Hoshizaki KM-1301SWH-E, KM-1301SRH-E Harvest Pump Timer S4 dip switch, Factory Use S4 dip switch

e) Harvest Pump Timer (S4 dip switch 7)

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 X1 relay (auxiliary code T‑0, U-0), X10 relay (auxiliary code U‑1 and later). 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."

S4 Dip Switch Setting	Pump Motor
No. 7	Time (seconds)
ON	50
OFF	0

f) Factory Use (S4 dip switch 8)

Factory set for proper operation. Do not adjust. This must be left in the factory default position.

g) Freeze Timer (S4 dip switch 9 & 10)

CAUTION

Adjust to proper specification, or the unit may not operate correctly.

The freeze timer setting determines the maximum allowed freeze time to prevent possible freeze-up issues. Upon termination of the freeze timer, the control board initiates the harvest cycle. After 2 consecutive freeze timer terminations, the control board shuts down the icemaker. In this case, see "IV.G.3. Low Ice Production" for possible solutions. The freeze timer is factory set, and generally no adjustment is required. Before changing this setting, contact Hoshizaki Technical Support at 1‑800‑233-1940 for recommendations.

S4 Dip Switch Setting		Time
		(minutes)
No. 9	No. 10
OFF	OFF	60
OFF	ON	50
ON	OFF	70
ON	ON	60

23