22
mper
hand ,you will
d) have a sense of slight heat .In case dew condensation appears due
to the fact that its temperature is obviously lower than the ambient
temperature ,this means that most meshes of its screen has been
clogged
,resulting
in
an
obstructed
flowing
of
refrigerant
,thus
causing a
drop in temperature due to throttling .
e)
Feel
the
temperature
of
exhaust
gas
from
the
refrigerating
system
.the
exhaust
gas
should
be
very
hot
and
this
is
the
normal
working
state .For
those
refrigerator
with
enclosed
type
of
compressor
refrigerating
system,
no
frost
or
dew
drop
will
from
on
the
gas
suction
tube ,otherwise
,there
is
something
wrong
in
the
system
(Frosting
and dew
condensation may
appear for a very short time period
when just starting the
machine ,this is a normal phenomenon ).
Because a refrigerator is
a
combination of several components ,they are
related
and
have
influence
on
each
other
.In
case
an
abnormal
phenomenon
has
been
found
through
the
above-mentioned
checkups ,you
need not
to
make
a
hasty
conclusion
based
on
only
one
abnormal
phenomenon
.It
is
advisable
to
find
out
two
or
more
abnormal
phenomenon
,or
conduct
troubleshooting
comprehensively
with
the
aid of
instruments
or
other
ways
,because
several
kinds
of
troubles
may
share a
common
abnormal
phenomenon
,and
two
or
more
abnormal
phenomena
may occur
simultaneously
due
to
a
certain
trouble
.With
this
method ,you
can reject some suspicious troubles and finally make a correct judgment .
7 Analysis of Troubles and Troubleshooting
A.
Poor Refrigerating Effect
The
so-called "poor
refrigerating
effect "
refers
to
the
fact
that the
refrigerator
can
operate
and
refrigerator
normally
,but
the
temperature in
the refrigerator
cannot
drop
to
the
prescribed
value
under
the
stipulated
working
conditions
.In
view
of
there
are
many
causes
for
this
phenomenon
,we
are
going
to
discuss
and
analyze
it
in
the
following 7
aspects :
1) Leakage of refrigerant
Analysis of Trouble
The
leakage
of
refrigerant
in
the
system
will
result
in
an
insufficient
Cooling
capacity
,the
resulting
phenomena
are
its
lower
gas
suction
pressure
and
exhaust
pressure
as
well
as
higher
exhaust
gas
temperature
.The
exhaust
tube
feels
rather
hot
,and
a
continuous gas
flowing
sound
louder
than
usual
can
be
heard
at
the
outlet
of the
capillary ,and no frost or a smaller quantity of loose frost appears on the
evaporator .After shut down ,the balance pressure in the system is usually
lower than the saturation pressure corresponding to the same ambient
te
ature .
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