Service Manual

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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 models with harvest pump timer, do not adjust 3 off and 4 on. Drain valve does
not energize in this setting.
The pump motor stops for 2 seconds, then the X12 relay energizes, allowing the pump
motor and drain valve to 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. The pump-out timer control can be set to pump-out for 10 or 20 seconds.
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