LG GR-S392QVC Service Manual ▷ View online
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237A
241D
241A
241C
205A
205A
241A
233A
203A
235A
200A
230A
233B
210A
210A
231A
201A
244A
244C
212C
212A
*
212G
The following description is basically for GR-S462/GR-S512. For the other models, refer to the diagram of the entire PCB
circuit.
circuit.
7-1 FUNCTION
7-1-1 FUNCTION
1. When the appliance is plugged in, it is set to ‘Medium’. Each time the button is pushed, it is set to
‘Medium’
→
‘Medium/High’
→
‘High’
→
‘Low’
→
‘Medium/Low’
→
‘Medium’ in order.
2. When the power is initially applied or restored after a power failure, it is automatically set to ‘Medium’.
7. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM
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Temp
Control
Control
Medium/
Medium/
Low
Low
Medium
High
High
TEMP(˚C)
7
4
2
0
-2
ROOM
REFRIGERATOR
7-1-2 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 7-1-5 Error Diagnostic Mode.)
(Refer to 7-1-5 Error Diagnostic Mode.)
4. With the defective defrosting sensor (cut or short-circuited wire), the defrosting will not be performed.
7-1-3 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.
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.
7-1-4 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.
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)
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)
sensor is below 45 °C
(After a power failure or SVC)
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POWER
in 0.5 sec
COMP & COOLING FAN
ON
ON
POWER
in 0.5 sec
DEFROSTING
in 10 sec
DEFROSTING
ON
HEATER ON
HEATER OFF
in 0.5 sec
COMP & COOLING FAN
ON
When the power is turned on
7-1-5 ERROR DIAGNOSTIC MODE
1. The error diagnostic mode allows the SVC when a fault that may affect the performance of the product occurs while
operating the product.
2. Even if the function control button is pushed when an error occurs, the function will not be performed.
3. When the error is cleared while the error code is displayed due to a fault, the appliance returns to the normal condition
(Reset).
4. The error code is displayed by the refrigerator temp indication LED on the display of the refrigerator while the remaining
LEDs are off.
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R4
R3
R1
R2
NO
Error
Error Code Display
Cause
State of Operation with Error
R1 R2 R3 R4
Comp / Cooling fan
Defrosting heater
: ON
: OFF
1.
2.
3.
Faulty refrigerator(R)
sensor (on the control
box of the refrigerator)
sensor (on the control
box of the refrigerator)
Faulty defrosting sensor
Defrosting failure
Cut or short-circuited wire of
refrigerator sensor
refrigerator sensor
Cut or short-circuited wire of
defrosting sensor
defrosting sensor
Cut or disconnected wire of
defrosting heater or temperature
fuse(indicated at least 2 hours
later after the error occurs)
defrosting heater or temperature
fuse(indicated at least 2 hours
later after the error occurs)
15 min ON/
15 min OFF
No defrosting
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