Harvest Time (S4 Dip Switch 1 & 2); Pump-Out Time/Harvest Time During Pump-Out (S4 Dip Switch 3 & 4) - Hoshizaki KM-660MAJ-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)
When a pump-out is called for, the pump motor stops for 2 sec. After 2 sec. the drain
valve and pump motor energize. Water is removed from the bottom of the water tank
and sent down the drain. The pump-out 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 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
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