Hoshizaki KM-1601SWH/3, KM-1601SAH/3, KM-1601SRH/3 service manual Float Switch Check and Cleaning

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D. Float Switch Check and Cleaning

F/S is used to determine that there is sufficient water in the water tank after the 1‑minute fill cycle and after each harvest cycle. F/S is also used to determine that the appropriate volume of water has been converted into ice before switching out of the freeze cycle. No adjustment is required.

1. Float Switch Check

To check F/S, 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 insulation panel, then remove the drain plug located on the lower front part of the ice chute. See Fig. 1. Allow the water tank to drain.

4)Replace the drain plug in its correct position. Be careful not to cross thread it.

5)Remove the control box cover.

6)Disconnect the black F/S connector from CB BLACK K5 connector.

Ice Chute

Float Switch Assembly

Drain Plug

Fig. 1

7)Check for continuity across F/S leads. With the water tank empty, F/S should be open. If open, continue to step 8. If closed, follow the steps in "IV.D.2. Float Switch Cleaning." After cleaning F/S, check it again. Replace if necessary.

8)Reconnect the black F/S connector to CB BLACK K5 connector, then replace the control box cover in its correct position.

9)Move the control switch to the "ICE" position. Replace the insulation panel and the front panel in their correct positions, then turn on the power supply. After 1 minute, the 1-minute fill cycle should end and the initial harvest cycle should begin. If the initial harvest cycle begins, F/S is good and the check is complete. If the initial harvest cycle does not begin, continue to step 10.

10)Turn off the power supply.

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

12)Remove the control box cover.

13)Disconnect the black F/S connector from CB BLACK K5 connector.

14)Check for continuity across F/S leads. With the water tank full, F/S should be closed. If F/S is closed and the icemaker will not switch from the 1-minute fill cycle to the initial harvest cycle, replace CB.

If open, confirm that the water tank is full. If the water tank is not full, check the water supply, water filters, and WV. If the water tank is full, follow the steps in "IV.D.2. Float Switch Cleaning." After cleaning F/S, check it again. Replace if necessary.

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Contents Superior Degree Reliability Number Issued Revised Hoshizaki AMERICA, INC Contents Page Important Safety Information Serious injuryIndicates important information about the use and care 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 LED Lights and Audible Alarm Safeties No. of Beeps Type of Alarm Every 3 secSequence Step Energized Time LEDs are On Components Min Max AvgSetting Pump-Out Cycle Comp, FMR, WV Seconds Pump-out timer Controls and Adjustments S4 Dip SwitchS5 Dip Switch Do Not Adjust S5 Dip Switch No Model 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 1456 13452370 26101492 15232300 24101555 15652270 23901583 14722440 26401564 15052700 7851531 14902560 27101583 1585 15112580 29601530 14982490 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 CheckDiagnostic Charts No Ice ProductionNo Ice Production Possible Cause Operating erratically Freeze Up Freeze Up Possible Cause Harvest CycleFreeze Cycle Low Ice Production Freeze Up Possible CauseLow Ice Production Possible Cause Long Harvest Cycle Long Freeze CycleLow Ice Production Possible Cause Replacement of Components Service for Refrigerant LinesRefrigerant Recovery 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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