How To Deal With Claims - LG GR-B197GVQ Service Manual

4. HOW TO DEAL WITH CLAIMS
4-1.
Sound
TROUBLE DIAGNOSIS
-100-
Problems Checks and Measures
"Hiss" sounds
Explain general principles
of sounds.
?
All
refrigerator when functioning properly have normal operating sound. The
compressor and fan
produce
sounds.
There is
a
fan in the freezer
compartment
which blows cool air
to
freezer and
refrigerator compartments.
"Hiss" sounds
are
heard when the air passes
through the
narrow
holes into the freezer and refrigerator
compartments.
Cooling Fan sound in the compressor
compartment.
?
There is
a
fan
on
the back of the
refrigerator,
which cools the compressor
compartment.
If there is
a
small space between the
refrigerator
and the
wall,
the
air circulation sounds may be noticeable.
Noise of
Compressor.
?
This
operating
sound
happens
when the compressor compresses the
refrigerant. The compressor rotates at 3600RPM. The sound of compressor
operation
becomes louder
as
the
refrigerator capacity
increases.
Click sounds Explain the principles of temperature change.
?
The sounds
happens
when
pipes
and internal
evaporator
in the
refrigerator
compartment
expand
and
contract
as
the
temperature
changes during
the
refrigerator operation.
This sound also
happens during defrosting,
twice
a
day,
when the ice
on
the
evaporator
melts.
Clunk sound
Explain
that it
comes
from the compressor when the
refrigerator starts.
?
When the refrigerator
operates,
the piston and motor in the compressor rotate
at
3600RPM. This sound is caused
by
the vibration of
motor
and
piston
when
they start
and finish their
operation.
This
phenomena
can
be
compared
with that
of
cars.
When
an
automobile
engine starts,
it is loud
at
first but
quiets
down
quickly.
When the
engine stops,
so
does the vibration.
Vibration sound Check the sound whether it
comes
from the
pipes
vibration and friction.
?
Insert
bushing
or
leave
a
space between
pipes to
avoid the noise.
?
Fix the fan blade if the noise is due to the collision of fan and shroud.
?
Fix the
drip
tray
if it is loosened.
Sound
depends
on
the installation location.
?
Sound becomes louder if the
refrigerator
is installed
on a
wooden floor
or near a
wooden wall. Move it
to
the another location.
?
If the refrigerator is not leveled properly,
a
small vibration
can
make
a
loud
sound. Please
adjust
the level of the
refrigerator.