Daewoo DWC-121R User manual

40
Service Manual
Window Type
Room Air Conditioner
Model: DWC-121R / (DWC-124R)
DWA-122R / (DWA-124R)
DWB-122R / (DWB-124R)
DWA-121R / DWB-121R
DWB-123R / DWA-150R
DWA-151R / (DWA-152R)
DAEWOO ELECTRONICS CO., LTD.
✔ 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 (http://svc.dwe.co.kr).
S/M No. :DWC121R040

CONTENTS
1. Specifications................................................................................................2
2. Operation.....................................................................................................3
3. Wiring Diagram..........................................................................................12
4. Refrigerant Cycle.........................................................................................13
5. Control Block Diagram.................................................................................14
6. Circuit Diagram..........................................................................................15
7. Trouble Shooting..........................................................................................18
8. Key Components of Electronic Circuit............................................................28
9. Disassembly Instructions ...............................................................................30
10. Exploded Diagram and Parts List...................................................................33
Contents
1

2
1. SPECIFICATIONS
ITEM MODEL
Function
Power source AC 115V, 60Hz
Cooling Capacity
Btu/h 12,100 12,000 12,000 11,700 12,000 11,500 14,018 14,000
Kcal/h 3,050 3,024 3,024 2,950 3,024 2,898 3,533 3,528
Btu/wh 10.1 10.2 10.1 9.9 10.0 10.0 9.4 9.8
Kcal/wh 2.55 2.57 2.55 2.49 2.52 2.52 2.38 2.47
Dehumidification Pts/h 3.40 3.61 3.14 3.30 2.66 2.71 4.04 3.93
g/h 1,545 1,640 1,427 1,500 1,209 1,836 1,786 1,232
Electrical Data
Power Input (W) 1,200 1,175 1,184 1,180 1,150 1,150 1,487 1,420
Running Current (A) 11.5 5.5 5.5 5.2 5.4 5.4 6.7 6.5
Type Rotary
Compressor Model QK164CN12 QK164KN12 RBA115A001 QK196PN13A RBB110A011 RBF110A011 QJ196KC23B RCA135A001
Capacitor 40µF/370VAC
Model
Motor Capacitor 12µF/370VAC
Indoor-Fan Blower-Fan
Outdoor-Fan Propeller-Fan
Refrigerant(R-22) Control Capillary
Charge Q’ty (g) 680 740 790 730 690 760 790 780
Dimensions Unit(W x H x D)
Packing(W x H x D)
Weight Net Weight 88 lbs (38.8Kg)
Gross Weight 89 lbs (40.3 Kg)
30µF/400VAC
A2925CA070/OBM-2501P2
5µF/400VAC
25µF/370VAC
AM12DWD11-1/OBM-2503U1
4µF/370VAC
90.2 lbs (39.8Kg)
97.5 lbs (43Kg)
92 lbs (42Kg)
96 lbs (43.5Kg)
Energy Efficiency
Ratio
AC 208~230V, 60Hz AC 220~240V, 50Hz
Cooling only
AC 220~230V, 50Hz AC 240V, 50Hz
25µF/370VAC
AM12DWD12-1/OBM-2502U1
5µF/370VAC
AM12DWD10-1/
OBM-2501K
88 lbs (38.8Kg)
89 lbs (40.3 Kg)
23.6(W) x 14.9(H) x 21.0(D) inch (600(W ) x 380(H) x 535(D) mm)
26.1(W) x 18.1(H) x 22.6(D) inch (663(W ) x 460(H) x 573(D) mm)
AC 208~230V, 60Hz
DWC-121R
(DWC-124R) DWA-121R DWA-122R (DWA-124R) DWB-121R DWB-122R (DWB-124R) DWB-123R DWA-150R DWA-151R (DWA-152R)
• DWA-124R, DWB-124R, DWC-124R, DWA-152R;
Except detachable Double Grille Front, the general spec of this model is same to one of the old models.

