Daewoo DPB-280LH User Manual

Service Manual

FLOOR STANDING AIR CONDITIONER

Model: DPB-280LH

DAEWOO ELECTRONICS CO., LTD.
OVERSEAS SERVICE DEFT.

CONTENTS

1. Installation Guide...........................................................................................2

2. Specification..................................................................................................5

3. Outline..........................................................................................................6

4. Operation.....................................................................................................8

5. Circuit Diagram...........................................................................................18

6. Refrigerant Cycle.........................................................................................35

7. Trouble Shooting..........................................................................................36

8. Exploded Diagram ......................................................................................43

Contents

2

1. INSTALLATION GUIDE

1

INSTALLATION PLACE

◆Indoor unit ◆Outdoor unit

Secure enough space from the neighboring objects as shown below.
This is required to operate the unit efficiently.

• Flat and strong place in the room

• No obstacles in front of air in/out grille

• Easy place to connect drain hose to outside of room

• Easy place to connect copper tube with outdoor unit

• Secure enough distance from neighboring objects as
shown below.

• Secure enough distance from neighboring objects as
shown below.

• A place no reach of direct ray of sun (if necessary, shield the
light)

• No obstacles in front of air in/out grille

• A place having a drain out-let

• Easy place to connect copper tube with indoor unit

• Secure enough distance from neighboring objects as shown
below.

100cm

5cm

10cm

50cm

10cm

50cm

(Indoor unit) (Outdoor unit)

Lquid

Gas

3/8”
5/8”

A

12~12.4

18.6~19

B

9.52

15.88

Unit: mm

Nominal diameter

Flare specification

Lquid

Gas

3/8”
5/8”

Unit: mm

Torque
300Kg • cm
500Kg • cm

Torque

B

CAUTION : Do not hang the outdoor unit on the wall of building, in case of falling, it may cause a serious trouble and damage.

2

SPACE TO INSTALL

◆ Specification and method of copper tube

• Connection method of copper tube is to make connection with flare nut at the end of the copper tube with a flare tool.

3

3

INSTALLATION OF INDOOR UNIT

1) Drain hose should maintain downward slope to outside of room.

2) Indoor unit should be fixed firmly with the bracket to avoid falling down.
The bracket has several holes to fix the unit any direction needed
(fore/back/right/left)

1) Cushion rubbers absorb vibration of outdoor unit

2) The unit must be grounded for safety in accordance with local

electrical codes. (Grounding resistance should be under 100 ohms)

2

1

1

2

CAUTION

• Use designated diameter and thickness of tube.

• Connect all tube as short as possible and fix firmly.

• Less than 3M of the difference of height between indoor

and outdoor unit is desirable.

• Fill up more refrigerant if the connection tube is longer
than 5M (50g/M).

(The refrigerant volume filled from the factory is suitable
for 5M connection)

• Be careful not to let in any dust or motes into the tube

when the tube passes the wall.

• When insulating the connection, use foam rubber or

equivalent.

(Connecting method)

4

INSTALLATION OF OUTDOOR UNIT

5

REFRIGERANT TUBE CONNECTION

IDU TERMINAL BLOCK

321YN L

ODU TERMINAL BLOCK

321YN L

220V/50Hz

4

6

ELECTRICAL WIRING

SIGNAL LINE
SIGNAL LINE
SIGNAL LINE

SIGNAL LINE
MAIN POWER (INDOOR)
MAIN POWER (INDOOR)
MAIN POWER (INDOOR)

MAIN POWER (OUTDOOR)
MAIN POWER (OUTDOOR)
MAIN POWER (OUTDOOR)

(Specification of harness)

3
2
1
Y

N

L

N

L

Spec

1.25mm

2

1.25mm

2

1.25mm

2

1.25mm

2

1.25mm

2

1.25mm

2

1.25mm

2

2.0mm

2

2.0mm

2

2.0mm

2

Color

BLUE

BLACK

RED
BROWN
BROWN

YEL/GRN

RED(or BLUE)

BLACK

YEL/GRN

WHITE

CAUTION

• Be sure to use designated wires and make it as short as possible

• Use an exclusive power supply for the air conditioner

• Use an electricity leakage interrupter having suitable capacity.

• Grounding resistance should be under 100 ohms and the grounding wire should be connected firmly to the

terminal of out door unit.

■ Wire connection of indoor and outdoor unit

• When connecting wires of indoor and outdoor unit, the numbers of terminal block and terminals of connecting wires should
match exactly as shown below.

• Terminals of connecting wires should be fixed firmly using wire fixing tool to the same direction of terminal board.

