D) Pump-Out Cycle; E) Harvest Cycle; F) Shutdown - Hoshizaki KM-1301SAH/3 Service Manual

de-energize. For the first 5 minutes, CB will not accept a signal from F/S. This minimum
5-minute freeze time is short cycle protection for Comp. At the end of 5 minutes, F/S
assumes control. As ice builds on the evaporator, the water level in the tank lowers. The
freeze cycle continues until F/S opens and terminates the cycle. There is a 15 second
delay before CB acknowledges an open F/S.

d) Pump-Out Cycle

LEDs 1, 3, and 2 are on. LED 4 is on when S4 dip switch 3 & 4 are set to 3 off and 4 on.
CAUTION! Do not adjust S4 dip switch 3 & 4 to 3 off and 4 on. Adjustment to this
position on this model prevents the unit from operating correctly and may cause
damage. For details, see "II.C.3.c) Pump-Out Timer (S4 dip switch 3 & 4)." Comp and
FMR remain energized, HGV energizes, WV energizes if S4 dip switch 3 off and 4 on.
LLV and FM de-energize. PM stops for 2 seconds then reverses, taking water from the
bottom of the tank and forcing pressure against the check valve seat allowing water to
go through the check valve and down the drain. At the same time, water flows through
the small tube to power flush F/S. When the pump-out timer expires, the pump-out is
complete.
The first pump-out occurs after the 11th freeze cycle, then every 10th cycle thereafter.
The pump-out frequency control is factory set, 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 (S4 dip switch 5 &
6) 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 S4 dip switch 5 & 6 settings. See the table below. For
details, see "II.C.3.d) Pump-Out Frequency Control (S4 dip switch 5 & 6)."
S4 Dip Switch Setting

e) Harvest Cycle

Same as the initial harvest cycle. See "II.B.1.b) Initial Harvest Cycle."
Note: Unit continues to cycle until BC is satisfied or power is turned off. The unit always
restarts at the 1-minute fill cycle.

f) Shutdown

When ice contacts the thermostatic bulb (BC switch open), BC shuts down the unit within
10 seconds. The bin control is factory set, and generally no adjustment is required.
However, adjustment may be needed in some conditions, particularly at higher altitude
locations.
Legend: BC–bin control; CB–control board; Comp–compressor; FMR–fan motor-remote;
FM–fan motor; F/S–float switch; HGV–hot gas valve; LLV–liquid line valve;
PM–pump motor; WV–inlet water valve
No. 5 No. 6
OFF OFF
ON OFF
OFF ON
ON ON Every 10 cycles
Pump-Out
1st Pump-Out
Frequency
Every cycle After 2nd freeze cycle
Every 2 cycles After 3rd freeze cycle
Every 5 cycles After 6th freeze cycle
After 11th freeze cycle
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