3
1
PARTS OF NAME AND FUNCTION
2. OPERATION
● DW*-121R/DW*-122R/DWB-123R/DWA-150R/DWA-151R (NOTE:* ➔ A or B or C)
NO PART NAME
1 AIR FILTER
2 GRILLE FRONT
3 CABINET
4 BLADE VERTICAL
5 PANEL CONTROL
6 REMOTE CONTROLLER
NO PART NAME
7 BLADE HORIZENTAL
8 AIR VENT
9 FRAME GUIDE TOP
10 FRAME WINDOW KIT
11 SHUTTER WINDOW
6
9
3
2
0
7
q
4
8
5
3
2
7
4
8
5
1
1
RoomAir-conditioner
RoomAir-conditioner

4
NO PART NAME
1 AIR FILTER
2 GRILLE
3 CABINET
4 BLADE VERTICAL
5 PANEL CONTROL
6 REMOTE CONTROLLER
NO PART NAME
7 BLADE HORIZENTAL
8 AIR VENT
9 FRAME GRILLE
10 FRAME GUIDE TOP
11 FRAME WINDOW KIT
12 SHUTTER WINDOW
6
4
0
q
7
w
8
59
5
3
2
1
3
4
8
2
7
1
9
RoomAir-conditioner
RoomAir-conditioner
● DW*-124R/DWA-152R (NOTE:* ➔ A or B or C)

5
2
REMOTE CONTROLLER
REMOCON SIGNAL TRANSMITTER
TIMER/CANCEL
• Everytime you push this button,
timer is set as follow.
(1Hr→2Hr→3Hr→4Hr→5Hr→6Hr→8
Hr→10Hr→12Hr→16Hr→20Hr→24Hr
→CANCEL).
After the unit is timed, if this button is
pushed, timer is canceled.
SLEEP
• SLEEP mode is selected as
follow. (L1→L2→Cancel)
MODE
• Everytime you push this button,
it is selected as follow.
(COOLING→TURBO→FAN→
COOLING)
AUTO SWING
• Everytime you push this button,
the auto swing mode is toggled.
TEMPERATURE
• It is the button to set the room in
the desired room temp.
The temp can be set within a
range from 16°C (60°F) to 32°C
(90°F) by 1°C (1°F)
POWER ON/OFF
• To turn the unit ON, push this
button. To turn the unit OFF,
push this button, again.
FAN SPEED
• Everytime you push this button,
it is selected as follow.
(High→Mid→Low→High)
TIMER/
CANCEL
FAN SPEED
TEMP
SLEEP
MODE
AUTO
SWING

6
3
REMOTE CONTROLLER DISPLAY
Room Air-conditioner
FAN
TURBO
COOLING
ROOM TEMP
TEMP
DESIRED TEMP
TIMER
SENSOR
MODE POWER
FAN
SPEED AUTO SWING
88
TEMP./TIMER DISPLAY
•It displays the temperature and the timer.
MODE DISPLAY
•It displays the operating mode.
REMOCON SIGNAL RECEIVER
TEMPERATURE SET BUTTON
•It is the button to set the desired
room temperature.
The temperature can be set
within a range from 16°C (60°F)
to 32°C (90°F) by 1°C (1°F)
POWER ON/OFF BUTTON
•To turn the unit ON, push this button.
To turn the unit OFF, push this button
again.
MODE SELECT BUTTON
•Everytime you push this button, It is selected as
follow. (COOLING→TURBO→FAN→COOLING)
FAN SPEED BUTTON
•Everytime you push this button, It is selected as
follow. (High→Mid→Low→High)
AUTO SWING BUTTON
•Everytime you push this button, the auto swing mode is toggled.
● SELECT ONE ALTERNATIVE PAGE 6 or PAGE 7

7
MODE FAN SPEED AUTO SWING POWER
Room Air-conditioner
Fan
Turbo
Cooling
Room temp
Desired temp
Timer
TEMP
SENSOR
TEMP./TIMER DISPLAY
•It displays the temperature and the timer.
MODE DISPLAY
•It displays the operating mode.
REMOTE SIGNAL RECEIVER
TEMPERATURE SET
•It is the button to set the desired
room temperature.
The temperature can be set
within a range from 16°C (60°F)
to 32°C (90°F) by 1°C (1°F)
POWER ON/OFF SWITCH
•To turn the unit ON, push this button.
To turn the unit OFF, push this button
again.
MODE SELECT
•Everytime you push this button, It is selected as
follow. (Cooling→Turbo→Fan→Cooling)
FAN SPEED
•Everytime you push this button, It is selected as
follow. (High→Mid→Low→High)
AUTO SWING
•Everytime you push this button, the auto swing mode is toggled.

