Harvest Time (S4 Dip Switch 1 & 2); Pump-Out Time/Harvest Time During Pump-Out (S4 Dip Switch 3 & 4) - Hoshizaki KM-1301SAJ-E Service Manual

2. Harvest Time (S4 dip switch 1 & 2)
The harvest timer starts counting when the thermistor reaches 48°F (9°C) at the
evaporator outlet and the control board reads 3.9 kΩ from the thermistor. The harvest
timer is factory set, and generally no adjustment is required. However, a setting longer
than the factory setting may be advised in cases where the drain provided at harvest
needs to be prolonged for extra cleaning. Note that the pump-out timer (S4 dip switch
3 & 4) acts in place of the harvest timer during cycles with a pump out. For details, see
"III.C.3. Pump-Out Timer (S4 dip switch 3 & 4)."
Note: On models with a pump-out every cycle, the harvest timer is only relevant during
the initial harvest cycle since a pump out occurs every cycle thereafter.
3. Pump-Out Time/Harvest Time During Pump-Out (S4 dip switch 3 & 4)
Do not adjust 3 off and 4 on. Pump motor does not run in pump-out rotation in this
setting.
When a pump-out is called for, the pump motor stops for 2 sec., then energizes in the
reverse direction, taking water from the bottom of the water 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 time can be set to pump-out for 10 or 20 sec. During
pump-out cycles minimum harvest time is based on times given in the table below.
S4 Dip Switch Setting
No. 3
OFF
ON
OFF
ON
T1: Time to drain the water tank
T2: Harvest timer at pump out
S4 Dip Switch Setting
No. 1 No. 2
OFF OFF
ON OFF
OFF ON
ON ON
Time (sec.)
T1
No. 4 S5-4 OFF S5-4 ON
OFF 10
OFF 10
ON 10
ON 20
Time
(sec.)
S5-4 OFF S5-4 ON
60 30
90 45
120 60
180 75
NOTICE
T2
S5-4 OFF
150 100
180 130
120 70
180 180
33
Inlet Water
Valve
S5-4 ON
Closed Closed
Closed Closed
Open Closed
Closed Closed