4)Initial Harvest Cycle – LEDs 1, 4, and 2 are on. WV and X11 relay (KM-1601SAH/3) remain energized, Comp, FM/FMR, HGV, and X10 relay (KM-1601SAH/3) energize.

CB monitors the warming of the evaporator via the thermistor located on the suction line. When the thermistor reaches 48°F (9°C), CB reads a 3.9 kΩ signal from the thermistor and turns harvest termination over to the harvest timer (S4 dip switch 1 & 2). The harvest timer has settings of 60, 90, 120, and 180 seconds.

KM-1601SAH/3 "G" CB: WV is energized during harvest for a maximum of 6 minutes or the length of harvest minus 50 seconds, whichever is shorter.

50 seconds before the harvest timer terminates, LED 4 turns off, WV and X-11 relay de‑energize, LED 3 turns on and PM energizes for the last 50 seconds of harvest.

CAUTION! S4 dip switch 7 must remain in the factory default position of

7 on. Otherwise, PM will not energize during the last 50 seconds of harvest. Adjustment outside of the factory default position may result in damage to the icemaker. PM is energized through CB K1 ten-pin connector pin #5 (DBU wire) and the X10 relay.

KM-1601SWH/3,KM-1601SRH/3 "E" CB: WV is energized during harvest for a maximum of 6 minutes or the length of harvest, whichever is shorter.

When the harvest timer terminates, the harvest cycle is complete. CB checks the position of F/S and proceeds to the next cycle if it is closed, or calls for a 1-minute fill cycle if it is open. The minimum total time allowed by CB for a complete harvest cycle is 2 minutes.

Diagnosis: Check that Comp, FM/FMR, HGV, and WV are energized. Average initial harvest cycle at factory setting is 2 to 3 minutes. 1.5 minutes after initial harvest begins, touch Comp discharge line. Is it hot? If not, check that Comp is energized, refrigerant pressures are in range, HGV is energized and open, LLV is de-energized and closed. If discharge line is hot, touch the inlet line to the evaporator. If discharge line is hot, place a thermometer on the suction line next to the thermistor. Has it warmed to 48°F (9°C) or warmer? Confirm thermistor status. See "IV.E. Thermistor Check."

KM-1601SAH/3 "G" CB: If temperature has been reached, check that WV and X-11 relay de‑energize (LED 4 off) and PM energizes (LED 3 on) to circulate water over evaporator for the last 50 seconds of harvest. If not, make sure S4 dip switch 7 is in the factory default position. Check CB K1 ten-pin connector pin #5 (DBU wire) for 115VAC. Also check X10 relay. X10 relay and X10 relay terminal #4 must be energized for PM to rotate in the proper direction.

All: If 1-minute fill cycle starts after the harvest timer terminates, see "IV.D. Float Switch Check and Cleaning." If the thermistor reading is in proper range and CB fails to terminate the harvest cycle and initiate the freeze cycle, CB is bad and must be replaced.

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