Daewoo DW-121R, DWA-150R Service Manual

CONTENTS

1. Specifications................................................................................................2

2. Operation.....................................................................................................3

3. Wiring Diagram..........................................................................................10

4. Refrigerant Cycle.........................................................................................11

5. Control Block Diagram.................................................................................12

6. Circuit Diagram..........................................................................................13

7. Trouble Shooting..........................................................................................16

8. Key Components of Electronic Circuit............................................................26

9. Disassembly Instructions ...............................................................................28

10. Exploded Diagram and Parts List...................................................................30

Contents

2

1. SPECIFICATIONS

ITEM

MODEL

DWC-121R DWB-121R DWA-121R DWA-150R

Function Cooling only
Power source AC 115V, 60Hz AC 220~240V, 50Hz AC 208~220V, 60Hz

Cooling Capacity

Btu/h 12,100 Btu/h 12,000 Btu/h 12,000 Btu/h 14,018 Btu/h
Kcal/h 3,050 Kcal/h 3,024 Kcal/h 3,024 Kcal/h 3,533 Kcal/h

Energy Efficiency Ratio

Btu/wh 10.1 Btu/wh 9.5 Btu/wh 10.2 Btu/wh 9.4 Btu/wh
Kcal/wh 2.55 Kcal/wh 2.39 Kcal/wh 2.57 Kcal/wh 2.38 Kcal/wh

Dehumidification Pts/h 3.40 Pts/h 3.30 Pts/h 3.61 Pts/h 4.04 Pts/h

Electrical Data

Power Input 1,200 W 1,263 W 1,175 W 1,487 W
Running Current 11.5A 5.6A 5.5A 6.7A

Compressor

Type Rotary
Model QK164CN12 QK196PN22B QK164KN12 QJ196KC23B
Capacitor 40µF/370VAC 35µF/400VAC 25µF/370VAC 25µF/370VAC
Model AM12DWD10-1 A2929CA01A AM12DWD12-1 AM12DWD11-1

Motor

Capacitor 12µF/370VAC 5µF/400VAC 5µF/370VAC 4µF/370VAC
Indoor-Fan Blower-Fan
Outdoor-Fan Propeller-Fan

Refrigerant(R-22)

Control Capillary
Charge Q’ty 680g 700g 740g 790 g

Dimensions

Unit(W x H x D) 23.6(W) x 14.9(H) x 21.0(D) inch (600(W )x 380(H) x 535(D) mm)
Packing(W x H x D) 26.1(W) x 18.1(H) x 22.6(D) inch (663(W )x 460(H) x 573(D) mm)

Weight

Net Weight 88 lbs (38.8Kg) 90.2 lbs (39.8Kg) 88 lbs (38.8Kg) 92 lbs (42Kg)
Gross Weight 89 lbs (40.3 Kg) 97.5 lbs (43Kg) 89 lbs (40.3 Kg) 96 lbs (43.5Kg)

4

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

✽ Do not use the REMOTE CONTROLLER before the lamp lights. If use, the “°F ” temperature display can

change to “°C ” temperature display (only “°F” temperature display model).

Replacing Batteries

6

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

– +

– +

8

(1) When you are going to sleep, select sleep b utton 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 b utton 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°C

0.5°C

0.5°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

H H H H
M M M -
L L L -

1

1

1

2hr 2hr 2hr 2hr 2hr

Desired

+1˚C

Temperature

+1˚C

SET ON

SET OFF

1°C

1°C

1°C

10

3. WIRING DIAGRAM

12

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

14

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 125V, 5A 5FULB502L- 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 ·‚ Ø , 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 2 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)

16

7. TROUBLE SHOOTING

1) Error Code 1(Er)

1 Check the connector of room air thermistor. (or connecting wire)
2 Check soldering of connecting on control P.C .B. (Error of soldering or short)
3 Check the resistance of room air thermistor.

“Press the temperature Ke ys (Up & Down), Error code is displa y ed.”