(Diagram of wire connection)

5

2. SPECIFICATIONS

MODEL

DPB-280LH

ITEM

Function COOLING HEATING
Class T
Power 220~240V/ 50Hz
Capacity W 8,200 8,200

Btu/h 28,000 28,000

Dehumidification l/h - -

Running Current A 14 14
Power Input W 2,800 2,800
Starting Current A ­Type Scroll
Model ZR36K3-PFJ-501
Capacitor 50µF/370V AC

Indoor Unit Outdoor Unit
Type Sirocco Propeller fan
Capacitor 5µF/400V AC 8µF/370V AC
Motor Model Number DE112 A2935BA010
Control Capillary
Charge Q'ty g 2,000
Type Flare
OD

(Liquid/Suction)

in(mm) 3/8” (9.52mm) 5/8” (15.88mm)
Dimensions (W x H x D) mm 500 x 1,830 x 350 872 x 675 x 325
Net Weight kg 40 66

Electrical

Data

Compressor

Fan

Refrigerant

(R-22)

Connection

◆DPB-280LH

4

5

2

7
6

1

3

6

3. OUTLINE

1

INDOOR UNIT

◆DPB-280LH

No Part Name Quantity Description Remarks

1 Connecting Hole 3 ø60X100 (Left, Right, Back)
2 Evaporator 1 Heat Exchanger
3 Suction Grille 1 Air Inlet
4 Discharge Grille 1 Air outlet
5 Fan Blower 1 Sirocco Type
6 Joint (Gas) 1 OD ø15.88mm
7 Joint (Liquid) 1 OD ø9.52mm

7

2

OUTDOOR UNIT

◆DPB-280LH

No Part Name Quantity Description Remarks

1 Service Valve (Liquid) 1 OD ø9.52mm Flare Type
2 Service Valve (Gas) 1 OD ø15.88mm Flare Type
3 Service Door 1
4 Fan Guard 1 Fan Protector
5 Fan Blower 1 Propeller type
6 Condenser 1 Heat Exchanger
7 Fan motor 1 Foor propeller fan
8 Compressor 1 Depend on Models
9 Earth Bolt 1 Ground

10 Connection Hole 1 Power & Control wire

8

1

PARTS OF NAME AND FUNCTION

Indoor Unit

4. OPERATION

MAIN CONTROLS/
REMOTE SENSOR

LCD REMOTE CONTROLLER

- Operative distance is within 7m from
the indoor unit.

- Use toward to the remote sensor

AIR OUT

- According to the operation mode, it
is opened/closed automatically.

AIR IN

- It is to suck warm air.

- There is an air filter inside this grille.

• The method to open the air suction
grille
Pull the upper side of grille with
both hands.

MODE

SLEEP

ON/OFF

TIMER

ENTER/

CANCEL

FAN SPEED

TURBO/MILD

A
U

T
O

F
A
N

D
I
R

.
F
A
N

D
IR

.

9

ROOM TEMPERATURE / DESIRED TEMPERATURE INDICATOR

- It displays current room temperature and desired room temperature.

FAN MODE INDICATOR

AUTO MODE INDICATOR

TIMER/SLEEP INDICA T OR

ECONOMY MODE
INDICA T OR

MODE BUTTON

ECONOMY MODE BUTTON

ON/OFF BUTTON

- Whenever you push this button.
It repeats on -> off -> on -> off.

AUTO F AN SPEED INDICATOR

FAN SPEED INDICATOR

COOL MODE INDICA T OR

QUICK MODE

INDICA T OR

HEA T MODE

INDICA T OR
(ONLY HEAT PUMP
MODEL)

MILD MODE INDICA T OR

DEHUMIDIFIER MODE
INDICA T OR

FAN SPEED BUTT ON

- AUTO -> LOW -> MIDDLE ->
HIGH -> NATURAL

TEMPERA TURE BUTT ONS

- Each time you push
this button, temperature
goes up by 1˚C.

- Each time you push
this button, temperature
falls by 1˚C.

10

Outdoor Unit

OUTDOOR UNIT AIR IN

- If there is any obstacle in front
of the grille, the efficiency of
the unit can be lowered.

OUTDOOR UNIT AIR OUT

SERVICE VALVES(GAS TUBE)

SERVICE VALVES(LIQUID TUBE)

CAUTION

• Do not install the outdoor unit on
unstable place like outside wall of
building or outside of balcony. In case
of falling, it may cause serious trouble
and damage.

11

Name of Each Button

2

REMOTE CONTROLLER

MODE

SLEEP

ON/OFF

TIMER

ENTER/
CANCEL

FAN SPEED

TURBO/MILD

Display

Displays information
pertaining to unit.

TURBO/MILD

Press to be more silent and
comfortable room condition

TIMER ENTER/CANCEL Button

Press to enter a timer setting or
to cancel timer setting

TIMER ON/OFF Button

Press to set the unit off or on time.
(0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8,
10, 12, 16, 20, 24hr)

MODE Button

Press to cycle through the modes
(Auto/Quick/Cool/Fan/Dehumidifier/
Heat)

SLEEP Button

Press to set the unit for
the sleep mode.

