Hoshizaki America, Inc.
Hoshizaki
Stackable Square Cuber
Model
IM-500SAA
SERVICE MANUAL
“A Superior Degree
of Reliability”
Number: M029-897
Issued: 2-8-2013
Revised: 5-19-2014
IMPORTANT
This manual should be read carefully before the appliance is serviced. Read
the warnings and guidelines contained in this manual carefully as they provide
essential information for the continued safe use, service, and maintenance of the
appliance. Retain this manual for any further reference that may be necessary.
CONTENTS
Important Safety Information ................................................................................................. 4
I. Construction and Water/Refrigeration Circuit Diagram ....................................................... 6
A. Construction.................................................................................................................. 6
B. Water/Refrigeration Circuit Diagram.............................................................................. 7
II. Sequence of Operation and Service Diagnosis................................................................. 8
A. Sequence of Operation Flow Chart............................................................................... 8
B. Sequence of Operation ................................................................................................. 9
1. Startup Cycle............................................................................................................ 9
2. Harvest Cycle .......................................................................................................... 9
3. Freeze Cycle............................................................................................................ 9
4. Shutdown............................................................................................................... 10
C. Service Diagnosis Table...............................................................................................11
D. Bin Control Check and Cleaning ................................................................................. 14
1. Bin Control Check .................................................................................................. 14
2. Bin Control Cleaning.............................................................................................. 15
E. Evaporator Thermistor Check...................................................................................... 16
III. Controls and Adjustments............................................................................................... 17
A. Control Switch............................................................................................................. 17
B. Control Board .............................................................................................................. 17
1. Control Board Layout ............................................................................................. 18
C. Control Buttons............................................................................................................ 19
D. Control Board Settings ................................................................................................ 20
E. Control Board Information Display .............................................................................. 23
F. Control Board Model Code Setting .............................................................................. 25
1. Control Board Replacement................................................................................... 25
2. Checking or Changing the Control Board Model Code.......................................... 25
G. Error Codes ................................................................................................................ 27
H. Quick Adjustments ...................................................................................................... 28
1. Dimple Diameter .................................................................................................... 28
2. Ice Clarity .............................................................................................................. 29
IV. Refrigeration Circuit and Component Service Information.............................................. 30
A. Refrigeration Circuit Service Information .................................................................... 30
B. Component Service Information.................................................................................. 32
V. Maintenance .................................................................................................................... 34
VI. Preparing the Icemaker for Periods of Non-Use............................................................. 35
VII. Disposal......................................................................................................................... 36
VIII. Technical Information.................................................................................................... 37
A. Specification Data ....................................................................................................... 37
B. Performance Data ....................................................................................................... 38
C. Wiring Diagram ........................................................................................................... 39
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Important Safety Information
Throughout this manual, notices appear to bring your attention to situations which could
result in death, serious injury, damage to the appliance, or damage to property.
WARNING
NOTICE
IMPORTANT
Indicates a hazardous situation which could result in death or
serious injury.
Indicates a situation which could result in damage to the
appliance or property.
Indicates important information about the use and care of the
appliance.
WARNING
The appliance should be destined only to the use for which it has been expressly
conceived. Any other use should be considered improper and therefore dangerous.
The manufacturer cannot be held responsible for injury or damage resulting from
improper, incorrect, and unreasonable use. Failure to service and maintain the
appliance in accordance with this manual will adversely affect safety, performance,
component life, and warranty coverage and may result in costly water damage.
To reduce the risk of death, electric shock, serious injury, or fire, follow basic
precautions including the following:
• Only qualified service technicians should install and service this appliance.
• The appliance must be installed in accordance with applicable national, state, and
local codes and regulations. Failure to meet these code requirements could result in
death, electric shock, serious injury, fire, or damage to the appliance.
• Electrical connection must be hard-wired and must meet national, state, and local
electrical code requirements. Failure to meet these code requirements could result
in death, electric shock, serious injury, fire, or damage.
• The icemaker requires an independent power supply of proper capacity. See the
nameplate for electrical specifications. Failure to use an independent power supply
of proper capacity can result in a tripped breaker, blown fuse, damage to existing
wiring, or component failure. This could lead to heat generation or fire.
• THE ICEMAKER MUST BE GROUNDED. Failure to properly ground the icemaker
could result in death or serious injury.
• To reduce the risk of electric shock, do not touch the control switch with damp
hands.
• Move the control switch to the "OFF" position and turn off the power supply before
servicing. Lockout/Tagout to prevent the power supply from being turned back on
inadvertently.
• Do not make any alterations to the appliance. Alterations could result in electric
shock, serious injury, fire, or damage.
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WARNING, continued
• The 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 or instruction concerning use of the
appliance by a person responsible for their safety.
• Children should be properly supervised around the appliance.
• Do not climb, stand, or hang on the appliance or allow children or animals to do so.
Serious injury could occur or the appliance could be damaged.
• Do not use combustible spray or place volatile or flammable substances near the
appliance. They might catch fire.
• Keep the area around the appliance clean. Dirt, dust, or insects in the appliance
could cause harm to individuals or damage to the appliance.
NOTICE
• Follow the instructions in this manual carefully to reduce the risk of costly water
damage.
• In areas where water damage is a concern, install in a contained area with a floor
drain.
• Install the appliance in a location that stays above freezing. Normal operating
ambient temperature must be within 45°F to 100°F (7°C to 38°C).
• Do not leave the appliance on during extended periods of non-use, extended
absences, or in sub-freezing temperatures. To properly prepare the appliance for
these occasions, follow the instructions in "VI. Preparing the Icemaker for Periods of
Non-Use."
• Do not place objects on top of the appliance.
• The dispenser unit/ice storage bin is for ice use only. Do not store anything else in
the dispenser unit/ice storage bin.
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