Pump-Out Frequency Control (S4 Dip Switch 5 & 6); Bin Control Selector Or Harvest Pump Timer Operation (S4 Dip Switch 7) - Hoshizaki KM-320MAH Service Manual

4. Pump-Out Frequency Control (S4 dip switch 5 & 6)
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
S4 Dip Switch Setting
No. 5 No. 6
OFF OFF
ON OFF
OFF ON
ON ON

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
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.
Pump-Out
Frequency
Every cycle
Every 2 cycles
Every 5 cycles
Every 10 cycles
S4 Dip Switch Setting
No. 7
ON
OFF
NOTICE
1st Pump-Out
"E" Control Board
After 1st freeze cycle
NOTICE
"E" Control Board
Bin Control
Mechanical (requires resistor wire harness)
Thermostatic
48
"G" Control Board
After 2nd freeze cycle
After 3rd freeze cycle
After 6th freeze cycle
After 11th freeze cycle