FAN DIR. Button

Press to select up/down
direction for fan.

FAN DIR. Button

Press to select left/right
direction for fan.

ON/OFF Button

Press to turn the unit
on or off.

TEMPERATURE Buttons

Press to raise or lower
the desired temperature.

FAN SPEED Button

Press to select the fan speed
(Auto, High " ", Middle " ",
Low " ", Natural).

COVER

Slide down to access most
of the remote buttons.
Slide down further to
access the battery
compartment.

AUTO

FAN DIR.

FAN DIR.

12

Replacing Batteries

3

REMOTE CONTROLLER DISPLAY

Slide down the cover to
access most of the
remote buttons. Slide
down further to access
the battery compart­ment.

Insert two “AAA” size
Alkaline batteries
following the polarity
diagram below.

1

2

MODE Indicators (Auto/Quick/Cool/Fan/Dehumidifier/Heat)

Lights to indicate the mode selected.

TIMER Indicators

Lights to indicate the timer function mode.

TEMPERATURE & RESERVATION TIME lndicator

Lights to indicate the temperature or time.

FAN DIRECTION Indicators

Lights to indicate the
fan direction.

NATURAL Indicator

Lights to indicate the
speeds simulating a breeze.

FAN Indicators

Lights to indicate
the fan speed.

AUTO

ON/OFF

TIMER

ENTER/
CANCEL

TURBO/MILD

+–

+–

13

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: 18~32°C
(2) Setting temperature: Operating temperature of compressor

(3) During the time of test operating, Fan (Indoor, Outdoor) and Compressor is running regardless of room

temperature.

If the Indoor Unit Display receive the signal of Remote Controller, you can hear the signal "beep –" or "beep,
beep".
(1) In the case of receiving ON/OFF signal-“beep” “beep”
(2) And so on-“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)

*RT: ROOM TEMPERATURE
DT: DESIRED TEMPERATURE

COMP (OFF)

-1°C0°C
(COOLING)

(RT-DT)

COMP (ON)

COMP (OFF)

-1°C0°C
(HEATING)

(DT-RT)

+1˚C +1˚C

14

Fan Speed (Indoor Unit)

(1) Motor speed (high speed, middle speed, low speed).
(2) Remote controller setting fan speed. (Auto, L, M, H, Natural)
(3) Relation of operating mode between fan speed. (legned: X-no relation)

(4) Automatic Operation
If the unit is set in 'AUTO' mode, the unit operates automatically according to the room temperature to keep the
room temperature comfortable.

0°C

L

M

H

1°C2°C

(RT-DT)

L

H

M

0°C1°C2°C3°C (DT-RT)

(COOLING)

(HEA TING)

FAN ONLY COOL

DEHUMI-

AUTO QUICK HEAT

DIFICATION

H HHLHH H
M MMLMH M
L LLLLH L

Auto X Auto L Auto H Auto

Natural Natural Natural L Natural H Natural

15

(1) When you are going to sleep, select sleep switch and the unit controls the room to the desired temperature.

(The unit will not operate after 4 hour)

(2) For changing the temperature.

(3) To cancel sleep mode, press the SLEEP button again or press the MODE button once.: the SLEEP

indicator will disappear in the display.

Sleep Mode

0 0.5 1.0 HOUR

(COOLING CYCLE)

DT

+0.5°C

+0.5°C

+0.5°C

0 0.5 1.0 HOUR

(HEATING CYCLE)

DT

–0.5°C

–0.5°C

–0.5°C

Frost Prevention of Indoor Unit

When the unit operates at low ambient temperature, frost may appear on the Evaporator. When the indoor coil
temperature is lower than -2°C at the end of 10 minutes of continuous compressor operation from the start, the
microcomputer of the unit stops the compressor to protect the unit from the frost. The control procedure for
indoor coil freeze protection.

1) The compressor and outdoor fan turn off.

2) Indoor fan operates according to user set speed.

3) The normal operation returns when the indoor coil
temperature is higher than 7°C or equal to 7°C.

7°C-2°C

Compressor and
Outdoor Fan

OFF

ON

(Indoor coil temperature)

16

Auto Mode

(1) In Auto Mode

After the indoor fan is operated for 20 seconds in the Auto Mode, the unit will operate automatically by selecting
operating Mode according to the room temperature

(2) Selecting Operating Mode Again

Room temperature meets desired temperature and the compressor stops running over 30 minutes, then the unit
selects operating Mode again.

3 Seconds Time Delay of Indoor Fan Motor

When the speed of indoor fan motor changes, there is a time delay of 3 seconds at each speed step.

