Maintenance Service And Troubleshooting - Hisense RS-11DC4S Service Manual

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Maintenance service and Troubleshooting.

5
DEFECT EFFECT
Group Evaporator dose not frost even
partially or though motor-compressor runs
completely continually.
out of
refrigerant
charge
Excessively This defect is indicated by the
full presence of water outside
refrigerator near the motor
caused by formations of ice on
the return tube.
Humidity in This defect is indicated by the
the system partial frosting of the
evaporator and by continual
defrosting cycles determined by
the interruption of the flow of
gas on the evaporator. the
motor compressor keeps
running.
Presence of Poor performance of the
air in the refrigerant system which is
system indicated: on the evaporator
with a slight frost which dose
not freeze and an excessive
overheating of the condenser
and motor-compressor.
Blocked Because of the lack of
capillary circulation Freon in the system,
there is no frosting of the
evaporator, while a slight
overheating of the first spiral of
the condenser is noted.
Motor The system dose not work and
compressor the "clixson" intervenes
short-circuite interrupting delivery to the
d or blocked motor- compressor.
Motor-compr No frost forms on the
essor dose evaporator even if the
not compress motor-compressor is apparently
running regulary
Noisy In case of mechanical failure in
motor-compr the motor-compressor there in
essor an excessive noise when the
system is functioning in case a
suspension spring is unhooked
banging will be heard and there
will be especially strong
vibrations when the system
starts up and stops.
Refrigerator (freezer)
CAUSE
An empty refrigerant system
indicates a leakage of R600a.this
loss is generally to be looked for at
the soldering points connecting the
various components or in an
eventual hole in the evaporator
made by the user.
If in the refrigerant system a
quantity of R600a is introduced
which is greater than that
indicated, the excess gas dose not
terminate its expansion in the
evaporator but proceeds into the
return tube.
The refrigerant system is humid
when there is a small percentage of
water present which not completely
retained by the dehydrator filter,
enters into circulation with the
Freon and freezes at the capillary
exit in the evaporator.
There is air in a refrigerating
system when during the filling
phase vacuum is not effected or it is
not adequately done.
Eventual impurities contained in
the Freon or in the components of
the refrigeration system before
assembly and not retained by the
filter can obstruct the capillary.
In case of short circuit the
breakdown is due to the electric
winding if blocked, there is a
mechanical failure in the
motor-compressor.
In this case there is a mechanical
failure in the diaphram valves
which remaining continually open,
do not permit the piston to suck and
compressor the which
consequentely dose not circulate in
the system.
The cause of the excessive noise is
normally to be sought for in a
mechanical break down and only
rarely in the unhooking of one of
the suspension springs.
6
Service manual
REMEDY
Leakage must be
eliminated by re-soldering
the defective point or
substituting the damaged
evaporator.
The system must be
emptied and subsequently
refilled introducing the
correct quantity of
R-600a.
The system must be
emptied and then refilled
after eliminating the
humidity.
Group must be drained
and subsequently refilled
after carefully creating
vacuum.
To restore the system it
must be emptied,
substitute the capillary or
the evaporator entirely in
case the capillary is
coaxial with respect to the
return tube, then refill it.
The motor-compressor
must be replaced and then
proceed with refilling.
The motor-compressor
must be replaced and then
proceed with refilling.
The motor-compressor
must be substituted and
then proceed with the
refilling.
Single door serial