8
Replacing Batteries
Remove the COVER from
the back of the remote
controller.
•Slide the cover
according to the arrow
direction
Insert two battaries.
•Be sure that the (+) and
(–) directions are correct
•Be sure that both batteries
are new
Re-attach the cover.
•Slide it back into position
•Do not use rechargeable batteries such batteries differ from standard dry cells in shape,
dimensions and performance.
•Remove the batteries from the remote controller if the air conditioner is not going to be used for
an extended length of time.
1 2 3
–+
–+

9
If you set time in OFF-Timer Mode, the unit will stop at the set time.
If you set time in ON-Timer Mode, the unit will run at the set time.
(1) Range of setting temperature: 16~32°C
(2) Setting temperature: Operating temperature of compressor
If the Unit Display receive the signal of Remote Controller, you can hear the signal "beep –" or "beep, beep".
OFF-Timer
4
DESCRIPTION OF FUNCTIONS
Unit ON
Unit OFF
SET Time HOUR
ON
OFF
ON-Timer
Unit ON
Unit OFF
SET Time HOUR
ON
OFF
Control of Room Temperature
Buzzer
COMP (ON)
(COOLING)
Desired temperature
COMP (OFF)
-1˚CTemperature
*Room temperatrue
< setting temperature
Compressor OFF
Room temperature
> setting temperafure
Compressor ON
(
(

10
(1) When you are going to sleep, select sleep button in remocon and the unit controls the room to the desired
temperature. (The unit will not operate after 4 hour)
(2) For changing the temperature.
• Mode I (L1)
•The unit will not operate after 4 hour.
• Mode II (L2)
•The unit will not operate perfectly after 10 hour.
(3) To cancel sleep mode, press the SLEEP button again or press the MODE button once. : the SLEEP indicator will
disappear in the display.
In normal operation, there is a time delay of three minutes between turn off and turning back on including
initial power up.
Sleep Mode
3min. Time Delay of Compressor
0 0.5 1.0 HOUR
SET TIME
Desired
Difference
desired temperature
between room
temperature (°C) 0.5°C0.5°C0.5°C
Temperature
Fan Speed
(1) Motor speed (high speed, normal speed, low speed).
(2) Remote controller setting fan speed. (H, M, L)
(3) Relation of operating mode between fan speed.
FAN ONLY COOL TURBO
HHHH
MMM -
LLL-
2hr 2hr 2hr 2hr 2hr
Desired
+1˚CTemperature +1˚C
SET ON
SET OFF
1°C
1°C
1°C

11
Auto Swing
(1) When you push this button, in remocon the left/right flap move to the position of keeping the room temperature
comiortable.
(2) The air discharge direction procedure is below.
Auto swing Fixed
(1) Cooling Condition
1Fan Speed: High speed
2Set temperature:16˚C(Fixed)
3Compressor and Fan
Turbo Mode(Powerful Cooling)
-1
OFF ON
(Room temperature-18˚C)
01
Self-Diagnostic Function
The control will contain diagnostic test to verify the integrity of the system.
(1)Error Code Display
ERROR CODE 88 LED DISPLAY ERROR CONTENTS
1 Room air thermistor short or open.

