43
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.
S4 Dip Switch Setting
Time
(sec.)
No. 1
No. 2
S5-4 OFF
S5-4 ON
OFF
OFF
60
30
ON
OFF
90
45
OFF
ON
120
60
ON
ON
180
75
3. Pump-Out Time/Harvest Time During Pump-Out (S4 dip switch 3 & 4)
NOTICE
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
Time (sec.)
Inlet Water
Valve
No. 3
No. 4
T1
T2
S5-4 OFF S5-4 ON
S5-4 OFF
S5-4 ON
OFF
OFF
10
150
100
Closed
Closed
ON
OFF
10
180
130
Closed
Closed
OFF
ON
10
120
70
Open
Closed
ON
ON
20
180
180
Closed
Closed
T1: Time to drain the water tank
T2: Harvest timer at pump out
