Normal Harvest Cycle - Hoshizaki KM-1900SAH Service Manual

5. Normal Harvest Cycle

LEDs 1, 4, and 2 are on. Comp and FMR remain energized. FMS de-energizes and
the HGV and WV open. As the evaporator warms, the thermistor reaches 48°F (9°C).
The control board then receives the thermistor's 3.9 kΩ signal and starts the harvest
timer. When the harvest timer completes its countdown, the harvest cycle is complete.
The minimum total time allowed by the control board for a complete harvest cycle is 2
minutes. WV is open during harvest for a maximum of 6 minutes or the length of harvest,
whichever is shorter. At the end of harvest, the control board checks the position of the
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 this sequence until the bin control senses ice and
shuts the unit down.
Legend: Comp–compressor; FMR–remote fan motors; FMS–self-contained fan motors;
F/S–float switch; HGV–hot gas valve; LLV–liquid line valve; PM–pump motor;
WV–inlet water valve
18