LG GM-B208BVS, Service Manual

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8. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM
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8-1 FUNCTION
8-1-1 Function
1. When the appliance is plugged in, it is set to “4” for Refrigerator and “4” for freezer.
You can adjust the Refrigerator and the Freezer control temperature by pressing the ADJUST button,
2. When the power is initially applied or restored after a power failure, it is automatically set to “4” & “4”.
8-1-2 Control of freezer fan motor
1. Freezer fan motor has high and standard RPMs.
2. High RPM is used when electricity is first on, for ICE PLUS, and when refrigerator is overloaded.
But standard RPM is used for general purposes.
3. To improve cooling speed and load corresponding speed, the RPM of freezer fan motor shall change from normal speed to
high speed.
4. High speed (2500RPM): initial power on or load corresponding operation, ICE PLUS.
Normal speed (2200 RPM): general working conditions.
5. Fan motor is stopped when Refrigerator Door is opened.
6. The fan motor is stopped when Freezer Door is opened (only if compressor status is OFF)
8-1-3 Ice Plus
1. The purpose of this funstion is to intensify the cooling speed of freezer and to increase the amount of ice.
2. Whenever selection switch is pressed, selection/release, the LED will turn ON or OFF.
3. If there is a power cut and the refrigerator is power on again, ICE PLUS function will be canceled.
4. To activate these function you need to press the ICE PLUS key and the LED will turn ON. This function will remain activated
for 24 hrs. The first three hours the compressor and ICE PLUS 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. Fot the first three hours notice the following cases:
(1) Compressor and freezer fan (HIGH RPM) continuously operate for three hours.
(2) If defrost starts during ICE PLUS, ICE PLUS operates for the rest of time after defrost is completed, when ICE PLUS
operation time is less than 90 minutes.
(3) If ICE PLUS is pressed during defrost, ICE PLUS LED 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 cmpartment rotates at high speed during ICE PLUS.
For the rest of 21 hours, the freezer will be controlled at the lowest temperature.
8-1-4 Refrigerator Lamp Auto OFF
To protect the risk of lamp heat, when Refrigerator door opens for 7 min., Refrigerator lamp is auto off.