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2. Function of Ice Maker
2-1 Initial Control Function
1. When power is initially applied or reapplied after power cut, it detects level of ice maker cube mold after completion of
MICOM initialization. The detecting lever moves up and down.
2. The level of ice maker cube mold is judged by output signal, high and low signal, of Hall IC. Make the cube mold to be
horizontal by rotating ice ejection motor in normal or reverse direction so that High/Low signal can be applied to MICOM
Pin No.42
3. If there is no change in signal one minute after the geared motor starts to operate, it stops icemaker operation and check
the signal every hour. It resets initialization of icemaker when it becomes normal.
4. It judges that the initial control os completed when it judges the icemaker cube mold is horizontal.
5. Ice ejection conducts for 1 cycle regardless of ice in the ice bin when power is initially applied.
2-2 Water Supply Control Function
1. This is to supply water into the icemaker cube mold by operating water valve in the mechanical area when ice ejection
control is completed and ice maker mold is even.
2. The quantity of water supplied is determined by DIP switch and time.
Water Supply Quantity Table
DIP SWITCH SETTING
No
S1
1
OFF
OFF
2
ON
OFF
3
OFF
ON
ON
ON
4
5
6
7
8
3. If the water supply quantity setting is changed while the power is on, the change will take effect immediately. If it is
changed while the icemaker is filling the mold, the new setting will take effect the next time the, icemaker cycles.
4. When water supply signal is applied to water and ice valves at the same time during water supply, water shall be supplied
to water valve. If water supply signal is applied to ice valve during water supply, water shall be supplied to both water and
ice valves.
2-3 Icemaking Control Function
1. Icemaking control is carried out from the completion of water supply to the completion of ice making in the cube mold.
Icemaking sensor detects the temperatures of cube mold and completes ice making. (Ice making sensor is fixed below
ice maker cube mold).
2. Icemaking control starts after completion of water supply control or initial control.
3. The icemaker determined it's cycle is completed when the Icemaking sensor reaches -8°C (17.6°F) after 100 minutes
have passes since water filled the mold.
4. It is judged that icemaking is completed when icemaker sensor temperature reaches belows -12°C after 20 minutes in
condition 3.
2-4 Ice ejection Control Function
1. This is to eject ice from ice maker cube mold after icemaking is completed.
2. IF Hall IC signal is on within 3 6/10 seconds after ice ejection motor rotates in normal direction, it does not proceed ice
ejection but waits. If the ice bank is full, ice ejection motor rotates in normal direction in every hour to check the condition
of ice bank. If the ice bank is not full, the water supply control starts after completion of ice ejection control. If the ice bin is
full, ice ejection motor rotates in reverse direction and stops under icemaking or waiting conditions.
3. If ice bin is not full, ice ejection starts. The cube mold tilts to the maximum and ice is separated from the mold and ice
checking lever raises.
4. Ice ejection motor stops for 1 second if Hall IC signal changes from OFF (low) to ON (high) after 3 6/10 seconds when ice
ejection motor rotates in normal direction. If there is no change in Hall IC signals within 1 minute after ice ejection motor
operates, ice ejection motor stops as ice ejection motor or hall IC is out of order.
Water Supply Time
S2
6.5SEC
5.5SEC
7.5SEC
8.5SEC
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