Daewoo Frs 2031 Service Manual

							20
OPERATION AND FUCTIONS
CONTENTS REMARKS  
1. Fan voltage of each control mode 
 
2. Control against (under) load (Load Control) 
1) Purpose : To restore F/R-temperature which has risen by load (much foods in or 
frequent door openings) as soon as possible 
 
2) Display : SPEED lights until the mode and speed icons flicker. 
 
3) Conditions to start (from both Normal and Silence) 
  F or R door open time exceeds 30 seconds at a time   Freezer and Refrigerator 
load control starts respectively. 
  Over [F-sensor On Point + 5 degree]    F load control 
  Over [R-sensor On Point + 5 degree]    R load control 
 
4) Conditions to avoid load control 
  Initial operation (right after pow
  Just after Pre-cool, Heater defrosting, Pause, Defrosting cycle 
(After door opening, the load control enters if the condition complies with.) 
(During Sleep Mode1, load control isn t active.) 
 
5) Control Method 
5-1) Control mode by F/R-door open time (over 30 seconds) 
    F/R-fan works by 14V respectively. 
5-2) Control mode by [F-sensor On Point + 5 degree] 
  F-fan works by 14V. 
5-3) Control mode by [R-sensor On Point + 5 degree] 
  R-fan works by 14V. 
    C-fan works by 10V as normal. 
 
6) Conditions to stop 
  The mode works for 20 minutes.   
  (If another condition happens at the end of the mode, it starts again.) 
  When it reaches to [F-sensor Off point], F-fan load control mode stops. 
  When it reaches to [R-sensor Off point], R-fan load control mode stops. Control Mode  F-FAN  R-FAN  C-FAN 
Normal   12V   12V Normal   14V 14V Load Control 
Silence   12V 12V 
Silence Normal 
10V 10V Normal   10V 10V Sleep Mode2 
Load control 
12V 12V 10V 
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							21
OPERATION AND FUCTIONS
CONTENTS REMARKS  
3. Control Time Chart of Each Mode 
      1) Start & stop of load control mode (Normal Control) 
Door
F/ S
F Fan
R/ S
R Fan
Door Open30 sec. af ter OpenLoad Mode StartFrz. Load StopRez. Load Stop
On + 5deg
On + 5deg
Frz. Overl oad InputFrz. Start Condition
Frz. Stop ; after 20mi n.
20min.
20min.
Ref. Load
14V
14V 12V
12V
  
2) Start & stop of load control mode (Silence Control) 
Door
F/S
F Fan
R/S
R Fan
Door Open30sec. after openLoad Mod e St artRef .  Lo ad  StopFrz.  Loa d  St op
On + 5deg
On + 5deg
Frz.  Overload  InputFrz.  Loa d  Start
Frz.  St op  Co nd ition ;  
after 20min.
20min.
20min.
Ref .  Lo ad
12V
12V 10V
8V
   
 
  3) Start & stop of load control mode (Normal defrosting control) 
F/S
F Fan
R/S
R Fan
Defrosting Start
Condition  to start Load 
Mode , but avoided 
buring defrosting m odeRef. Loa d Stop
On + 5degN o rm a l O p e ra tio n
20m in.
Ref. Load Mode
14V 12V
8V HTR
Comp
 
 
  
 
						

							22
OPERATION AND FUCTIONS
CONTENTS REMARKS  
4. Flow Chart of Load Control Mode 
 
 
Sart
F/R door open time is over 30 sec. ?
F/S ON + 5deg?
R-sensor ON + 5deg?
Fan RPM
      F Fan : 12V
      R Fan : 12V
      C Fan : 10VFan RPM
          Normal    Overload
F Fan :  10V         12V
R Fan :  10V         12V
C Fan :  10V         12V
Overload of both
compartments
Y
N
Freezer
Compartment
Overload
Refrigerator
Compartment
Overload
Y
N
Y
N
F load control ;
over 20 min. ?
F-sensor OFF point ?
Overload mode control
Overload mode ?
Normal mode
control
N
F load control mode stop
R-sensor OFF point ?R load control mode
stop
End
Load control is avoided ?
N
Y
R load control ;
over 20 min. ?
Y
Y
Y
N
Y
N
N
Y
N
Control Mode Normal
240 minutes ?N
Silence
 
  
 
						

							23
OPERATION AND FUCTIONS
 Defrosting Cycle 
INPUT Control Object 
1.    Total comp. work time 
2.  Comp. work rate 
3.  RT temperature 
4.   Total door open time 1. Defrosting Mode 
CONTENTS REMARKS  
1. Conditions to start defrosting cycle 
  1)   Total comp. work time : 6, 8, 10 hours 
  2)   Comp. work rate (by the 2 hours) : over 65% 
  3)   Total door open time : 3 minutes   
(Any door - F or R - open time is over 3 minutes.) 
  4)   Total time of [comp. ON + comp. OFF]    : 60 hours 
  5)  Ambient temperature : over 35  
    6) Any error mode : R1, F1, D1, F3, RT/S, Door-switch 
 
