Hoshizaki MRH/3, MWH KM-515MAH, MRH KM-901MAH, MWH(-M) Control Board with Harvest Pump, Timer

Page 16

"G" Control Board With Harvest Pump Timer Operation Sequence Flow Chart

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cycle

 

 

 

 

1. 1-Minute

2. Harvest Cycle

 

3. Freeze Cycle

 

 

 

 

4. Pump-Out Cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Steps

 

Fill Cycle

 

 

• Maximum inlet water valve time: 6 min. or the length of

 

 

• Minimum freeze time: 5 min.

• Factory set for every

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

harvest minus 50 sec. (S4 dip switch 7), whichever is shorter.

 

 

• Maximum freeze time: freeze timer

10th cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Maximum harvest time: 20 min.

 

 

setting (S4 dip switch 9 & 10)

(except KM-515M_H)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thermistor in

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(S4 dip switch 5 & 6)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 to 3-min. harvest timer in

 

 

 

 

 

 

 

 

 

 

 

 

• Pump motor stops for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

control

 

 

 

 

 

 

control (S4 dip switch 1 & 2)

 

 

 

 

 

 

 

5-min. minimum

 

 

FS in control

 

2 sec., then reverses

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

for 10/20 sec.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Harvest Pump

 

 

 

freeze timer in

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(S4 dip switch 3 & 4)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Timer

 

 

 

control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Startup

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

50 sec.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FS check

 

 

 

 

FS closed

 

 

 

 

 

 

 

 

 

FS check

 

 

FS closed

 

 

 

 

 

FS opens or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Comp continues

 

 

 

 

 

 

WV energized

Comp energized

 

 

 

 

PM energized

 

 

Comp continues

 

 

freeze timer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FMR continues

 

 

 

 

 

 

 

 

 

 

 

 

FMR energized

 

 

 

 

WV de-energized

 

 

FMR continues

 

 

terminates

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HGV energized

 

 

 

 

 

 

 

 

 

 

 

 

HGV energized

Thermistor temperature reaches

 

 

FM energized

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PM de-energizes for 2 sec.,

 

 

 

 

 

 

 

 

 

 

 

 

WV energized

 

 

LLV energized

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FS open

48°F (9°C) (3.9 kΩ or less). Harvest

 

 

 

 

 

 

then reverses for 10/20 sec.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PM energized

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

timer starts (1 to 3 min.).

 

 

HGV de-energized

 

 

 

 

FM de-energized

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FS open

 

 

 

 

 

 

LLV de-energized

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

If FS is open, Comp stops and cycle returns to 1-min. fill.

2. "G" Control Board with Harvest Pump

16

Shutdown and Restart

MBC Operation

1. Bin Full

Shutdown Delay:

•Fill Cycle–15 sec. after activation.

•Harvest Cycle–At the end of the harvest cycle, or up to 15 sec. into the

freeze cycle if activated at the end of the harvest cycle.

•Freeze Cycle–15 sec. after activation if activated at least 15 sec. before

the 5-min. short cycle protection timer terminates. Otherwise, at the end of the next harvest cycle.

2. Icemaker Off

All components de-energized.

3. Ice Level Lowered

Icemaker starts at

"1. 1-Minute Fill Cycle."

To 1 above

Timer Operation

MBC open (MBC actuator paddle engaged)

Yellow "BC OPEN" LED continues. All

MBC closed

Green "BC CLOSED" LED off

components de‑energized.

(MBC actuator paddle disengaged)

Yellow "BC OPEN" LED on

 

Green "BC CLOSED" LED on

 

 

 

Yellow "BC OPEN" LED off

Legend:

 

 

 

Comp–compressor

Components Energized when the Control Switch is in the "WASH" Position

FM–fan motor

The "WASH" position on the control switch is used when cleaning and sanitizing the icemaker. When in the "WASH" position, power is

FMR–fan motor-remote

supplied to the pump motor. With the cleaning valve closed, the cleaner and sanitizer flow over the outside of the evaporator plate assembly.

FS–float switch

With the cleaning valve open, the cleaner and sanitizer flow over both the outside and the inside of the evaporator plate assembly.

HGV–hot gas valve

Note: Close the cleaning valve after cleaning and sanitizing are complete, otherwise the icemaker will not restart when the control switch is

LLV–liquid line valve

placed in the "ICE" position.

MBC–mechanical bin control

 

PM–pump motor

 

WV–inlet water valve

 

Page 15 Page 17
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Page 15 Page 17
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 Water-Cooled Models MWH-M Model Shown KM-515MWHRemote Models MRH/3 Model Shown KM-901MRHWater/Refrigeration Circuit Diagram Discharge Line Freeze Pump- Out Sequence of Operation Flow Chart Timer OperationG Control Board without Harvest Pump Minute Harvest Cycle Freeze Cycle Pump-Out CycleIcemaker Off Ice Level Lowered Bin FullIcemaker 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 No Ice Production Diagnostic TablesNo Ice Production Possible Cause Freeze-Up Freeze-Up Possible Cause Harvest CycleFreeze-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 LED Lights and Audible Alarm Safeties No. of Beeps Type of Alarm Every 3 secSequence Step Energized Time LEDs are On Components Min Max AvgControl Board Settings and Adjustments Default Dip Switch SettingsS4 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 Factory Use S4 dip switch Freeze Timer S4 dip switch 9Control 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 Brazing Evacuation and Recharge R-404APage 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 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 352 337730 430501 435980 1090500 436940 960491 4521000 198592 5031040 1190661 5621180 1290620 10801060 744Awaiting Data 632 5641220 1320874 7321600 1710912 8271480 1550889 7851590 1770899 8151670 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
Related manuals
Manual 50 pages 28.96 Kb Manual 40 pages 33.48 Kb

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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