Hoshizaki Ice Maker Manuals and Service Guides
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HoshizakiHoshizaki America, Inc.

“A Superior Degree

of Reliability”

www.hoshizaki.com

Modular Crescent Cuber

Models KM-320MAH, MWH

KM-515MAH, MWH, MRH KM-600MAH KM-650MAH, MWH(-M), MRH KM-901MAH, MWH, MRH/3

SERVICE MANUAL

Number: 73196

Issued: 4-29-2013

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Contents Modular Crescent Cuber Models KM-320MAH, MWH Hoshizaki AMERICA, INC Contents Page Page Important Safety Information Additional Warning for Remote Models Air-Cooled Models MAH Construction and Water/Refrigeration Circuit DiagramModel Shown KM-515MAH Model Shown KM-515MWH Water-Cooled Models MWH-MModel Shown KM-901MRH Remote Models MRH/3Water/Refrigeration Circuit Diagram Discharge Line Freeze Pump- Out Timer Operation Sequence of Operation Flow ChartG Control Board without Harvest Pump Minute Harvest Cycle Freeze Cycle Pump-Out CycleIcemaker Off Ice Level Lowered Bin FullIcemaker Off Control Board with Harvest Pump TimerService Diagnosis G Control Board without Harvest Pump Timer Diagnosis Page Page Page OFF Mechanical Bin Control Shutdown Control Board Thermostatic Bin Control TBCControl Board with Harvest Pump Timer Diagnosis Page Page Page Every cycle After 2nd freeze cycle Shutdown Mechanical Bin Control Control Correct LED Board Control Board CheckThermostatic Bin Control Check Bin Control CheckMechanical Bin Control Check Cycle at Shutdown Mechanical Bin Control ActivationModel Shown KM-901MH/3 Mechanical Bin Control CleaningFloat Switch Check Float Switch Check and CleaningFloat Switch Cleaning Thermistor Check No Ice Production Diagnostic TablesNo Ice Production Possible Cause Freeze-Up Possible Cause Harvest Cycle Freeze-UpFreeze-Up Possible Cause Low Ice ProductionLow Ice Production Possible Cause Long Harvest Cycle Low Ice Production Possible Cause Long Freeze Cycle III. Controls and Adjustments Control Board Control Board LayoutControl Board Part Number 2A3792-01 No. of Beeps Type of Alarm Every 3 sec LED Lights and Audible Alarm SafetiesSequence Step Energized Time LEDs are On Components Min Max AvgControl Board Default Dip Switch Settings Settings and AdjustmentsS4 Dip Switch G Control Boards S5 Dip Switch Control Board OnlyPump-Out Timer S4 dip switch 3 Harvest Timer S4 dip switch 1S4 Dip Switch Setting Time Sec Control Board 1st Pump-Out S4 Dip Switch Setting Frequency Pump-Out Frequency Control S4 dip switch 5Bin Control Freeze Timer S4 dip switch 9 Factory Use S4 dip switchControl Board S4 Dip Switch Setting Pump Motor Time sec S4 Dip Switch Setting Time MinFloat Switch Selector S5 dip switch 1 G Control Board Control SwitchRefill Counter S5 dip switch 2 through 5 G Control Board Refrigeration Circuit Service Information IV. Refrigeration Circuit and Component Service InformationRefrigerant Recovery Evacuation and Recharge R-404A BrazingPage Water Regulating Valve Adjustment water-cooled model Component Service InformationComponent Maintenance Schedule MaintenanceFrequency Area Task Remove the water from the icemaker water line VI. Preparing the Appliance for Periods of Non-UseRemove the water from the water tank Page VII. Disposal KM-320MAH VIII. Technical Information Specification SheetsWater Cooled Condenser KM-320MWHKM-515MAH KM-515MWH KM-515MRH KM-600MAH KM-650MAH KM-650MWH KM-650MWH-M Awaiting DataKM-650MRH KM-901MAH KM-901MWH KM-901MRH KM-901MRH3 Performance Data 337 352730 430435 501980 1090436 500940 960452 4911000 198503 5921040 1190562 6611180 12901080 6201060 744Awaiting Data 564 6321220 1320732 8741600 1710827 9121480 1550785 8891590 1770815 8991670 1830Diagrams Without Harvest Pump Timer Relays Wiring DiagramsKM-650MAH, KM-650MWH, KM-901MAH, KM-901MWH KM-650MRH, KM-901MRH KM-901MRH3 KM-515MAH Diagrams With Harvest Pump Timer RelaysKM-650MAH, KM-650MWH, KM KM-650MWH-M KM-650MRH
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KM-320MAH, MRH KM-600MAH KM-650MAH, MWH(-M), MRH KM-901MAH, MRH/3 specifications

Hoshizaki, a leading manufacturer in the food service equipment sector, offers a diverse range of ice-making machines that excel in efficiency, durability, and innovative technology. Among the notable models are the Hoshizaki MWH KM-515MAH, MWH(-M), MRH KM-901MAH, MRH KM-600MAH, KM-650MAH, and KM-320MAH. Each model brings unique features designed to meet varying commercial ice production needs.

The Hoshizaki MWH KM-515MAH is particularly recognized for its high ice production capacity, generating up to 515 pounds of ice per day. This model incorporates advanced technology that ensures consistent ice quality and purity. The MWH(-M) variant often includes modifications to suit specific operational environments, ensuring reliability in diverse settings.

Similarly, the MRH KM-901MAH stands out with its ability to produce a staggering 901 pounds of ice per day, making it ideal for high-volume establishments. This model is equipped with Hoshizaki's unique "cubelet" technology, producing a soft, chewable ice perfect for beverages. It also features a robust stainless steel construction, enhancing its durability and resistance to corrosion.

The MRH KM-600MAH offers 600 pounds of daily ice output, while the KM-650MAH enhances that capacity to 650 pounds. Both machines prioritize energy efficiency and come with built-in energy-saving modes. These models feature advanced ice sensing technology that monitors production levels to optimize energy consumption and reduce waste.

On the other hand, the KM-320MAH is designed for smaller establishments, with a daily ice production rate of 320 pounds. Despite its smaller footprint, it maintains high production efficiency and is equipped with features like a built-in storage bin, saving space while ensuring a reliable ice supply.

Across these models, Hoshizaki employs various technologies, including air-cooled and water-cooled systems, offering flexibility depending on installation requirements. The ice machines are designed with user-friendly controls and features like self-cleaning capabilities, making maintenance straightforward and less time-consuming.

In summary, Hoshizaki's ice machines, including the MWH KM-515MAH, MRH KM-901MAH, and others, deliver exceptional ice production, durability, and efficiency tailored to meet the demands of any commercial kitchen or service establishment. With a commitment to quality, Hoshizaki continues to be a trusted choice for businesses needing reliable ice-making solutions.
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