Hoshizaki KM-40C-HC Service Manual page 11

1. Power On
When power is supplied, a 5 second delay occurs at startup. Then, the display shows
"run".
2. Fill Cycle
WV opens, PM energizes and the fill period begins. Every minute, the board checks for
a closed F/S. If F/S is closed, PM de-energizes and the harvest cycle starts.
In the sanitation mode (Setting 53), the fill cycle is followed by the "Sanitation Control".
3. Harvest Cycle
WV remains open, Comp energizes, HGV opens, and harvest begins. At the same time,
the minimum harvest cycle timer (2 minutes) starts counting down. When the evaporator
outlet temperature reaches 9°C, the harvest completion delay timer starts counting
down. When the time is up, HGV and WV close and the freeze cycle starts. The harvest
cycle continues for at least 2 minutes until the minimum harvest cycle timer finishes
counting down.
In the water saver mode (Setting 5), WV closes and PM energizes when the water
saver timer starts counting down. PM de-energizes 5 seconds before the timer finishes
counting down. When the time is up, HGV closes and the freeze cycle starts.
If F/S is open (no water in tank) at the end of harvest cycle, the fill cycle starts.
In Setting 18, FM energizes when FM operation temperature is reached in the harvest
cycle.
4. Freeze Cycle
Comp continues to run, FM and PM energize. When the evaporator outlet temperature
goes down to 2°C, the minimum freeze cycle timer (5 minutes) starts counting down.
When F/S opens (no water in tank), the float switch delay timer starts counting down.
When the time is up, FM and PM de-energizes and the drain or harvest cycle starts.
But the freeze cycle continues until the minimum freeze cycle timer (5 minutes) finishes
counting down.
5. Drain Cycle
Comp continues to run and HGV opens. DV opens in 2 seconds and PM energizes to
drain out the water tank. After the set time has passed since DV opened, WV opens. DV
closes in 12 seconds and PM de-energizes to start the harvest cycle.
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