LG GR-L208NN Service Manual page 29

MICOM FUNCTION
2-15. Failure Diagnosis Function
1. Failure diagnosis function is function to facilitate service when nonconforming matters affecting performance of product
during use of product.
2. In occurrence of failure, pressing the function adjustment button does not perform function and only alarm sound ("Ding~") rings.
3. If nonconforming matters occurred are released during display of failure code, MICOM returns to the original state (Reset).
4. Failure code is displayed on the display part of setting temperature for the freezing room and the display part of setting
temperature for the cold storage room of LED, which are placed at the display part of a refrigerator. All the LED graphics
other than a failure code are turned off.
No. Trouble items
1 Abnormal freezer(F)
sensor
2 Abnormal
refrigerator sensor
1(R1) (upper shelf
in the refrigerator)
3 Abnormal
refrigerator sensor
2(R2) (lower shelf in
the refrigerator)
4 Abnormal defrost
sensor
5 Faulty defrost
6 Abnormal freezer
BLDC fan motor
7 Abnormal cooling
BLDC fan motor
8 Abnormal room
temperature sensor
9 Abnormal icemaker
sensor
10 Abnormal icemaker
unit
Trouble Code Indicator
F4 F3 F2 F1
Freezer sensor is cut or short-
circuited
Upper shelf refrigerator sensor is
cut or short-circuited.
Note 1) Lower shelf refrigerator sensor is
cut or short-circuited.
Defrost sensor is cut or short-
circuited
Defrost heater and temperature
fuse are cut and disconnected.
(Indicates after at least four hours
when troubles occur)
No position-signal over 65s when
fan motor operate
No position-signal over 65s when
fan motor operate
Note 1) Room temperature sensor (RT-
Sensor) is cut or short-circuited.
Note 1) Icemaker sensor is cut or short-
circuited.
Note 1) Fauity motor or hall IC in
icemaker unit. Lead wire is cut or
shotr-circuited. Faulty motor
driving circuits
Troubles
Compressor
15 min on/
15 min off
- 29 -
: On : Off
Operation Status During Trouble
Freezer Cooling Defrost
Fan Fan Heater
Standard
RPM
Standard
RPM
Standard
RPM
No defrost
Standard
RPM
Standard
RPM
OFF (check
opeati o n per
30mi n . If normal
condi t i o n, reset)
OFF (check
opeati o n per
30mi n . If normal
condi t i o n, reset)
Standard
RPM
: Normal
Stepping
Motor Damper
Open for
10min
Close for
15min