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Daewoo Fra 280wp Service Manual

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    							Refrigerator
                                                                    July . 2\
    005
    4 Caution
    : In this Manual, some parts can be changed for improving, their 
      performance without notice in the parts list. So, if you need the 
      latest parts information,please refer to PPL(Parts Price List) in 
      Service Information Center 
     
    						
    							 
    2PARTS INENTIFICATION                                                             
                                           
       
    1.  Ice tray  
    2.  Wire tray in freezer  
    3.  Temperature regulator  
    4.  Storage shelves  
    5.  Crisper cover  
    6.  Crisper 
    7.  Door shelves(eggs tray inside the upper shelf)                      
    						
    							 
    3CIRCUIT DIAGRAM                                                    
                                 
     
      COOLING DIAGRAM                                    
                                       
    						
    							 
    4The guide for Disassembly Common parts of Refrigera
    tor                   
      
    The instruction of replacing Lamp.  The picture shows 
    the location of the  lamp    
     Remove the lamp 
    cover and take out 
    the lamp.      
    The instruction of replacing thermostat.
     Remove the screws 
    and take out the 
    Controller      
    Unplug the 
    connecting wire      
    Remove the 
    Temperature control 
    knob and loose the 
    the fixing nut of the 
    thermostat                
    						
    							 
    5And then ,you can 
    replace the thermostat     
    The instruction of replacing Door switch.
     You can easy to use a 
    screwdriver to take 
    down the door switch  like the right 
    picture.     
    The appearance of 
    the door switch.     
    The instruction of replacing PTC Starting relay and
     Overload protector. You can easy to use a 
    screwdriver to take  
    down Spring tap and 
    Cover.     
    Unplug the 
    connecting wire of 
    the PTC Starting 
    relay and Overload  protector.     
    The instruction of replaceing PTC Starting relay an
    d Overload protector.          
    						
    							 
    6You can easy to use a 
    screwdriver to take  
    down Spring tap and  Cover.     
    Unplug the 
    connecting wire of  the PTC Starting 
    relay and Overload  protector.     
    Then you can replace 
    the new one now     
       
    TROUBLESHOOTING                                    
                                     
    ■ Common default tests method.    
    Check the problem by observing 
    Request 
    detail a) C hecking the temperature 
    of  the  using  condition  is 
    according  with  the 
    specification or not. 
    temperature between 18-43 degrees b) Good ventilation,  with at 
    least  enough  room  for  heat 
    dissipation  around  the 
    refrigerator. 
    The appropriate space for running unit will be belo
    w: 
    Refrigerator back ≧ 10MM  
    Refrigerator two sides ≧ 20MM  
    Refrigerator top side ≧ 30MM  C) Whether the voltage  range 
    meet the requirement  of the 
    nameplate  
    On normal conditions, voltage fluctuation is allowe
    d to be between 
    10% of rated voltage, whilst if it exceeds a lot or  sometimes high 
    sometimes low, the compressor would be effected and  even burned 
    down.  
    When voltage is too high, the motor coil will be bu rnt down, whilst       
    						
