Hoshizaki KM-1601SRH/3 Thermistor Check, Adjustment of Water Regulating Valve water-cooled model

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E. Thermistor Check

To check thermistor resistance, follow the steps below.

1)Turn off the power supply.

2)Remove the front panel, then move the control switch to the "OFF" position.

3)Remove the control box cover.

4)Remove the thermistor.

5)Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 minutes.

6)Disconnect the white thermistor connector from CB WHITE K3 connector and check the resistance between thermistor leads. Normal range is 4.7 to 6.2 kΩ. If outside the normal range, replace the thermistor. See "V.B. Important Notes for Component Replacement." If within the normal range, continue to the next step.

7)Replace the thermistor in its correct position. See "V.B. Important Notes for Component Replacement."

8)Reconnect the white thermistor connector to CB WHITE K3 connector.

9)Replace the control box cover in its correct position, then turn on the power supply.

10)Move the control switch to the "ICE" position.

11)Once the harvest cycle starts, begin timing the harvest cycle.

12)The harvest timer should terminate and end the harvest cycle within 2 to 3 minutes. If the harvest timer does not terminate and end the harvest cycle, the harvest timer is bad and CB must be replaced.

Legend: CB–control board

F. Adjustment of Water Regulating Valve (water-cooled model)

WRV is factory set, and generally no adjustment is required. However, when necessary, adjust WRV using the procedure below.

1)Prepare a thermometer to check the condenser drain temperature. Attach a pressure gauge to the high-side line of the system.

2)Five minutes after a freeze cycle starts, confirm that the thermometer reads 104°F to 115°F (40°C to 46°C). If it does not, use a flat blade screwdriver to rotate the adjustment screw on WRV until the temperature is in the proper range (rotate counterclockwise to raise the temperature or clockwise to lower the temperature). See Fig. 3. Next, check that the reference pressure is in the range indicated in the Head Pressure table in the Performance Data section. If it is not in the proper range, verify the refrigerant charge.

3)Check that the condenser drain temperature is stable.

Legend: WRV–water-regulating valve

Adjustment Screw

Top View

CCW – Higher

CW – Lower

Fig. 3

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Contents Superior Degree Reliability Number Issued Revised Hoshizaki AMERICA, INC Contents Page Indicates important information about the use and care Important Safety InformationSerious injury UnitSpecifications Icemaker KM-1601SAH air-cooledKM-1601SAH3 air-cooled KM-1601SWH water-cooled Water Cooled CondenserKM-1601SWH3 water-cooled 12.8 a 5 Min. Freeze AT 104F / WT 80F 100 1512 1482 1317 Crescent Cube 100 1475 1462 1261 Crescent Cube 100 1510 1426 1184 Crescent Cube 100 1520 1482 1273 Crescent Cube 100 1468 1465 1231 Crescent Cube Condenser Unit URC-21FURC-22F II. General Information Construction KM-1601SAH/3 air-cooledKM-1601SWH/3 water-cooled WRVKM-1601SRH/3 remote air-cooled Sequence of Operation Sequence Cycles and ShutdownS4 Dip Switch Setting Pump-Out 1st Pump-Out Frequency Pump-Out CycleKM-1601SWH/3 and KM-1601SRH/3 E Control Board Harvest Cycle Sequence Flow Chart KM-1601SWH/3 and KM-1601SRH/3 E Cycle Steps Minute Fill Harvest CycleControl Board Control Board Layout Control BoardPart Number 2A1410-01 factory 2A1410-02 service Sequence Step LED Lights and Audible Alarm SafetiesNo. of Beeps Type of Alarm Every 3 sec Energized Time LEDs are On Components Min Max AvgSetting Pump-Out Cycle Comp, FMR, WV Seconds Pump-out timer S5 Dip Switch Do Not Adjust S5 Dip Switch No Model Controls and AdjustmentsS4 Dip Switch S4 Dip Switch Setting Time Seconds Time seconds InletPump-Out Frequency Control S4 dip switch 5 Freeze Timer S4 dip switch 9 S4 Dip Switch Setting Time MinutesControl Switch III. Technical Information Tank1601SWH/3 water-cooled Float Switch Vapor Service Valve Wiring Diagrams High-Pressure SwitchKM-1601SAH3 air-cooled Pressure-High* Switch Model KM-1601SWH water-cooled, KM-1601SRH remote air-cooledKM-1601SWH3 water-cooled, KM-1601SRH3 remote air-cooled Performance Data 2370 14561345 26102300 14921523 24102270 15551565 23902440 15831472 26402700 15641505 7852560 15311490 27101583 2580 15851511 29602490 15301498 2780IV. Service Diagnosis Diagnostic ProcedurePage Frequency Diagnosis Control Board Check Control Correct LED Model Board Lighting SequenceBin Control Check Float Switch Check and Cleaning Float Switch CheckFloat Switch Cleaning Adjustment of Water Regulating Valve water-cooled model Thermistor CheckNo Ice Production Possible Cause Diagnostic ChartsNo Ice Production Operating erratically Freeze Cycle Freeze UpFreeze Up Possible Cause Harvest Cycle Low Ice Production Possible Cause Long Harvest Cycle Low Ice ProductionFreeze Up Possible Cause Long Freeze CycleLow Ice Production Possible Cause Refrigerant Recovery Replacement of ComponentsService for Refrigerant Lines Brazing Evacuation and Recharge R-404APage Important Notes for Component Replacement ComponentVI. Cleaning and Maintenance Cleaning and Sanitizing InstructionsCleaning Procedure Sanitizing Procedure Following Cleaning Procedure Maintenance Preparing the Icemaker for Long StorageDrain the water tank

