running a freeze cycle.
• As you press the buttons the first letter of the
corresponding word will flash indicating the push
button is operating correctly
• Press the right arrow 5 times rapidly to exit.
5. Display reads Pass Yes and Pass No.
• Press left arrow 4 times to exit to home screen.
Part Number STH025 7/11
159
CONTROL BOARD RELAY TEST
The control board can be set to energize all relays for
3.5 minutes. This allows testing to verify control board
relays are closed and line voltage is available for ice
machine components - Water pump, dump valve,
water inlet valve, harvest valve(s), air compressor,
contactor/compressor/fan motor - The fan cycle
control must close to energize the fan motor.
1. Press power button to turn off ice machine.
2. Perform the following keystrokes on the display.
• Press Menu, scroll down to Service and press the
right arrow
• Scroll down to Diagnostics, press the right arrow
and select Diagnostics
• Display reads Control Board, press right arrow
• Scroll down to enbl relays and press right arrow to
start control board test
3. The control board will energize all relays and the
red light next to the relay. The red light indicates
the relay coil is energized.
4. Test for line voltage at the individual components.
A. Line voltage is present and the component is
non functional - Replace component
B. Voltage is not present at the component Proceed to step 5
5. Refer to wiring diagram and determine wire
location on the 9 pin molex connector for the
component you are testing.
6. Check for line voltage at the control board 9 pin
molex connector.
A. Line voltage at 9 pin connector - Repair
wiring to component
B. No power at 9 pin connector - Replace
control board
160
Part Number STH025 7/11
USB FLASH DRIVE SPECIFICATIONS AND
FORMATTING
Updating firmware on Indigo™ model ice machines
requires a properly formatted 2 GB or smaller USB
flash drive. All USB flash drives must be formatted
before use to remove any software programs or files
currently on the flash drive.
USB Flash Drive Specifications:
• USB 2 Version
• 2 GB or less capacity
• Fat32 File System
• 512 MB File Allocation Unit
USB Flash Drive Formatting:
Procedure to format a USB flash drive varies with
operating system software.
Windows 7 or Windows Vista Computers:
1. Insert USB flash drive; your computer may
indicate:
• “Found New Hardware” follow the prompts to
install the USB flash drive
• USB flash drive may auto play - Close auto play
window
2. Press Windows Key and E key simultaneously to
access windows explorer.
3. Right click on your USB Flash Drive.
4. Left click on “Format”.
5. Verify or select the settings below:
• USB flash drive capacity - 2 GB or less
• File System - Fat32
• Allocation Unit Size - Must be 512 MB
• Volume Label is Optional - Rename if desired
• Deselect “Perform A Quick Format” (no
checkmark)
6. Left click on “Start” - You will receive a warning “Formatting will remove all data” left click “OK”. A
“Format Complete” box will display when
formatting is finished. Close the pop up and
windows explorer.
Part Number STH025 7/11
161
Windows XP Computers:
1. Insert USB flash drive; your computer may
indicate:
• “Found New Hardware” follow the prompts to
install the USB flash drive
• USB flash drive may auto launch - Close auto
launch window.
2. To access Disk Management:
• Left click on the Windows Start Button
• Left click on “Run”
• Type compmgmt.msc and left click on “OK”
• Left click on “Disk Management”.
3. Verify USB flash drive capacity is 2 GB or less
4. Right click on the USB flash drive, then left click
on “Format” from the drop down list.
5. Verify or select the settings below:
• Volume Label is Optional - Rename if desired
• File System - Fat32
• Allocation Unit Size must be 512 MB
• Deselect “Perform A Quick Format” (no
checkmark)
6. Left click on “OK” you will receive a warning “Formatting will remove all data” left click on “OK”,
wait until formatting is complete and “status”
indicates “Healthy”, then close the disk
management window.
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Part Number STH025 7/11
UPGRADING FIRMWARE WITH A FLASH DRIVE
OR TRANSFERRING SETUP DATA TO MULTIPLE
MACHINES
Important
Do not use a flash drive with a built-in software
program, such as Sandisk brand.
1. Drag and drop the file from your email onto a flash
drive or refer to Exporting data to a flash drive to
transfer settings to multiple machines.
2. Ensure that the ice machine’s power is on.
3. Press the Menu button.
4. Press the Down arrow until Service is highlighted.
5. Press the Checkmark. The Service menu will be
displayed.
USB Setup
USB Stick
Download Frm
6. Press the Down arrow until USB Setup is
highlighted.
7. Press the Checkmark. USB Stick will appear
highlighted.
8. Press the Checkmark again. A submenu with
Download Frm (Download Firmware) appears.
9. Ensure that Download Frm is highlighted and
press the Checkmark. A display of instructions will
appear.
Part Number STH025 7/11
163
Bin Switches
Bin
Thermostat
USB Connector
USB
Display Light
Micro Light
Clean Light
Harvest Light
SL-1 Light
SL-2 Light
Thermistors
T1
T2
Dump Valve
T3
T4
Transformer
Left Bin Switch Light
Right Bin Switch Light
Water Level Probe Light
Display
Ice Thickness Probe Light
RS485
RT Harvest
Bin LED
LuminIce
Battery
Compressor
LT Harvest
Water
Level
Probe
Fuse
Relay Lights
Pump
Water Pump
AuCS
Water
Remote CVD
V
C
LPC
HPC1
HPC2
Ice
Thickness
Probe
Compressor
L1
Dump
L2
Not Used
CVD
Contactor
HPC
Right Harvest Valve
Water Inlet Valve
Left Harvest Valve
Dump Valve
Control Board
10. Follow these on-screen instructions to:
A. Insert Drive (Insert the flash drive into the
USB port on the ice machine’s control board.)
B. Press Check (Press the Checkmark.)
C. Wait For Comp (Wait approximately 5 to 10
minutes for the Firmware upgrade to
complete.
11. Upgrade Complete will appear on the display,
along with the firmware version number.
164
Part Number STH025 7/11
EXPORTING DATA TO A FLASH DRIVE
Data can be copied from the control board memory to
a flash drive and used to transfer setup and/or cycle
data to a replacement control board or to transfer
setup information to multiple ice machines. Data may
also be requested by service department personnel for
analysis or as an aid to troubleshooting. The data files
are small and can be attached to an email.
Important
Do not use a flash drive with a built-in software
program, such as Sandisk brand.
1.
2.
3.
4.
Ensure that the ice machine’s power is on.
Press the Menu button.
Press the Down arrow until Service is highlighted.
Press the Checkmark. The Service menu will be
displayed.
USB Setup
USB Stick
Export All
5. Press the Down arrow until USB Setup is
highlighted.
6. Press the Checkmark. USB Stick will appear
highlighted.
7. Press the Checkmark again. A submenu with
Export ALL and Export Setup appears.
8. Highlight Export ALL or Export Setup, depending
on your requirements, and press the Checkmark.
A display of instructions will appear.
9. Follow these on-screen instructions to:
A. Insert Drive (Insert the flash drive into the
USB port on the ice machine’s control board.)
B. Press Check (Press the Checkmark.)
C. Wait For Comp (Wait approximately 5 to 10
minutes for the download to complete.
D. Export Complete will appear on the display.
Part Number STH025 7/11
165
Bin Switches
Bin
Thermostat
USB Connector
USB
Display Light
Micro Light
Clean Light
Harvest Light
SL-1 Light
SL-2 Light
Thermistors
T1
T2
Dump Valve
T3
T4
Transformer
Left Bin Switch Light
Right Bin Switch Light
Water Level Probe Light
Display
Ice Thickness Probe Light
RS485
RT Harvest
Bin LED
LuminIce
Battery
Compressor
LT Harvest
Water
Level
Probe
Fuse
Relay Lights
Pump
Water Pump
AuCS
Water
Remote CVD
V
C
LPC
HPC1
HPC2
Ice
Thickness
Probe
Compressor
L1
Dump
L2
Not Used
CVD
Contactor
HPC
Right Harvest Valve
Water Inlet Valve
Left Harvest Valve
Dump Valve
Control Board
166
Part Number STH025 7/11
MAIN FUSE
FUNCTION
The control board fuse stops ice machine operation if
electrical components fail, causing high amp draw.
SPECIFICATIONS
The main fuse is 250 Volt, 8 amp.
! Warning
High (line) voltage is applied to the control board
(terminals #55 and #56) at all times. Removing the
control board fuse or pressing the On/Off button will
not remove the power supplied to the control board.
CHECK PROCEDURE
1. If the bin switch light is on with the water curtain/
ice dampers closed, the fuse is good.
! Warning
Disconnect electrical power to the entire ice
machine before proceeding.
2. Remove the fuse. Check for continuity across the
fuse with an ohmmeter.
Reading
Result
Open (OL)
Replace fuse
Closed (O)
Fuse is good
Part Number STH025 7/11
167
BIN SWITCH
FUNCTION
Movement of the water curtain/ice dampers control bin
switch operation. The bin switch has two main
functions:
1. Terminating the Harvest cycle and returning the
ice machine to the Freeze cycle. This occurs
when the bin switch is opened and closed again
within 30 seconds during the Harvest cycle.
2. Automatic ice machine shut-off.
If the storage bin is full at the end of a Harvest
cycle, the sheet of cubes fails to clear the water
curtain/ice dampers and holds it open. After the
water curtain/ice dampers are held open for 30
seconds, the ice machine shuts off. The ice
machine remains off until enough ice is removed
from the storage bin to allow the sheet of cubes to
drop clear of the water curtain/ice dampers. As
the water curtain/ice dampers swing back to the
operating position, the bin switch closes and the
ice machine restarts, provide the 3-minute delay
has expired.
Important
The water curtain/ice dampers must be ON (bin
switch closed) to start ice making.
SPECIFICATIONS
The bin switch is a magnetically operated reed switch.
The magnet is attached to the lower right corner of the
water curtain/ice dampers.
The bin switch is connected to a varying D.C. voltage
circuit. (Voltage does not remain constant.)
NOTE: Because of a wide variation in D.C. voltage, it
is not recommended that a voltmeter be used to check
bin switch operation.
168
Part Number STH025 7/11
Diagnostics
SYMPTOMS
Bin Switch Fails Open
• The ice machine will not start an ice making cycle
and the display indicates “Curtain Open”.
• The ice machine will run in the clean cycle.
Bin Switch Fails Closed
• When running a “Long Harvest” alert is displayed
and safety limit 2 indicated.
• May be off on a safety limit 2.
• The harvest cycle continues after ice opens and
closes the ice damper (harvest cycle is 3.5
minutes).
DIAGNOSTICS
•
•
•
•
1. Verify bin switch, damper and damper magnet are
in place.
Press the Menu button.
Scroll down to Service and press right arrow.
Scroll down to Diagnostics and press right arrow
Scroll down to Inputs and press right arrow to
display curtain switch readings (Curt SW1, Curt
SW2, etc).
2. Open and close the ice damper(s) repeatedly
while observing the display and control board
lights.
A. Curtain switch cycles open/closed and
control board light energizes/de-energizes Bin switch is operating normally
B. Curtain switch remains closed and control
board light remains on - Replace bin switch
C. Curtain switch remains open and control
board light remains off - Go to next step
Part Number STH025 7/11
169
3. Disconnect bin switch wire from control board.
4. Jumper control board bin switch wire to ground,
press the power button and observe the display
and control board lights.
A. Curtain switch closes, control board light
energizes and ice machine starts - Replace
bin switch
B. Curtain switch remains open and control
board light is off - Verify procedure was
correctly followed - Replace control board.
170
Part Number STH025 7/11
WATER LEVEL CONTROL CIRCUITRY
FUNCTION
The water level probe controls the water level by
sensing whether water is or is not contacting the water
level probe. The water level probe has three sensing
probes. Two probes are equal in length and are used
to measures conductivity for diagnostics, ice clarity
and water miser options. Factory default settings
measure resistance from both long probes to the short
probe.
SPECIFICATIONS
Freeze Cycle Water Level Setting
During the Freeze cycle, the water level probe is set to
maintain the proper water level above the water pump
housing. The water level is not adjustable. If the water
level is incorrect, check the water level probe position.
Reposition or replace the probe as necessary.
Water Inlet Valve Safety Shut-Off
In the event of a water level probe failure, this feature
limits the water inlet valve to a six-minutes.
