[D] Drain Cycle; [E] Normal Harvest Cycle - Hoshizaki KM-100A Service Manual

[d] DRAIN CYCLE

LEDs 4, 5, 6, and 7 are on. Comp continues to run, HGV opens, and FMS de-energizes.
PM stops for 2 seconds, DV energizes, then restarts to take water from the sump and
force it through DV and down the drain. When the drain timer stops counting, the drain
is complete. The drain timer has settings of 10 and 20 seconds (S1 dip switch 3 & 4).
Drain cycle always occurs on the 2nd harvest after startup. Then, depending on the
control board setting, drain cycle occurs every cycle, or every 2nd, 5th, or 10th cycle (S1
dip switch 5 & 6).

[e] NORMAL HARVEST CYCLE

LEDs 5, 6, and 8 are on. Comp continues to run, HGV remains open and WV opens. As
the evaporator warms, the thermistor reaches 9°C. The control board then receives the
thermistor's 3.9 kΩ signal and starts the harvest timer. WV is open during harvest for a
maximum of 6 minutes or the length of harvest minus 0, 10, 30, or 50 seconds (adjustable
by S1 dip switch 7 & 8), whichever is shorter. LED 8 goes off when WV closes. PM
energizes and runs for the last 0, 10, 30, or 50 seconds of harvest depending on S1 dip
switch 7 & 8 setting. LED 7 comes on when PM energizes. At the end of harvest, the
control board checks the position of F/S and proceeds to the freeze cycle if it is closed
or calls for a 1-minute fill if it is open.
The unit continues to cycle through [c], [d], and [e] sequence until the bin control is
activated and shuts the unit down. When the bin control is activated, the "POWER OK"
LED flashes.
Legend: Comp–compressor; DV–drain valve; FMS–self-contained fan motor; F/S–float
switch; HGV–hot gas valve; PM–pump motor; WV–inlet water valve
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