Daewoo Rf 420 Service Manual

							1. Front PCB
DISASSEMBLY
2. Door Switch 
 2-1. RF-420N.. Models
No No
 Inuput a cutter sleeve between Window FCP and Panel
F control. ( Be careful not to scratch the surface. ) Unscrew Panel F Control.
Lift up the Window FCP.
( Input cutterr deeply to lift up easily.) Pull up the Panel and disconnect the wire connector. Procedure Procedure
3
4 2 1
No No
Inuput a thin driver in the right part as above picture. Move switch to left side.
And lift up to remove. Disconnect the wire housing.Procedure Procedure
12
20
 
						

							 2-2. RN-420N.. Models
3. Multi-Duct As ( In Freshfood Compartment )
DISASSEMBLY
No No
Remove top cover hinge screw with (+) driver. Remove the Door Switch from the cover hinge.
Separate the Cover hinge by using driver. Disconnect door switch connector.
Be careful not to scratch the cabniet surface.Procedure Procedure
4 23 1
No No
1
Remove screw cap with flat driver
Unscrew 2 points Disconnect the Lamp & Sensor wire housing.Procedure
3
2Procedure
21
 
						

							4. Freezer Louver As
DISASSEMBLY
No No
Unscrew the fixing screw to remove the Louver F As Remove 3 screws in order to disassemble Louver F As.
Remove the Louver F As pulling the top side. When disassembling check the Knob position.
 
Disconnect Fan motor wire housing. Default position is M 36Procedure Procedure
4
5 2 1
L  M  H
22
 
						

							 
 Below process is for RN-420N (Refrigerant type : R-600a) models.
 Some parts are differ to RF-420N models. ( Hinge Cover, Door Switch, Wire Harness and Button Door Switch. )
 When you change door opening direction ( RF-420N models ), please refer page 20 (Door switch Disassemlby) and below.
How to change Door opening Dirction (Reversable)
No No
After hiding door wire harness, remove the button Door
Remove top cover hinge screw with (+) driver. Switch and Cover Bushing.
After unscrewing the  Cover Hinge Harness *T *L, 
Separate the Cover hinge by using driver. disclose the door wire harness.
Reassemble the cover and button door switch.
And also assemble the door stopper to opposite side.
Remove the Door Switch from the cover hinge. (Which is located the Door under Cap. )
Remove the Middle Hinge. 
Disconnect all wire connector and hinge. Assemble Cover Bushing & Stopper to the opposite.
a. Change the location 
(screw & division hinge cap
)
b. Change the unnder hinge
Unscrew the Cover Hinge Harness *T *R  location to the opposite.
and hide the door wire harness. 510 38
49Procedure Procedure
7 26 1Refrigerator Door Cap
Hidden
Wire
Button
Cover Bushing
Stopper
Freezer Door
23
 
						

							How to change Door opening Dirction (Reversable)
No No
Screw the middle hinge to fix the Freezer Door. Connect the wire harness to door swtich.
( Washer should be up. ) ( Be careful the dircetion. )
Also assemble wire cover on the top plate. ( On the rightAssemble Door and hing cover.
Change the plate position and separate door switch.Procedure Procedure
15 1214 11
13
24
 
						

							 1. Safety Warning ( R-600a Refrigerant Models Only, RN-420N.. )
This appliance contains a certain amount of isobutane refrigerant (R600a) a natural gas with high
environmental compatibility that is, however, also combustible.
When transporting and installing the appliance, care should be taken to ensure that no parts of the 
refrigerating circuit are damaged.
Refrigerant squirting out of the pipes could ignite or cause an eye injury. If a leak is detected, avoid
any naked flames or potential sources of ignition and air the room in which appliance is standing for
several minutes.
 - In order to avoid the creation of a flammable gas-air mixture if a leak in the refrigerating circuit occurs, the size of the room
   in which the appiance may be sited depends on the amount of refrigerant used. The room must be 1m3 in size for every 8g
   of R600a refrigerant inside the appliance. The amount of refrigerant is shown on the identification plate inside the appliance.
 - Never start up an appliance showing any sings of damage. If in doubt, consult your dealer.
 2. Tools
How To Charge R-600a Refrigerant
25
 
						

