Harvest Timer (S4 Dip Switch 1 & 2); Pump-Out Timer (S4 Dip Switch 3 & 4) - Hoshizaki KMS-1122MLH Service Manual

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 harvest needs to be prolonged
for extra cleaning. Before changing this setting, contact your local Hoshizaki distributor or
Hoshizaki Technical Support for recommendations. Keep in mind that setting the harvest
timer to a longer setting decreases 24-hr production. 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)" below.
3. Pump-Out Timer (S4 dip switch 3 & 4)
Factory set for proper operation. Do not adjust S4 dip switch 3 & 4 to 3 off and 4 on.
Otherwise, drain valve does not energize in pump out.
The 1st pump-out occurs after the 11th freeze cycle, then every 10th cycle thereafter.
When a pump-out is called for, the pump motor stops for 2 sec. then the X12 drain valve
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 can be set for a 10 or
20 sec. pump out.
S4 Dip Switch Setting
No. 3
OFF
ON
OFF
ON
T1: Time to drain the water tank
T2: Harvest timer at pump-out
Dip Switch Setting
No. 1
No. 2
OFF
ON
OFF
ON
Time (sec.)
T1
No. 4 T2
OFF 10 150
OFF 10 180
ON 10 120
ON 20 180
Time (sec.)
OFF 60
OFF 90
ON 120
ON 180
NOTICE
Inlet Water Valve
closed
closed
open if refill = 0; closed if refill 1 or greater
closed
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