ROOM TEMPERA TURE

DT+3˚C RT

DT-2˚C RT DT+2˚C

DT -2°C RT

OPERA TING MODE

Cooling

Dehumidifier

Heating

RT: Room temperature
DT: Desired

()

3 min. Time Delay of Compressor

In normal operation, there is a time delay of three minutes between turn off and turning back on including initial

< <

>

<

17

(1) Cooling Mode
* When the room temperature is higher than 22˚C or

equal to 22˚C

1Fan Speed: high speed (Fixed)
2Air discharge direction: The control is available.
3Set temperature: 18°C (Fixed)

(1) Heating Mode
* When the room temperature is lower than 22˚C

1Fan Speed: high speed (Fixed)
2Air discharge direction: The control is available.
3Set temperature: 32°C (Fixed)

Dehumidification Mode

Air Discharge Direction

Quick Mode(Powerful Cooling & Heating)

1DT+1˚C < RT

Outdoor Fan, Compressor : ON
Indoor Fan : Low speed

2DT-1˚C RT DT+1˚C

Outdoor Fan, Compressor : 3 min/ON, 5 min/OFF
Indoor Fan : Low speed

3DT-1˚C > RT

Outdoor Fan, Compressor : OFF
Indoor Fan : Low speed

<

<

1. Press fan direction button to select fan direction

• Press desired fan direction button, "UP • DOWN" or "LEFT • RIGHT" control louver moves, press
again to stop

FAN DIR.

FAN DIR.

Self-Diagnostic Function

The control will contain diagnostic test to verify the integrity of the system.

(1) Error Code Display : RT (Room Temperature) LED

ERROR CODE

DISPLAY ERROR CONTENTS

1 “E2” Indoor unit sensor open or short

2 “E2” Outdoor unit sensor open or short

3 “ E3 ”

Compressor, Electrical parts of
comp. Gas leak

18

5. CIRCUIT DIAGRAM

◆ DPB-280LH

1

WIRE CONNECTION OF INDOOR AND OUTDOOR UNIT

19

◆ DPB-280LH

2

MAIN ELECTRIC PARTS

Object/part No.

Motor-compressor
Outdoor fan motor
Indoor fan motor
Thermal protector for

fan motor

Synchronous motor

Stepping motor
Dual capacitor for

compressor and
outdoor fan motor

Running capacitor
for indoor fan motor

Terminal block
Transformer
Reversing valve
Compressor heater
AC Control realy
Relay
Fuse
X2 capacitor
Photocoupler
Varistor
Triac

Manufacturer/trademark

Copeland
DMI
O-YANG
Korea Taxas

Instruments
Jaeil engineering
Namyang Precision

(Alter)
Hyup jin precision

Samwha capacitor

Samwha capacitor

Donglim
Namsung electronics
Ranco japan
Young chang
Omron electronics
Chung won electronics
Triad electronics
Pilkor electronics
Toshiba electronics
Marcon electronics
Toshiba electronics

Type/model

ZR36K3-PFJ
A2935BA010
DE112
17AM035A5

ST-16
NYM-16H-1

MSFCC20F02

37H08500B

PEB-958

DTB-8P
DWA-5401FN
V26110D

G7L-2A-TUB
CS11-12H
50T
PCX2 335
TLP560J
TNR15G561K
SM3JZ47

Technical data

AC220-240V 50Hz R22
AC 230V 50Hz
AC 230V 50Hz
AC 250V

AC 220-240V 50/60Hz
AC 220-240V 50/60Hz

DC 12V

8/50µF 370VAC

5µF 400VAC

AC 300V 25A
AC 220V/18VDC 50/60Hz
AC 220-240V 50Hz
AC 220V 40W
AC 220-240V 25A
AC 250V 5A
AC 250V 3.15A
AC 275V
AC 250V
504-616V 50A
600V 3A

Standard

Mark(s) of confirmity

DEMKO
NONE
NONE

VDE
NONE

NONE

TUV, UL, CSA

TUV, UL, CSA

NONE
NEMKO
NONE
NONE
VDE
TUV, UL, CSA
VDE
VDE, N.S.
VDE
UL
UL

20

3

PCB CIRCUIT DIAGRAM

21

NO Part Code Part Name Quantity Specification

1 3108803400 PIN 3 GP881206-2(187)
2 5FVLB3152L FUSE 1 250V 50T 3.15A
3 3107000600 FUSE CLIP 2 AFC-520
4 3108802500 WAFER 1 YW396-03AVD
5 3108802600 WAFER 1 YW396-03AVD (RD)
6 3108802700 WAFER 1 YW396-03AVD (BK)
7 3108802900 WAFER 1 YW396-05AVD
8 3108803000 WAFER 1 YW500-02V

