Daewoo Fra 280wp Service Manual

							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.