12
3. WIRING DIAGRAM
(3103529000)

13
4. REFRIGERANT CYCLE
Evaporator
Capillary tube
Blower fan
Condenser
Propeller fan
Accumulator
Compressor
M MOTOR
Capillary tube
Charge Quantity
DWA-121R
ID1.6Øx L800
740g
DWA-122R
(DWA-124R)
790g
DWB-121R
730g
DWB-122R
(DWB-124R)
690g
DWC-121R
(DWC-124R)
680g
DWB-123R
760g
DWA-150R
790g
DWA-151R
(DWA-152R)
780g
Model Name
Contents
ID1.6Øx L600
ID1.6Øx L800
ID1.6Øx L900

14
5. CONTROL BLOCK DIAGRAM
Relay 3, 4, 5
Auto Swing
Moter Fan Motor Compressor
88 LED
Front PCB
Fan mode Lamp
Turbo mode Lamp
Remocon
Signal
Receiver
Cooling mode Lamp
Room Temp Lamp
Desired Temp Lamp
Timer Lamp
Operating Mode
Remote controller
Fan speed
Timer selection
Auto swing
Temp setting
ON/OFF
Sleep
A/D Converter
Beeper
Drive Ic Tr
Room Temp
Sensor
Relay 2 Relay 1
MICOM
Main PCB
DC 12V
DC 12V
DC 12V
DC 5V
DC 5V
Transformer

15
6. CIRCUIT DIAGRAM

16
NO PART NAME SPEC PART CODE Q’TY REMARK
1 IC MICOM TMP47P443N 13GSHK64-- 1 U1
2 IC DRIVE TD62004AP 13GT62004A 1 U3
3 IC DRIVE TD62783AP 13GT62783A 1 U2
4 IC REGULATOR KIA7812P 1KA7812AP- 1 U4
5 IC REGULATOR KIA7805P 1KA7805AP- 1 U5
6 IC RESET KIA7042P 1KA7042P-- 1 U6
7 FUSE CLIP AFC-520 3107000600 2 FUSE
8 FUSE 250V, 3.15A 5FULB3152L 1
9 RELAY CS11-12SH 5SC0101128 4 RL2
10 RELAY POWER G4A-1A 5SC010141A 1 RL1
11 RESONATIOR CST8.00MTW 4850L03610 1 OSC1
12 VARISTOR 15G561K D15G561K-- 1 VAR1
13 DIODE 1N4004 DZN4004A-- 4 D1-4
14 DIODE 1N4148 DZN4148A-- 1 D5
15 HEAT SINK 22(H)X23X17 3105797200 1
16 PCB FR-1 3104302100 1
17 BUZZER BM-20K 3105698100 1 BZ
18 TR KRC3198Y TZTC3198Y- 1 Q1
19 WAFER YW396-03AV 3108802500 1 CN4
20 WAFER YPW500-04 3108805500 1 CN5
21 WAFER YW396-03AV(BK) 3108802700 1 CN6
22 WAFER YW500-02V 3108803000 1 CN7
23 WAFER SMW250-02 3108804200 1 CN3
24 WAFER SMW250-08 3108804000 1 CN2
25 WAFER SMW250-10 3108802100 1 CN1
26 WAFER YF254S-02 3108804300 1 TEST
27 PIN GP881206-2 3108803500 1 POWER
28 RESISTOR 300, 1/4W, 5% RD-4K301J- 1 R4
29 RESISTOR 1K, 1/4W, 5% RD-4K102J- 1 R7
30 RESISTOR 5.6K, 1/4W, 5% RD-4K562J- 1 R1
31 RESISTOR 10K, 1/4W, 5% RD-4K103J- 5 R2,3,6,15,16
32 RESISTOR 12.7K, 1/4W, 5% RD-4K1272F 1 R5
33 RESISTOR 300, 1/2W, 5% RD-2K301J- 7 R8-14
34 RESISTOR ARRY 9A 103J RA8K8103J- 1 RA1
35 RESISTOR ARRY 8A 102J RA8K7102J- 1 RA2
36 C-ELEC 1000µF 35V SD CEXE1V108C 1 C2
37 C-ELEC 470µF 25V SD CEXE1E477C 1 C5
38 C-ELEC 100µF 16V SD CEXE1C107C 1 C7
39 C-ELEC 10µF 50V SD CEXE1C106C 1 C10
40 C-ELEC 4.7µF 50V SD CEXE1H475C 1 C11
41 C-CERA 103Z 50VDC CCXE1H103M 1 C13
42 C-CERA 104Z 25VDC CCXE1EH104M 7 C2-4,6,
9,12,13
43 JUMPER 10MM 3109400100 14 J1-6,9,12
J14-16,18
44 JUMPER 6MM 3109400200 4 J7-8,13,17
Part List
● MAIN PCB ASS’Y(3104302300)

