Section 3
Operation
Part Number 040003628 08/13
3-5
Ice Making Sequence of Operation
INITIAL START-UP
1.
Water Inlet and Pressure Equalization
Turn the toggle switch to”ON” positon,the water fill valve
and harvest valve are energized, 210 seconds later, the
water fill valve is de-energized. 20seconds after the
harvest valve solenoid is energized, the compressor is
energized. 300seconds after the compressor is
energized, the harvest valve solenoid is de-energized,
the water pumpand the fan motor are
energized,machine goes into freeze cycle.
2.
Freeze Cycle
The pump sprays water into the inverted cups. The
water freezes layer by layer, until an ice cube forms in
each cup.
When the”water temperature”is equal to or less than 2
℃
for more than 5 seconds, control will read
the” liquid line temperature” and dip switch setting , get
the” freeze postpone time” and “fan shut off time”.Board
will shut the Fan before the end of the freeze cycle to
assist harvest. When the ” freeze postpone time” has
elapsed, the harvest cycle is initiated.
3.
Harvest Cycle
The compressor continues to operate and the water
pump is de-energized. The hot gas valve energizes,
allowing hot gas to enter and warm the evaporator. The
water valve is also energized, aiding with harvest, as
well as filling up the sump with fresh water for a new
freeze cycle.
at the point of 2 minutes to freeze end , board will read
the ” liquid line temperature”again and calculate the
“harvest time”
The ice falls from the cups and is directed into the bin by
the ice chute. The harvest cycle continues until the
harvest time has elapsed,then machine goes into a new
freeze cycle
4.
Automatic Shut-Off
When the storage bin is full, the ice will come in contact
with the bin thermostat which is located inside the bin.
The machine will stop after approximately 45seconds of
continuous ice contact with the bin thermostat probe.
The ice machine remains off until a 3 minutes delay has
elapsed and enough ice has been removed from the
storage bin to allow the ice to fall clear of the bin
thermostat probe. As the ice clears the probe, the bin
thermostat warms up and the machine starts another
freeze cycle.
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