9 3108801900 WAFER 1 SMW250-04
10 3108801910 WAFER 1 SMW250-04(RD)
11 3108802000 WAFER 1 SMW250-06
12 3108804100 WAFER 1 SMW250-07
13 3108802200 WAFER 1 SMW250-10 (RD)
14 D15G561K-- VARISTOR 1 15G561K
15 DZN4004A-- DIODE 6 1N4004 TAPE
16 CCXE1H102Z C-CERA 1 102Z,50VDC
17 CCXE1H103M C-CERA 1 103Z,50VDC
18 CCXE1E104M C-CERA 8 104Z,25VDC
19 CDXE1H104M C-MULTI 1 104Z,CR0561B-Z5U
20 CEXE35338M C-ELEC 1 3300uF 35V SD
21 CEXE1V108C C-ELEC 1 1000uF 35V SD
22 CEXE1E477C C-ELEC 1 470uF 25V SD
23 CEXE1C106C C-ELEC 1 10uF 50V SS
24 CEXE1C475C C-ELEC 1 4.7uF 50V SS
25 CN4XD104M CAPA. ARRAY 1 F4 104Z
26 RN-4K1272F RESISTOR 2 1/4W-12.7KF
27 RD-4K103J- RESISTOR 10 1/4W-10KJ
28 RD-4K842F- RESISTOR 2 1/4W-8.4KF
29 RD-4K562J- RESISTOR 2 1/4W-5.6KJ
30 RD-4K102J- RESISTOR 3 1/4W-1KJ
31 RD-4K301J- RESISTOR 4 1/4W-300J
32 RD-4K101J- RESISTOR 1 1/4W-100J

22

NO Part Code Part Name Quantity Specification

33 RD-2K200J- RESISTOR 1 1/2W-20J
34 RD-2K390J- RESISTOR 2 1/2W-39J
35 RD-2K121J- RESISTOR 5 1/2W-150J
36 RD-2K102J- RESISTOR 1 1/2W-1KJ
37 CLV-B3104M C-LINE ACROSS 1 275V 104K
38 4EFR-37071 SNUBBER 1 0.1UF 120 300V
39 3105796100 HEAT SHINK 1 33(H)X23X17
40 3106002900 WASHER 1 HEAT SINKøÎ
41 3105698200 BUZZER 1 DP-2520BA
42 52C131J003 COIL 1 130uH 3A
43 3109400100 JUMPER 32 10mm
44 3109400100 JUMPER OPTION 1 10mm
45 3104398700 PCB MAIN 1 162X169
46 5SC0101128 RELAY 5 CS11-SH12
47 1KA7812AP- IC REGULATOR 1 KIA7812P
48 1KA7805AP- IC REGULATOR 1 KIA7805P
49 TKRC102M-- TR 2 KRC102M
50 1KA7042P-- IC RESET 1 KIA7042P
51 4850103610 RESONATOR 1 CST8.00MGW
52 TSM3JZ47-- TRIAC 1 SM3JZ47
53 1TLP560J-- PHOTO COUPLER 1 TLP560J
54 13GS87PH46 IC MICOM 1 TMP87C846AN
55 13GT4051B- IC MUX 1 TC4051BP
56 13GT62004A IC DRIVE 2 TD62004AP
57 13GT62783A IC DRIVE 1 TD62783AP

23

Power Supply(1)

DESCRIPTION

DC Power Supply in circuit needs +12V and +5V . +12V is used for Compressor Driving Relay, Triac Driving
Photo Triac, Buzzer Driving, Stepping Motor . AC voltage of secondary Power T ransformer is rectified by Bridge
Diode, and it is filtering by Main Condensor CE1.
Filtered DC voltage is about +18V , is regulated +12V DC by Regulator IC7812.
And it is regulated +5V DC by Regulator IC7805.
V AR is serge filter and CC1, CC2, CC3 is Noise filter .

AC 220V

CL1

275V
104K

VAR

FUSE1

3.15A

POWER TRANS

D2

CC1 CE1

D3

D1

D4

104

+
35V

1000µF

IC2
7812

VI VO

G

IC3
7805

VI VO

G

+
25V

470µF

CC2 CC3 CE3CE2

104

+

16V
100µF

104

12V 5V

Oscillator(2)

19

OSC

CC13
104

5V

8M

20

VDD-10%

V

SS+10%

Fig 2-1

DESCRIPTION

Oscillatory Frequency drive Micom, it is made up 8MHz resonator oscillatory Freqency.
Ocillatory wave is as following Fig 2-1.

4

PCB DRIVING DESCRIPTION

24

Room temperature and Evaporator temperature Sensor Input

DESCRIPTION

Number 23 of Micom is Terminal of A/D convertor Input.
Room temperature and Evaporator temperature is sensing by change of Thermister Resistance, Micom is put
in 5V by ratio between R37 (12.7KΩ) and R38 (12.7KΩ).
Relation between temperature and voltage is following Table 3-1.
CA1 is Noise filter.

