Daewoo Frs U20 Service Manual

60
9-3. Refrigerator Compartment
Solve error code
problem, if any.
Start
Y
N
N
Y
NNY
Y
Change 
the R-Motor.
Change the Main PCB.
Check the wirings.
Explain not to place foods close to 
R-sensor or cold air spout.
Explain not to open doors 
unnecessarily or frequently.
N
Y
NY
Y
Refer to “Freezing
does not work.”
N
Reassemble doors.
Repair to eliminate
the gap of gasket.Y
N
Y
N
Change the R-Sensor
and check connector.
Y
YN
N
9-3-1. Refrigeration failure (Foods does not get cool or cold soon.)
Any error...

61
* Remove screws
of light cover.
* Hold the bottom
of cover and pull
forward to remove.
①
②
③
* Change the light
bulbs.
(AC240V 25W)
Change the light bulb.
Start
Repair the R-door switch.
Check the R-door switch 
connection and R-light socket.
Y
N N
Y Freezer light filament is
disconnected or breaking ?
Connection of R door
switch is OK ? 9-3-2. Disconnection / Breaking of Refrigerator Lights Wires
Change of R LightsChange of F Door Switch
※Follow the reverse order
of disassembling after
changing the...

62
Reassemble the doors.
Start
Explain not to open
doors unnecessarily.
Y
YRepair to eliminate the gap.
Make enough distance  between
the appliances and refrigerator.
Advise to cool down foods, wrap
or cover foods with much water
before storing in the compartment.
Repair and change R-motor.
Y
N
Y
Y
Y
N N
N
N
Explain not to open doors
too long.
Y
N
N
N
Y
9-3-3. Dews on Refrigerator Compartment
Dews are formed
on the gasket inside
R-compartment?Gasket has
Any gap ?
Door is
hanged down ?
Door is open too...

63
Start
Explain the temperature modes.
Advise to set the temp. to
“Middle” or “LOW” mode.
N
Repair and/or Change
the R-check valve.
Change the R-sensor.
Y
N N
Y
Check the R-sensor connection.
(Check the connector to Main PCB.)
N
Y
※Refer to “Repair /Change
of Check Valve”.
Y 9-3-4. Excessive Refrigeration of Vegetable Case
Refrigerator temp.
mode is “HIGH” ?
R-check valve
Works OK ?
Is there any
R-sensor error code ?R-sensor is OK ?
 

64
* Hold the bottom and
right of damper to pull
down to remove.
* Lift up a piece of Check Valve
Flap and insert a finger to the
valve frame to hold out.⑤
⑦⑥
⑧
Removing of Check Valve
* Remove screws
of light cover.
* Hold the bottom
of cover and pull
forward to remove.
①
②
③
④
* Disconnect light
housing.
* Remove screws with a
(+)screw driver.
 

65
Start
Level the refrigerator by
adjusting wheels.
☞Refer to User’s Guide
and SVC Manual.YN
Set it right.
Y
N
Change the Rubber absorber.
Y
N
Attach a restrainer on the comp. 
head to reduce vibration and
high frequency noise.YN
Change the compressor.
Remarks
●Compressor sound is somewhat normal because it works like a heart to circulate the refrigerant in
the pipes during the refrigerator operation.
●Rattling or metallic touch sound of motor, piston of comp. can be heard when it starts or stops.
9-4....

66
Start
Attach an absorber gum
on the capillary tube. NY
Apply a gum on the
accumulator. YN
Apply a gum on the
accumulator. Y
N
Fasten the evaporator in F-
compartment tightly against
touching (liner) surfaces. NY
Explain refrigerator work
mechanism and sound to the
users or customers.
Remarks
●Water flowing sound, hiss or sizzling sound can make while refrigerant in the pipes is changing from
liquid to gas state when comp. starts or stops.
It is normal to the refrigerator. 9-4-2. Refrigerant Flow...

67
Troubleshooting of Evaporator Sound
1. Hiss Sound from Capillary Tube
1) “I” tube is used to connect the
capillary tube and evaporator.
(2 welding points : ①, ②)
2. Sizzling Sound from Accumulator
3. Shaking or trembling Sound of Evaporator
12
2) When such a sound is made,
attach a absorber on the tube
including 2 welding points.
Attach a absorber on point ③(accumulator).
1) Check whether evaporator is fastened tight
with the fasteners of ①, ②.
2) Insert a soft spacer (EPS) between left and right...

68
Remarks
●The fan is sending out cold air to circulate it through the compartments.
When the air is touching the surface of louver or liner wall, such sound can make.
Start
Change the fan. NY
Set it right not to touch. YN
Set it right not to move. YN
Change the motor
assembly. NY
Explain to the customers
how fan is working to
circulate cold air in the
compartments. 9-4-3. Fan Noise
Fan is damaged
or transformed ?
Fan is touching
the surround ?
Fan-motor assembly
is moving or shaking ?
Motor has its own...

69
2) Check if fan motor and fan are hanged down.
Fan working sound can be louder if they are
not set right.
2. Any Touch Sound from Fan
Troubleshooting of Fan Noise
1. Fixing or Fastening of Fan Motor
1) Check if fan motor frame of the assembly is
fastened tightly with screws to the liner wall.
Unless it is tight, vibration of shaking can make.
1) Check if sealing sponge on the insulator
touches the fan.
If so, set it again not to touch it.
2) If any damage on the insulator around the fan
rotation is...