Regardless of the water level probe input, the control
board automatically shuts off the water inlet valve if it
remains on for 6 continuous minutes.
Part Number STH025 7/11
171
Freeze Cycle Operation
During the Freeze cycle, the water inlet valve
energizes and de-energizes in conjunction with the
water level probe located in the water trough.
During the first 45 seconds of the Freeze cycle:
• The water inlet valve is ON when there is no water
in contact with the water level probes.
• The water inlet valve turns OFF after water
contacts the water level probes for 3 continuous
seconds.
• The water inlet valve will cycle ON and OFF once
in the prechill and up to two times in the freeze
cycle.
• Maximum fill time is 6 minutes for single
evaporator.
After 45 seconds into the Freeze cycle:
The water inlet valve will cycle ON, and then OFF one
more time to refill the water trough. The water inlet
valve is now OFF for the duration of the freeze cycle.
Diagnostics
SYMPTOMS
•
•
•
Water trough overfills
Water trough will not fill
Display indicates a “Long Freeze” alert and may or
may not also indicate a safety limit 1
• Ice production is low
WATER TROUGH OVERFILLING DURING THE
FREEZE CYCLE
Step 1 Press the power button and turn off the ice
machine.
Step 2 If water continues to flow with the ice machine
off, disconnect power. If water continues to flow verify
water pressure is below 80 psig before replacing the
water inlet valve.
Step 3 Check water level probe mounting and verify
secure wiring connections at the probe and control
board.
Step 4 Scroll to Service/Diagnostics/Inputs and press
down arrow until Wtr Low and Wtr High are displayed.
172
Part Number STH025 7/11
•
No is displayed - Control board is not receiving a
sensing water signal. Continue with step 5.
• Yes is displayed - Control board is receiving a
sensing water signal. Clean the water level probe
and test run.
Step 5 Start a new freeze cycle by pressing the
power button.
Step 6 Wait until the pre-chill cycle begins, then
jumper water level probe connection #2 & #3 at the
control board.
A. Water level light energizes and water flow
stops - Repair wire or replace water level
probe.
B. Water level light does not energize and water
continues to flow - Replace control board.
Step 6. Water level probe wires #2 & #3 jumpered
at the control board connector
Is Water
Flowing
into the
Water
Trough?
The
Water
Level
Light
Is:
The Water
Inlet Valve
Solenoid
Coil Is:
Cause
No
On
De-energized
The
interconnecting
wire or water level
probe is causing
the problem.
Ohm, then clean or
replace the water
level probe or wire.
Yes
Off
Energized
The control board
is causing the
problem.
Yes
On
De-energized
The water fill valve
is causing the
problem.
Part Number STH025 7/11
173
WATER WILL NOT RUN INTO THE SUMP TROUGH
DURING THE FREEZE CYCLE
Step 1 Verify water is supplied to the ice machine.
Step 2 Scroll to Service/Diagnostics/Inputs and press
down arrow until Wtr Low and Wtr High are displayed.
A. Yes is displayed - Control board is receiving a
sensing water signal. Proceed to step 3.
B. No is displayed - Control board is not
receiving a sensing water signal. Proceed to
Control Board Diagnostics page 158.
Step 3 Disconnect water level probe, observe LCD
display text.
A. No is displayed - Clean the water level probe
and test interconnecting wiring.
B. Yes is displayed - Refer to Control Board
Diagnostics page 158
174
Part Number STH025 7/11
ICE THICKNESS PROBE (HARVEST INITIATION)
FUNCTION
The ice thickness probe senses ice on the evaporator
and signals the control board to start a harvest cycle.
After ice forms on the evaporator, the ice will contact
the ice thickness probe and a harvest cycle is initiated.
SPECIFICATIONS
Freeze Time Lock-In Feature
The ice machine control system incorporates a freeze
time lock-in feature. This prevents the ice machine
from short cycling in and out of harvest.
The control board locks the ice machine in the freeze
cycle and a harvest cycle can not start for six minutes.
Maximum Freeze Time
The control system includes a built-in safety which will
automatically cycle the ice machine into harvest after
60 minutes in the freeze cycle.
Maximum Temperature
Maximum temperature for the ice thickness probe is
120 degrees F (49 degree’s C). Do not clean probe in
a dishwasher or expose to temperatures above the
maximum.
Part Number STH025 7/11
175
Ice Thickness Check
The ice thickness probe is factory-set to maintain the
ice bridge thickness at 1/8 in. (32 mm).
NOTE: Make sure the water curtain/splash shields
are in place when performing this check. It prevents
water from splashing out of the water trough.
1. Inspect the bridge connecting the cubes. It should
be about 1/8 in. (32 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. Set a 9/32” gap between the ice
thickness probe and evaporator as a starting
point. Then adjust to achieve 1/8” ice thickness.
3. Make sure the ice thickness probe wire and the
bracket do not restrict movement of the probe
ADJUSTING
SCREW
1/8” ICE BRIDGE THICKNESS
PLACE 9/32” (7mm) DRILL BIT
HERE TO SET INITIAL GAP
ICE THICKNESS ADJUSTMENT
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Part Number STH025 7/11
Diagnostics
SYMPTOMS
Premature harvest
• Display indicates ITP Failure
• Low ice production
• Thin ice in bin
• Freeze cycles are faster than published cycle
times
Will not harvest
• Display indicates ITP Failure
• Low ice production
• Thick ice in bin
• Large sheet of ice on evaporator
• Harvest cycle doesn’t start
• Freeze cycles are slower than published cycle
times
ICE MACHINE CYCLES INTO HARVEST BEFORE
ICE CONTACTS THE ICE THICKNESS PROBE
1. Reboot the control board by disconnecting and
reconnecting line voltage to the ice machine.
2. Verify ice thickness probe gap is approximately
9/32” (7 mm).
3. Wait six minutes:
• Ice Machine remains in freeze cycle - Allow ice
machine to run.
• Ice machine cycles into harvest - Replace ice
thickness probe to determine if problem is
resolved. If problem persists replace the control
board.
NOTE: Do not disconnect the ITP leads from the
control board as this will cause the ice machine to go
into harvest after the 6 min lock in.
Part Number STH025 7/11
177
ICE MACHINE DOES NOT CYCLE INTO HARVEST
If ice is on the evaporator initiate a manual harvest
cycle by performing the following keystrokes.
• Press Menu
• Scroll down to Service and press right arrow
• Scroll down to Manual Harvest and press right
arrow - A new freeze cycle will start after the
manual harvest cycle is complete.
1. Reboot the control board by disconnecting and
reconnecting line voltage to the ice machine.
2. Verify ice thickness probe gap is approximately
9/32” (7 mm).
3. Wait for ice to contact the ice thickness probe.
• Ice Machine cycles into harvest normally - Allow
ice machine to run.
• Ice machine will not cycle into harvest - Replace
ice thickness probe to determine if problem is
resolved. If problem persists replace the control
board.
178
Part Number STH025 7/11
HIGH PRESSURE CUTOUT (HPCO) CONTROL
FUNCTION
Stops the ice machine if subjected to excessive highside pressure. The HPCO control is normally closed,
and opens on a rise in discharge pressure.
SPECIFICATIONS.
Specifications
Cut-Out
Cut-In
440 psig ±10
Automatic Reset
(3103 kPa ±69 31 bar ±.69)
(Must be below 300 psig (2068 kPa 20.68 bar) to reset.)
SYMPTOM
Opening the HPCO will cause the control board to
initiate a 60 minute delay. The display counts down
from 60 minutes to 0 minutes, at which point the ice
machine attempts a restart. If the HPCO is closed the
ice machine will continue to run. If the HPCO remains
open after the 60 minute delay or reopens when the
compressor starts, the ice machine will start another
60 minute delay period. The ice machine will lockout
after 10 failed attempts.
1. Machine is off and the display indicates
“Delay XX min, HPCO Active”
2. Machine is running and the display indicates
“HPC Fault” and an alert triangle
Part Number STH025 7/11
179
CHECK PROCEDURE
Symptom #1 Machine is off and the display
indicates “Delay xx min, HPCO Active”.
1. Leave all wiring connectors attached and perform
testing within the 60 minute time delay period
2. Check for line voltage at P9 connector on control
board (Two wire connector adjacent to 9 pin
connector).
A. Line voltage present - HPCO switch has reset
and closed.
B. No line voltage present - HPCO switch is
open. Verify pressure - Below cut-in replace
HPCO - Above cut-in find root cause
problem.
3. Depending on timing either wait for the delay
period to end or start a new freeze cycle. The ice
machine will go to an initial start sequence. When
the compressor relay closes the control board
checks the HPCO
A. HPCO is open - Another 60 minute delay
period starts.
B. HPCO closed - A 3.5 minute harvest cycle
starts followed by an ice making cycle.
4. Run the system to see if the control trips at the
rated pressure. If HPCO opens at a pressure
significantly lower or higher than the control
setting of 440 psig replace the HPCO.
5. If the control opens at the correct pressure find
the root cause - Fan motor, dirty condenser,
refrigeration system issue, etc.
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Part Number STH025 7/11
Symptom #2 Machine is running and the display
indicates “HPC Fault” and an alert triangle
1. Navigate to the event log on the Service menu.
Scroll down to HPC Fault #5. Open the event and
view when and how often HPCO Fault has
occurred.
2. If this is a one time event it may be intermittent
and caused by conditions around the unit
changing. For example: High ambient
temperature, water turned off to condenser (water
cooled unit) etc.
3. Run the system to see if the control trips at the
rated pressure. If HPCO opens at a pressure
significantly lower than the control setting of 440
psig replace the HPCO.
4. If the control opens at the correct pressure (+-10
lbs) find the root cause - Fan motor, dirty condenser,
refrigeration system issue, etc.
Part Number STH025 7/11
181
FAN CYCLE CONTROL
FUNCTION
Cycles the fan motor on and off to maintain proper
operating discharge pressure.
The fan cycle control closes on an increase, and
opens on a decrease in discharge pressure.
SPECIFICATIONS
Specifications
Model
Cut-In (Close)
I0300 / I0320 I0520 /
I0450 / I0500 / I0600
I0850
I1000
I1400 / I1800
250 ±5
(1723 kPa ±.34)
(17.23 bar ±.34)
275 psig ±5
(1896 kPa ±34)
(18.96 bar±.34)
Cut-Out
(Open)
200 ±5
(1517 kPa ±.34)
(15.17 bar ±.34)
225 psig ±5
(1551 kPa ±34)
(15.51 bar ±.34)
CHECK PROCEDURE
1. Verify fan motor windings are not open or
grounded, and fan spins freely.
2. Connect manifold gauges to ice machine.
3. Hook voltmeter in parallel across the fan cycle
control, leaving wires attached.
4. Refer to chart below.
FCC Setpoint:
Reading Should
Be:
Above Cut-In
Below Cut-Out
0 Volts
Line Voltage
182
Fan
Should Be:
Running
Off
Part Number STH025 7/11
THERMISTORS
FUNCTION
Thermistor resistance values change with
temperature. The value supplied to the control board is
used to identify temperature at the thermistor location.
SPECIFICATIONS
:
Temperature of Thermistor
Resistance
°C
°F
K Ohms (x 1000)
-30° - -20°
-22° - -4°
820.85 - 466.35
-20° - -10°
-4° - 14°
466.35 - 269.05
-10° - 0°
14° - 32°
269.05 - 160.70
0° - 10°
32° - 50°
160.70 - 98.930
10° - 20°
50° - 68°
98.930 - 62.015
20° - 30°
68° - 86°
62.015 - 39.695
30° - 40°
86° - 104°
39.695 - 25.070
40° - 50°
104° - 122°
25.070 - 17.481
50° - 60°
122° - 140°
17.481 - 11.860
60° - 70°
140° - 158°
11.860 - 8.1900
70° - 80°
158° - 176°
8.1900 - 5.7530
80° - 90°
176° - 194°
5.7530 - 4.1015
90° - 100°
194° - 212°
4.1015 - 2.9735
100° - 110°
212° -230°
2.9735 - 2.1885
110° - 120°
230° - 248°
2.1885 - 1.6290
120° - 130°
248° - 266°
1.6290 - 1.2245
130° - 140°
266° - 284°
1.2245 - 0.9319
140° - 150°
284° - 302°
0.9319 - 0.7183
150° - 160°
302° - 320°
0.7183 - 0.5624
160° - 170°
320° - 338°
0.5624 - 0.4448
170° - 180°
338° - 356°
0.4448 - 0.3530
180° - 190°
356° - 374°
0.3530 - 0.2831
190° - 200°
374° - 392°
0.2831 - 0.2273
Part Number STH025 7/11
183
Four thermistors are located on the ice machine. They
are labeled T1, T2, T3, T4
T1 - Air or Water cooled Models
• Liquid line temperature sensor located at the outlet
of the condenser.
