2-2. Control of Variable Speed Fan in the Refrigerator Compartment
1. Fan motor in the freezer compartment shall change from standard to high speed rpm in order to increase cooling speed
and load corresponding speed.
2. High speed rpm is only used for the initial power application and load corresponding operation. But standard rpm is
used in the general working conditions.
3. Fan motor in the freezer compartment operates normally when freezer, refrigerator, or home bar door opens and fan
motor in the freezer compartment operates (the speed changes from high to standard rpm if fan motor operates at high
speed rpm). But fan motor in the freezer compartment stops when refrigerator or home bar door is open and refrigerator
compartment door is closed.
2-3. Door Opening Alarm
1. Buzzer warns when freezer, refrigerator, or home bar door is kept open for more than 1 minute.
2. Buzzer warns 3 times at 0.5 second interval and then 3 times at 0.5 second on and off in every 30 seconds if door is kept
open for more than 1 minute.
3. Warning is released when freezer, refrigerator, or home bar door is closed during door opening alarm.
2-4 Button Selection Buzzer Sound
1. “Bell” sounds when button on the front display is pressed.
2-5. Forced Start, Forced Defrost Buzzer Warning
1. When test button in the main PWB is pressed, “beep” sounds.
2. When forced start is selected, warning sounds three times for 0.2 second on and 1.8 seconds off.
3. When forced defrost is selected, warning sounds three times in the following cycle: 0.2 second on and 0.2 second off, 0.2
second on and 0.2 second off, and 0.2 second on and 1.0 second off.
2-6. Functions of Defrost
1. Defrost starts whenever the compressor operation time accumulates to seven to seven and a half hours.
2. Defrost starts whenever the compressor operation time accumulates to four to four and a half hours if power is initially
applied (or reapplied after power cut).
3. Defrost completes when the temperature of defrost sensor reaches at 5 °C. Faulty defrost is indicated if the defrost
sensor does not reach at 5 °C after 2 hours of defrosting.
4. Defrost does not work when defrost sensor is out of order (wire cut or short-circuit).
MICOM FUNCTION
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