  2. Conditions to start defrosting mode   
1) The mode starts in the following conditions ; 
  Any error happens when total comp. work time is 6 or 8 or 10 hours. 
  Comp. work rate by the 2 hours is over 65%. 
    Total door open time is over 3 minutes.   
(Any door - F or R - open time is over 3 minutes.) 
  Ambient temperature is over 35 . 
2) Defrosting mode starts unconditionally as long as total comp. work time is 10 hours,   
even if the above conditions( ~$) are not satisfied.   
3) Defrosting mode starts immediately as long as total time of [comp. ON + comp. OFF] is 
over 60 hours, even if the above 1) and 2) conditions are not satisfied.  
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							24
OPERATION AND FUCTIONS
CONTENTS REMARKS  
3. Flow Chart of Defrosting Start 
 
Start
Ambient temp. is over 35  ?
Comp. work time is over 10 hours ?
Total time is over 60 hours ?
Comp. work time is over 6 hours ?
Any error ?
Comp. work rate is over 65 % ?
EndDefrosting mode starts.
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
NoComp. work time is over 2 hours ?
Total door open time is over 3
minutes ?
Yes
Yes
No
No
Comp. work time is over 8 hours ?
No
No
 
 
  
 
						

							25
OPERATION AND FUCTIONS
 Defrosting Mode 
INPUT Control Object 
1. Defrosting Cycle 1. COMP 
2. F-FAN 
3. R-FAN 
4. HEATER 
CONTENTS REMARKS  
1. Defrosting Mode 
 
1) Time ; 50 minutes 
2) Comp. / F-fan : ON 
R-fan : Control 
Heater : OFF 
3) If F-sensor≤- 27 , PRE-COOL becomes OFF. 
 
                          1) If D-sensor ≥10 , Heater becomes OFF. 
2) In case of Heater return by time limit of 40 or 80 min 
(F3-Error) 
3) Heater is ON for 30 minutes (time limit) in case of D-
sensor error. 
4) Time limit 
  30 seconds : Heater is ON regardless of D-sensor 
temperature right after defrosting start. 
  30 minutes : in case of D1-Error 
  80 minutes : in normal control state 
 
1) Time : 7 minutes 
Comp., F-fan, R-fan, Heater : OFF 
 
 
1) Time : 5 minutes 
Comp. : ON 
F/R-fan, Heater : OFF 
 
  Output control and time limit of each defrosting mode 
 
 PRE-COOL Heater Defrosting Pause Fan Delay COMP ON  OFF  OFF  ON F-FAN ON  OFF  OFF  OFF R-FAN Co ntrol  OFF  OFF  OFF HEATER OFF  ON  OFF  OFF 
Time Limit  50 min.  80 min. 
 30 min. 
(in case of D1-Error) 7 min.  5 min.   C-fan and comp. 
are linked. 
 
  
Pre-Cool 
Heater 
Defrosting 
Pause 
Fan Delay 
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							26
OPERATION AND FUCTIONS
Error Display (LCD Display of F-PCB) 
 
 
E1 I sensor; disconnection, short 
EF FLOW sensor; disconnection, short  
Et Level sensor sw error 
E9 Water supply Error 
EA Continuously Ice drop 3times at Et. 
Eu Fully Ice sensor sw error 
INPUT Control Object 
1. Temperature Control Buttons  CUSTOM LCD 
CONTENTS REMARKS 
 
1. How to start 1) Set    LOCK ON first. 
2) Push Refrigerator Set button 5 times while pushing Freezer Set button. 
 
2. Display    Error code is displayed on Freezer temperature display part. 
 
3. How to stop  1)    Push LOCK button 3 times while pushing REF SET. button. 
2)    It stops automatically 4 minutes after the start. 
 
4. All the error Ccdes are reset if they turn to be normal. 
  
5. Error Code 
 
   
 
ERROR CODE CONTENTS 
F1  F-sensor ; disconnection, short(pull-down) 
r1  R-sensor ; disconnection, short(pull-down)   
rt  RT-sensor ; disconnection, short(pull-down) 
d1  D-sensor ;  disconnection, short(pull-down) 
dr  R-Door Switch ; defective 
dF  F-Door Switch ; defective 
dH  Homebar (Refreshment Center) Door Switch ; defective 
C1  Cycle ; abnormal or defective. 
F3  Return after defrosting ; abnormal or defective 
d2  Forced defrosting mode for A/S 
 
 
 
 
 
 
 
 
 
 
						

							27
OPERATION AND FUCTIONS
CONTENTS REMARKS 
 
6.    Control Way of Errors (if any) 
 
  1) F1 ERROR 
    Cause : F-sensor disconnection / short (pull-down) 
   Control : Comp. / F-fan   ON for 25min., OFF for 25min.           
    if F-sensor is normal, the error is terminated automatically. 
 
  2) r1 ERROR 
    Cause : R-sensor disconnection / short (pull-down) 
  Control : Condition of ambient temperature 
RT/S In ERROR 
~13  14 ~19  20 ~29  29 ~    
Work rate 
ON/OFF 8 / 12  7 / 13  8 / 12  8 / 12  9 / 11 
    If R-sensor is normal, the error is terminated automatically. 
  