T1 - Remote Condenser or Remote Condensing
Unit Models
• Liquid line temperature sensor located at the inlet
of the receiver.
T2 - Air or Water cooled Models
• Discharge line temperature sensor located near
the compressor.
T2 - Remote Condenser or Remote Condensing
Unit Models
• Liquid line temperature sensor located at the outlet
of the receiver.
T3 -Single Expansion Valve Models
• Suction line temperature sensor located at the inlet
of the evaporator.
T4 -Single Expansion Valve Models
• Suction line temperature sensor located at the
outlet of the evaporator.
184
Part Number STH025 7/11
Part Number STH025 7/11
C
[2]
[5]
T4
T4
C
[1]
T3
T4
N
[48
48]
T4
T3
N
[1]
T4
T4
T3
W
[1]
T4
A&
W
[48
48]
T3
Co n d e n s i n g O p t io n
A
[1]
R404a
Ent Evap
[Evap In]
[Left]
R404a
Lvg Evap
[Evap
Out]
T3
T3
T3
[Right]
R404a
Lvg Evap
[Evap
Out]
T2
T2
T2
T2
T2
Compressor
or
Discharge
T1
T1
T1
R404a
Lvg
Condenser
[Liquid Line]
T1
T1
T1
T1
R404a
Ent
Receiver
Temperature Sensing Universal Location
T2
T2
R404a
Lvg
Receiver
[DipTu
Tube]
Spl
plit System Remote
Condensing
Un
Unit: Coo
ool
Vapor Defrost
Spl
plit System Remote
Condensing
Un
Unit: Coo
ool
Vapor Defrost
Spl
plit System Remote
Condenser: Hot
Gas Defrost
Spl
plit System Remote
Condenser: Hot
Gas Defrost
Self ContaineddAir Coo
ooled &
Water Cooled:
d:
Hot Gas Defrost
Self ContaineddWater Cooled:
d:
Hot Gas Defrost
Self ContaineddAir Coo
ooled: HotGas Defrost
Machine
Category
Description
Thermistor Matrix
185
SYMPTOM
Alert icon on the display is flashing and the alert
indicates a T1, T2, T3, or T4 Fault.
CHECK PROCEDURE
•
•
•
•
Press the Menu button.
Scroll down to Service and press right arrow.
Scroll down to Diagnostics and press right arrow
Scroll down to Temp Sensors and press right
arrow to display thermistor temperature readings.
NOTE: An open thermistor will display -22°F (-30°C)
and a shorted thermistor displays 475°F (246°C).
Thermistor Test
1. Disconnect thermistor from control board and
measure resistance.
2. Measure temperature at the thermistor.
3. Compare measured resistance/temperature
readings to resistance/temperature relationship
chart.
A. Within 10% of the published resistance value
- Thermistor is good
B. Not within 10% of the published resistance
value - Thermistor is defective.
Control Board Test
1. Disconnect thermistor from control board - The
display temperature reading, dropping to
-22°F (-30°C) indicates the control board is good.
2. Short thermistor pins - The display temperature
reading, climbing to 475°F (246°C) indicates the
control board is good.
186
Part Number STH025 7/11
HARVEST ASSIST AIR PUMP
FUNCTION
The air pump breaks the vacuum between the sheet of
ice and the evaporator which results in shorter harvest
cycles.
SPECIFICATIONS
115 Volt or 230 Volt - matches the ice machine
voltage.
CHECK PROCEDURE
1. The air pump is wired in parallel with the harvest
valve - Verify the ice machine is in the harvest
cycle and the harvest valve is energized.
2. If there is voltage at the air pump connector, use a
volt ohm meter to verify there is no continuity
through the motor windings then replace motor.
Part Number STH025 7/11
187
COMPRESSOR ELECTRICAL DIAGNOSTICS
The compressor does not start or will trip repeatedly
on overload.
Check Resistance (Ohm) Values
NOTE: Compressor windings can have very low ohm
values. Use a properly calibrated meter.
Perform the resistance test after the compressor
cools. The compressor dome should be cool enough
to touch (below 120°F/49°C) to assure that the
overload is closed and the resistance readings will be
accurate.
SINGLE PHASE COMPRESSORS
1. Disconnect power then remove the wires from the
compressor terminals.
2. The resistance values between C and S and
between C and R, when added together, should
equal the resistance value between S and R.
3. If the overload is open, there will be a resistance
reading between S and R, and open readings
between C and S and between C and R. Allow the
compressor to cool, then check the readings
again.
THREE PHASE COMPRESSORS
1. Disconnect power and remove the wires from the
compressor terminals.
2. The resistance values between L1 and L2,
between L2 and L3, and between L3 and L1
should all be equal.
3. If the overload is open, there will be open
readings between L1 and L2, between L2 and L3,
and between L3 and L1. Allow the compressor to
cool, then check the readings again.
188
Part Number STH025 7/11
CHECK MOTOR WINDINGS TO GROUND
Check continuity between all three terminals and the
compressor shell or copper refrigeration line. Scrape
metal surface to get good contact. If continuity is
present, the compressor windings are grounded and
the compressor should be replaced.
COMPRESSOR DRAWING LOCKED ROTOR
To determine if the compressor is seized, check the
amp draw while the compressor is trying to start.
The two likely causes of this are a defective starting
component and a mechanically seized compressor.
To determine which you have:
1. Install high and low side gauges.
2. Try to start the compressor.
3. Watch the pressures closely.
A. If the pressures do not move, the compressor
is seized. Replace the compressor.
B. If the pressures move, the compressor is
turning slowly and is not seized. Check the
capacitors and relay.
COMPRESSOR DRAWING HIGH AMPS
The continuous amperage draw on start-up should not
be near the maximum fuse size indicated on the serial
tag.
Part Number STH025 7/11
189
DIAGNOSING START COMPONENTS
If the compressor attempts to start, or hums and trips
the overload protector, check the start components
before replacing the compressor.
Capacitor
Visual evidence of capacitor failure can include a
bulged terminal end or a ruptured membrane. Do not
assume a capacitor is good if no visual evidence is
present. A good test is to install a known good
substitute capacitor. Use a capacitor tester when
checking a suspect capacitor. Clip the bleed resistor
off the capacitor terminals before testing.
• If the compressor attempts to start, or hums and
trips the overload protector, check the starting
components before replacing the compressor.
• Visual evidence of capacitor failure can include a
bulged terminal end or a ruptured membrane. Do
not assume a capacitor is good if no visual
evidence is present.
• A good test is to install a known good substitute
capacitor.
• Use a capacitor tester when checking a suspect
capacitor. Clip the bleed resistor off the capacitor
terminals before testing.
190
Part Number STH025 7/11
Relay
The relay has a set of contacts that connect and
disconnect the start capacitor from the compressor
start winding. The contacts on the relay are normally
closed (start capacitor in series with the start winding).
The relay senses the voltage generated by the start
winding and opens the contacts as the compressor
motor starts. The contacts remain open until the
compressor is de-energized.
RELAY OPERATION CHECK
1. Disconnect wires from relay terminals.
2. Verify the contacts are closed.
Measure the resistance between terminals 1 and
2. No continuity indicates open contacts. Replace
the relay.
3. Check the relay coil.
Measure the resistance between terminals 2 and
5. No resistance indicates an open coil. Replace
the relay.
Part Number STH025 7/11
191
PTCR
The PTCR allows current to flow through the start
winding at compressor startup. Current flow heats the
ceramic discs in the PTCR. The electrical resistance
increases with temperature and stops all except a
trickle of current flow through the start winding. The
small flow of current keeps the PTCR hot (260°F/
127°C) and the start winding out of the circuit.
The PTCR must be cooled before attempting to start
the compressor, otherwise the PTCR will heat up too
quickly and stop current flow through the start winding
before the compressor motor reaches full speed.
! Warning
Disconnect electrical power to the entire ice
machine at the building electrical disconnect box
before proceeding.
NOTE: If a PTCR is dropped internal damage can
occur to the ceramic PTCR discs. The ceramic disc
can chip and cause arcing which leads to PTCR
failure. Since there is no way to open the PTCR in
order to determine if the ceramic disc is chipped or
not, it must be discarded when dropped.
192
Part Number STH025 7/11
PTCR Operation Check
1. Visually inspect the PTCR. Check for signs of
physical damage.
NOTE: The PTCR case temperature may reach
210°F (100°C) while the compressor is running. This is
normal. Do not change a PTCR just because it is hot.
2. Wait at least 10 minutes for the PTCR to cool to
room temperature.
3. Remove the PTCR from the ice machine.
4. Measure the resistance of the PTCR as shown.
The resistance reading must be between:
• Two Terminal PTCR =18 to 40 ohms
• Three Terminal PTCR = 8 to 22 ohms.
Measure Resistance At Ends
Two Terminal PTCR
Measure Resistance @ Center and End
Leave Jumper Wire Attached
Three Terminal PTCR
Part Number STH025 7/11
193
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194
Part Number STH025 7/11
Refrigeration Components
HEAD PRESSURE CONTROL VALVE
Manitowoc remote systems require head pressure
control valves with special settings. Replace defective
head pressure control valves only with “original”
Manitowoc replacement parts.
Refrigerant Charge Verification
The correct amount of refrigerant (name plate charge)
is required to operate correctly at all ambient
conditions.
An ice machine with an overcharge or undercharge of
refrigerant may function properly at higher ambient
temperatures and fails at lower ambient temperatures.
Symptoms of incorrect refrigerant amount are:
• Works during the day and malfunctions at night,
and/or fails whenever the outdoor temperature
drops.
• A Safety limit is stored in control board memory.
Refrigerant loss and ambient temperature are directly
related to each other. As the ambient temperature
drops, more refrigerant is stored in the condenser.
When the refrigerant charge and ambient temperature
create an undercharge of refrigerant in the freeze
cycle, the receiver dip tube will lose it’s liquid seal.
Without liquid refrigerant to the TXV, the ice machine
fails to make a full sheet of ice in 60 minutes and a
safety limit #1 results.
NOTE: When a head pressure control valve is being
replaced or refrigerant charge is suspected, verify the
refrigerant charge is correct by recovering the
refrigerant, weighing and comparing to the nameplate
amount. Refer to Refrigerant Recovery/Evacuation”
page 208 for recovery procedures.
Part Number STH025 7/11
195
Freeze Cycle Operation All Models
The R404A head pressure control valve is non
adjustable.
At ambient temperatures of approximately 70°F (21°C)
or above, refrigerant flows through the valve from the
condenser to the receiver inlet. At temperatures below
this (or at higher temperatures if it is raining), the head
pressure control dome’s nitrogen charge closes the
condenser port and opens the bypass port from the
compressor discharge line.
In this modulating mode, the valve maintains minimum
head pressure by building up liquid in the condenser
and bypassing discharge gas directly to the receiver.
Harvest Cycle Operation
Remote Condenser Models
The head pressure control cycles into full bypass due
to the pressure drop when the harvest valve opens.
Refrigerant flows from the compressor to the
evaporator through the harvest valve and the head
pressure valve is out of the circuit.
Diagnostics
FREEZE CYCLE - REMOTE CONDENSER
1. Determine if the coil is clean.
2. Determine the air temperature entering the
condenser.
3. Determine if the head pressure is high or low in
relationship to the outside temperature. (Refer to
the proper “Cycle Times/24-Hour Ice Production/
Refrigerant Pressure Charts” page 225).
4. Determine the temperature of the liquid line
entering the receiver by feeling it. This line is
normally warm; “body temperature.”
5. Using the information gathered, refer to the chart.
196
Part Number STH025 7/11
NOTE: A head pressure control valve that will not
bypass, will function properly with condenser air
temperatures of approximately 70°F (21°C) or above.
