Daewoo Frs 20 Service Manual

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ITEMREMARKNO CHECK POINT
Compensation of
Weak Refrigeration
→Making R-temp
cooler 1
* Used when making R-temp. down
to compensate for weak refrigeration
without changing FCP temp. setting.
▷Cutting of J18 ; down by 1.5 ℃
▷Cutting of J18, J19 ; down by 3℃
Relay Power
Controller 2 * To check normal voltage of each electrical devices
to & from Mi-com.
▷Check input & output voltage of MICOM and IC7, 8.
Fan Power
Controller 3
* To check input & output voltage of Fan
Electric Current Fuse
4 * To check when each device does not work (250V,3.15A)
Time Shortening
Switch 5 * To shorten time in PCB checkup
(Pressing 1 time is regarded as 1 minute has passed.)
Regurator IC(5V)
6 * To check voltage of MICOM and IC
Voltage check of IC#6 (Input :12V,Output : 5V)
1
2
3
4
5
6
J18,19
- Dispenser Model
▷#2 : Input
▷#5 : Output
FRC
 
						

							51
NODISASSEMBLING PROCEDURE NO DISASSEMBLING PROCEDURE
16
38▷Pull forward ice maker.▷Unscrew (3 points) Plate Gear Fixture.
▷Unscrew Fixture of Frame Ice Maker.▷Check if ice dropping motor is normal (OK).
8-6. Ice Maker
1) Disassembling Procedure
27▷Remove 2 screws on top front of ice maker.
▷Remove full ice sensing switch and level switch.
49
▷Separate Ice Maker Assembly from
Frame Ice Maker.▷Remove 2 pin housing from Plate Gear Fixture.
510
▷Separate Cover I/M (A) from Cover I/M (B)
with a (-) screw driver.▷Remove I-sensor (ice sensor) from
Case Icing As.
* Follow the reverse order when assembling.
 
						

							52
PARTS HOW TO CHECK CRITERION
Ice Dropping Motor
2) How to Check Ice Maker
▷Check resistance value of 2 wires
with a Multi Tester.
▷GOOD : RS-360RH-14250
:  6 ~ 14Ω
▷DEFECTIVE :
Change the motor.
I-Sensor
(Ice Sensor)
▷Check resistance value of 2 wires
with a Multi Tester.▷GOOD : 4.4 ~ 50kΩ
(It depends on surround temp.)
▷DEFECTIVE :
Change the sensor.
Full Ice
Sensing Switch
▷Check resistance value of 2 terminals
with a Multi Tester.▷GOOD : 
▷DEFECTIVE :
Change the switch.
Level Switch
▷Check resistance value of 2 terminals
with a Multi Tester.▷GOOD : 
▷DEFECTIVE :
Change the switch. Tact Switch
(Blue Circle) Terminals
(Red circle)Tester Result
(Resistance Mode)
ON (Close) Connected Some Value
OFF (Open) Disconnected No value (0)
Tact Switch
(Blue Circle) Terminals
(Red circle)Tester Result
(Resistance Mode)
ON (Close) Connected Some Value
OFF (Open) Disconnected No value (0)
 
						

							53
1) Insert a flat tip driver into the left down groove of panel frame and snap it out smoothly.
2) Separate 2 housings of 10P / 7P from Front PCB. (Do not hold only wires to pull out.)
3) Unscrew (7 points) to remove Front PCB.
* Follow the reverse order when assembling.
※How to replace Front PCB
Change the Main Fuse
(AC250V 15A)
(In the left side of
machine compartment)
Start
Power cord or Fuse 
is disconnected ?
1’st power of SMPS
is on?
Main PCB Fuse is 
disconnected?
Voltage
(DC12V/14.5V/5V) on 
Main PCB is OK?
Wire connection 
of F-PCB is OK?
Check power Cord connection 
from machine compartment and 
to CN1 of M-PCB.
Change F-PCB AS.
Change Main PCB
Change the Fuse
(AC250V 3.15A)
(on the Main PCB)
Y
N N
Y
NY
YN
Y
N
Checkup and connect
F-PCB wires.
9-1. Faulty Start (F/R lights OFF , F-PCB Power OFF)
※Refer to the 5-1.
(Power circuit diagram) 
9. TROUBLE DIAGNOSIS 
 
