C) Pump-Out Timer (S4 Dip Switch 3 & 4); D) Pump-Out Frequency Control (S4 Dip Switch 5 & 6); E) S4 Dip Switch 7 & 8 - Hoshizaki KMD-850MAH Service Manual

c) Pump-Out Timer (S4 dip switch 3 & 4)
Do not adjust. Leave in the factory default position; otherwise, the drain valve
and water valve will not operate at pump out.
When a freeze cycle is completed and a pump out is called for, the pump motor stops
for 2 seconds. The pump motor then restarts and the drain valve and water valve open.
Water is taken from the sump and pumped through the drain valve and down the drain
for 10 seconds. The pump-out timer also acts in place of the harvest timer during cycles
with a pump out.
The pump-out timer is factory-adjusted. Leave in the factory default position; otherwise,
the drain valve and inlet water valve will not operate at pump out.
T1: Time to drain the water tank
T2: Harvest timer at pump out
Depending on the pump-out frequency control setting (dip switch 5 & 6), pump out
occurs every cycle, or every 2nd, 5th, or 10th cycle.
d) Pump-Out Frequency Control (S4 dip switch 5 & 6)
The pump motor drains the water tank at the frequency set by the pump-out frequency
control.
The pump-out frequency control is factory-adjusted to drain the water tank every
10 cycles, and no adjustment is generally required. With dip switches 5 and 6 in the
factory default position, the 1st pump out occurs after the 11th freeze cycle and every
10th cycle thereafter. However, where water quality is bad and the icemaker needs a
pump out more often, the pump-out frequency can be adjusted as shown in the table
below.
CAUTION
Dip Switch Setting
No. 3 No. 4
OFF OFF
ON OFF
OFF ON
ON ON
Dip Switch Setting
No. 5 No. 6
OFF OFF
ON OFF
OFF ON
ON ON
Inlet
Time (seconds)
Water
T1 T2
Valve
10 150 closed
10 180 closed
10 120 open
20 180 closed
Frequency
every cycle
every 2 cycles
every 5 cycles
every 10 cycles
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