When the temperature drops below 70°F (21°C), the
head pressure control valve fails to bypass and the ice
machine malfunctions. Lower ambient conditions can
be simulated by rinsing the condenser with cool water
during the freeze cycle.
Condition
Probable
Cause
Corrective
Measure
Discharge Pressure - High
Liquid Line Temperature Hot
Valve stuck in
bypass
Replace
valve
Discharge Pressure - Low
Liquid Line Temperature Cold
Valve not
bypassing
Replace
valve
Discharge Pressure - Low
Liquid Line Temperature Hot
Ice Machine
Low on
Charge
Refrigerant
Charge
Verification
Part Number STH025 7/11
197
Harvest Cycle
REMOTE CONDENSER
The head pressure control cycles into full bypass due
to the pressure drop when the harvest valve opens.
Refrigerant flows from the compressor to the
evaporator through the harvest valve and the head
pressure valve is out of the circuit.
Undercharge Symptoms
• Safety limit #1 or Safety limit #2 in control board
memory.
• Harvest cycle suction pressure is low.
• Harvest cycle discharge pressure is low.
• Liquid line entering receiver feels warm to hot in
the freeze cycle.
Overcharge Symptoms
• Safety limit #2 in control board memory.
• Harvest cycle suction pressure is low.
• Harvest cycle discharge pressure is normal.
• Freeze cycle time, suction and discharge pressure
are normal and the ice machine will not harvest.
The sheet of ice cubes show little or no sign of
melting when removed from the evaporator after
the harvest cycle has been completed. (If the
cubes are melted you have a release problem,
clean the ice machine).
198
Part Number STH025 7/11
HARVEST PRESSURE REGULATING (HPR)
SYSTEM REMOTE CONDENSER ONLY
GENERAL
The harvest pressure regulating (HPR) system
includes:
• Harvest pressure regulating solenoid valve (HPR
solenoid). This is an electrically operated valve
which opens when energized, and closes when
de-energized.
INLET
OUTLET
FLOW
HPR SOLENOID
•
Harvest pressure regulating valve (HPR valve).
This is a pressure regulating valve which
modulates open and closed, based on the
refrigerant pressure at the outlet of the valve. The
valve closes completely and stops refrigerant flow
when the pressure at the outlet rises above the
valve setting.
INLET
OUTLET
SV3053
HPR VALVE
Part Number STH025 7/11
199
FREEZE CYCLE
The HPR system is not used during the freeze cycle.
The HPR solenoid is closed (de-energized),
preventing refrigerant flow into the HPR valve.
HARVEST CYCLE
During the harvest cycle, the check valve in the
discharge line prevents refrigerant in the remote
condenser and receiver from back feeding into the
evaporator and condensing to liquid.
The HPR solenoid is opened (energized) during the
harvest cycle, allowing refrigerant gas from the top of
the receiver to flow into the HPR valve. The HPR valve
modulates open and closed, raising the suction
pressure high enough to sustain heat for the harvest
cycle, without allowing refrigerant to condense to liquid
in the evaporator.
In general, harvest cycle suction pressure rises, then
stabilizes in the range of 70-100 psig (517-758 kPa).
Exact pressures vary from model to model. Refer to
cycle time/24 hour ice production and operational
pressure charts.
HPR DIAGNOSTICS
Steps 1 through 4 can be quickly verified without
attaching a manifold gauge set or thermometer.
All questions must have a yes answer to continue
the diagnostic procedure.
1. Liquid line warm?
(Body temperature is normal)
If liquid line is cooler than body temperature, refer
to head pressure control valve diagnostics
page 195.
2. Ice fill pattern normal?
Refer to “Ice Formation Pattern” if ice fill is not
normal page 133.
200
Part Number STH025 7/11
3. Freeze time normal?
(Refer to Cycle Times/Refrigerant Pressures/24
Hour Ice Production Charts page 225)
Shorter freeze cycles - Refer to head pressure
control valve diagnostics page 195.
Longer freeze cycles - Refer to water system
checklist page 132, then refer to Refrigeration
Diagnostic Procedures.
4. Harvest time is longer than normal and control
board indicates safety limit #2?
(Refer to Cycle Times/Refrigerant Pressures/24
Hour Ice Production Charts page 225)
Connect refrigeration manifold gauge set to the
access valves on the front of the ice machine.
Establish baseline by recording suction and
discharge pressure and freeze & harvest cycle
times. (Refer to “Freeze Cycle Refrigeration
System Operational Analysis Tables” for data
collection detail page 123).
5. Discharge line temperature is greater than 150°F
(66°C) [I0850/I1000 Air/Water Only 140°F (60°C)] at the end of the freeze cycle? (See
Discharge Line Temperature Analysis on
page 144)
6. Freeze cycle Head Pressure is in the range
indicated in the cycle time/24 hour ice production
and operational pressure chart?
If the head pressure is low refer to head pressure
control valve diagnostics page 195.
7. Freeze cycle Suction Pressure normal?
Refer to analyzing suction pressure if suction
pressure is high or low page 138.
8. Harvest cycle suction and discharge pressures
are lower than indicated in the cycle times/
refrigerant pressures/24 hour ice production
chart?
9. Replace Harvest Pressure Regulating solenoid.
Part Number STH025 7/11
201
WATER REGULATING VALVE
Water-Cooled Models Only
FUNCTION
The water regulating valve maintains the freeze cycle
discharge pressure.
CHECK PROCEDURE
1. Determine if the head pressure is high or low
(refer to cycle time/24 hour ice production and
operational pressure chart for the model you are
servicing).
2. Verify the condenser water meets specifications.
3. Adjust valve to increase or decrease discharge
pressure.
4. Determine the temperature of the liquid line
entering the receiver by feeling it. This line is
normally warm; body temperature.
5. Using the information gathered, refer to the list for
diagnosis.
Problem (Freeze Cycle)
Valve not maintaining discharge pressure.
• Valve incorrectly set, dirty or defective. Adjust,
clean or replace valve.
Discharge pressure extremely high; Liquid line
entering receiver feels hot.
• Water regulating valve incorrectly set or not
opening.
Discharge pressure low, Liquid line entering
receiver feels warm to hot.
• Ice machine low on charge. Verify Total System
Refrigerant Charge page 222.
202
Part Number STH025 7/11
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Part Number STH025 7/11
203
Refrigerant Recovery/Evacuation
SELF-CONTAINED MODEL PROCEDURE
Do not purge refrigerant to the atmosphere. Capture
refrigerant using recovery equipment. Follow the
manufacturer’s recommendations.
Important
Manitowoc assumes no responsibility for the use of
contaminated refrigerant. Damage resulting from the
use of contaminated refrigerant is the sole
responsibility of the servicing company.
Important
Replace the liquid line drier after recovering the
refrigerant and before evacuating and recharging.
Use only a Manitowoc (OEM) liquid line filter-drier to
prevent voiding the warranty.
Connections
Manifold gauge sets must utilize low loss fittings to
comply with U.S. Government rules and regulations.
Make these connections:
• Suction side of the compressor through the suction
service valve.
• Discharge side of the compressor through the
discharge service valve.
204
Part Number STH025 7/11
Self-Contained Recovery/Evacuation
1. Press the power button and cycle the ice machine
off.
2. Install manifold gauges, scale and recovery unit or
two-stage vacuum pump and open high and low
side on manifold gauges.
MANIFOLD SET
OPEN
LOW SIDE
ACCESS
VALVE
OPEN
HIGH SIDE
ACCESS
VALVE
VACUUM PUMP/
RECOVERY UNIT
OPEN
CLOSED
RECOVERY/EVACUATION
CONNECTIONS
3. Perform recovery or evacuation:
A. Recovery: Operate the recovery unit as
directed by the manufacturer’s instructions.
B. Evacuation prior to recharging: Pull the
system down to 500 microns. Then, allow the
pump to run for an additional half hour. Turn
off the pump and perform a standing vacuum
leak check.
4. Follow the Charging Procedures.
Part Number STH025 7/11
205
Self-Contained Charging Procedures
Important
The charge is critical on all Manitowoc ice
machines. Use a scale to ensure the proper
charge is installed.
1. Be sure the ice machine is off.
MANIFOLD SET
CLOSED
OPEN
LOW SIDE
ACCESS
VALVE
HIGH SIDE
ACCESS
VALVE
REFRIGERANT
CYLINDER
VACUUM PUMP/
RECOVERY UNIT
CLOSED
SCALE
OPEN
CHARGING CONNECTIONS
206
Part Number STH025 7/11
2. Close the vacuum pump valve, the low side
service valve, and the low side manifold gauge
valve.
3. Open the high side manifold gauge valve.
4. Open the charging cylinder and add the proper
refrigerant charge (shown on nameplate) through
the discharge service valve.
5. Let the system “settle” for 2 to 3 minutes.
6. Close the high side on the manifold gauge set.
7. Press the power button.
8. Add any remaining vapor charge through the
suction service valve (if necessary).
NOTE: Manifold gauges must be removed properly to
ensure that no refrigerant contamination or loss
occurs.
9. Make sure that all of the vapor in the charging
hoses is drawn into the ice machine before
disconnecting the charging hoses.
A. Run the ice machine in freeze cycle.
B. Remove the high side low loss fitting from the
access valve.
C. Open the high and low side valves on the
manifold gauge set. Any refrigerant in the
lines will be pulled into the low side of the
system.
D. Allow the pressures to equalize while the ice
machine is in the freeze cycle.
E. Remove the hoses from the ice machine and
install the caps.
Part Number STH025 7/11
207
REMOTE CONDENSER MODEL PROCEDURE
Refrigerant Recovery/Evacuation
Do not purge refrigerant to the atmosphere. Capture
refrigerant using recovery equipment. Follow the
manufacturer’s recommendations.
Important
Manitowoc Ice assumes no responsibility for the
use of contaminated refrigerant. Damage
resulting from the use of contaminated refrigerant
is the sole responsibility of the servicing
company.
Important
Replace the liquid line drier after recovering the
refrigerant and before evacuating and recharging.
Use only a Manitowoc (O.E.M.) liquid line filter
drier to prevent voiding the warranty.
208
Part Number STH025 7/11
CONNECTIONS
Important
Recovery/evacuation of a remote system
requires connections at four points for complete
system evacuation.
Make these connections:
• Suction side of the compressor through the suction
service valve.
• Discharge side of the compressor through the
discharge service valve.
• Receiver outlet service valve, which evacuates the
area between the check valve in the liquid line and
the pump down solenoid.
• Access (Schraeder) valve on the discharge line
quick-connect fitting, located on the outside of the
compressor/evaporator compartment. This
connection evacuates the condenser. Without it,
the magnetic check valves would close when the
pressure drops during evacuation, preventing
complete evacuation of the condenser.
NOTE: Manitowoc recommends using an access
valve core removal and installation tool on the
discharge line quick-connect fitting. This permits
access valve core removal. This allows for faster
evacuation and charging, without removing the
manifold gauge hose.
Part Number STH025 7/11
209
REMOTE CONDENSER RECOVERY/EVACUATION
1. Press the power button to stop the ice machine.
2. Install manifold gauges, scale and recovery unit or
two-stage vacuum pump.
3. Open high and low side on the manifold gauge
set.
4. Perform recovery or evacuation:
A. Recovery: Operate the recovery unit as
directed by the manufacturer’s instructions.
B. Evacuation prior to recharging: Pull the
system down to 500 microns. Then, allow the
pump to run for an additional hour. Turn off
the pump and perform a standing vacuum
leak check.
NOTE: Check for leaks with an electronic leak
detector after charging the ice machine.
5. Follow the Charging Procedures.
210
Part Number STH025 7/11
ACCESS
REMOTE
RECOVERY/EVACUATION
CONNECTIONS
Part Number STH025 7/11
211
Remote Charging Procedures
1. Close the vacuum pump valve and the low side
manifold gauge valve.
2. Open the refrigerant cylinder and add the proper
refrigerant charge (shown on nameplate) into the
system high side (receiver outlet valve and
discharge lines quick-connect fitting).
3. If the high side does not take the entire charge,
close the high side on the manifold gauge set and
start the ice machine. Add the remaining charge
through the low side (in vapor form) until the
machine is fully charged.
