30
have to open the tubing, re-evacuate it and then charge it with refrigerant.
2) Stoppage due to electric troubles
a) Thermostat
is out of control
Analysis of Trouble
In case the thermostat does not work in its good order or its
temperature
sensor
has
not
been
installed
properly,
frequent
stoppage is
also likely to occur.
Remedy
Try to
adjust the
temperature
sensor!s
position
until
the
compressor can
be started
and
stopped
normally.
If
this
cannot
be
achieved,
and the
stoppage
still
occurs
repeatedly,
it
is
most
likely
that
the
mechanical parts
or contacts
are
out
of
order,
disassemble
the
thermostat,
make
a
thorough
checkup
and repair it.
b) Overload of electric motor
Analysis of Trouble
Probably,
too
many
things
have
been
put
into
the
refrigerator, and
hence the
thermal
load
exceeds
its
refrigerating
capacity
;
or
in
case the
power supply
voltage
drops
considerably,
the
current
flowing
through the
motor will
increase
drastically
making
the
thermal
protector
actuate and the
fuse blown
,
and
hence
the
motor
stops
running. If
the
motor
is
still running
continuously in such a case , its windings will be burned out .
Remedy
Reduce
the
thermal
load,
pay
attention
to
the
variation
in
voltage of the
power supply.
c) Abnormal thermal
protection
Analysis of Trouble
The compressor
current
is
within
its
normal
range,
but
the
thermal
protector actuates repeatedly.
Remedy
Replace the thermal protector with a new one.
3) Sudden stoppage due to
other causes
Normal Stoppage
Start
and
stop
of
the compressor
is
generally controlled
by
a
thermostat .
When the
temperature
in
the
refrigerator
reaches
its
desired
value, the
thermostat
will
shut
down
the
compressor
automatically.
Never
take this
normal operation
as
a
trouble,
care
should
be
taken
to
differentiate it from
other real troubles in servicing.
D. Compressor won 't start
In case the compressor cannot be started, you must find out the origins
of this trouble through checkup step by step, because probably there are
many causes, including those electrical and mechanical.
1) Inspect the power supply to see whether it is connected to the
compressor circuit.
Anal sis of Trouble
y
Содержание HRB-271
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