Hoshizaki KM-1601SAH/3 Control Board Check, Control Correct LED Model Board Lighting Sequence

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B. Control Board Check

Before replacing CB that does not show a visible defect and that you suspect is bad, always conduct the following check procedure. This procedure will help you verify your diagnosis. Always choose a white neutral wire to establish a good neutral connection when checking voltages.

Alarm Reset: If CB is in alarm (beeping), press the "ALARM RESET" button on CB while it is beeping. WARNING! Risk of electric shock. Care should be taken not to touch live terminals. Once reset, the unit starts at the 1-minute fill cycle. For audible alarm information, see "II.C.2. LED Lights and Audible Alarm Safeties."

1) Check the dip switch settings to assure that S4 dip switch 3, 4, 7, 8, 9, 10 and

S5 (KM‑1601SAH/3 "G" CB) dip switch 1 through 5 are in the factory default position. S4 dip switch 1, 2, 5, 6 are cleaning adjustments and the settings are flexible. For factory default settings, see "II.C.3.a) Default Dip Switch Settings."

2)Move the control switch to the "ICE" position. If CB red "POWER OK" LED is on, the control voltage is good. If CB red "POWER OK" LED is off, clear ice away from TBC bulb in the storage bin area. If no ice is near TBC bulb or CB red "POWER OK" LED does not turn on even after clearing away ice, check TBC. See "IV.C. Bin Control Check." If TBC is okay (closed) and CB red "POWER OK" LED is off, check the fuse, control switch contacts, HPS, and CT secondary circuit. CT output is 10.5V at 115V primary input. If the secondary circuit has proper voltage and CB red "POWER OK" LED is off, CB is bad and should be replaced.

If CT secondary circuit does not have proper voltage, check the CT primary circuit. Check for 115V at CB K1 ten-pin connector. Check the #10 pin (BR wire) to a white neutral wire for 115V. For additional checks, see "IV.G.1. No Ice Production."

3) The "OUTPUT TEST" button provides a relay sequence test. Make sure the control

switch is in the "ICE" position, then press the "OUTPUT TEST" button. For the correct lighting sequence, see the table below. Note that the order of the LEDs from the outer edge of CB is 1, 4, 3, 2. Components (e.g., compressor) will cycle during the test.

 

Control

Correct LED

Model

Board

Lighting Sequence

KM-1601SAH/3

"G"

1, 4, 3, 2

 

 

 

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

"E"

2, 3, 4, 1

 

 

 

Following the test, the icemaker resumes operation. If the LEDs do not turn on as described above, CB is bad and should be replaced.

4) To verify voltage output from CB to the components, slide CB K1 ten‑pin connector out far enough to allow multimeter lead contact. With the unit in the cycle to be tested, check output voltage from the corresponding pin on CB K1 ten‑pin connector to ground. If output voltage is not present and the appropriate LED is on, CB is bad and must be replaced.

Legend: CB–control board; CT–control transformer; HPS–high-pressure switch; TBC–thermostatic bin control

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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 S4 Dip Switch Controls and AdjustmentsS5 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 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 Diagnostic ChartsNo Ice Production Possible Cause Operating erratically Freeze Up Possible Cause Harvest Cycle Freeze UpFreeze Cycle Low Ice Production Possible Cause Long Harvest Cycle Low Ice ProductionFreeze Up Possible Cause Long Freeze CycleLow Ice Production Possible Cause Service for Refrigerant Lines Replacement of ComponentsRefrigerant 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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