NOTE: If an access valve core removal and
installation tool is used on any of the Schraeder
valves, reinstall the cores before disconnecting the
access tool and hose.
4. Open the high and low side valves on the
manifold gauge set. Any refrigerant in the lines
will be pulled into the low side of the system.
5. Allow the pressures to equalize while the ice
machine is in the freeze cycle.
6. Remove the low side hose from the access valve
and install the caps.
212
Part Number STH025 7/11
EVAPORATOR
HEAT EXCHANGER
EXPANSION
VALVE
SOLENOID
VALVE
x
LOW SIDE
ACCESS VALVE
STRAINER
COMPRESSOR
x
HARVEST
PRESSURE
SOLENOID
VALVE
CHECK
VALVE
x
HARVEST
PRESSURE
REGULATING
VALVE
HIGH SIDE
ACCESS VALVE
LIQUID
LINE
SOLENOID
DISCHARGE LINE
QUICK CONNECT
SCHRAEDER FITTING
DRIER
REMOTE CONDENSER
RECEIVER
ACCESS VALVE
B
CHECK VALVE
R
C
HEAD PRESSURE
CONTROL VALVE
MANIFOLD SET
TEE
CLOSED
OPEN
CLOSED
SCALE
VACUUM PUMP/
RECOVERY UNIT
OPEN
REMOTE CHARGING
CONNECTIONS
Part Number STH025 7/11
213
System Contamination Clean-Up
General
This section describes the basic requirements for
restoring contaminated systems to reliable service.
Important
Manitowoc Ice assumes no responsibility for the use
of contaminated refrigerant. Damage resulting from
the use of contaminated refrigerant is the sole
responsibility of the servicing company.
DETERMINING SEVERITY OF CONTAMINATION
System contamination is generally caused by either
moisture or residue from compressor burnout entering
the refrigeration system.
Inspection of the refrigerant usually provides the first
indication of system contamination. Obvious moisture
or an acrid odor in the refrigerant indicates
contamination.
If either condition is found, or if contamination is
suspected, use a Total Test Kit from Totaline or a
similar diagnostic tool. These devices sample
refrigerant, eliminating the need to take an oil sample.
Follow the manufacturer’s directions.
If a refrigerant test kit indicates harmful levels of
contamination, or if a test kit is not available, inspect
the compressor oil.
1. Remove the refrigerant charge from the ice
machine.
2. Remove the compressor from the system.
3. Check the odor and appearance of the oil.
4. Inspect open suction and discharge lines at the
compressor for burnout deposits.
5. If no signs of contamination are present, perform
an acid oil test.
Check the chart on the next page to determine the
type of cleanup required.
214
Part Number STH025 7/11
Contamination Cleanup Chart
Symptoms/Findings
No symptoms or suspicion of
contamination
Moisture/Air Contamination
symptoms
Refrigeration system open to
atmosphere for longer than
15 minutes
Refrigeration test kit and/or
acid oil test shows
contamination
Leak in water cooled
condenser
No burnout deposits in open
compressor lines
Mild Compressor Burnout
symptoms
Oil appears clean but smells
acrid
Refrigeration test kit or acid
oil test shows harmful acid
content
No burnout deposits in open
compressor lines
Severe Compressor Burnout
symptoms
Oil is discolored, acidic, and
smells acrid
Burnout deposits found in the
compressor, lines, and other
components
Part Number STH025 7/11
Required Cleanup
Procedure
Normal
evacuation/recharging
procedure
Mild contamination
cleanup procedure
Mild contamination
cleanup procedure
Severe contamination
cleanup procedure
215
CLEANUP PROCEDURE
Mild System Contamination
1. Replace any failed components.
2. If the compressor is good, change the oil.
3. Replace the liquid line drier.
NOTE: If the contamination is from moisture, use
heat lamps during evacuation. Position them at the
compressor, condenser and evaporator prior to
evacuation. Do not position heat lamps too close to
plastic components, or they may melt or warp.
Important
Dry nitrogen is recommended for this procedure.
This will prevent CFC release.
4. Follow the normal evacuation procedure, except
replace the evacuation step with the following:
A. Pull vacuum to 1000 microns. Break the
vacuum with dry nitrogen and sweep the
system. Pressurize to a minimum of 5 psig
(35 kPa,.35 bar).
B. Pull vacuum to 500 microns. Break the
vacuum with dry nitrogen and sweep the
system. Pressurize to a minimum of 5 psig
(35 kPa,.35 bar).
C. Change the vacuum pump oil.
D. Pull vacuum to 500 microns. Run the vacuum
pump for 1/2 hour on self-contained models,
1 hour on remotes.
NOTE: You may perform a standing vacuum test to
make a preliminary leak check. You should use an
electronic leak detector after system charging to be
sure there are no leaks.
5. Charge the system with the proper refrigerant to
the nameplate charge.
6. Operate the ice machine.
216
Part Number STH025 7/11
Severe System Contamination
1. Remove the refrigerant charge.
2. Remove the compressor and inspect the
refrigeration lines. If burnout deposits are found,
install a new harvest valve, replace the manifold
strainer, TXV and harvest pressure regulating
valve.
3. Wipe away any burnout deposits from suction and
discharge lines at compressor.
4. Sweep through the open system with dry
nitrogen.
Important
Refrigerant sweeps are not recommended, as they
release CFCs into the atmosphere.
5. Install a new compressor and new start
components.
6. Install a suction line filter-drier with acid and
moisture removal capability. Place the filter drier
as close to the compressor as possible.
7. Install an access valve at the inlet of the suction
line drier.
8. Install a new liquid line drier.
Part Number STH025 7/11
217
Important
Dry nitrogen is recommended for this procedure.
This will prevent CFC release.
9. Follow the normal evacuation procedure, except
replace the evacuation step with the following:
A. Pull vacuum to 1000 microns. Break the
vacuum with dry nitrogen and sweep the
system. Pressurize to a minimum of 5 psig
(35 kPa,.35 bar).
B. Change the vacuum pump oil.
C. Pull vacuum to 500 microns. Break the
vacuum with dry nitrogen and sweep the
system. Pressurize to a minimum of 5 psig
(35 kPa,.35 bar).
D. Change the vacuum pump oil.
E. Pull vacuum to 500 microns. Run the vacuum
pump for 1/2 hour on self-contained models,
1 hour on remotes.
NOTE: You may perform a standing vacuum test to
make a preliminary leak check. You should use an
electronic leak detector after system charging to be
sure there are no leaks.
10. Charge the system with the proper refrigerant to
the nameplate charge.
11. Operate the ice machine for one hour. Then,
check the pressure drop across the suction line
filter-drier.
A. If the pressure drop is less than 1 psig
(7 kPa,.7 bar), the filter-drier should be
adequate for complete cleanup.
B. If the pressure drop exceeds 1 psig (7 kPa,.7
bar), change the suction line filter-drier and
the liquid line drier. Repeat until the pressure
drop is acceptable.
12. Operate the ice machine for 48-72 hours. Then
remove the suction line drier and change the
liquid line drier.
13. Follow normal evacuation procedures.
218
Part Number STH025 7/11
REPLACING PRESSURE CONTROLS WITHOUT
REMOVING REFRIGERANT CHARGE
This procedure reduces repair time and cost. Use it
when any of the following components require
replacement, and the refrigeration system is
operational and leak-free.
• Fan cycle control (air cooled only)
• Water regulating valve (water cooled only)
• High pressure cut-out control
• Low Pressure cut-out control
• High side service valve
• Low side service valve
Important
This is a required in-warranty repair procedure.
1. Disconnect power to the ice machine.
2. Follow all manufacturer’s instructions supplied
with the pinch-off tool. Position the pinch-off tool
around the tubing as far from the pressure control
as feasible. (See the figure on next page.) Clamp
down on the tubing until the pinch-off is complete.
! Warning
Do not unsolder a defective component. Cut it out of
the system. Do not remove the pinch-off tool until the
new component is securely in place.
3. Cut the tubing of the defective component with a
small tubing cutter.
4. Solder the replacement component in place.
Allow the solder joint to cool.
5. Remove the pinch-off tool.
6. Re-round the tubing. Position the flattened tubing
in the proper hole in the pinch-off tool. Tighten the
wing nuts until the block is tight and the tubing is
rounded.
NOTE: The pressure controls will operate normally
once the tubing is re-rounded. Tubing may not reround 100%.
Part Number STH025 7/11
219
USING PINCH-OFF TOOL
220
Part Number STH025 7/11
LIQUID LINE FILTER-DRIERS
The filter-driers used on Manitowoc ice machines are
manufactured to Manitowoc specifications.
The difference between a Manitowoc drier and an offthe-shelf drier is in filtration. A Manitowoc drier has
dirt-retaining filtration, with fiberglass filters on both the
inlet and outlet ends. This is very important because
ice machines have a back-flushing action that takes
place during every Harvest cycle.
A Manitowoc filter-drier has high moisture and acid
removal capability.
The size of the filter-drier is important. The refrigerant
charge is critical. Using an improperly sized filter-drier
will cause the ice machine to be improperly charged
with refrigerant.
Important
Driers are covered as a warranty part. The drier
must be replaced any time the system is opened for
repairs.
Part Number STH025 7/11
221
222
TOTAL SYSTEM REFRIGERANT CHARGE
NOTE: All machines listed use R-404A refrigerant - This information is for reference only. Refer to the ice machine
serial number tag to verify the system charge. Serial plate information overrides information listed on these pages.
Part Number STH025 7/11
Model
Air Cooled
Water Cooled
Remote
Additional
Refrigerant for Line
Sets 51’-100’
Maximum
System Charge
I0300
15 oz.
12 oz.
NA
NA
NA
I0320
20 oz.
18 oz.
NA
NA
NA
I0450
20 oz.
14 oz.
NA
NA
NA
I0500
24 oz.
23 oz.
6 lb.
1.5 lb.
7.5 lb.
I0520
22 oz.
14 oz.
NA
NA
NA
I0600
32 oz.
28 oz.
6.5 lb.
1.5 lb.
8 lb.
I0850
34 oz.
26 oz.
8.5 lb.
2 lb.
10.5 lb.
I1000
36 oz.
28 oz.
7 lb.
2 lb.
9 lb.
I1200
42 oz.
34 oz.
NA
NA
NA
This Page Intentionally Left Blank
Part Number STH025 7/11
223
This Page Intentionally Left Blank
224
Part Number STH025 7/11
Charts
Cycle Times/24-Hour Ice Production/
Refrigerant Pressure Charts
These charts are used as guidelines to verify correct
ice machine operation.
Accurate collection of data is essential to obtain the
correct diagnosis.
• Production and cycle times are for dice cube - Half
dice cube cycle times can be 2 - 3 minutes faster,
depending on model and ambient temperature.
• Regular cube production derate is 7%.
• Ice production checks that are within 10% of the
chart are considered normal. This is due to
variances in water and air temperature. Actual
temperatures will seldom match the chart exactly.
• Refer to “Symptom #2 - Operational Analysis
Table” page 123 for the list of data that must be
collected for refrigeration diagnostics. This list
includes: before beginning service, ice production
check, installation/visual inspection, water system
checklist, ice formation pattern, safety limits,
comparing evaporator inlet/outlet temperatures,
discharge and suction pressure analysis.
• Zero out manifold gauge set before obtaining
pressure readings to avoid misdiagnosis.
• Discharge and suction pressure are highest at the
beginning of the cycle. Suction pressure will drop
throughout the cycle. Verify the pressures are
within the range indicated.
• Record beginning of freeze cycle suction pressure
one minute after water pump energizes.
• 50Hz dice and half dice production derate is 12%.
• 50Hz regular cube total production derate is 14%.
Part Number STH025 7/11
225
I0300 SERIES
I0300A
Self-Contained Air-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time
Air Temp.
