LG GR-642APA, Service Manual

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7-1-6 BUZZER SOUND
1. When the button on the front Display is pushed, “Ding-” sound is produced and it works as follows.
7-1-7 CONTROL OF DOUBLE COOLING FAN IN THE REFRIGERATOR COMPARTMENT.
1. To raise the refrigerating speed, fan motor in the refrigerator compartment is operated when the door of freezer room or
refrigerator room is opened and then closed.
2. The fan motor is stoped after 20 sec. when the door is closed.
7-1-8 DEFROSTING
1. The defrosting is performed each time when the total running time of the compressor reaches 7 hours.
2. After the power is turned on (or restored after a power failure), the defrosting starts when the total running time of the
compressor reaches 4 hours.
3. When the temperature of the defrosting sensor reaches 10 °C or above, the defrosting stops. If the temperature does not
reach 10 °C in 2 hours after the defrosting starts, the defrosting error code is displayed.
(Refer to 7-1-10. Error Diagnostic Mode.)
4. With the defective defrosting sensor (cut or short-circuited wire), the defrosting will not be performed.
7-1-9 SEQUENTIAL OPERATION OF ELECTRIC COMPONENTS
The electric components, such as the comp, defrosting heater, and cooling fan, start sequentially to avoid the noise and
damage to the part, which may result from the simultaneous start of various components on turning the power on or after
the completion of a test.
Condition of Operation Operating Sequence
If the temp of the defrosting
sensor is 45 °C or above
(For the initial use after the
purchase or grounding)
If the temp of the defrosting
sensor is below 45 °C
(After a power failure or SVC)
When returned from the Test mode
- 20 -
POWER
in 0.5 sec
COMP
in 0.5 sec
COOLING FAN
ON ON ON
ALL LOADS
in 7 min
COMP
in 0.5 sec
COOLING FAN
OFF ON ON
POWER
in 0.5 sec
DEFROSTING
in 10 sec
DEFROSTING
ON HEATER ON HEATER OFF
in 0.5 sec
COMP
in 0.5 sec
COOLING FAN
ON ON
When the power is turned on