Hoshizaki KM-201BWH, KM-260BAH, KM-201BAH, KM-260BWH service manual Normal Harvest Cycle, Shutdown

the control board setting, pump-out 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 48°F (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.

[f] SHUTDOWN

When BC is activated (BC open), the “POWER OK” LED flashes. There is a delay before the shutdown sequence begins. The delay varies depending on the cycle the icemaker is in at the time of activation. For details, see the table below.

Cycle at Bin Control Activation Delay Before Shutdown Sequence Begins

Fill Cycle	15 seconds
Harvest Cycle	15 seconds after the next freeze cycle starts
Freeze Cycle	15 seconds if BC is activated between the beginning of
	freeze and termination of the 5-minute short cycle protection
	timer (timer starts when the thermistor temperature drops to
	36°F (2°C) (5.5 kΩ or more)). After this time, the unit will not
	shut down until the next harvest cycle is complete.

After the delay, all components de-energize. DV energizes after 2 seconds. PM energizes after 2 seconds. PM takes water from the tank and forces it through DV and down the drain. The water tank drains for a maximum of 5 minutes or until F/S opens. DV and PM (if applicable) then de-energize. When BC closes again calling for ice, the unit starts at the 1-minute fill cycle. There is a 90-second minimum off time before the icemaker can restart.

Legend: BC–bin control; 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

10