KM-1601SWH/3, KM-1601SRH/3, KM-1601SAH/3 specifications

Hoshizaki has long been a trusted name in the world of commercial refrigeration and ice-making equipment. Among its offerings, the KM-1601SAH/3, KM-1601SRH/3, and KM-1601SWH/3 models stand out for their innovative features and robust design. These machines are integral for businesses that require reliable and efficient ice production, such as restaurants, hotels, and convenience stores.

At the core of these models is Hoshizaki's renowned Crescent Cube Technology, which produces clear, crescent-shaped ice that is ideal for both beverage service and food presentation. The unique shape of the ice ensures reduced melting rates, helping to maintain beverage temperature for longer periods while minimizing dilution. Additionally, the crescent ice is less prone to clumping, making it easier to dispense and ideal for high-volume use.

One of the key features of the KM-1601 series is its exceptional ice production capacity. Each model can produce up to 1,600 pounds of ice in a 24-hour cycle, making them suitable for heavy-demand environments. The machines are constructed with a durable stainless steel exterior, providing not only a sleek look but also enhanced resistance to corrosion and easy maintenance.

The KM-1601SAH/3 is designed with a built-in ice storage bin, allowing for seamless integration into various setups. Its state-of-the-art refrigeration system ensures optimal energy efficiency, which is crucial for businesses looking to manage operational costs. The KM-1601SRH/3 includes a self-contained design, simplifying installation and reducing the need for external ice storage solutions.

For users concerned with hygiene, these models boast advanced sanitation features. Hoshizaki's Antimicrobial Agent is incorporated into key components to inhibit the growth of bacteria and slime, ensuring cleaner ice production. The machines also feature easy-to-access panels for quick cleaning and maintenance, reducing downtime.

Another significant characteristic is their user-friendly controls, which simplify operation and monitoring of ice production. The built-in monitoring system alerts users to any potential issues, allowing for proactive maintenance and minimal disruption to service.

The KM-1601SWH/3 model further enhances the lineup with its energy-efficient design, lightweight construction, and compact footprint, making it perfect for establishments with limited space. Collectively, these models reflect Hoshizaki's commitment to innovation, efficiency, and reliability in ice-making technology, making them a top choice for businesses that require substantial ice production without compromising on quality or safety. Whether you need a powerful ice machine for a bar, restaurant, or convenience store, Hoshizaki’s KM-1601 series delivers performance that you can depend on.
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