LG GR-459GTCA Service Manual page 24

7) REFRIGERATOR LAMP AUTO OFF
(1) To protect the risk of lamp heat, when Refrigerator door opens for 7 min., refrigerator lamp is auto off.
8) DEFROSTING (REMOVING FROST)
(1) Defrosting starts each time the COMPRESSOR running time reaches 7 hours.
(2) For initial power on or for restoring power, defrosting starts when the compressor running time reaches 4hours.
(3) Defrosting stops if the sensor temperature reaches 10°C or more. If the sensor doesn't reach 10°C in 2hours, the defrost
mode is malfunctioning. (Refer to the defect diagnosis function.)
(4) Defrosting won't function if its sensor is defective(wires are cut or short circuited)
9) 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.
OPERATION STATE
Temperature of Defrosting
Sensor is 45°C or more
(when unit is newly
purchased or when moved)
Temperature of defrosting
sensor is lower than 45°C
(when power cuts, SERVICE)
Reset to normal operation from
TEST MODE
NOTE) (1) In the case of BEST/ BETTER model, dispenser heater is optional.
(2) Damper heater is only applied in the BEST model.
(3) Damper heater and Dispenser heater are not in the GOOD model.
POWER
in 1/2 second
ON
POWER
in 1/2 second
ON
DAMPER
in 1/2 second
HEATER ON
DISPENSER
in 3 second
HEATER ON
FREEZER
in 1/2 second
FAN ON
TOTAL LOAD
in 7 minute
OFF
- 24 -
ORDER
COMP
in 1/2 second
ON
DEFROSTING
in 5 second
HEATER ON
DAMPER
in 3 second
HEATER OFF
DISPENSER
HEATER OFF
COMP
in 1/2 second
ON
FREEZER FAN
ON
DEFROSTING
HEATER OFF
in 1/2 second
COMP
in 1/2 second
ON
FREEZER FAN
ON