Controls And Adjustments; A) Default Dip Switch Settings; B) Harvest Timer (S4 Dip Switch 1 & 2) - Hoshizaki KM-901MAH Service Manual

3. Controls and Adjustments

Dip switches are factory set. Failure to maintain factory settings may adversely
affect performance and warranty coverage. For more information, contact
Hoshizaki Technical Support at 1-800-233-1940.

a) Default Dip Switch Settings

The dip switches are factory set to the following positions:
S4 Dip Switch No.
KM-901MAH
KM-901MWH
KM-901MRH/3
("G" Control Board: Auxiliary Code U-1 and Later)
S5 Dip Switch No.
KM-901MAH
KM-901MWH
KM-901MRH/3
b) Harvest Timer (S4 dip switch 1 & 2)
The harvest timer when the thermistor reads 48°F (9°C) at the evaporator outlet and the
control board reads the thermistor's 3.9 kΩ signal. 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 flush 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 (S1 dip switch 3 & 4) acts in place of the harvest timer
during cycles with a pump-out. For details, see "II.C.3.c) Pump-Out Timer (S1 dip
switch 3 & 4)."
S4 Dip Switch
1 2 3 4
ON OFF ON OFF ON
ON OFF ON OFF ON
ON OFF ON OFF ON
S5 Dip Switch
1 2 3
OFF OFF OFF OFF OFF
OFF OFF OFF OFF OFF
OFF OFF OFF OFF OFF
S4 Dip Switch Setting
No. 1
OFF
ON
OFF
ON
CAUTION
5 6 7 8
ON OFF OFF OFF ON
ON OFF OFF OFF ON
ON OFF OFF OFF ON
4 5
Freeze Timer (9 & 10)
Factory Use (8)
Bin Control Selector (7) "E" Control Board
Harvest Pump Timer (7) "G" Control Board
(Do Not Adjust)
Pump-Out Frequency Control (5 & 6)
Pump-Out Timer (3 & 4)
Harvest Timer (1 & 2)
Time
(seconds)
No. 2
OFF 60
OFF 90
ON 120
ON 180
32
9 10