17
NO PART NAME SPEC PART CODE Q’TY REMARK
1 LED DISPLAY 88 3103003700 1 DISP
2 C-CERA 103Z 50VDC CXCH1H103M 1 C1
3 RECEIVE MODULE PIC-26043TH2 1PC26043TH 1 REMO
4 LED DLSO-5031D DDLS05031D 3
5 LED DLG-5031D DDLG5031D- 3
6 SWITCH TACT JTP1212 3109300900 6
7 DIODE 1N4148 DZN4148A-- 6 D1-6
8 WAFER SMAW250-08 3108804800 1 CN1
9 WAFER SMAW250-10 3108802400 1 CN2
10 PCB FR-1 3104302200 1
11 JUMPER 10mm 3109400100 7 J1-7
●Front PCB ASS’Y(3104302400)
NO PART NAME SPEC PART CODE Q’TY REMARK
1 CASE-A ABS380 3101100510 1
2 CASE-B BAS380 3101100600 1
3 CUSHION KEY SILICON 6U 3101405900 1
4 SPRING A SUS304 3105100600 1
5 SPRING B SUS304 3105100700 1
6 COMMON SPRING SUS304 3105100800 1
7 SCREW A M1.9*6.5 3108495110 3
8 RESONATOR RJ-455BL 5ZAR455--- 1 X1
9ELEC 10VB 47M CEAF10475M 1 C1
CONDENSOR
10 CHIP CONDENSOR CETMK212F221Z-T HCQD220MQ 2 C2,3
11 CHIP RESISTOR 1/10W 1.5 OHM HRFT159JCP 1 R1
12 CHIP RESISTOR 1/10W100K OHM HRFT104JCP 3 R2,3,4
13 TRANSISTOR STN2222 TSTN2222- 1 Q1
14 LED IR SI5312-H DS5312-H-- 1 IR1
15 IC REMOCON PT2221 14EZPT2221 1 U1
16 COVER BTRY ABS 3101405900 1
17 PCB REMOCON FR-1 3104302000 1
18 HOLDER ABS 3103003400 1
REMOCON
●Remocon ASS’Y(3108402900)

18
7. TROUBLE SHOOTING
1) Error Code 1(Er)
1Check the connector of room air thermistor. (or connecting wire)
2Check soldering of connecting on control P.C.B. (Error of soldering or short)
3Check the resistance of room air thermistor.
“Press the temperature Keys (Up & Down), Error code is displayed.”
Self-Diagnostic Function
The power is applied to the unit
Check the voltage between “POWER ”
and
“RL1 ”of Main P.C.B
4
1Check the
Breaker or Fuse
Self Diagnostic
function is ON
Check according to
self Diagnostic function
Main P.C.B defect
Check the unit display
is all off?
Press the ON/OFF button of
Remote Control or Front Panel
Is the unit display all off?
Pull out the power plug
and then insert the power plug
after 5 second
Main P.C.B is normal
Recheck from the beginning
Rating voltage more than 90%
Rating voltage
under 90%
No No
No
Yes Yes
Unit Not Run

19
- Check the following at cooling mode
Check the voltage between “POWER ”
and
“RL1 ”of Main P.C.B
3
1
Check the compressor wiring
Check the Relay(RL1)
Check the wiring of outdoor unit
Check the compressor
(Check the winding resistance)
Check the compressor capacitor
Check the connecting
wire between Main
P.C.B and the
compressor
Change Relay(RL1)
Change the
compressor.
Check the Main P.C.B
the circuit for relay
driving.
Rating voltage
less than 90%
NG
Open or Short
Rating voltage
less than 90%
Rating voltage more than 90%
Rating voltage more than 90%
OK
Only Compressor Do not Run