Function Of Icemaker - LG LSC27990TT Service Manual

ICEMAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR
2. ICEMAKER FUNCTIONS
2-1. Start Position
1. After POWER OFF or power outage, check the EJECTOR's position with MICOM initialization to restart.
2. How to check if it is in place:
- Check HIGH/LOW signals from HALL SENSOR in MICOM PIN.
3. Control Method to check if it is in place:
(1) EJECTOR is in place,
- It is an initialized control, so the mode can be changed to icemaking control.
(2) EJECTOR isn't in place:
A. If EJECTOR is back in place within 2 minutes with the motor on, it is being initialized. If not, go to Step B.
B. If EJECTOR is back in place within 18 minutes after the heater turns from ON to OFF, it is being initialized. If not, it is
not functioning. Repeat Step B with Heater and Motor off.
2-2. Icemaking Mode
1. Icemaking refers to the freezing of supplied water in the ice trays. Complete freezing is assured by measuring the
temperature of the Tray with Icemaking SENSOR.
2. Icemaking starts after completion of the water fill operation.
3. The Ice Making function is completed when the sensor reaches 19°F (-7°C), 1 ~ 4 hours after starting.
4. If the temperature sensor is defective, the ice-making function will be completed in 4 hours.
NOTE : After Icemaker Power is ON, the Icemaker heater will be on for test for 9 sec.
2-3. Harvest Mode
1. Harvest (Ice removing) refers to the operation of dropping cubes into the ice bin from the tray when icemaking has
completed.
2. Harvest mode:
(1) The Heater is ON for 30 seconds, then the motor starts.
(2) After performing Step 1 (the Heater is turned OFF), the Ejector will be back in place wthin 18 minutes. (Hall SENSOR
sign = OV). Ice removal is then complete. Then the Icemaker cycles to the Fill Mode. The water supply fails to start, it
is not functioning. Put the Heater and Motor in the off position. Restart every 2 hours. (Refer to fig.1)
2-4. Fill/Park Position
1. Once a normal harvest mode has been completed, the water solenoid will be activated.
2. The amount of water is adjusted by pressing the Fill Key repeatedly. This changes the time allowed for fill as illustrated in
the table below.
Water supply amount TABLE
STAGE TIME TO SUPPLY
1
5 sec.
5.5 sec.
2
(FIRST STAGE)
3
6 sec.
INDICATIONS
- 46 -
REMARKS
The water amount will vary depending
on the water control switch setting, as
well as the water pressure of the
connected water line.