Self-Diagnostic Function

The power is applied to the unit

Check the voltage between “PO WER ”

and

“RL1

”

of Main P.C.B

4

1

Check 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 P anel

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

Power Supply(1)

DESCRIPTION

DC Po wer Supply in circuit needs +12V and +5V. +12V is used for Compressor Driving Relay, Fan Motor
Driving Relay, Buzzer Driving, Swing Motor Driving Rela y and LED Displa y. AC voltage of secondary Pow er
Transformer is rectified by 4 Diode, and it is filtering by Main Condensor C2.
Filtered DC voltage is about +17V is regulated +12V DC by Regulator IC7812.
And it is regulated +5V DC by Regulator IC7805.
V AR1 is surge filter and C4, C6 is Noise filter.

AC 220V

C1
335

VAR1

POWER

TRANS

+

C2

2200/35V

+

C7
100/16V

2

13

C6

0.1

+

C5
470/25V

C4

0.1

C3
104

7812

2

13

7805

21

Room temperature Sensor Input

Temperature

(°C)

No. 15

-10 4.06
0 3.60

15 2.76
25 2.20
40 1.48

Voltage (V)

Table 3-1

Sensor(3)

MICOM

15

R4

300

C13

0.01

R3

12.7K

Vcc

ROOM:PT-K43C

2
1

DESCRIPTION

Number 15 of Micom is Terminal of A/D conv ertor Input.
Room temperature is sensing by change of Thermister Resistance, Micom is put in 5V by ratio between R3
(12.7KΩ) and Room sensor.
Relation between temperature and voltage is f ollowing Table 3-1.
C13 is Noise filter.

23

DESCRIPTION

MICOM Po wer is supplied 5V at Number 28 using VDD, Number 6 using Analog Reference of A/D Converter.
C9, C10 is Ripple filter.

Micom Power Supply(5)

MICOM

28

14

6

C10
100µF/16V

C9
104

Vcc
5V

25

R3
10K

R2
10K

+5V

MICOM

13

27

˚F/ ˚C

TEST

Function Selecting(7)

Table 9-1

Selection S/W

SHORT OPEN

Function

˚F / ˚C ˚F ˚C

TEST OK NO

DESCRIPTION

Selecting Function is as following table 9-1.

27

(3) U2(TD62004AP) DARLINGTON ARRAYS

(4) U7 (7805CT): VOLTAGE REGULATOR (5VDC)

(5) U6 (7812ACT): VOLTAGE REGULATOR (12VDC)

IN1 1 16 OUT 1

IN2 2 15 OUT 2
IN3 3 14 OUT 3
IN4 4 13 OUT 4
IN5 5 12 OUT 5
IN6 6 11 OUT 6
IN7 7 10 OUT 7

GND 8 9 COMMON FREE

WHEELING DIODES

COM

10.5K

7.2K 3K

(Top View)

(Equivalent Circuit)

100K 500

100

100

0.3

10K

6K

500

1K

5K

28K

6K

30pF

2K

5K

200

240

1.4
K

2.7
K

3.3
K

0.19K

INPUT

OUTPUT

GND

SCHEMATIC DIAGRAM

1
2
3

Fin 2 is ground
for Cose 221A.
Case is ground
for Case 1.

10K

INPUT

GND

10K

300
36K
64K

520

26K

60K

29K

20K

20K

40
pF

50K

50 200

300

200

100

16K

210

012

OUTPUT

Pin 1. INPUT

2. GROUND

3. OUTPUT

TSUFFIX
PLAASTIC PACKAGE
CASE 221A
TO-220TYPE

Pin 1. INPUT

2. GROUND

3. OUTPUT

KID65004AP

(Equivalent Ciircuit)

29

• HOW TO REMOVE THE FRONT GRILLE

1. Remove the Air Filter from the front grill by pulling up.

2. Remove two screw tapping from front grille.

3. Push the “LATCH position” at the right side of cabinet.

4. Push it again to separate the front grille from the cabinet as shown in Fig. 2

5. Push lower left side of the cabinet and Pull lower left side of the front grille until it is separated from the cabinet
as shown in Fig. 3

