Icemaker Functions - LG LSSB2791ST Service Manual

ICEMAKER AND DISPENSER WORKING OPERATION 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 the hall sensor in MICOM pin.
3. Control Method to check if it is in place:
(1) The ejector is in place,
- It is an initialized control, so the mode can be changed to icemaking mode.
(2) The ejector isn't in place,
A. If the ejector is back in place within 2 minutes with the motor on, it is being initialized. If not, go to Step B.
B. Control the heater using the temperature sensor until the ejector reaches the correct location.
2-2. Icemaking Mode
1. Icemaking refers to the freezing of supplied water in the ice tray. 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 icemaking function is completed when the sensor reaches 19°F (-7°C), 55 minutes after starting.
4. If the temperature sensor is defective, the icemaking function will be completed in 4 hours.
NOTE : After Icemaker power is on, the icemaker heater will be on for test for 6 sec.
2-3. Buzzer Mode (Harvest Mode)
1. Harvest (Ice removing) refers to the operation where the ice cubes drop from the tray to the ice bin when icemaking has
completed.
2. Buzzer Mode (Harvest Mode)
(1) The Heater is ON for 30 seconds, then the motor starts.
(2) The feeler arm senses the quantity of ice in the ice storage bin while rotating with the ejector.
A. If the ice bin is full, the ejector stops and the heater is turned off.
B. If the ice bin is empty, the ejector rotates twice to eject the ice.
※ If the ejector does not rotate once within 5 minutes of B mode, separate heater control mode starts operating to prevent
the ejector from being constrained. (It is recommended that the user open for ice to return to normal mode.)
2-4. Fill/Park the ejector's 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
2
(FIRST STAGE)
3
5 sec.
5.5 sec.
6 sec.
INDICATIONS
20
REMARKS
The water amount will vary
depending on the water control
switch setting as well as the
water pressure of the connected
water line.