Hoshizaki KM-515MAH Parts Manual & Thermistor Testing Guide
Page 42

A. Control Board Layout

1. "E" Control Board

"E" Control Board

• "ALARM RESET" Button

 

• "OUTPUT TEST" Button

• S4 Dip Switch

(used to test relays on control board)

• Freeze Timer

LED (yellow)

• Harvest Backup

Timer LED (orange)

• Alarm Buzzer

• POWER OK LED (red) (lights when 10.5VAC is supplied to K2 connector)

• Relay LEDs

(4) (indicate which relays are energized and which K1 connector pins are energized

• LED 2 (X2 Relay)

LED 2 on:

K1 Connector Pin #2

LED 2 off:

K1 Connector Pin #3

• LED 3 (X3 Relay)

LED 3 on:

K1 Connector Pin #5 LED 3 off:

K1 Connector Pin #4 (energized in freeze)

• LED 4 (X4 Relay) K1 Connector Pin #6

• LED 1 (X1 Relay)

K1 Connector Pin #1, #9• K2 Connector

Control Transformer

(10.5VAC)

•K3 (white) Connector

Thermistor (harvest control and high temperature safety)

•K4 (red) Connector

Open

•Part Number

•K5 (black) Connector

Float Switch (water level)

Microprocessor (control board revision level indicated on label on side of relay)

• K1 Connector

Pins #1 through #10

#1, 9 Magnetic Contactor or Compressor Relay

#2 Hot Gas Valve #3 Fan Motor

Liquid Line Valve

#4 Pump Motor (icemaking) #5 Pump Motor (pump-out) #6 Inlet Water Valve

#7, 10 Component Power Supply

#8 Open

Switch for "C" control board and "ALPINE" control board (service control board only) Set to "ALP" for appliances covered in this manual.

"E" Control Board

Part Number 2A1410-02

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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 Construction and Water/Refrigeration Circuit Diagram Air-Cooled Models MAHModel Shown KM-515MAH Water-Cooled Models MWH-M Model Shown KM-515MWHRemote Models MRH/3 Model Shown KM-901MRHWater/Refrigeration Circuit Diagram Discharge Line Freeze Pump- Out G Control Board without Harvest Pump Sequence of Operation Flow ChartTimer Operation Minute Harvest Cycle Freeze Cycle Pump-Out CycleBin Full Icemaker Off Ice Level LoweredIcemaker Off Timer Control Board with Harvest PumpService Diagnosis G Control Board without Harvest Pump Timer Diagnosis Page Page Page OFF Shutdown Control Board Thermostatic Bin Control TBC Mechanical Bin ControlControl Board with Harvest Pump Timer Diagnosis Page Page Page Every cycle After 2nd freeze cycle Shutdown Mechanical Bin Control Control Board Check Control Correct LED BoardBin Control Check Thermostatic Bin Control CheckCycle at Shutdown Mechanical Bin Control Activation Mechanical Bin Control CheckMechanical Bin Control Cleaning Model Shown KM-901MH/3Float Switch Check and Cleaning Float Switch CheckFloat Switch Cleaning Thermistor Check Diagnostic Tables No Ice ProductionNo Ice Production Possible Cause Freeze-Up Freeze-Up Possible Cause Harvest CycleLow Ice Production Freeze-Up Possible CauseLow Ice Production Possible Cause Long Harvest Cycle Low Ice Production Possible Cause Long Freeze Cycle III. Controls and Adjustments Control Board Layout Control BoardControl Board Part Number 2A3792-01 Sequence Step LED Lights and Audible Alarm SafetiesNo. of Beeps Type of Alarm Every 3 sec Energized Time LEDs are On Components Min Max AvgControl Board S4 Dip Switch G Control Boards Settings and AdjustmentsDefault Dip Switch Settings S5 Dip Switch Control Board OnlyHarvest Timer S4 dip switch 1 Pump-Out Timer S4 dip switch 3S4 Dip Switch Setting Time Sec Pump-Out Frequency Control S4 dip switch 5 Control Board 1st Pump-Out S4 Dip Switch Setting FrequencyBin Control Control Board S4 Dip Switch Setting Pump Motor Time sec Factory Use S4 dip switchFreeze Timer S4 dip switch 9 S4 Dip Switch Setting Time MinControl Switch Float Switch Selector S5 dip switch 1 G Control BoardRefill Counter S5 dip switch 2 through 5 G Control Board IV. Refrigeration Circuit and Component Service Information Refrigeration Circuit Service InformationRefrigerant Recovery Brazing Evacuation and Recharge R-404APage Component Service Information Water Regulating Valve Adjustment water-cooled modelComponent Maintenance Maintenance ScheduleFrequency Area Task VI. Preparing the Appliance for Periods of Non-Use Remove the water from the icemaker water lineRemove the water from the water tank Page VII. Disposal VIII. Technical Information Specification Sheets KM-320MAHKM-320MWH Water Cooled CondenserKM-515MAH KM-515MWH KM-515MRH KM-600MAH KM-650MAH KM-650MWH Awaiting Data KM-650MWH-MKM-650MRH KM-901MAH KM-901MWH KM-901MRH KM-901MRH3 Performance Data 730 352337 430980 501435 1090940 500436 9601000 491452 1981040 592503 11901180 661562 12901060 6201080 744Awaiting Data 1220 632564 13201600 874732 17101480 912827 15501590 889785 17701670 899815 1830Wiring Diagrams Diagrams Without Harvest Pump Timer RelaysKM-650MAH, KM-650MWH, KM-901MAH, KM-901MWH KM-650MRH, KM-901MRH KM-901MRH3 Diagrams With Harvest Pump Timer Relays KM-515MAHKM-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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