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2. Harvest Timer (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. Before changing this setting, contact Hoshizaki
Technical Support at 1-800-233-1940 for recommendations. Keep in mind that setting the
harvest timer to a longer setting decreases 24-hour production.
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
OFF OFF 60
ON OFF 90
OFF ON 120
ON ON 180
3. Pump-Out Timer (S4 dip switch 3 & 4)
NOTICE
• On KM-515M_H models without harvest pump timer operation, never
adjust the pump-out timer's harvest timer (T2) for a time less than
150 sec. Otherwise, the icemaker will not perform properly.
• On models with harvest pump timer, do not adjust 3 off and 4 on. Pump
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 ows through the small tube to power ush the oat
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 sec.
S4 Dip Switch Setting Time (sec.)
Inlet Water
ValveNo. 3 No. 4
T1
T2
OFF OFF 10 150 Closed
ON OFF 10 180 Closed
OFF ON 10 120 Open
ON ON 20 180 Closed
T1: Time to drain the water tank
T2: Harvest timer at pump out