Sensor(3)

EVA

PT-K43C

Room

PT-K43C

SMW250-04

CN10

5V

1
2
3
4

R37

12.7K

330

CA1
104

R31
330

R32

R38

12.7K

CA1
104

5 23 MICOM

1

MUX

Resistance & Voltage of the Sensor

temp(°C)

–10

–9
–8
–7
–6
–5
–4
–3
–2
–1

0
1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16

resistance1(Ω)

54,769
52,070
49,579
47,272
44,116
42,190
40,390
37,902
36,368
34,235
32,279
31,064
29,358
27,781
26,794
25,400
24,101
22,888
21,752
20,687
19,685

19,050
18,143
17,286
16,476
15,708
14,979

Vout(V)

0.941

0.980

1.020

1.059

1.118

1.157

1.196

1.255

1.294

1.353

1.412

1.451

1.510

1.569

1.608

1.667

1.725

1.784

1.843

1.902

1.961

2.000

2.059

2.118

2.176

2.235

2.294

temp(°C)

17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43

resistance1(Ω)

14,288
13,629
13,002
12,405
12,021
11,468
10,939
10,432

9,947
9,634
9,182
8,890
8,467
8,060

7,79,
7,415
7,168
6,809
6,577
6,239
6,020
5,806
5,597
5,392
5,094
4,901
4,711

Vout(V)

2.353

2.412

2.471

2.529

2.569

2.627

2.686

2.745

2.804

2.843

2.902

2.941

3.000

3.059

3.095

3.157

3.196

3.255

3.294

3.353

3.392

3.431

3.471

3.510

3.569

3.608

3.647

temp(°C)

44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70

resistance1(Ω)

4,526
4,435
4,255
4,080
3,908
3,739
3,656
3,493
3,332
3,253
3,098
3,021
2,870
2,795
2,721
2,576
2,504
2,433
2,363
2,293
2,156
2,088
2,020
1,954
1,888
1,822
1,758

Vout(V)

3.686

3.706

3.745

3.784

3.824

3.863

3.882

3.922

3.961

3.980

4.020

4.039

4.078

4.098

4.118

4.157

4.176

4.196

4.216

4.235

4.275

4.294

4.314

4.333

4.353

4.373

4.392

25

T riac Driving(4)

DESCRIPTION

Number 32 Terminal of Micom is put out Pulse Output, by way of Buffer it is driving Photo Triac is supplied
Trigger Signal.
Trigger Test of Triac is detected Zero Cross Part of AC input and it is triggered from Zero Cross part to Time
delay part according to Fan Speed. (Ref. Fig 4-1) SN1 is Snubber.

N
L

AC 220V

TO MOTOR

T1
SM3JZ47

L1

1

1

2

2

130µH
3A

SN1

0.1µF
120Ohm

TLP561
PT1

12V

R2
1K

1/2W

IC4

KID 65004

MICOM

32

710

AC220V

TRIGGER

MOTOR

INPUT

LOW SPEED MEDIUM SPEED HIGH SPEED

Fig 4-1

LOW SPEED

MIDDLE SPEED

HIGH SPEED

26

DESCRIPTION

Signal from Remote Controller put in only Control Data Signal at Micom T erminal of Number 33, which is gotten
fid of Carrier (38KHz) from Receive Module. Signal Wave repeat third as following Fig 5-1.
But in Secondary Wave Custom Code is Reversed Face.

LEADER CODE

CUSTOM

CODE

DATA
CODE

CHECK

SUM

TAILER

9ms 4.5ms 16bit 16bit24bit 8bit

Fig 5-1

Fig 5-2

BIT STRUCTURE

Remote Controller(5)

0.56ms 0.56ms1.69ms

1.12ms 2.25ms
bit 0 bit 1

27

DESCRIPTION

MICOM Power is supplied 5V at Number 42 using VDD, Number 19, 20 Using Oscillator, CC7 is noise filter .

Micom Power Supply(7)

VDD 42

CE4

10µF

16V

CC5
104

CC7
104

+

5V

41
40

39

22

21

19

OSC
8MHz

20

VSS

MICOM

28

DESCRIPTION

Voltage less than about 0.8V put in Micom Terminal of Number 18 and then Micom reset. Reset IC detect
Power ON and Voltage less than 4.25V, and then send Reset Signal.

Reset(8)

MICOM

18

+

CE5

4.7µF
50V

IC6
7042P

R4

5.6K

5V

4.25V

H

L

t

t

POWER

ON

Vcc (+5V)

DELAY TIME

FOR POWER ON

RESET

29

DESCRIPTION

Micom 34 Terminal put out Buzzer Driving Pulse,
its output is driving Buzzer through Buffer.
Ocillatory Frequency of buzzer is selected by
internal Micom.
This unit is setting at 2KHz.

VCC
12V

KID 65004

MICOM

34

611

R7
1K

BZ

Buzzer Driving(10)

DESCRIPTION

Selecting function is as following table 9-1.
✽ When power source is put at first, Funtion selection input is recognized.

