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GC-B207GLQV
LG GC-B207GLQV User Manual
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Ch
eck
fan
motor(C
onn
ec
tor,
Frozen
Lo
cke
d)
Remove
No
Yes
Is t
he
f
eedba
ck
voltage
be
tw
een
pi
n 9
and
pin10
of
CON8
li
ke as
be
low?
(from
motor
to main
boa
rd)
N0
Yes
No
T
es
t Point
R
es
ult
pi
n12 To
pin9
12
~
16
V
T
es
t Point
R
es
ult
Pin10
To
pi
n9
1
~ 4 V
Yes
No
H
ou
sing
Main
P
CB
B
O/
BL
CON8
10
12
9
5
4
3
YL
PR
F-FA
N
1
2
3
RD
PR
BK
W
iring
diagram
Fr
ee
zer
F
an
voltage
F
eedbac
k v
oltage
Yes
Freezer
Fan E
rr
or
Yes
Pin12
P
in9
Pin10
Pin9
Is i
t display
ed
unde
r picture?
Is t
he
co
nne
cti
on
l
oos
e ?(CON8)
R
ec
onn
ec
t
Enter the T
ES
T 1 MODE
Is
voltage
v
al
ue
be
tw
een
pins
9
&
12
of CON8
as
be
low
?
Explain
to the customer!
Repl
ac
e
MA
IN PCB
Repl
ac
e
MA
IN PCB
- 40-
39
41
Table of Contents
Table of Contents
2
Warnings and Precautions for Safety
3
Compressor
4
Defect Determination Criteria
4
Inverter Linear Compressor
4
Method to Measure Compressor Winding Resistance
4
Specificatio S
4
Comp Operation
5
Determination of Comp Operation
5
Method to Determine Defect of Inverter Linear Drive
5
Protective Logic (Trip)
5
Bridge Diode Inspection
6
Fuse Inspection
6
Inverter Parts Inspection
6
Compressor
6
Parts Defect Determination in Power on Status
7
Features of R600A Refrigerant
8
Eatures of R600A Refrigerator
8
Checkpoints before Heavy Repair
8
Heavy Repair Method of Refrigerator by Application of Refrigerant
8
Heavy Repair SVC Method
9
Return of Refrigerator Refrigerant
9
Return of Remained Refrigerant
10
Welding Repair Step
10
Charging Tube Connection Step
11
Vacuum Air Removal
11
Leak Inspection and Cycle Check
12
Refrigerant Charging
12
Failure Checking Procedures
13
Heavy Repair Method of Refrigerator by Application of Refrigerant
13
Specifications
14
Parts Identification
15
How to Adjust Door Height of Refrigerator
16
How to Install the Refriger Ator
16
Monitor Panel
17
Funnction of Temperature Selection
17
Micom Function
17
Buzzer Sound Selection Button
18
Defrost Function
18
Door Open Alarm
18
The Control of Variable-Speed Fan in Freezer
18
Electrical Device Operation Sequence
19
Explanation for PWB Circuit
20
Power Circuit
20
Oscillation Circuit
21
Reset Circuit
21
Door Opening Sensing Circuit
22
Explation for Micom Circuit
22
Temperature Sensing Circuit
23
Switch Entry Circuit
24
Stepping Motor Operation Circuit
25
Fan Motor Driving Circuit (Freezing Room)
26
Compensation Circuit for Weak-Cold, Over-Cold a T F R E E Z N I G R O O M
27
Sensor Resistance Characteristics Table
29
PWB Assembly Main Parts Drawings
30
PWB Parts Drawings and List
30
Circuit
32
Error Code Summary
33
Micom Error Code
33
Sensor Position Map
34
Sensor Error
35
Troubleshooting with Error
35
R1 Sensor Error
36
D Sensor Error
37
Defrost Heater Error
38
Freezer Fan Error
40
Condenser Fan Error
41
Communication Error
42
Refrigerator2 Sensor Error
44
Freezer-Lamp (LED) Doesn’t Work
45
Refrigerator-Lamp (LED) Doesn’t Work
46
Poor Cooling in the Refrigerator Compartment
47
Strong Cooling in the Refrigerator Compartment
49
How to Remove Terminal Position
51
How to Start Test Mode
51
Wire Color
51
Resistance of Sensor
52
Faulty Start
53
Trouble Diagnosis
53
Trouble Shooting
53
No Cooling
54
Refrigeration Is Weak
55
Faults
56
Dew and Ice Formation
58
No Automatic Operation
58
Warm Refrigerator Compartment Temperature
58
Faulty Internal
61
Faulty Lamp
61
Summary of Heavy Repair
81
Practical Work for Heavy Repair
82
Precautions During Heavy Repair
83
Charging Sequence
84
Pipe Connection
84
Vacuum Sequence
84
Standard Regulations for Heavy Repair
85
Brazing Reference Drawings
86
How to Deal with Claims
87
Sound
87
Measures for Symptoms on Temperature
89
Odor and Frost
90
How to Disassemble and Assemble
92
Door
92
Handle
93
Shroud, Grille Fan
93
Exploded View
94
Exploded View
98
4
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LG GC-B207GLQV Specifications
General
Brand
LG
Model
GC-B207GLQV
Category
Refrigerator
Language
English
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