6. Push base side of the front grille to upper side until it is separated from the cabinet as shown in Fig. 4

Fig. 1

Push

Screw

Fig. 2

Push

Fig. 3

Fig. 4

31

No. CODE COMPONENTS Q’TY SPECIFICATION REMARK

26 7007501211 SCREW HEX 4 5X12MFZN
27 3101802700 FAN PROPELLER 1 ABS + GF20%
28 3102201100 WINDOW KIT FRAME(L) 1 HIPS
29 3102201000 WINDOW KIT FRAME(R) 1 HIPS
30 3100604200 PLATE WINDOW TOP 1 SGCC T1.2
31 3100801400 CABINET AS 1 SGCC T0.8
32 3100604300 BRACKET WINDOW LOWER 2 SGCC T0.8
33 3100604500 BRACKET SILL 2 SGCC T1.6
34 3106600600 SCROLL LOWER 1 EPS
35 3103700100 LEVER VENT 1 PP
36 3103700100 WASHER VENT 1 PP
37 3104600100 RING VENT 1 NBR
38 3106700400 CAM 1 POM
39 7141300611 SCREW TAPPING 4 PAN 3X6
40 3104302300 PCB MAIN AS 1 –
41 3104302400 PCB FRONT AS 1 –
42 3102708900 HARNESS COIL SENSER 1 –

3101396140 POWER CORD 1 WS-001M, 10A 250V DWA-121R/150R(ONLY)

43 3101300600 POWER CORD 1 MP231, 10A 250V DWB-121R(ONLY)

3101300300 POWER CORD 1 KKP-308, 13A 125V DWC-121R(ONLY)
3109503200 CAPACITOR 5/25µF/370VAC DWA-121R(ONLY)

44

3109503300 CAPACITOR 1 5/35µF/370VAC DWB-121R(ONLY)
3109503110 CAPACITOR 1 12/40µF/370VAC L=110MM DWC-121R(ONLY)
3109503410 CAPACITOR 1 4/25 F/370VAC DWA-150R(ONLY)

45 3101200600 CLAMP CAPACITOR 1 SGCC T0.8

46

3108004800 MOTOR SWING 1 120V/60Hz DWC-121R(ONLY)
3966031000 MOTOR SWING 1 200/220V 50/60Hz

DWA,B-121R/DWA-150R(ONLY)
47 3100508510 BOX CONTROL 1 SGCC T0.8
48 3106600500 SCROLL UPPER 1 EPS
49 3103002800 HOLDER SCROLL 2 SGCC T0.8
50 3104409300 PIPE RUBBER BUTYL 1 –

51

3102707500 HANESS COMP AS 1 UL1015–14,BLK,RED,WHT DWC-121C/R(ONLY)
3102708800 HANESS COMP AS 1 UL1015–16,BLK,RED,WHT

DWA,B-121R/DWA-150R(ONLY)
52 3103200500 CAP DRAIN 1 ABS
53 3102708500 HARNESS DISPLAY 1 1 UL1007-22(8COLOR)
54 3102708600 HARNESS DISPLAY 2 1 UL1007-22(10COLOR)
55 3107000400 CLIP THERMO 1 PP

NOTE:

ƒƒRR ¡¡

Ê

A or B or C

§§

ö

DWA-121R, DWB-121R, DWC-121R, D WA-150R EXPLODED DIAGRAM

S/M NO.: DWC121R010

DAEWOO ELECTRONICS CO ., LTD.

686, AHYEON-DONG MAPO-GU SEOUL, KOREA
C.P.O. BOX 8003 SEOUL, KOREA
TELEX: DWELEC K28177-8
CABLE: “DAEWOOELEC”
FAX: [phone]
TEL: [phone]-6151~5

http://www.dwe. daewoo.co.kr

PRINTED DATE: APR.1999

VISION CREATIVE, INC.

`– ‚ ‡† ·º„fi•˛ 5 ¡ 526

·º¿·”ø 16ˆ

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TTEELL

0335-329-8212

MM OO DD EE LL

DWA-121R, DWB-121R, DWC-121R,DWA-150R

BB UU YY EE RR

1´ 6´
2´ 99.4.16(…`⁄ ) 7´

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