    							 
    7if it is too low, the compressor would be difficult
     to  start and 
    the frequent starting will lead to burning down the  motor. Check if the refrigerator’s appearance and internal
     parts are in good condition. a)check the gasket  
    Through switching the refrigerator door to see whet
    her the gasket 
    is tight and if there’s gap between the cabinet and  seal. b)check the door switch 
    If the lamp is in good condition but it doesn’t wor
    k when opening 
    the door, we should check the door switch.  c)Check the thermostat knob   Checking the location of thermostat knob is directl
    y connected with 
    the refrigerator’s cooling.  Observe all parts of the refrigerator 
    a)Check the cooling speed 
    To  check  the  cooling  speed  of  freezing  cabinet  with
      electronic 
    thermometers so as to check if the refrigerator  is  able to lock 
    the cooling and in good cooling condition.  b)Check the outside tube 
    Checking  the  refrigerator’
    s  pipeline  system  mainly  exists  in 
    checking  whether  there  is  leakage:  for  example,as  t he  seal  of 
    Process tube, the suction pipe, the exhaust pipe we lding and the 
    connection of drying filter are prone to leak, we s hould carefully 
    examine. The checking method is to wipe the connect ion of the tube 
    with a piece of white cloth and see if there’s oil,  if does, there’s 
    leakage.   Discriminate default by temperature 
    a)To  check  the  default  b y 
    measuring  compressor’ s 
    temperature  
    When the compressor is in normal operation and it w
    ill obviously 
    hot.  b)To  check  the  default  b y 
    measuring  dry  filter’ s 
    temperature 
    When the dry filter is in normal condition and it w
    ill obviously 
    a little hot.  c)To  check  the  default  b y 
    measuring  suction  tube’ s 
    temperature
      When  the  suction  tube  is  in  normal  condition  and  an
    d  it  will 
    obviously cool.  d)To  check  the  default  b y 
    measuring discharge tube’ s 
    temperature 
    When the discharge tube is in normal condition and 
    it will obviously 
    a little warm.  e)To  check  the  default  b y 
    measuring  condenser’s  
    temperature 
    When  the  condenser  is  in  normal  operation  and  by  te
    sting  its 
    temperature, we can assure that the temperature fro m the entrance 
    to the exit is regressive (the entrance is hotter t han the exit).  
    f)To  check  the  default  b y 
    touching  evaporator’ s 
    frosting 
    When  in  normal  operation  and  we  touching  the  evapor
    ator’ s 
    frosting, it shall not easy to erase.
     Discriminate default by running noises 
    a)Checeking  the 
    compressor’s noise 
    When compressor is running,it shall go with rhythmi
    c low-frequency 
    sound;  b)Checking the refrigerator 
    flow’noise
      If  there’s  “sisi”  sound  between  capillary  and  evapo
    rator’s 
    transition, the refrigerator works normally      
    						
    							 
    8■
      The common problem judgement method 
    Problem  Cause Refrigerator can’t 
    start  1.1 Is the power cord connecting well?  
    1.2 Is the power voltage too low?  
    1.3 Is the thermostat irrational setting?  
    1.4 Is the ambient temperature too low?    
    1.5 Is the circuit on power?    
    1.6 Is there some default in compressor 
    1.7 Is the refrigeration system blocked by ice or d
    irty  ,please stop the 
    unit and  restart after 10 minutes to see if the co
    mpressor can start.  
    Weak cooling effects 
    2.1 Is there any  heat source around the refrigerat
    or?  
    2.2 Is there enough space around the refrigerator f or rejection o f heat? 
    2.3 Is the setting of the thermostat appropriate?   
    2.4 Is there too much food or overheating food in i
    t? 
    2.5 Does there open the door frequently?   
    2.6 Is the door completely closed?    
    2.7 Does the gasket destroyed or distort?   
    2.8 Does the refrgeration leak?  The unit can not stop 
    running  3.1 Is there any  heat source around the refrigerat
    or?  
    3.2 Is there  enough space around the refrigerator  for rejection of heat?  
    3.3 Is the setting of the thermostat appropriate?  
     
    3.4 Is there too much food or overheating food in i t? 
    3.5 Does there open the door frequently?   
    3.6 Is the door completely closed?  
    3.7 Does the gasket destroyed or distort?  
    3.8 Is the thermostat good operation?  
    3.9 Does the refrgeration leak?  Ice up in the freezing  
    chamber 
    4.1 Is the setting of the thermostat appropriate?  
    4.2 Is there multi-moisture food and too close to t
    he back  wall of the 
    refrigerator?   
    4.3 Is the ambient temperature too low?   
    4.4 Is the electric parts on good condition, specia
    lly  the thermostat wich 
    will cause the unit non-stopping. 
    Abnormal noise 
    5.1 Is the refrigerator stably placed?  
    5.2 Does the refrigerator bump other objects?  
    5.3 Whether the internal accessory of the refrigera
    tor  is in the right 
    place.  
    5.4 Whether the water plate of compressor is fall f
    rom the unit. 
    5.5 Does the tube of the refrigeration system bump  each other? 
    5.6 The noise sound likes Water flow inside the ref rigerator ,in fact,it 
    is normal, which is caused both when refrigerator s
    tart and shut-down ; 
    in addition, frost-dissolving  causes this sound, t
    oo, which  is a normal 
    phenomenon.  
    5.7 There will be a cracking sound in the cabinet,w
    hen the cabinet  or 
    cabinet accessory contracting or expand ing, this sound will be made, which 
    is normal.  
    						
