Hoshizaki KM-320MAH, MWH KM-515MAH, MRH/3, MWH(-M) Pump-Out Frequency Control S4 dip switch 5

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

NOTICE

Do not adjust on KM-515M_H without harvest pump timer. Adjustments to this setting on KM-515M_H without harvest pump timer may adversely affect performance and warranty coverage.

The pump-out frequency control is factory set to drain the water tank every 10 cycles on all KM-320M_H, KM-600MAH, KM-650M_H, KM-901M_H/3 and on KM-515MAH with harvest pump timer, and every cycle on KM-515M_H without harvest pump timer. 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. On "E" control boards, the first pump‑out is after the first freeze cycle. On "G" control boards, the first pump-out is dependent on S4 dip switch 5 & 6. See the table below.

	"E" & "G" Control Board			1st Pump-Out
S4 Dip Switch Setting			Pump-Out	"E" Control Board	"G" Control Board
No. 5		No. 6	Frequency
OFF		OFF	Every cycle	After 1st freeze cycle	After 2nd 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

5.Bin Control Selector or Harvest Pump Timer Operation (S4 dip switch 7) Depending on the control board, S4 dip switch 7 is used for either bin control selection or harvest pump timer operation.

(1) Bin Control Selector, "E" Control Board

NOTICE

Do not adjust. This dip switch must be left in the factory default position or the icemaker will not operate correctly.

When set to on position on an icemaker with a thermostatic bin control, a 5-beep alarm sounds (open circuit) and the icemaker does not operate.

	"E" Control Board
S4 Dip Switch Setting	Bin Control
No. 7
ON	Mechanical (requires resistor wire harness)
OFF	Thermostatic

48