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...

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...

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...

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...

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...

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...

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...

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...

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)...