LG Electronics GR-P227/L227, GR-P257/L257 service manual Super freezing, Miracle Zone function

MICOM FUNCTION

2-7. Super freezing

1.EXPRESS FRZ freezing is a function to increase the cooling speed of the freezer compartment by running both the compressor and the fan simultaneously.

2.EXPRESS FRZ is cancelled and the refrigerator returns to its default setting in the event of a power interruption.

3.SelectingEXPRESS FRZ changes only the speed of the cooling without affecting the set temperature.

4.The temperature can be adjusted even when EXPRESS FRZ has been selected and is in progress.

5.The freezer operates at whatever temperature was set at the time EXPRESS FRZ was selected.

6.If you select EXPRESS FRZ, the compressor and fan will run until it is deselected or the cycle time has elapsed. (3 hours : compressor and fan run / 3 ~ 24 hours : COLDEST operation)

7.If a defrost cycle occurs while an EXPRESS FRZ is already running, EXPRESS FRZ runs for its remaining cycle time after the defrost cycle is completed. If the defrost cycle takes longer than 30 minutes, EXPRESS FRZ will run for only 2 hours at the end of the defrost cycle.

8.If you press EXPRESS FRZ during a defrost cycle, the EXPRESS FRZ indicator (LCD or LED, depending upon the model) will illuminate but the compressor will not operate until the defrost cycle is complete.

9.If you press EXPRESS FRZ within 7 minutes of compressor cut-off, the compressor will not operate until the 7-minute delay has passed.

10.The freezer fan motor runs at high speed during the EXPRESS FRZ cycle.

2-8. *Miracle Zone function

1.Miracle Zone is located at the bottom room of R-room and maintains optimum temperature depending on foods through selection of desired foods kept in the Miracle Zone from vegetables to meat with a display.

Set temperature in the Miracle Zone by using a separate selection button at the right side of the Miracle Zone. Initial notch is in “veg.”status in application of power. Whenever pressing buttons, notch changes while LED is displayed in the order of “veg. → cheeze → meat → veg.”.

Provided that selected notch LED turns off if opening doors of the R-room and it turns off if closing doors of R-room.

2.Temperature of the miracle zone is controlled with a stemping damper at the left side of the miracle zone and controlled with a miracle zone at the rear side of miracle zone.

3.Change of the notch by temperature control S/W at the miracle zone is controlled after 10 seconds have passed after selecting final notches.

4.Miracle zone damper is forcedly closed during test mode or defrost mode.

2-9. Control of variable type of freezing room fan

Miracle Zone NOTCH	meat	cheeze	veg.
Setting Indication	-1°C	2°C	4°C

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 super freezing 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.

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