LG GR-349SQF Service Manual page 18

4) DOOR OPENING ALARM
(1) When the REFRIGERATOR DOOR is opened and won't be closed after 1 minute from the its opened, BUZZER sounds
to notify it.
(2) At frist, BUZZER sounds three times at each intervals of 0.5 second. Then makes a 0.5 second ON/OFF alarm three
times at intervals of 30 seconds.
(3) If the REFRIGERATOR door closed during ALARM, it is released.
FREEZER
CLOSE
DOOR
BUZZER
5) DISPLAY BUTTON RING
(1) If display function button(FREEZE TEMP, QUICK FREEZE, VACATION) of the front of the TOP COVER is pushed,
BUZZER rings with "DING~ DONG~"(See the BUZZER OPERATION CHECK)
6) DEFROSTING
(1) If the accumulated time for the operation of the COMPRESSOR is meet with 7 hours, the DEFROSTING HEATER is
started.
(2) The first defrosting is performed at 4 hours(compressor ON) later since the power is on.
(3) If DEFROST SENSOR is over 7¡C during DEFROSTING, end the operation of DEFROSTING with DEFROSTING
HEATER paused, And after 7 minutes, the operation for the freezing is started.
But, if DEFROST SENSOR is not reach to 7¡C after 2 hours' operation of the defrosting heater, it represents a defrosting
trouble.(See the TROUBLE REPRESENTING FUNCTION)
(4) If DEFROST SENSOR is short or open, defrosting is not performed.
7) ORDERLY OPERATION OF ELECTRIC PARTS
To avoid NOISE and DAMAGE, the items containing an electric parts such as COMP, DEFROSTING HEATER and FAN
MOTOR operate in order as follows.
OPERATION STATE
WHEN DEFROST SENSOR
TEMPERATURE IS OVER
7¡C. (WHEN PURCHASING
OR MOVING)
WHEN DEFROST SENSOR
TEMPERATURE IS BELOW
7¡C. (WHEN POWER
FAILURE OR SERVICING)
WHEN RETURNING TO NORMAL
STATE FROM TEST MODE
OPEN CLOSE OPEN
within 1 minute
1 minute
POWER
ON
after 0.5 sec.
POWER
ON
after 0.5 sec.
after 0.5 sec.
All Elec. Parts
OFF
after 7 min .
three three
times times
30
seconds seconds
OPERATION ORDER
COMP
ON
DEFROSTING
HEATER ON
COMP
ON
after 0.5 sec.
COMP
ON
- 18 -
CLOSE
three
times
30
after 0.5 sec.
DEFROSTING
HEATER ON
after 10 sec.
after 0.5 sec.
FAN
ON
FAN
ON
FAN
ON