Entering
Condenser
°F/°C
Water Temperature °F/°C
50/10
70/21
90/32
70/21
9.6-11.5
10.8-12.9
12.3-14.6
80/27
10.6-12.6
12.3-14.6
13.5-16.0
90/32
11.8-14.0
13.9-16.4
15.0-17.7
100/38
13.2-15.7
14.6-17.3
16.2-19.2
110/43
15.0-17.7
15.8-18.7
17.7-20.9
Harvest
Time1
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Air Temp. Entering
Condenser °F/°C
Water Temperature °F/°C1
50/10
70/21
90/32
70/21
310
280
250
80/27
285
250
230
90/32
260
225
210
100/38
235
215
195
110/43
210
200
180
1 Based on average ice slab weight of 2.40 - 2.80 lb.
OPERATING PRESSURES
Air Temp
Entering
Condenser
°F/°C
Freeze Cycle
Discharge
Pressure
PSIG
Harvest Cycle
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG1
75-100
50/10
195-245
50-20
135-160
70/21
195-260
50-20
135-165
80-110
80/27
220-290
60-24
150-170
90-120
90/32
240-320
60-25
170-195
115-135
100/38
285-370
70-28
200-220
130-155
110/43
330-415
78-32
230-250
150-175
1 Suction pressure drops gradually throughout the freeze cycle
226
Part Number STH025 7/11
I0300W
Self-Contained Water-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time
Air Temp.
Entering
Condenser
°F/°C
50/10
70/21
90/32
70/21
10.0-11.9
11.1-13.2
12.3-14.6
80/27
10.2-12.2
11.3-13.4
12.3-14.6
90/32
10.4-12.4
11.8-14.0
12.6-15.0
100/38
10.6-12.6
11.8-14.0
12.6-15.7
110/43
10.8-12.9
11.8-14.0
12.9-15.3
Water Temperature °F/°C
Harvest
Time1
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Air Temp. Entering
Condenser °F/°C
Water Temperature °F/°C
50/10
70/21
90/32
70/21
300
275
250
80/27
295
270
250
90/32
290
260
245
100/38
285
260
245
110/43
280
260
240
1 Based on average ice slab weight of 2.40 - 2.80 lb.
OPERATING PRESSURES
Air Temp
Entering
Condenser
°F/°C
Freeze Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG1
50/10
220-230
50-25
130-170
75-100
70/21
220-230
50-28
130-170
85-100
80/27
225-245
65-29
130-180
85-110
90/32
230-250
65-30
135-180
85-115
100/38
230-260
70-31
145-190
90-120
110/43
235-260
70-31
150-190
90-120
1 Suction pressure drops gradually throughout the freeze cycle
2 Water regulating valve set to maintain 220 psig
3 Condenser Water Usage = 193 gal/100 lb ice @ 90°/70°F
Part Number STH025 7/11
227
I0320 SERIES
I0320A
Self-Contained Air-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
Freeze Time
50/10
70/21
90/32
70/21
13.1-15.2
15.7-18.2
16.6-19.3
80/27
15.7-18.2
17.3-20.1
18.9-21.9
90/32
18.1-21.0
20.3-23.5
21.3-24.6
100/38
21.3-24.6
23.0-26.6
24.3-28.1
Water Temperature °F/°C
Harvest
Time1
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Water Temperature °F/°C1
Air Temp. Entering
Condenser °F/°C
50/10
70/21
90/32
70/21
335
285
270
80/27
285
260
240
90/32
250
225
215
100/38
215
200
190
1 Based on average ice slab weight of 3.40 - 3.90 lb.
OPERATING PRESSURES
Air Temp
Entering
Condenser
°F/°C
Freeze Cycle
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG1
50/10
195-260
60-34
130-160
80-115
70/21
195-260
70-36
130-165
90-120
80/27
215-295
75-36
140-165
110-125
90/32
240-320
80-38
155-180
120-135
100/38
290-365
90-40
175-215
140-165
110/43
325-415
95-42
200-230
160-185
1 Suction pressure drops gradually throughout the freeze cycle
228
Part Number STH025 7/11
I0320W
Self-Contained Water-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Around Ice
Machine
°F/°C
Freeze Time
50/10
70/21
90/32
70/21
13.3-15.5
15.4-17.9
16.6-19.3
80/27
13.8-16.1
16.0-18.6
17.3-20.1
90/32
1.3-16.6
16.6-19.3
18.1-21.0
100/38
14.8-17.2
17.3-20.1
18.9-21.9
110/43
1.4-17.9
18.1-21.0
19.5-22.9
Water Temperature °F/°C
Harvest
Time1
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Air Temp. Around Ice
Machine °F/°C
Water Temperature °F/°C1
50/10
70/21
90/32
70/21
330
290
270
80/27
320
280
260
90/32
310
270
250
100/38
300
260
240
110/43
290
250
230
1 Based on average ice slab weight of 3.40-3.90 lb.
OPERATING PRESSURES
Air Temp.
Around Ice
Machine
°F/°C
Freeze Cycle
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG 1
50/10
220-245
60-33
140-185
85-105
70/21
220-250
60-34
140-190
90-120
80/27
235-265
75-38
145-195
90-145
90/32
250-300
80-40
145-200
100-145
100/38
250-360
85-41
175-225
110-150
110/43
250-380
90-42
200-240
120-160
1 Suction pressure drops gradually throughout the freeze cycle
2 Water regulating valve set to maintain 220 psig
3 Condenser Water Usage = 193 gal/100 lb ice @ 90°/70°F
Part Number STH025 7/11
229
I0450 SERIES
I0450A
Self-Contained Air-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time
Air Temp.
Entering
Condenser
°F/°C
50/10
70/21
80/27
Water Temperature °F/°C
70/21
90/32
10.2-11.9
11.1-12.9
12.1-14.1
11.4-13.3
12.3-14.3
13.3-15.5
90/32
12.5-14.5
13.8-16.1
14.8-17.2
100/38
13.8-16.1
15.4-17.9
16.6-19.3
110/43
16.3-18.9
17.7-20.5
19.3-22.4
Harvest
Time1
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Air Temp. Entering
Condenser °F/°C
Water Temperature °F/°C1
50/10
70/21
90/32
70/21
420
390
360
80/27
380
355
330
90/32
350
320
300
100/38
320
290
270
110/43
275
255
235
1 Based on average ice slab weight of 3.40 - 3.90 lb.
OPERATING PRESSURES
Air Temp
Entering
Condenser
°F/°C
Freeze Cycle
Discharge
Pressure
PSIG
Harvest Cycle
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG1
50/10
195-255
50-25
125-185
70-90
70/21
195-255
60-25
135-190
80-110
80/27
220-275
62-28
135-195
80-110
90/32
250-320
70-31
175-195
85-115
100/38
290-370
75-33
190-215
115-140
110/43
310-380
80-33
210-250
120-170
1 Suction pressure drops gradually throughout the freeze cycle
230
Part Number STH025 7/11
I0450W
Self-Contained Water-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time
Air Temp.
Entering
Condenser
°F/°C
50/10
70/21
90/32
70/21
9.9-11.6
11.1-12.9
12.1-14.1
Water Temperature °F/°C
80/27
10.2-11.9
11.6-13.5
12.5-14.5
90/32
10.3-12.0
12.1-14.1
12.9-15.0
100/38
10.4-12.2
12.5-14.5
13.3-15.5
110/43
10.7-12.5
12.9-15.0
14.3-16.6
Harvest
Time1
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Water Temperature °F/°C1
Air Temp. Entering
Condenser °F/°C
50/10
70/21
90/32
70/21
430
390
360
80/27
420
375
350
90/32
415
360
340
100/38
410
350
330
110/43
400
340
310
1 Based on average ice slab weight of 3.40 - 3.90 lb.
OPERATING PRESSURES
Air Temp
Entering
Condenser
°F/°C
Freeze Cycle
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG1
50/10
220-230
48-28
130-160
70-95
70/21
220-240
52-28
130-160
75-100
80/27
230-240
55-29
130-160
75-110
90/32
220-240
55-30
135-160
80-115
100/38
235-240
60-30
170-205
80-120
110/43
240-240
60-30
140-205
80-120
1 Suction pressure drops gradually throughout the freeze cycle
2 Water regulating valve set to maintain 220 psig
3 Condenser Water Usage = 169 gal/100 lb ice @ 90°/70°F
Part Number STH025 7/11
231
I0500 SERIES
I0500A
Self-Contained Air-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time
Air Temp.
Entering
Condenser
°F/°C
50/10
70/21
90/32
70/21
11.0-12.6
12.9-14.8
14.3-16.3
80/27
12.4-14.3
14.9-17.0
15.1-17.2
90/32
14.5-16.5
15.5-17.7
17.4-19.9
100/38
16.2-18.5
17.7-20.2
19.9-22.7
110/43
18.6-21.2
20.2-22.1
22.2-25.2
Water Temperature °F/°C
Harvest
Time1
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Water Temperature °F/°C12
Air Temp. Entering
Condenser
°F/°C
50/10
70/21
90/32
70/21
530
460
420
80/27
475
405
400
90/32
415
390
350
100/38
375
345
310
110/43
330
305
280
1 Based on average ice slab weight of 4.60 - 5.20 lb
2 230/50/1 is approximately 12% lower than 230/60/1
OPERATING PRESSURES
Freeze Cycle
Air Temp.
Entering
Discharge
Suction
Condenser Pressure
Pressure
°F/°C
PSIG
PSIG
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG1
50/10
200-240
50-28
120-145
70-100
70/21
205-245
70-30
120-150
80-110
80/27
210-270
70-31
120-165
80-110
90/32
270-325
70-32
120-190
100-120
100/38
300-400
90-34
210-230
130-150
110/43
330-425
90-36
220-240
140-160
1 Suction pressure drops gradually throughout the freeze cycle
232
Part Number STH025 7/11
I0500W
Self-Contained Water-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time
Air Temp.
Entering
Condenser
°F/°C
50/10
70/21
90/32
70/21
10.5-12.1
13.2-15.1
15.3-17.5
Water Temperature °F/°C
80/27
11.9-13.6
13.7-15.7
15.5-17.7
90/32
12.3-14.1
13.9-15.9
15.7-17.9
100/38
12.6-14.4
14.3-16.3
16.2-18.5
110/43
12.9-14.8
14.5-16.5
16.6-19.0
Harvest
Time1
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Water Temperature °F/°C1
Air Temp. Around Ice
Machine °F/°C
50/10
70/21
90/32
70/21
550
450
395
80/27
495
435
390
90/32
480
430
385
100/38
470
420
375
110/43
460
415
365
1 Based on average ice slab weight of 4.60 - 5.20 lb
OPERATING PRESSURES
Freeze Cycle
Harvest Cycle
Air Temp.
Around Ice
Machine
°F/°C
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG 1
70/21
230-240
60-33
130-150
95-120
80/27
230-240
65-33
130-160
95-120
90/32
230-250
70-33
170-190
95-120
100/38
235-250
75-33
170-190
95-120
110/43
235-250
75-33
170-190
95-120
1 Suction pressure drops gradually throughout the freeze cycle
2 Water regulating valve set to maintain 230 psig
3 Condenser Water Usage = 165 gal/100 lb ice @ 90°/70°F
Part Number STH025 7/11
233
I0500N
Remote Air-Cooled Condenser Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
Freeze Time
50/10
70/21
90/32
-20/-29 to
70/21
12.3-14.1
12.7-14.7
13.7-15.8
Water Temperature °F/°C
90/32
12.4-14.3
13.9-15.9
14.7-17.0
100/38
12.8-14.9
14.1-16.3
15.3-17.7
110/43
13.3-15.4
14.5-16.7
16.0-18.5
Harvest
Time1
0.75-2.0
1 Times in minutes
24 HOUR ICE PRODUCTION
Water Temperature °F/°C1
Air Temp. Entering
Condenser
°F/°C
50/10
70/21
90/32
-20/-29 to 70/21
480
445
415
90/32
455
430
390
100/38
440
405
375
110/43
425
395
360
1 Based on average ice slab weight of 4.60 - 5.20 lb
OPERATING PRESSURES
Freeze Cycle
Air Temp.
Entering
Discharge
Suction
Condenser Pressure
Pressure
°F/°C
PSIG
PSIG
Discharge
Pressure
PSIG
Harvest Cycle
Suction
Pressure
PSIG1
50/10
205-220
50-32
100-150
75-100
70/21
240-260
60-32
110-160
75-100
80/27
240-270
60-32
110-160
75-100
90/32
250-270
60-32
120-160
80-100
100/38
300-375
85-35
130-170
80-100
110/43
310-375
90-36
130-170
80-100
1 Suction pressure drops gradually throughout the freeze cycle
234
Part Number STH025 7/11
I0520 SERIES
I0520A
Self-Contained Air-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time
Air Temp.
