Description Of Function & Circuit Of Micom - LG LRFC22750SW Service Manual

9. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM
9-1 FUNCTION
9-1-1 Function
1. When the appliance is plugged in, it is set to 37°F for Refrigerator and 0°F 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 "37" & "0".
REFRIGERATOR TEMP
COLDER WARMER
Control range : 32°F ~ 47°F
0°C ~ 8°C
9-1-2 How to Toggle the Display between °F & °C
1. The display temperature mode can be changed from °F to °C or °C to °F by pressing and holding the COLDER FREEZER TEMP
and the COLDER REFRIGERATOR TEMP keys at the same time for over one second.
2. The initial setting is °F. Whenever the mode is changed, the LED lights are changed.
9-1-3 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 express freezing, and when refrigerator is overloaded.
Standard RPM is used for normal usage.
3. Fan motor stops when refrigerator of freezer door opens.
9-1-4 EXPRESS FREEZING
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 LED will turn ON or OFF.
3. If there is a power outage and the refrigerator is powered on again, EXPRESS FREEZING will be canceled.
4.To activate this function you need to press the Express Freezing key and the LED 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 21hours the freezer will
be controlled at the lowest temperature. After 24 hours or if the Express Freezing 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 Express Freezing, the Express Freeze cycle will complete its
cycle after defrosting has ended. If the defrost cycle begins when Express Freeze has run for more than 90 minutes,
Express Freeze will run for two hours after the defrost is completed.
(3) If EXPRESS FREZZING is pressed during defrost, EXPRESS FREZZING LED is on but this function will start seven
minutes after defrost is completed and it shall operate for three hours.
(4) If EXPRESS FREZZING 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 rotates at high speed during EXPRESS FREZZING.
6. For the rest of 21 hours, the freezer will be controlled at the lowest temperature.
9-1-5. REFRIGERATOR LAMP AUTO OFF
1. To protect the risk of lamp heat, when Refrigerator door opens for 7 min., refrigerator lamp is auto off.
EXPRESS
FREEZING
37 °F IS RECOMMENDED
- 23 -
0 °F IS RECOMMENDED
Control range : -6°F ~ 8°F
FREEZER TEMP
COLDER WARMER
-21°C ~ -13°C