    							 
    95.8 The motor operation sound in the compressor is 
    appears to be louder 
    at night or begin starting , which is a normal phen omenon; also the  uneven 
    placing would lead to too much running noise.  
    There is a peculiar 
    smell in the units  6.1 Is the food with special smell sealed tight?  
    6.2 Does it have long time storing food or degenera
    ted food?  
    6.3 Whether the internal cabinet needs cleaning.  the forefront or the  
    middle cabinet heats 
    7.1 As fridge Anti-condensation tube is placed here
     and caused  the above 
    phenomenon, which is normal. 
    Refrigerator’s two 
    sides or the back heat   8.1 As condensation tube is placed here and caused  the above phenomenon, 
    which is normal. 
    the cabinet surface 
    condensation  9.1 Air humidity is too large.  
    ■ The solution for the common problem.    
    1.Cooling is not enough good  
    (Many reasons might cause that cooling not enough g
    ood, as blow:) Reason  analysis  resolvent 
    1) Leakage of Gas 
    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,  there  is  no  or  less  ice  on  the  
    evaporator. 
    Solutions:  
    First  find  out  the  point  of 
    leaking on tube, and then sealed  
    it,  vacuuming  it,  finally  
    recharge with Gas.  
    Attention please on that below:  
    If you find oil on somewhere, it  
    is possible that leakage point  
    is there. 
    2)
     The  quantity  of  
    Gas is too much  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 is less ice on evaporator, but  
    there is ice on the absorbing tube.  
    e, when Gas is too much, some Gas liquid 
    might  goes  back  into  compressor,  
    compressor will be damaged by liquid. 
    Solutions:  
    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.  
    3) There is air in the  
    liquid cycle system
      The  air  in  system  will  cause  lower  
    efficiency of cooling. 
    Phenomenon of failure:  
    a, higher pressure of liquid cycle system 
    Solutions:  
    First  stop  unit  for  several 
    minutes, and then open charging  
    tube,  discharge  all  of  Gas.  
    						
    							 
    10
    than norm, but the pressure is not over the  
    limit.  
    b,  higher  temperature  of  discharging  
    tube.  
    C, much noise 
    Change  a  new  filter,  and  then  
    recharge Gas, finally sealed the  
    system. 4)Low  working  
    efficiency  of  
    compressor 
    General when a compressor works for many  
    years, some parts of compressor were wear,  
    so that compressor discharge less gas out, 
    unit does not work strongly.  
    Phenomenon of failure:  
    a, lower pressure of discharging, check  
    the pressure of system with pressure meter  
    to see if it is normal. 
    b,  higher  temperature  of  compressor  
    surface.  
    C, cut off the discharging tube, to see if  
    you can block the gas coming out of the  
    tube when compressor is working. 
    Solutions:  
    Change a new compressor. 5)
     There  is  thick  
    ice  on  the 
    evaporator  For  defrost  refrigerator  you  need  to 
    defrost ice termly  Solutions: 
    Turn off the unit and working, 
    open doors for defrosting 6) There is something  
    that  blocked  the  
    liquid cycle system
      Some time there is something blocked the  
    filter  of  liquid  cycle  system,  so  that  
    unit is not cold  
    Phenomenon of failure: 
    a, lower pressure of discharging  
    b, lower temperature of discharging. 
    Solutions: 
    Change a new filter   2.NO COOL  
    (Popular failure reasons are below): 
    Reason  analysis  resolvent 
    1) Leakage of Gas 
    Phenomenon of failure:  
    a, leaking fast  
    b, leaking slowly 
    c, no voice of liquid flowing  
    d, cut off charging tube, no gas  
    goes out.  Solution: 
    First  find  out  the point  of  leaking  on  
    tube, and then sealed it, vacuuming it,  
    finally recharge with Gas.   
    Attention please on that below:  
    If  you  find  oil  on  somewhere,  it  is 
    possible that leakage point is there.  2)There is some thing  
    that  blocked  the  
    liquid cycle system
      A,Ice blocking  
    Sometime because unknown reason  
    water  comes  into  liquid  cycle  
    system,  the  capillary  will  be  
    blocked by water after unit runs  
    for period of time. 
    Phenomenon of failure:  
    The  unit  works  well  in  the  
    inception, after period of time 
    Solution: 
    First stop unit for several minutes, and 
    then open charging tube, discharge all of  
    Gas. Blow  the  cycle  system with  gas  of  
    nitrogen, and then recharge Gas, finally  
    sealed the system.   
    						
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