Entering
Condenser
°F/°C
50/10
70/21
8.8-10.3
10.2-11.9
11.7-13.7
80/27
9.9-11.6
11.4-13.3
13.8-16.1
Water Temperature °F/°C
70/21
Harvest
Time1
90/32
90/32
10.7-12.5
13.6-15.8
15.4-17.9
100/38
12.5-14.5
14.8-17.2
16.6-19.3
110/43
15.4-17.9
16.6-19.3
18.1-21.0
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Water Temperature °F/°C1
Air Temp. Entering
Condenser
°F/°C
50/10
70/21
90/32
70/21
475
420
370
80/27
430
380
320
90/32
400
325
290
100/38
350
300
270
110/43
290
270
250
1 Based on average ice slab weight of 3.40 - 3.90 lb
OPERATING PRESSURES
Air Temp
Entering
Condenser
°F/°C
Freeze Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG1
50/10
195-255
50-30
125-185
70-90
70/21
195-270
60-30
135-190
80-115
80/27
220-285
62-32
135-195
80-115
90/32
250-320
70-34
175-195
85-115
100/38
290-390
75-35
190-215
115-140
110/43
320-400
80-37
225-250
130-170
1 Suction pressure drops gradually throughout the freeze cycle
Part Number STH025 7/11
235
I0520W
Self-Contained Water-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time
Air Temp.
Entering
Condenser
°F/°C
50/10
70/21
90/32
70/21
9.1-10.7
10.9-12.7
11.7-13.7
80/27
9.4-11.0
11.2-13.1
12.1-14.1
90/32
9.6-11.3
11.6-13.5
12.5-14.5
100/38
9.9-11.6
11.9-13.9
12.9-15.0
110/43
10.2-11.9
12.3-14.3
13.3-15.5
Water Temperature °F/°C
Harvest
Time1
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Water Temperature °F/°C1
Air Temp. Around Ice
Machine °F/°C
50/10
70/21
90/32
70/21
460
395
370
80/27
450
385
360
90/32
440
375
350
100/38
430
365
340
110/43
420
355
330
1 Based on average ice slab weight of 3.4 - 3.9 lb
OPERATING PRESSURES
Freeze Cycle
Harvest Cycle
Air Temp
Entering
Condenser
°F/°C
Discharge
Pressure
PSIG
70/21
220-250
80/27
225-265
90/32
225-270
62-31
170-195
95-115
100/38
225-275
65-32
170-205
100-102
110/43
235-280
65-32
170-205
100-120
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG1
52-30
160-190
85-100
56-30
170-190
90-110
1 Suction pressure drops gradually throughout the freeze cycle
2 Water regulating valve set to maintain 220 psig
3 Condenser Water Usage = 190 gal/100 lb ice @ 90°/70°F
236
Part Number STH025 7/11
I0600 SERIES
I0600A
Self-Contained Air-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
Freeze Time
50/10.0
70/21.1
90/32.2
70/21
7.6-9.0
9.5-11.2
10.2-12.0
80/27
8.8-10.4
9.9-11.7
10.5-12.3
90/32
9.7-11.4
11.0-12.9
11.4-13.4
100/38
11.1-13.1
12.3-14.4
12.8-15.0
Water Temperature °F/°C
Harvest
Time1
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Air Temp. Entering
Condenser °F/°C
Water Temperature °F/°C1
50/10.0
70/21.1
90/32.2
70/21
650
540
505
80/27
575
520
495
90/32
530
475
460
100/38
470
430
415
1 Based on average ice slab weight of 4.12 - 4.75 lb.
OPERATING PRESSURES
Air Temp
Entering
Condenser
°F/°C
Freeze Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG1
50/10
220-255
45-27
140-160
60-80
70/21
220-270
45-28
145-170
70-90
80/27
230-300
50-30
165-185
75-95
90/32
265-345
54-32
180-215
80-105
100/38
300-395
60-35
210-245
85-120
110/43
340-430
65-39
240-280
100-140
1 Suction pressure drops gradually throughout the freeze cycle
Part Number STH025 7/11
237
I0600W
Self-Contained Water-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Around Ice
Machine °F/°C
Freeze Time
Water Temperature °F/°C
50/10
70/21
90/32
70/21
7.6-9.0
9.0-10.6
9.7-11.4
80/27
8.8-10.4
9.1-10.7
9.9-11.7
90/32
9.6-10.6
9.1-10.7
9.9-11.7
100/38
9.1-10.7
9.5-11.2
10.2-12.0
Harvest
Time1
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Air Temp. Around Ice
Machine °F/°C
Water Temperature °F/°C1
50/10
70/21
90/32
70/21
650
565
530
80/27
575
560
520
90/32
565
560
520
100/38
560
540
505
1 Based on average ice slab weight of 4.12 - 4.75 lb.
OPERATING PRESSURES
Air Temp.
Around Ice
Machine
°F/°C
Freeze Cycle
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG 1
65-95
50/10
240-250
36-26
140-190
70/21
240-250
36-26
140-190
65-95
80/27
240-250
40-28
150-195
70-100
90/32
245-255
40-29
160-200
70-100
100/38
245-260
40-30
170-205
75-105
110/43
245-265
40-30
180-210
80-110
1 Suction pressure drops gradually throughout the freeze cycle
2 Water regulating valve set to maintain 240 psig
3 Condenser Water Usage = 157 gal/100 lb ice @ 90°/70°F
238
Part Number STH025 7/11
I0600N
Remote Air-Cooled Condenser Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
Freeze Time
50/10
70/21
90/32
-20/-29 to 70/21
7.9-9.4
9.9-11.7
10.5-12.3
80/27
9.0-10.6
9.9-11.7
10.7-12.6
90/32
9.1-10.7
9.9-11.7
10.7-12.6
100/38
9.9-11.7
10.9-12.8
11.7-13.7
110/43
10.9-12.8
12.0-14.0
12.8-15.0
Water Temperature °F/°C
Harvest
Time1
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Water Temperature °F/°C12
Air Temp. Entering
Condenser
°F/°C
50/10
70/21
90/32
-20/-29 to 70/21
630
520
495
80/27
565
520
485
90/32
560
520
485
100/38
520
480
450
110/43
480
440
415
1 Based on average ice slab weight of 4.12 - 4.75 lb
2 Ratings with JC0895 condenser dice cubes
OPERATING PRESSURES
Freeze Cycle
Air Temp.
Entering
Discharge
Suction
Condenser Pressure
Pressure
°F/°C
PSIG
PSIG
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG1
62-80
-20/-29 to
50/10
210-240
40-29
130-190
70/21
225-250
50-30
130-200
75-95
80/27
245-275
52-31
130-200
75-100
90/32
245-285
52-32
135-200
80-100
100/38
260-315
55-32
140-200
80-100
110/43
290-365
60-34
170-200
85-100
1 Suction pressure drops gradually throughout the freeze cycle
Part Number STH025 7/11
239
I0850 SERIES
I0850A
Self-Contained Air-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time
Air Temp.
Entering
Condenser
°F/°C
Water Temperature °F/°C
50/10
70/21
90/32
10.5-12.1
70/21
9.0-10.4
9.8-11.2
80/27
10.1-11.6
10.8-12.4
11.6-13.4
90/32
11.3-13.0
12.9-14.8
12.9-14.8
100/38
12.9-14.8
13.7-15.7
14.6-16.7
110/43
14.9-17.0
15.8-18.0
16.5-18.8
Harvest
Time1
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Air Temp. Entering
Condenser °F/°C
Water Temperature °F/°C1
50/10
70/21
90/32
70/21
785
735
690
80/27
715
675
630
90/32
645
575
575
100/38
575
545
515
110/43
505
480
460
1 Based on average ice slab weight of 5.75 - 6.50 lb.
OPERATING PRESSURES
Freeze Cycle
Air Temp.
Entering
Discharge
Suction
Condenser Pressure
Pressure
°F/°C
PSIG
PSIG
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG1
50/10
200-255
45-25
125-140
70-90
70/21
200-255
45-26
125-140
75-90
80/27
250-275
50-28
130-160
80-100
90/32
315-260
55-30
160-175
90-115
100/38
330-385
75-34
200-225
130-160
110/43
335-400
78-35
200-230
130-160
1 Suction pressure drops gradually throughout the freeze cycle
240
Part Number STH025 7/11
I0850W
Self-Contained Water-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Around Ice
Machine °F/°C
Freeze Time
Water Temperature °F/°C
50/10
70/21
90/32
70/21
8.4-9.7
9.5-10.9
10.7-12.3
80/27
8.7-10.1
9.7-11.1
10.8-12.6
90/32
9.1-10.5
11.4-13.1 11.0-12.8
100/38
9.5-10.9
10.3-11.9 11.3-13.0
Harvest
Time1
1-2.5
1 Times in minutes
24 HOUR ICE PRODUCTION
Air Temp. Around Ice
Machine °F/°C
Water Temperature °F/°C1
50/10
70/21
90/32
70/21
835
755
680
80/27
810
740
665
90/32
780
640
655
100/38
755
700
645
110/43
730
680
635
1 Based on average ice slab weight of 5.75 - 6.50 lb.
OPERATING PRESSURES
Air Temp.
Around Ice
Machine
°F/°C
Freeze Cycle
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG 1
50/10
230-240
45-28
135-160
70-85
70/21
230-240
60-28
135-160
70-85
80/27
230-240
65-28
135-160
70-85
90/32
240-250
65-28
135-160
70-90
100/38
240-255
70-30
140-160
75-95
110/43
240-265
70-32
140-160
75-95
1 Suction pressure drops gradually throughout the freeze cycle
2 Water regulating valve set to maintain 230 psig
3 Condenser Water Usage = 150 gal/100 lb ice @ 90°/70°F
Part Number STH025 7/11
241
I0850N
Remote Air-Cooled Condenser Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
Freeze Time
50/10
70/21
90/32
-20/-29 to
70/21
9.5-11.0
11.0-12.6
12.0-13.7
80/27
10.0-11.5
10.8-12.4
11.2-12.9
90/32
11.3-13.0
12.1-13.8
13.4-15.4
100/38
12.0-13.7
13.0-14.9
14.1-16.2
110/43
12.8-14.6
13.8-15.8
14.9-17.0
Water Temperature °F/°C
Harvest
Time1
0.75-2.0
1 Times in minutes
24 HOUR ICE PRODUCTION
Water Temperature °F/°C1
Air Temp. Entering
Condenser
°F/°C
50/10
70/21
90/32
-20/-29 to 70/21
750
665
615
80/27
720
675
650
90/32
645
610
555
100/38
615
570
530
110/43
580
540
505
1 Based on average ice slab weight of 5.75 -6.5 lb
OPERATING PRESSURES
Freeze Cycle
Air Temp.
Entering
Discharge
Suction
Condenser Pressure
Pressure
°F/°C
PSIG
PSIG
Discharge
Pressure
PSIG
Harvest Cycle
Suction
Pressure
PSIG1
50/10
200-220
40-21
140-160
70-85
70/21
225-250
50-30
140-160
70-90
80/27
250-265
55-31
140-160
70-95
90/32
260-295
60-32
140-160
70-95
100/38
310-375
65-35
145-170
75-100
110/43
325-390
70-36
145-170
80-100
1 Suction pressure drops gradually throughout the freeze cycle
242
Part Number STH025 7/11
I1000 SERIES
I1000A
Self-Contained Air-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
Freeze Time
50/10
70/21
90/32
70/21
7.5-9.0
8.2-9.8
8.8-10.4
80/27
8.4-10.0
9.3-11.0
9.9-11.8
90/32
9.5-11.3
10.6-12.6
11.4-13.5
100/38
10.7-12.7
11.9-14.1
12.9-15.2
110/43
12.2-14.5
13.4-15.8
14.7-17.4
Water Temperature °F/°C
Harvest
Time1
0.75-2.0
1 Times in minutes
24 HOUR ICE PRODUCTION
Water Temperature °F/°C12
Air Temp. Entering
Condenser
°F/°C
50/10
70/21
90/32
70/21
990
920
870
80/27
900
830
780
90/32
810
735
690
100/38
730
665
620
110/43
650
600
550
1 Based on average ice slab weight of 6.2 -7.2 lb
2 230/50/1 is approximately 12% lower than 230/60/1
OPERATING PRESSURES
Freeze Cycle
Air Temp.
