LG GR-B197GVQ Service Manual page 70

TROUBLE DIAGNOSIS
-70-
CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK
3.
Refrigeration
is weak.
4) No cooling air circulation.
5) Compressor capacity.
6) Refrigerant
too much
or
too little.
7)
Continuous
operation
-
No
contact
of
temperature
controller.
-
Foreign
materials.
8) Damper
opens
continuously.
Foreign
materials
jammed.
Failed
sensor.
-
Position of
sensor.
Characteristics
of
damper.
9)
Food
storing place.
-
Near the outlet of
cooling
air.
Faulty
fan
motor.
Small
cooling
air
discharge.
Fan is
constrained.
Insufficient
motor
RPM
Faulty fan.
Shorud.
Bent.
Ice and
foreign
materials
on
rotating
parts.
Fan shroud contact.
-
Clearance.
Damping
evaporator
contact.
Accumulated residual frost.
Fan misuse.
Bad
shape.
Loose connection.
-
Not tightly connected.
Insert
depth.
Rating misuse.
Small
capacity.
Low
valtage.
Malfunction of charging cylinder.
Wrong setting
of
refrigerant.
Insufficient compressor.
-
Faulty
compressor.
Fan overload.
-
Fan misuse.
Bad low
termperature
RPM characteristics.
Rated power misuse.
Low
voltage.
P/U liquid dump.
EPS
water
sediment.
Screw.
Bad characteristics of its
own
temperatue.
Parts misuse.
Charge of
temperature
-
Impact.
characteristics.
Check
visually
after
disassembly.
Check
visually after
disassembly.