							 3. Process Summary
 4. In Detail Precess
How To Charge R-600a Refrigerant
- Connect the dis-
  charging hose to
  the outdoors.
- Time : 7 min.
1st Step.
R-600a ref.
discharging2nd Step.
Removing
the remaning refrigerant3th Step.
Exchanging comp.
& dryer / pipe welding
4th Step.
Welding
coupling pipe5th Step.
Vacuum6th Step.
Charge R-600a
- For removing of
  remaning refrigerant.,
  connect the discharging hose to
  the vacuum pump
-Time : 10min- Exchange Comp. and Dryer
- Welding the Pipe
- Copper-Copper : 5% rod
- Copper-Steel : 30% rod
- Check the vacuum
  with (mani-polder)
  gauge
- Time : 60~80min- Charging the ref.
   on POWER ON
- Time : 10min   Coupling cap and
   gas charging cap
   should be
   seperated before
   welding.
NO.
SVC process Image Details
1. Connect the dis charging hos e to 
   the pinc h-plier
2. The outlet of dis c harging hos e s hould
   be plac ed to the outdoor(window)
1. Fix the pinc h-plier to the c om pres s or
   c harging pipe.
2. Pinc h-plier s hould not be m oving freely. 
※ If that is m oving freely, it would c aus e
    fire/explos ion as  leakage gas  in the room .
 1. Dis charge the R-600a ref. to outdoor.
   [Befor c onnec ting the vac uum  pum p]
※ It s hould have enough tim e  m ore than
   7   minutes to  discharge. 3Discharging
the  R-600a re f. 1
2Connecting
the
pinch -plier
&
 discharging
hose
Fix ing
the  pinch-plier
&
charging pipe
OUT DOOR
26
 
						

							How To Charge R-600a Refrigerant
NO.
SVC process Image Details
1. Change the c om p. & dryer.
※ You s hould c hec k the com p. s pec .
    and as s em ble c orrec tly.
1. W eld the eac h pipe.
  
※ 
O Copper-Copper welding - 5% rod
      
△
 Copper-Steel welding - 35% rod
1. Dec ap the c ouplig pipe c ap and
    disassemble the vlave assy.
 
※ If you dont dis ass em ble, the c oupling
      rubber would be m elted. 8Disassembly
of charging v alv e
( Co u pling  pipe ) 7
Welding 6Ex changing comp
&  d r y e r
Val v e  As s ' y Val v e  As s ' y
1. And then, c onnec t the vac uum  pum p
    to the outlet of disc harging hos e
1. Dis as s em be the each pipe (Del-pipe,
    Suc -pipe, Capi-pipe, Dryer & Hot-pipe)
※V ac um pump s hould be plac ed at
    t he out door where is  able t o c lear air eas ily .
※ It  s hould have enough t ime
    more t han 10 minutes  t o dis c harge.
※ Caution ; A part is  eas ily dam aged
    by flam e s o that dis as s em ly should
    be done c arefully. 4Remov ing the
remaining ref.
5Remov ing the
pinch-plier  &  pipe
30% rod
27
 
						

							How To Charge R-600a Refrigerant
NO.
SVC process Image Details
1. Reas s em ble the valve as s y with 
    c oupling pipe to c loc kwis e.
 2. Connect the blue hos e of the guage
    to the c oupling pipe and the yellow hose
     to the vacuum pump.
3. Open the blue guage lever 
    and start the vac uum  pum p
 1. Be vac uum ed the c yc le with pum p.
 
※  Tim e :  60~80m in
   =>  If the vacuum time is less than 60min,
        ref. COP & air c oolong would be weak.
1.  Chec k the guage : -76
㎝Hg
 
※ If the c yc le is  not vac uum ed,
      it would be leak.
1. Chec k the am ounts  of R-600a c an
    with s c ale and disc harge the s urplus  ref.
 
※  Tip of adjus ting.
   - Can total weight :160g(Can 75g+Ref. 85g)
   - Adapter  : 145g
   =>  Total : 305g
   - The am ounts of c harging : 79g
   => Dis c harging : 6g => Total :  299g  
※ Dis charging is  s urely done at the outdoor
     where is  able to c lear air.
13Adjusting
 the  amounts of
refrigerants
(R-600a can) 11
Vacuum
12
Check Valv e  reass' y
&
guage connecting 10
1. W eld after ins erting the c oupling pipe
    to the compressor.
 
※ Us e the wet cloth for preventing the
   other part of m ac hinery-room  from  dam age. 9Coupling pipe
welding
28
 
						

							How To Charge R-600a Refrigerant
NO.
SVC process Image Details
1. Conec t c an adapter to the c oupling pipe.
2. Charge the ref. with open lever s lowly.
※ Refrigerant s hould never leak in the room .
1. On the power of refrigerator and then
   start  to charge the ref. (10min)
 
※  Charge the ref. until going out the water
     vapour c on
densing on the c an outlet.
1. Chec k the leakage.
 
※ You m us t rework from  Step.1
   when the leakage is  detec ted.
1. Clean and c lear around the m ac hinery 
    room  when the s ervic e is  finis hed.
2. Ass em ble the m ac hinery room  cover. 17
Finish 14Connecting of
coupling pipe
&
adapta
15
Charging
16
L eakage  Test
29