21
Operation Principle and Repair Method of Ice Maker & Dispenser
2. Function of Ice-maker
2-1. Initial Control Function
1. For the initial power on and when returning to the normal operation after power failure, the ice-maker detects that the ice-
maker container is horizontal after MICOM completes initialization,
In other words, the detection lever operates up or down.
2. Detects that the ice-maker container is horizontal with output signal high/low of Hall IC. In other words, performs
operation so that horizontality is kept by operating (CW rotation/ACW rotation) the ice separation motor so that high or
low voltage is applied to MICOM Pin (No. 42).
3. It determines as failure if there is no change of signal of Hall IC until a minute passes after operating the ice separation
motor, and stops the automatic ice-maker. In addition, it initializes the ice-maker if normal after continuous checking.
4. If deeming as the ice-maker container is horizontal, it determines that initial control is completed.
5. For a cycle time in the first power ON, it performs ice separation operation irrespective whether there is ice in the ice-
maker container.
2-2. Water Supply Control Function
1. If deeming as the ice-maker container is horizontal after ice separation control (normal ice separation control, ice
separation control on test function) is completed, it operates the water valve located at the M/C room of refrigerator to
supply water into the ice-maker container.
2. Quantity of water supplied is determined by supplying water for a constant time with the dip switch setup.
2-3. Ice-making Control Function
1. Ice-making control means status until water in the ice-maker’s water entirely becomes ice after water supply operation is
completed, and performs Ice-making Complete Operation by detecting temperature of the ice-maker container with an
ice-making sensor.
(Ice-making sensor is mounted on the bottom of the ice-maker container.)
2. ce-making control starts after completing water supply control or initial control.
3. It is determined ice-making is done if temperature of ice-making sensor reaches to -8
;
after 100 minutes has passed
from the time when water is supplied to the ice-maker container.
4. It is determined ice-making is completed if temperature of ice-making sensor reaches to -12
;
or less after 20 minutes
has passed in the above status.
3. Water supply is performed according to the changed time even if changing water supply quantity without powering off. In
change of the dip switch during water supply, water supply is performed according to the preset water supply time, and
water supply is performed according to the changed time from the next water supply.
4. Where water supply signal occurs at the water and the ice valve side at the same time, wait for water supplied from the
ice valve in the course of water supply. Water is supplied to the ice valve if supply from the water side is completed.
Simultaneous water supply is performed at the same time if water supply signal occurs in water supply to the ice valve side.
<Quantity of Water Supplied Table>
Dip switch setup
Water supply time
NO
S/W1
S/W2
S/W3
Remarks
1
2
3
4
5
6
7
8
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
6.5sec
5.5sec
6sec
7sec
7.5sec
8sec
9sec
10sec
ⅰ
Quantity of water supplied may vary depending on
setup status of the dip switch and may also vary
depending on hydraulic pressure as it is a type
directly connected with civil water.
(Generally quantity of water supplied by respective
time setting option is about 80~120 cc.)
ⅰ
Dip switch is located on the Main PWB.