Service Manual

40
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)
When a pump-out is called for, the pump motor stops for 2 sec. After 2 sec. the drain
valve and pump motor energize. On KM-350M_J models the inlet water valve also
energizes. 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 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