Entering
Discharge
Suction
Condenser Pressure
Pressure
°F/°C
PSIG
PSIG
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG1
50/10
195-255
45-26
130-145
70-90
70/21
220-275
50-27
130-145
70-90
80/27
235-290
50-28
150-165
75-95
90/32
265-330
55-30
165-185
85-110
100/38
300-360
60-35
180-210
95-120
110/43
330-415
60-37
215-235
115-145
1 Suction pressure drops gradually throughout the freeze cycle
Part Number STH025 7/11
243
I1000W
Self-Contained Water-Cooled Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time
Air Temp.
Around Ice
Machine °F/°C
50/10
70/21
90/32
70/21
7.4-8.9
8.5-10.1
9.4-11.1
Water Temperature °F/°C
90/32
7.8-9.3
8.9-10.6
9.7-11.5
100/38
7.9-9.4
9.1-10.8
9.8-11.6
110/43
8.0-9.5
8.0-10.9
9.9-11.8
Harvest
Time1
0.75-2.0
1 Times in minutes
24 HOUR ICE PRODUCTION
Water Temperature °F/°C1
Air Temp. Around Ice
Machine °F/°C
50/10
70/21
90/32
70/21
1000
895
820
80/27
980
875
810
90/32
960
855
800
100/38
950
845
790
110/43
940
835
780
1 Based on average ice slab weight of 6.2 - 7.2 lb
OPERATING PRESSURES
Air Temp.
Around Ice
Machine
°F/°C
Freeze Cycle
Discharge
Pressure
PSIG
Harvest Cycle
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG 1
50/10
215-225
45-22
145-170
75-85
70/21
215-225
45-23
150-170
75-90
80/27
220-225
45-24
150-175
75-95
90/32
220-230
45-25
155-175
80-100
100/38
230-250
50-26
160-195
80-110
110/43
240-260
50-27
170-200
80-115
1 Suction pressure drops gradually throughout the freeze cycle
2 Water regulating valve set to maintain 220 psig
3 Condenser Water Usage = 180 gal/100 lb ice @ 90°/70°F
244
Part Number STH025 7/11
I1000N
Remote Air-Cooled Condenser Model
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
Freeze Time
50/10
70/21
90/32
70/21
7.7-9.2
8.6-10.3
9.5-11.3
80/27
8.5-10.1
9.5-11.3
10.4-12.3
90/32
9.5-11.3
10.6-12.6
11.4-13.5
100/38
10.7-12.7
11.6-13.8
12.4-14.7
110/43
12.2-14.5
12.7-15.0
13.6-16.1
Water Temperature °F/°C
Harvest
Time1
0.75-2.0
1 Times in minutes
24 HOUR ICE PRODUCTION
Water Temperature °F/°C1
Air Temp. Entering
Condenser
°F/°C
50/10
70/21
90/32
70/21
960
870
800
80/27
880
800
740
90/32
800
725
680
100/38
720
670
630
110/43
640
620
580
1 Based on average ice slab weight of 6.2 - 7.2 lb
OPERATING PRESSURES
Freeze Cycle
Air Temp.
Entering
Discharge
Suction
Condenser Pressure
Pressure
°F/°C
PSIG
PSIG
Discharge
Pressure
PSIG
Harvest Cycle
Suction
Pressure
PSIG1
50/10
200-220
35-22
100-165
70-85
70/21
220-260
40-24
100-170
70-90
80/27
245-285
45-25
100-170
70-95
90/32
250-300
50-27
100-170
70-95
100/38
285-330
60-32
130-180
75-100
110/43
300-375
60-32
130-190
80-100
1 Suction pressure drops gradually throughout the freeze cycle
Part Number STH025 7/11
245
I1200 SERIES
S1200A
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
Freeze Time
Water Temperature °F/°C
50/10
70/21
70/21
8.3-9.3
8.9-10.0
9.7-10.8
80/27
9.2-10.3
9.9-11.0
10.6-11.8
Harvest
Time1
90/32
90/32
10.2-11.3
10.9-12.2
11.8-13.2
100/38
11.4-12.6
12.3-13.6
13.3-14.8
110/43
12.9-14.3
13.9-15.5
15.1-16.8
0.75-2.0
1 Times in minutes
24 HOUR ICE PRODUCTION
Air Temp. Entering
Condenser
°F/°C
Water Temperature °F/°C12
50/10
70/21
90/32
70/21
1100
1035
965
80/27
1010
950
890
90/32
925
870
810
100/38
840
785
730
110/43
750
700
650
1 Based on average ice slab weight of 7.5 - 8.25 lb
2 230/50/1 is approximately 12% lower than 230/60/1
OPERATING PRESSURES
Freeze Cycle
Air Temp.
Entering
Discharge
Suction
Condenser Pressure
Pressure
°F/°C
PSIG
PSIG
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG1
50/10
195-255
40-20
135-155
65-85
70/21
220-280
50-22
140-180
70-90
80/27
240-300
50-24
155-180
75-95
90/32
265-340
55-25
165-200
85-100
100/38
310-390
60-28
200-215
95-110
110/43
340-430
60-30
200-240
105-125
1 Suction pressure drops gradually throughout the freeze cycle
246
Part Number STH025 7/11
S1200W
Characteristics vary depending on operating conditions.
CYCLE TIMES
Freeze Time + Harvest Time = Total Cycle Time
Freeze Time
Air Temp.
Around Ice
Machine °F/°C
50/10
70/21
90/32
70/21
7.5-8.7
8.4-9.8
9.7-11.2
11.1-12.8
Water Temperature °F/°C
80/27
8.5-9.9
9.7-11.2
90/32
8.6-10.0
10.1-11.7
11.2-12.9
100/38
8.7-10.1
10.5-12.2
11.2-13.0
110/43
8.8-10.2
10.6-12.3
11.3-13.1
Harvest
Time1
0.75-2.0
1 Times in minutes
24 HOUR ICE PRODUCTION
Water Temperature °F/°C1
Air Temp. Around Ice
Machine °F/°C
50/10
70/21
90/32
70/21
1165
1050
935
80/27
1040
935
830
90/32
1030
900
825
100/38
1020
870
820
110/43
1010
860
815
1 Based on average ice slab weight of 7.25 - 8.25 lb
OPERATING PRESSURES
Air Temp.
Around Ice
Machine
°F/°C
Freeze Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG 1
50/10
225-230
40-20
150-175
70-85
70/21
225-230
42-20
150-185
70-90
80/27
230-250
44-22
160-190
80-95
90/32
240-270
45-22
170-195
80-105
100/38
240-280
50-22
175-205
85-110
110/43
240-280
50-23
180-215
85-115
1 Suction pressure drops gradually throughout the freeze cycle
2 Water regulating valve set to maintain 225 psig
3 Condenser Water Usage = 169 gal/100 lb ice @ 90°/70°F
Part Number STH025 7/11
247
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248
Part Number STH025 7/11
Diagrams
Wiring Diagrams
The following pages contain electrical wiring diagrams.
Be sure you are referring to the correct diagram for the
ice machine you are servicing.
! Warning
Always disconnect power before working on
electrical circuitry.
Some components are wired differently on energy
efficient machines. Please verify your model number
(page 15) to reference the correct diagrams.
WIRING DIAGRAM LEGEND
The following symbols are used on all of the wiring
diagrams:
*
Internal Compressor Overload
(Some models have external
compressor overloads)
**
Fan Motor Run Capacitor
(Some models do not incorporate fan
motor run capacitor)
( )
Wire Number Designation
(The number is marked at each end of
the wire)
—>>—
Multi-Pin Connection
(Electrical Box Side) —>>—
(Compressor Compartment Side)
Part Number STH025 7/11
249
I0300/I0450/I0500/I0520
Self Contained Air & Water-cooled - 1 Ph
250
Part Number STH025 7/11
I0320
Self Contained Air & Water-cooled - 1 Ph
Part Number STH025 7/11
251
I0500
Remote Air-cooled - 1Ph
252
Part Number STH025 7/11
I0600/I0850/I1000/I1200
Self Contained Air & Water-cooled - 1 & 3 Ph
Part Number STH025 7/11
253
I0600/I0850/I1000
Remote Condenser Air-cooled - 1 & 3 Ph
254
Part Number STH025 7/11
I1400/I1800
Self Contained Air & Water-cooled - 1 & 3 Ph
Part Number STH025 7/11
255
I1400/I1800
Remote Air-cooled - 1 & 3 Ph
256
Part Number STH025 7/11
Electronic Control Board
Bin Switches
Bin
Thermostat
USB
Display Light
Micro Light
Clean Light
Harvest Light
SL-1 Light
SL-2 Light
Thermistors
T1
T2
Dump Valve
T3
T4
Left Bin Switch Light
Transformer
Right Bin Switch Light
Water Level Probe Light
Display
Ice Thickness Probe Light
RS485
RT Harvest
Bin LED
LuminIce
Battery
Compressor
LT Harvest
Water
Level
Probe
Fuse
Relay Lights
Pump
Water Pump
AuCS
Water
Remote CVD
V
C
LPC
HPC1
HPC2
Ice
Thickness
Probe
Compressor
L1
Dump
L2
Not Used
CVD
Contactor
HPC
Right Harvest Valve
Water Inlet Valve
Part Number STH025 7/11
Left Harvest Valve
Dump Valve
257
Refrigeration Tubing Schematics
SELF-CONTAINED AIR OR WATER -COOLED
I0300/I0320/I0520/I0450/I0500/I0600/I0850/I1000
T4 Thermistor
E VA P O R ATO R
H E AT
EXCHANGER
EXPANSION
VALVE
T3 Thermistor
H O T G A S S O L E N O I D VA LV E
X
A I R O R WAT E R
CONDENSER
COMPRESSOR
STRAINER
T2 Thermistor
DRIER
RECEIVER
( WAT E R C O O L E D O N LY )
T1 Thermistor
I1400/I1800
T3 Thermistor
HEAT
EXCHANGER
T4 Thermistor
EXPANSION
VALVE
EXPANSION
VALVE
HARVEST
SOLENOID VALVE
COMPRESSOR
x
x
EVAPORATOR
HARVEST
SOLENOID VALVE
STRAINER
DRIER
T2 Thermistor
RECEIVER
T1 Thermistor
258
CONDENSER
Part Number STH025 7/11
REMOTE CONDENSER MODELS
I0500/I0600/I0850/I1000
T4 Thermistor
EVAPORATOR
HEAT
EXCHANGER
EXPANSION
VALVE
T3 Thermistor
STRAINER
X
COMPRESSOR
HOT GAS SOLENOID VALVE
CHECK VALVE
LIQUID
LINE
SOLENOID
VALVE
REMOTE
CONDENSER
HARVEST PRESSURE
REGULATING VALVE
HEAD
PRESSURE
CONTROL
VALVE
X
DRIER
T1 Thermistor
H.P.R. SOLENOID
VALVE
CHECK VALVE
R
B
C
T2 Thermistor
RECEIVER
ACCESS
VALVE
RECEIVER
I1400/I1800
T3 Thermistor
HEAT
EXCHANGER
T4 Thermistor
EXPANSION
VALVE
EXPANSION
VALVE
LLSV
x
x
EVAPORATOR
HARVEST
SOLENOID VALVE
HARVEST
SOLENOID VALVE
COMPRESSOR
STRAINER
DRIER
CHECK VALVE
x
HPR VALVE
CHECK VALVE
RECEIVER
ACCESS
VALVE
T1 Thermistor
HEAD
PRESSURE
CONTROL
VALVE
REMOTE
CONDENSER
T2 Thermistor
RECEIVER
Part Number STH025 7/11
259
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260
Part Number STH025 7/11
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Part Number STH025 7/11
261
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262
Part Number STH025 7/11
Manitowoc Ice
2110 South 26th Street, P.O. Box 1720
Manitowoc, WI 54221-1720, USA
Ph: 920-682-0161 Fax: 920-683-7589
Visit us online at: www.manitowocice.com
© 2011 Manitowoc
Part Number STH025 7/11
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