Hoshizaki KMD-201AWA Service Manual page 20

Do not adjust the S2 dip switch. These must be left in the factory default position, or the unit
will not operate properly.
b) Harvest Timer (S1 dip switch 1 & 2)
Used for adjustment of the harvest timer. The harvest timer starts counting when the
thermistor reads a certain temperature at the evaporator outlet.
Dip Switch Setting
No. 1 No. 2
OFF OFF
ON OFF
OFF ON
ON ON
c) Drain Timer (S1 dip switch 3 & 4)
Once every ten freeze cycles, the drain valve opens to drain the water tank for the time
determined by the drain timer. These switches also determine the time to delay completion
of a harvest cycle, i.e. the minimum harvest time.
Do not change this setting, or the unit will not operate properly or produce high quality ice.
Dip Switch Setting
No. 3 No. 4
OFF OFF
ON OFF
OFF ON
ON ON
T1: Time to drain the water tank
T2: Harvest timer at drain
Drain cycle always occurs on the 2nd harvest after startup. Then, depending on the drain
frequency control setting (dip switch 5 & 6), drain cycle occurs every cycle, or every 2nd, 5th,
or 10th cycle.
d) Drain Frequency Control (S1 dip switch 5 & 6)
The water tank drains at the frequency set by the drain frequency control.
The drain frequency control is factory-adjusted to drain the water tank every 10 cycles, and
no adjustment is required. However, where water quality is bad and the icemaker needs a
drain more often, the drain frequency can be adjusted as shown in the table below.
Dip Switch Setting
No. 5 No. 6
OFF OFF
ON OFF
OFF ON
ON ON
Time (seconds)
60
90
120
180
Time (seconds)
T1 T2
10 120
10 180
20 120
20 180
Frequency
Every cycle
Every 2 cycles
Every 5 cycles
Every 10 cycles
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