The Solution For The Common Problem - Hisense RD-31WC4S series Service Manual

There is a peculiar
smell in the units
the forefront or the
middle cabinet heats
Refrigerator's two
sides or the back heat
the cabinet surface
condensation

◆The solution for the common problem.

1.Cooling is not enough good
(Many reasons might cause that cooling not enough good, as blow :)
Reason
1) Leakage of Gas
2) The quantity of Gas is
too much
3) There is air in the
liquid cycle system
contracting or expanding, this sound will be made, which is normal.
5.8 The motor operation sound in the compressor is appears to be louder at night or
begin starting. which is a normal phenomenon; also the uneven placing would lead to
too much running noise.
6.1 Is the food with special smell sealed tight?
6.2 Does it have long time storing food or degenerated food?
6.3 Whether the internal cabinet needs cleaning.
7.1 As fridge Anti-condensation tube is placed here and caused the above phenomenon,
which is normal.
8.1 As condensation tube is placed here and caused the above phenomenon, which is
normal.
9.1 Air humidity is too large.
Analysis
If some gas leaked unit will work not well.
Phenomenon of failure:
a. lower pressure of liquid cycle system
b. high temperature of copper tube of
discharging gas, hand feels very hot.
C. much noise, sounds like "ZZZZZ", comes
from outlet of capillary.
d. the temperature fell down very slowly.
If too much Gas was charged into the cycle
system, the extra gas will occupy some space
of evaporator, so that the area of heat
exchange becomes less, unit will work not well.
Phenomenon of failure:
a, higher pressure of liquid cycle system than
norm.
b, higher temperature of condenser.
c, larger electric current of compressor
d, there maybe ice on the suction tube.
e, when gas is too much, some gas liquid might
goes back into compressor, compressor will be
damaged by liquid.
The air in system will cause lower efficiency of
cooling.
Phenomenon of failure:
a, higher pressure of liquid cycle system than
norm, but the pressure is not over the limit.
Solutions
First find out the point of leaking on
tube, and then sealed it, vacuuming
it, finally recharge with Gas.
Note:
If you find oil on somewhere, it is
possible that leakage point is there.
First stop unit for several minutes,
and then open charging tube,
discharge all of gas. Change a new
filter, and then recharge gas, finally
sealed the system.
First stop unit for several minutes,
and then open charging tube,
discharge all of gas. Change a new
filter, and then recharge gas, finally
sealed the system.