Hoshizaki KM-1601SRH/3, KM-1601SWH/3, KM-1601SAH/3 service manual Frequency

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5)Freeze Cycle – LED 1 is on. Comp and FM/FMR remain energized, PM energizes or, for KM-1601SAH/3, remains energized. LLV energizes. HGV and X10 relay (KM‑1601SAH/3) de‑energize. The unit is held in freeze by a 5-minute short cycle protection timer (CB will not accept a signal from F/S during the first 5 minutes of freeze). After the 5-minute short cycle protection timer terminates, CB turns freeze termination over to F/S. Diagnosis: Check that Comp, FM/FMR, PM, and LLV are energized. Confirm that the evaporator temperature drops. If not, confirm that LLV has energized and is open. Make sure WV and HGV are de‑energized and closed. Next, confirm proper unit pressures and TXV operation, check for an inefficient Comp or an inoperative HM. After 5 minutes in freeze, disconnect black F/S connector from CB BLACK K5 connector. After a 15 second delay, the unit should switch out of freeze. If the unit switches out of freeze with F/S connector removed, but would previously not switch out of freeze with F/S connected (long freeze - 3 beep alarm), F/S may be sticking. To check and clean F/S, see "IV.D. Float Switch Check and Cleaning." If the unit remains in freeze longer than 15 seconds after disconnecting black F/S connector, replace CB. For short freeze cycle, check that reservoir is full at beginning of freeze, pump-out check valve is not leaking by, and drain plug is in and not leaking.

Note: Normal freeze cycle will last 20 to 40 minutes depending on model and conditions. Cycle times and pressures should follow performance data provided in this manual. See "III.C. Performance Data."

6)Pump-Out Cycle – (10/20 second pump-out) – LEDs 1, 3, and 2 are on. LED 4 is

on when S4 dip switch 3 & 4 are set to 3 off and 4 on. CAUTION! for KM-1601SAH/3:

Do not adjust S4 dip switch 3 & 4 to 3 off and 4 on. Adjustment to this position on this model prevents the pump motor from rotating in the pump-out direction.

Comp and FM/FMR remain energized, HGV energizes. WV energizes if S4 dip switch 3 off and 4 on. LLV de‑energizes. PM de-energizes for 2 seconds, then reverses for 10/20 seconds depending on pump‑out timer S4 dip switch 3 & 4 setting. When the pump‑out timer terminates, the pump-out is complete. The pump-out frequency control is factory set for every 10th cycle (except for KM-1601SRH/3 utilizing 3U0111-02 water valve), and generally no adjustment is required. However, where water quality is bad and the icemaker needs a pump-out more often, the pump-out frequency can be adjusted.

The pump-out frequency control (S4 dip switch 5 & 6) can be set to have a pump-out occur every cycle, or every 2, 5, or 10 cycles. Timing of the first pump-out is dependent on the control board. For KM-1601SAH/3 "G" CB, first pump-out is dependent on S4 dip switch 5 & 6. See the table below. For KM-1601SWH/3 and KM-1601SRH/3 "E" CB, first pump‑out occurs after the first freeze cycle.

KM-1601 SAH/3 "G" & KM-1601SWH/3 & KM-1610SRH/3 "E" Control Board Settings

 

 

 

1st Pump-Out

 

 

 

 

 

S4 Dip Switch Setting

 

 

KM-1601SWH/3

 

 

Pump-Out

KM-1601SAH/3

KM-1601SRH/3

 

 

No. 5

No. 6

Frequency

"G" Control Board

"E" Control Board

 

 

 

 

 

OFF

OFF

Every cycle

After 2nd freeze cycle

After 1st freeze cycle

ON

OFF

Every 2 cycles

After 3rd freeze cycle

 

 

 

 

 

 

OFF

ON

Every 5 cycles

After 6th freeze cycle

 

 

 

 

 

 

ON

ON

Every 10 cycles

After 11th freeze cycle

 

 

 

 

 

 

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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 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 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 CheckNo Ice Production Possible Cause Diagnostic ChartsNo Ice Production Operating erratically Freeze Cycle Freeze UpFreeze Up Possible Cause Harvest Cycle Low Ice Production Freeze Up Possible CauseLow Ice Production Possible Cause Long Harvest Cycle 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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