LG LSC27918ST Service Manual Download Page 15

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1-9. ICE PLUS

1) The purpose of this function is to intensify the cooling speed of freezer and to increase the amount of ice.
2) Whenever selection switch is pressed, selection/ release, the icon will turn ON or OFF.
3) If there es a power outage and the refrigerator is powered on again, ICE PLUS will be canceled.
4) To activate this function, press the Ice Plus key and the icon will turn ON. This function will remain activated for 24 hrs.
The first three hours the compressor and Freezer Fan will be ON. The next 21 hours the freezer will be controlled at the lowest
temperature. After 24 hours or if the Ice Plus key is pressed again, the freezer will return to its previous temperature.
5) During the first 3 hours:
(1) Compressor and freezer fan (HIGH RPM) run continuously.
   (2) If a defrost cycle begins during the first 90 minutes of Ice Plus, the Ice Plus cycle will complete its cycle after defrosting
has ended. If the defrost cycle begins when Ice Plus has run for more than 90 minutes, Ice Plus will run for two hours after the
defrost is completed.
   (3) If Ice Plus is pressed during defrost, Ice Plus icon is on but this function will start seven minutes after defrost is completed
and it shall operate for three hours
   (4) If Ice Plus is selected within seven minutes after compressor has stopped, the compressor (compressor delays seven
minutes) shall start after the balance of the delay time
(5) The fan motor in the freezer compartment runs at high speed during Ice Plus.
6) For the rest of the 21 hours, the freezer will be controlled at the lowest temperature.

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1-10. Control of variable type of freezing fan

1) To increase cooling speed and load response speed, MICOM variably controls freezing room fan motor at the high speed

of RPM and standard RPM.

2) MICOM only operates in the input of initial power or ICE PLUS operation or load response operation for the high

speed of RPM and operates in the standard RPM in other general operation.

3) If opening doors of freezing / cold storage room or home bar while fan motor in the freezing room operates, the freezing

room fan motor normally operates (If being operated in the high speed of RPM, it converts operation to the standard
RPM). However, if opening doors of freezing room or home bar, the freezing room fan motor stops.

4) As for monitoring of BLDC fan motor error in the freezing room, MICOM immediately stops the fan motor by determining

that the BLDC fan motor is locked or poor if there would be position signal for more than 115 seconds at the BLDC motor.
Then it displays failure (refer to failure diagnosis function table) at the display part of refrigerator, the BLDC motor doesn’t
operate more. If you want to operate the BLDC motor, turn off and on power resource.

1-11. Control of cooling fan motor

1) The cooling fan motor performs ON/OFF control by linking with the COMP.

2) It controls at the single RPM without varying RPM.

3) Failure sensing method is same as in fan motor of freezing fan motor (refer to failure diagnosis function table for failure

display).

1-12. Door opening alarm

1) Buzzer generates alarm sound if doors are not closed even when more than a minute consecutively has passed with

doors of freezing / cold storage room or home bar opened.

2) Buzzer rings three times in the interval of 0.5 second after the first one-minute has passed after doors are opened and

then repeats three times of On/Off alarm in the cycle of every 30 seconds.

3) If all the doors of freezing / cold storage room or refrigerator room are closed during door open alarm, alarm is immediately

released.