And when the unit is running the microcomputer ignore variation of funtion selection input.

27
26
25
24

R22

JS1

R23

JS2

R24

JS3

R25

JS4

MICOM

Function Selecting(9)

SHORT OPEN

JS1 SIMPLE LCD
JS2 132 180
JS3 MILD HIGH
JS4 Heat Pump Cooling Only

Table 9-1

30

DESCRIPTION

It detect Zero Cross part of Trans output voltage, Transistor TR2 is used to put in the Micom.
Detail Driving is as following Fig 11-1.

MICOM

TRANS
OUTPUT

D5

D6

R3

5.6K

12

CC8
103

TR2
KRC102M

12 1

23

21

R5
10K

R6
1K

VCC

31

DETECT POINT

H

The
Number
31 of
Micom
terminal

AC18V

L

Fig 11-1

Zero Crossing Detect(11)

31

DESCRIPTION

There are one Stepping Motor for Flap (up and down) and it is used 4 face Drive Method.
It is driving as following Fig 12-1. (Ring Count Method of 8 Status)

Ø 4

Ø 3

Ø 2

Ø 1

B

+

6

5

4

3

2

1

12V

IC4

KID65004

CN11

9

MICOM

10
11

12

M1

FOR SWING

Fig 12-1

(Normal Rotating) (Reversed Rotating)

Stepping Motor Driving(12)

Ø 4

Ø 3

Ø 2

Ø 1

32

MICOM

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21

VDD

(XTOUT)P22

(XTIN)P21

(INT5/STOP)P20

P17
P16

(TC2)P15

(PPG)P14

(DVO)P13

(INT2/TC1)P12

(INT1)P11

(INTO)P10

(AIN7)P67
(AIN6)P66
(AIN5)P65
(AIN4)P64
(AIN3)P63
(AIN2)P62
(AIN1)P61
(AIN0)P60

VAREF

P77(HSO)
P76(HSCK)
P75(SO)
P74(SI)
P73(SCK)
P72(PDO/PWM)
P71(INT4)
P70(INT3/TC3)
P07
P06
P05
P04
P03
P02
P01
P00
TEST
RESET
XIN
XOUT
(VASS)VSS

Display Output

Key Input

Compressor Heater Driving

Outdoor Unit Motor Driving
Buzzer Driving
Remocon Input
Indoor Unit Motor Driving
Zero Crossing Detect
Display Driving

Fuction Select

Temperature Sensor Input

Stepping Motor

Compressor Relay Driving

Auto Swing Driving

4-way Valve Driving

Reset Circuit

Oscillation

42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22

33

DARLINGTON ARRAYS (KID65004)

VOLTAGE REGULATOR (KIA7805AP-5VDC)

VOLTAGE REGULATOR (KIA7812AP-12VDC)

IN1 1 16 OUT 1

IN2 2 15 OUT 2
IN 3 3 14 OUT 3
IN 4 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

COMMON

10.5K‰

7.2K‰
3K‰

OUTPUT

GND

INPUT

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

(Equivalent Ciircuit)

34

RESET IC (KIA 7042P)

KIA70

42P

OUTLINE

INPUT

GROUND
OUTPUT

VCC

1

3

2

OUT

GND

35

6. REFRIGERANT CYCLE

SERVICE VALVE

FILTER

COMPRESSOR

HIGH PRESSURE SWITCH

FAN

INDOOR
HEAT EXCHANGER

M

DISTRIBUTER

CAPILLARY TUBE

UNION

OUTDOOR
HEAT EXCHANGER

INDOOR UNIT OUTDOOR UNIT

M

Note) If the pipe length exceeds the standard length, add 30g of refrigerant per extra meter.

Contents

Model Name

Cooling Heating

Capillary tube(내경×L×수량)

IDØ1.4 x 1000mm(6.0l/min) x 5EA ODØ2.0 x 250mm

Charge Quantity 2000 g

36

7. TROUBLE SHOOTING

Outdoor unit does

not run?(note. 1)

Does

the compressor run

normally?

Indoor unit does

not run(note 1)

Check the failure
code according to
the self diagnostic

(note 2)

Is the unit

display

mormal?

check the failure

code according to

the self-diagonostic

(note 2)

Normal

check the

connecting

point of

magnetic

contactor

YES

YES

YES

YES

NO

NO

YES

Trouble

Is the power

applied to the

unit

Is the

power normal?

check the voltage between

L & N of terminal

block

press the power ON/OFF

button on remote controller

Does the

beeper beep two

times?

Is the display

all off?

• Check the connector on display
PCB connected to control PCB

• Check the display PCB itself

Check power supply mains

or interconnection wires

Check the wiring of indoor

Does

control PCB

status LED repeat one

second "on and

off"?

