C) Pump-Out Timer (S4 Dip Switch 3 & 4); D) Pump-Out Frequency Control (S4 Dip Switch 5 & 6) - Hoshizaki KM-1301SAH/3 Service Manual

c) Pump-Out Timer (S4 dip switch 3 & 4)
Do not adjust S4 dip switch 3 off and S4 dip switch 4 on for this model.
Otherwise, pump motor does not rotate in the pump-out direction.
When a pump-out is called for, the pump motor stops after the preceding freeze cycle.
The pump motor restarts 2 seconds later in the reverse direction, 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 the float switch. The pump motor drains the water tank
for the time determined by the pump-out timer. The pump-out timer also acts in place
of the harvest timer during cycles with a pump-out. The pump-out timer is factory set,
and generally no adjustment is required. However, where water quality is bad and the
icemaker needs a longer pump-out time, the pump-out timer can be adjusted. The
pump-out timer control can be set to pump-out for 10 or 20 seconds.
T1: Time to drain the water tank
T2: Harvest timer at pump-out
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,
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 S4 dip switch 5 & 6 settings. The first
pump-out is factory set to occur after the 11th freeze cycle. See the table below.
S4 Dip Switch Setting
CAUTION
S4 Dip Switch Setting Time (seconds)
No. 3 No. 4
OFF OFF
ON OFF
OFF ON
ON ON
No. 5 No. 6
OFF OFF
ON OFF
OFF ON
ON ON Every 10 cycles
T1
T2
10 150
10 180
10 120
20 180
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
26
Inlet
Water
Valve
closed
closed
open
closed