3) rt ERROR 
  Cause : RT-sensor disconnection / short (pull-down) 
  Control : Normal operation, deletion of control condition by RT-sensor 
  If RT-sensor is normal, the error is terminated automatically. 
4) d1 ERROR 
    Cause : D-sensor disconnection / short (pull-down)   
    Control : Time limit (30min.) of defrosting-return 
    If D-sensor is normal, the error is terminated automatically. 
  
5) Door ERROR(dF,dR,dH on display) 
    Cause : in case it senses that door is open for more than 1   
  Control : Deletion of function related door switch sensing 
    If door switch (open & close) is sensed, the error is terminated automatically. 
    After displaying on LCD the mode is terminated. 
  
6) C1 ERROR 
Cause : in case comp. works for over 3 hours when D-sensor temp. is over -5  
    Control : Normal operation 
    When D-sensor temp. is below -5   in comp. OFF, it is terminated. 
  
7) F3 ERROR 
    Cause : in case defrosting-return is done by time limit of 80min. 
    Control : Deletion of Pre-cool mode in defrosting mode 
    If defrosting-return is done by D-sensor, it is terminated. 
 
8) d2 MODE (A/S forced defrosting mode) 
  Set LOCK ON first, then push REFRIGERATOR SET. button 5 times while pushing 
FREEZER SET. button simultaneously. 
  Control : A/S forced defrosting control (Pre-cool is deleted.) 
  If D-sensor temp. is over 10 , the mode is terminated    automatically.  
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							28
OPERATION AND FUCTIONS
          
 
9) EI ERROR 
        Cause : I-SENSOR disconnection / short (pull-down) 
        Control : After water suppy, Ice drop every 4.8hour. 
        Termination : When I-SENSOR is normal. 
 
10) Ft ERROR 
Cause : When Level SW is ERROR 
Control : Time control (Skip water supply mode) 
Termination : Normal 
   
11) EF Error 
        Cause : When Flow-sensor is ERROR(There is no Pulse during some time.) 
                 When water supply valve is ON                                   , Pulse input is below 10 during 1s. 
        Control : Time control(By Vector time recorded EEPROM.) 
                (Generally, Water is supplied about 5.5s.) 
Termination : Exchang Flow-Sensor. 
 
12) Eg Error 
        Cause : I-Sensor temp(5M after Water supply) dosen t get high. 
        Control : Normal control 
     Termination : Normal 
   
13) Dispenser S/W Error 
        Cause : When it senses 1M continuously.   
        Control : Stop Dispenser & Crusher function. 
        Display : Relative ICON BOX is OFF. 
     Termination : Normal 
 
14) Malfunction of Ice Drop Motor   
        Cause : Malfunction of Ice Drop Motor. 
               [Check the Motor by pushing Test S/W.] 
    Termination : Exchange Motor   
 
15) Eu Error 
Cause : Fully  TM position is Error 
  Control : When dropping the Ice, the motor just rotates 90 degree. 
  Termination : Fully sensor is normal. 
 
16) EA Error 
        Cause : When sensing Ice dropping 3 times with level sensor SW Error. 
        Control : Pause Ice Maker. 
        Termination : With level sensor SW is normal,   
                  Reset the Power or Push TEST S/W. 
 
      * When all ERROR CODE is normal, the Refrigerator reset. 
    
 
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							29
OPERATION AND FUCTIONS
 Forced Defrosting 
INPUT Control Object 
1. FREEZER SET. Button 
2. REFRIGERATOR SET. button 
3. LOCK button Defrosting Mode 
CONTENTS REMARKS 
1.  How to start 
  Set LOCK ON first, then push REFRIGERAOTR SET. button 5 times 
while pushing FREEZER SET. button simultaneously. 
 
2.  How to proceed 
    1) Delete Pre-cool mode. (Others are same as normal defrosting.) 
    2) Heater is ON regardless of D-sensor temp. at first 30 seconds. 
      ( Check of defrosting current)  
 
6-11. Initial Defrosting 
INPUT Control Object 
D-sensor 
Initial or first power input (power plugin) Defrosting Mode 
CONTENTS REMARKS 
If D-sensor temp. ≤  3.5  , defrosting mode starts from Pre-cool at first 
power input. Comp. is delayed for 6 min. 
at the initial defrosting. 
 
6-12. Buzzer or Alarm 
INPUT Control Object 
F-PCB buttons 
Door Switch 
Initial Power Input BUZZER 
CONTENTS REMARKS 
1.    Buzzer sounds if any button of F-PCB is pushed. 
2.    Buzzer sounds 3 times 3 minutes after initial power input. 
3.    Buzzer sounds for 1 second in case of A/S forced defrosting, short (pull-
down) operation, explanation mode.   
4.    If door is open, buzzer sounds continually 3 times for 5 seconds. 
    (Door open alarm)  
 
  LCD Background Light 
INPUT Control Object 
F-PCB buttons 
Door Switch 
Initial Power Input LCD BACK LIGHT 
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