LG GC-B379S*QA Service Manual page 24

Unlock
Display power-saving mode
Power- saving mode on/off method:
• on : If the display buttons are not pressed during 20 seconds or
more, the mode starts automatically .
• off : press 1 time any button during power- saving mode.
DISPLAY operation of power- saving mode:
• in the process of power- saving mode, all indications are turned
off, except Lock Icon.
• when the mode turned off, display shows the previous state of
the power-saving mode.
GC-B379S*QA/GC-B409S*QA
5. DOOR OPEN ALARM
(1) Buzzer shall give warnings if freezer, refrigerator, or home
bar door is open for more than one minute.
(2) Buzzer shall give warnings three times in 0.5 second
interval, then three times on/off in 0.5 second interval in
every thirty seconds.
(3) Warnings are ceased when freezer, refrigerator and
home bar doors are all closed.
FREEZER
REFRIGERATOR CLOSE CLOSE
DOOR
CLOSE CLOSE
BUZZER
within
1 minute
6. BUZZER SOUND
(1) When the button on the front Display is pushed,
a Ding ~ sound is produced.
(Refer to the BUZZER OPERATION CHECK)
7. DEFROSTING (REMOVING FROST)
Unlock
Lock
500 ms
1 min
30 sec
MICOM FUNCTION & PCB CIRCUIT EXPLANATION
(1) Defrosting starts each time the COMPRESSOR running time
limit 50 hours.
(2) When door is opened for 1 second limit time will be reduced
on 8 minut but totally not less than 7 hours
p o w r e o
(3)For initial
when the compressor running time reaches 4 hours.
(4) Defrosting stops if the sensor temperature reaches 8°C or more.
If the sensor doesn't reach 8°C in 2hours, the defrost
mode is malfunctioning. (Refer to the defect diagnosis function.)
(5) Defrosting won't function if its sensor is defective (wires are
cut or short circuited)
8. ELECTRICAL PARTS ARE TURNED ON SEQUENTIALLY
Electrical parts such as COMP. defrosting heater. freezer FAN. etc.
are turned on in the following order to prevent noise and
parts damage. Several parts are started at the dame time at initial
power on and are turned off together when TEST is
completed. (PIC.1)
10. DEFECT DIAGNOSIS FUNCTION
(1) Automatic diagnosis makes servicing the refrigerator easy.
(2) When a defect occurs, the buttons will not operate: but the
tones, such as ding, will sound.
(3) When the defect CODE removes the sign, it returns to normal
operation (RESET).
(4) The defect CODE shows on the Refrigerator and Freezer Display.
(PIC.2,3)
CLOSE
GC-B379S*CA
GC-B409S*CA
EXPRESS FRZ. FREEZER
24
n d f e o r t s n i g t s r a s t
-15 · -20 · -23 °C 6 · 3 · 0 °C
FRIDGE
ECO FRIENDLY