						

							54
Refer to error display
in operation and function
Start
Change the 
Comp.
Change Fuse. Temp
Y
N N
Y
N
Y
YNY
N
Change OLP/PTC
Change F/C-Motor
Change M-PCB
Check lead wire
Change the 
Defrost Heater
Check ice formation on Eva. 
And if refrigerant leak
is found, repair it.
N N
YY
YN
N
Defrost Heater : 192W (252 Ω)
※Left-lower side of Evaporator
(4thpipe from buttom) OLP/PTC
is OK? Does Comp.
work? Any Error code 
on F-PCB?
F/C-Motor
works OK?F/C-Motor
is OK?
Wiring connection
Is OK?
Temp. Fuse
Is OK?
Defrost Heater
Is Ok?
Ice formation on Eva.
Is OK?
Y
9-2-1. Freezing failure . (Foods are not frozen / cold.)
9-2. Freezer Compartment
※Refer to the 4-10.
(Error Display)
 
						

							55
1) Remove foods.
2) Remove Ice Bucket,
shelves and cases in
Freezer compartment. (1)
Removing and replacing Freezer parts
* Remove 2 screws
of Ice Maker.
* Remove the Housing
of Ice Maker AS.
(Right side)
* Remove 4 screws
of Geared Motor.
* Remove the Housing
of Geared Motor AS.
(Center) (2)
(3)(4)
(5)
 
						

							56
* Remove light cover screws.
* Pull down smoothly the
bottom of light cover to
remove.
* Remove the screw of
bracket F-Lamp.
* Remove the left housing.
* Hold the end of F-Fan cover
and pull forward slowly.* Remove the screw cap on
the F-Louver A with a flat
tip driver.
Removing and replacing Freezer parts
* Pull out smoothly the
bracket F-Lamp AS.
to remove.
* Remove 3 screws of
F-Louver A.
* Hold the end of F-Louver A
and pull forward slowly.
* Remove the housing.
* Remove the screw of
F-Return cover
and pull out cover.
* Hold the end of F-Louver B
and pull forward slowly.
(6)
(7)
(8)
(9)
(10)
(11)(12)
(13)
(14)
(15)
(16)
(17
 
						

							57
Removing and replacing Freezer parts
F-Louver B Heater Housing
D-Sensor Housing
1st : F-Louver B Heater Housing
2nd : None.
3rd : Defrost Heater Housing.
Temp. Fuse
Defrost Heater
D-Sensor Defrost Heater
Temp. Fuse Housing
 
						

							58
Reassemble the door.
Start
Explain not to open
doors too frequently.
Y
N N
YRemove the gap.
Wipe out dews on the
louver surface and run
the refrigerator again.
Change the louver assembly.
Y
N
Y
Y
Y N
N
Make enough distance 
between heat appliances
and refrigerator.
Y
N
N
9-2-2. Ice Formation on F-Louver
Dews are formed on the
gasket surface inside F
compartment ?
Gasket has a gap
between cabinet ?
Door is hanged
down ?
Door is open and closed
too frequently ?
Heat appliances are too
close to the refrigerator ?
Watery or hot foods are
stored in refrigerator
compartment ?
Louver heater is
disconnected ?
 
						

							59
Change the light bulb.
Start
Repair the F-door switch.
Check the F door switch 
connection and F-light socket.
Y
N N
Y
Change of F LightsChange of F Door Switch
* Remove 2 screws 
of light cover.
* Hold the bottom of light
cover and pull forward
to remove.
* Change the light bulb.
(AC240V 25W)*  Insert a flat tip screw
driver Into a gap of door
switch to pull forward.
* Disconnect the housing
and change the switch
for a new one.①
②
③①
②
9-2-3. Disconnection / breaking of Freezer Lights Wires
Freezer light filament is
disconnected or breaking ?
Connection of F door
switch is OK ?
※Be careful when changing
the switch. F and R door
switch are different in type
and shape.
※Follow the reverse order
of disassembling after
changing the switch.
※Follow the reverse order
of disassembling after
changing the light.