LG GC-B379S*QA Service Manual page 25

MICOM FUNCTION & PCB CIRCUIT EXPLANATION
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
Figure 1
Designation and confirmation of different failure
(GC-B379S*QA/GC-B409S*QA)
NO Item
Normal
1.
Failure of freezer
2.
sensor
Failure of Refigerator
3.
sensor
Failure of defrost
4.
sensor
Ambient sensor
5.
failure
6. Poor of defrost
7. Connection failure
8.
9.
Figure 2
POWER
in 1/2 second
ON
POWER
in 1/2 second
ON
COMP
in 1/2 second
&
C-FAN
ON
TOTAL LOAD
OFF
ERORR CODE
Details of the failure
Freezer and Refigerator
temperature setting
Setup temperature
indication
Freezer sensor disconnection or
FS E
short circuit
Refrigerator sensor
rS E
disconnection or short circuit
Defrost sensor short circuit or
dS F
disconnection
Ambient sensor short circuit or
rt E
disconnection
120 minutes after defrost
dH F
starting if the defrost
sensor is not more than 7 C°
Connection failure between
CO E
Main PCB and Display PCB
FF E
CF E
EXPRESS FRZ.
ORDER
COMP
&
F- FAN
C-FAN
ON
ON
DEFROSTING
in 5 second
HEATER ON
DAMPER
in 1/2 second
F- FAN
FRIDGE
ON
ON
in 7 minute COMP
in 1/2 second
ON
REMARKS
Normal Display Switch
-
Check sensor wiring
Temperature Fuse
disconnection, heater
disconnection, Drain blockage,
heater driving Relay failure
Connection wiring and
transmittion TR, receiver failure
25
DAMPER
in 1/2 second
FRIDGE
ON
DEFROSTING
in 1/2 second
HEATER OFF
FREEZER FAN
ON