"G" Control Board Sequence Flow Chart

KM-1301SAH/3, KM-1301SWH/3, and KM-1301SRH/3

Cycle Steps

 

 

 

 

 

1. 1-Minute

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Harvest Cycle

 

 

 

 

 

 

3. Freeze Cycle

 

 

 

 

4. Pump-Out Cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fill Cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Minimum freeze time: 5 min.

• Factory set for every

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• WV time: 6 min. or the length of harvest minus 0 or

 

 

• Maximum freeze time: freeze timer setting

10th cycle (S4 dip

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

(S4 dip switch 9 & 10)

switch 5 & 6)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOT ADJUST S4 dip switch 7 on this model.

 

 

 

 

 

 

 

 

 

 

 

 

• Pump motor stops

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Maximum harvest time: 20 min.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

for 2 sec., then

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

reverses for 10/20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thermistor

 

 

 

 

1 to 3-min. timer in control

 

 

5-min. timer in

 

 

F/S in control

 

 

sec. (S4 dip switch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

in control

 

 

 

 

 

 

(S4 dip switch 1 & 2)

 

 

 

 

 

control

 

 

 

 

 

 

 

 

3 & 4)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Harvest Pump

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Timer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Initial startup

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0 or 50 sec.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

begins here

 

 

 

 

 

 

 

 

 

 

F/S closed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F/S closed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F/S check

 

 

 

 

 

 

 

PM energized

 

 

F/S check

 

 

 

 

 

 

F/S open or freeze

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

after 5-sec.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WV de-energized

 

Comp continues

 

Comp continues

delay

 

 

WV energized

 

 

WV continues

 

 

 

 

 

timer expires

 

 

 

 

Thermistor temperature

 

 

 

 

 

 

 

 

FMR continues

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Comp energized

 

 

 

 

 

 

 

FMR continues

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

reaches 48°F (9°C)

 

 

 

 

 

 

 

 

 

 

 

HGV energized

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PM continues

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F/S open

 

 

FMR energized

(3.9 kΩ or less).

 

 

 

 

 

 

 

 

 

 

 

PM de-energizes for 2 sec.,

 

 

 

 

 

 

 

 

 

 

 

 

 

HGV energized

 

 

 

 

 

 

 

FMS energized

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Harvest timer starts.

 

 

 

 

 

 

 

 

 

 

 

then reverses for 10/20 sec.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LLV energized

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F/S open

 

 

 

 

 

FM de-energized

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HGV de-energized

 

 

 

 

LLV de-energized

 

 

 

 

 

 

 

 

If F/S is open, compressor stops and cycle returns to 1-Minute Fill Cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Sequence Flow Chart

20

Shutdown 1. Bin Full and Restart Within 10 sec.

after ice contacts thermostatic bulb, unit shuts down.

BC Operation

2. Icemaker Off

All components de-energized.

3. Ice Level Lowered

No ice touching thermostatic bulb. Icemaker starts at

"1. 1-Minute Fill Cycle."

To 1 above

Ice contacts thermostatic bulb

Legend:

BC–bin control Comp–compressor FM–fan motor FMR–fan motor-remote F/S–float switch HGV–hot gas valve LLV–liquid line valve PM–pump motor WV–inlet water valve

BC-open

BC closed

All components

NOTE: Green "BC CLOSED" LED on continuously

de-energized

when the K4 jumper is in place.

 

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

The "WASH" position on the control switch is used when cleaning and sanitizing the unit. When in the "WASH" position, power is supplied to the pump motor. With the cleaning valve closed, the cleaner and sanitizer flow over the outside of the evaporator plate assembly. With the cleaning valve open, the cleaner and sanitizer flow over both the outside and the inside of the evaporator plate assembly.

Note: Close the cleaning valve after cleaning and sanitizing are complete, otherwise the unit will not restart when the control switch is placed in the "ICE" position.

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Hoshizaki KM-1301SWH/3, KM-1301SAH/3, KM-1301SRH/3 service manual Sequence Flow Chart, Icemaker Off, Ice Level Lowered

KM-1301SWH/3, KM-1301SRH/3, KM-1301SAH/3 specifications

The Hoshizaki KM-1301SRH/3, KM-1301SWH/3, and KM-1301SAH/3 are advanced ice makers designed for commercial use, addressing a wide variety of needs in restaurants, hotels, and bars. These models are known for their efficiency, durability, and innovative technologies that ensure the production of high-quality ice.

One of the standout features of these units is their ability to produce a high volume of ice, reaching up to 1,300 pounds per day, which is crucial for establishments with heavy ice demands. The machines utilize advanced cooling technology, allowing for faster ice production and minimizing the time required to refill ice bins. This makes them ideal for busy settings where speed and efficiency are paramount.

The KM-1301 series employs a unique stainless steel exterior that not only ensures longevity and resistance to corrosion but also enhances the aesthetic appeal of any commercial kitchen or bar. The interior is designed for easy cleaning, helping to maintain hygiene standards vital for food safety.

These ice makers utilize the proprietary Hoshizaki Cubelet Ice system, producing small, chewy ice cubes that are perfect for various beverages and food displays. The advanced design of the ice-making mechanism ensures that ice is formed quickly and efficiently, reducing energy consumption. Additionally, Hoshizaki’s CycleSaver technology optimizes the production process by reducing the amount of water used, making these machines environmentally friendly.

Another characteristic is their self-diagnostic capability, which allows for real-time monitoring of unit performance and quicker troubleshooting, minimizing downtime. The built-in alerts notify operators of any issues or maintenance needs, ensuring that the ice-making process remains uninterrupted.

The KM-1301 series also provides user-friendly controls that allow easy adjustments and monitoring of ice production settings. This flexibility enables businesses to meet varying ice demands based on seasonality or special events.

In summary, the Hoshizaki KM-1301SRH/3, KM-1301SWH/3, and KM-1301SAH/3 ice makers are exemplary choices for commercial ice production. With their high output, durable design, energy efficiency, innovative technologies, and user-friendly features, they cater effectively to the rigorous demands of the foodservice industry while maintaining a commitment to quality and sustainability.