Pump-Out Frequency Control S4 dip switch 5

d)Pump-Out Frequency Control (S4 dip switch 5 & 6)

The pump-out frequency control is factory set to drain the water tank every 10 cycles (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 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" control board), first pump-out is dependent on S4 dip switch 5 & 6. See the table below. For KM-1601SWH/3 and KM-1601SRH/3 ("E" control board), first pump‑out is after the first freeze cycle.

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

			1st Pump-Out
S4 Dip Switch Setting				KM-1601SWH/3
		Pump-Out	KM-1601SAH/3	KM-1601SRH/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

e)Harvest Pump Timer/Bin Control Selector (S4 dip switch 7)

Depending on the control board, S4 dip switch 7 is either a harvest pump timer or bin control selector.

(1) Harvest Pump Timer, KM-1601SAH/3 "G" Control Board

CAUTION

Factory set for proper operation. Do not adjust. Adjustment outside of the factory default setting may result in damage to the icemaker.

Depending on the harvest pump timer setting, the pump motor energizes and runs the last 0 or 50 seconds of harvest. When the pump is on, water circulates over the evaporator. The water valve is open during harvest for a maximum of 6 minutes or the length of harvest minus 0 or 50 seconds (determined by the harvest pump timer setting), whichever is shorter.

When S4 dip switch 7 is on, the pump motor is energized through the #5 pin (DBU wire) on the control board K1 ten‑pin connector and the X10 relay. The #5 pin (DBU wire)

is used in most applications to reverse the pump motor or energize the drain valve in pump‑out cycles. In this application, it is used for the pump-out cycle (reverse rotation) as well as the harvest pump timer (freeze rotation). Therefore, the harvest pump timer relays are needed to control the pump motor direction during the pump-out and harvest cycles. See "III.B. Wiring Diagrams."

KM-1601SAH/3

"G" Control Board

S4 Dip Switch Setting	Pump Motor
No. 7	Time (seconds)
ON	50

OFF	0

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.