• control PCB fault

• Micom or reset

IC fault

• Check the remote signal receiver

• Check the connection between signal

receiver and control PCB

YES

NO

NO

NO

NO

YES

YES

YES

YES

YES

NO

NO

NO

Is the

unit display

normal?

37

The power is applied to the unit

Check the voltage between and

of terminal block

N

L

Check the

Breaker or Fuse

Self Diagnostic

function is ON

Check according to

self Diagnostic function

Control P.C.B defect

Check the indoor unit display

is the display all off?

Press the ON/OFF switch of

Remote Control

Is the indoor unit display all off?

Pull out the power plug

and then insert the power plug

after 5 second

Control P.C.B is normal

Recheck from the beginning

Rating voltage more than 90%

Rating voltage

under 90%

No No

No

Yes

Yes

1

Neither Indoor Unit nor Outdoor Unit Runs

38

2

Outdoor Unit Runs but Indoor Unit Do Not Run

Check rotation of indoor fan

Rotate indoor fan by hand

Check input Voltage of Fan

Motor connector at power P.C.B

Check the winding resistance of

Indoor unit fan motor

Check the fan motor capacitor

Check the connecting wire of

indoor fan motor

Run again

Check the Fan Motor

bearing and fan

Check the power P.C.B.

The circuit for triac control

Change of fan motor

NO

Rating voltage

under 90%

Open or short

YES

Rating Voltage more than 90%

Normal

39

3

Outdoor Fan Do Not Run

Check the voltage between and

of indoor unit terminal

N

L

Check the voltage between and

of outdoor unit terminal

N

L

Check the voltage between and

of outdoor unit terminal

2

L

Check outdoor fan motor individually

Check the

connecting wire

Check the

connecting wire

Check the wiring

and voltage

within doors

Rating voltage

under 90%

Rating voltage

under 90%

Rating voltage

under 90%

40

4

Only Compressor Do not Run

- Check the following at cooling mode

Check the voltage between and

of indoor unit terminal

Y

N

Check the voltage between and

of outdoor unit terminal

Y

N

Check the magnetic contactor

Check the wiring of outdoor unit

Check the compressor

(Check the winding resistance)

Check the compressor capacitor

Check the connecting

wire between indoor

and outdoor.

Change the magnetic

contactor.

Change the

compressor.

Check the control 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

5

REMOTE CONTROLLER ASSMBLY FUNCTIONAL TEST METHOD

TEST ST ART

Power Supply

Select ON/OFF button

Is Display at the

beginning ON?

Select Mode button

Is it normal?

Select FAN SPEEDbutton

No

No

No

Power supply again

Is Display at the

beginning ON?

Yes

ERROR

No

Check the Following
BA TTER Y SPRING
MICOM
PCB
LCD

Is it normal?

Select FAN DIR. button

Is it normal?

Is display at the

begining ON?

Select TEMP. Button (▲,▼)

Is it normal?

No

▲

( ▼ )

No

No

(Whenever you selectted Temp.
Button, it is changed by 1°C (18~32°C)

No

ERROR

ERROR

ERROR

ERROR

Select ON/OFF button

41

42

(0.5~24 HOUR)

ERROR

No

Select TIMER ON Button

Select Timer Enter Button

Select CANCEL Button

Select ON/OFF Button

Select OFF (Timer) Button

Select SLEEP Button

Select SLEEP Button

TEST OK!

Is LCD display OFF?

Is it normal

display?

TIMER

Is all display OFF?

Is it normal?

SLEEP MODE

Display ON?

Is display at the

beginning ON?

ERROR

No

ERROR

No

ERROR

No

ERROR

No

ERROR

No

ERROR

No

8. EXPLODED DIAGRAM

1

INDOOR UNIT

44

NO Part Code Part Name Quantity Remarks

1 3100090100 ASSY CABNET BODY 1
2 3100042301 BASE MOTOR ASSY 1
3 3100602801 BRACKET PAN DRAIN 1
4 3108008600 MOTOR IDU 1
5 3101501900 CUSHION MOTOR 3
6 3106600210 SCROLL HOUSING 1
7 3106903100 CAPACITOR MOTOR IDU 1
8 3100025000 BLOWER ASSY 1

9 3105200300 WASHER STOPPER 1
10 3100301600 BASE 1
11 3101501100 CUSHION BASE 4
12 3100503901 BOX CONTROL 1
13 3104398800 ASSY MAIN PCB 1
14 5EPK560120 TRANS 1
15 3100042501 PAN DRAIN ASSY 1
16 3100042603 EVAPORATOR ASSY 1
17 3100042802 PIPE DISCHARGE ASSY 1
18 3100042903 PIPE SUCTION ASSY 1
19 3105100400 SPRING SENSOR 1
20 3102707930 HARNESS COIL SENSOR 1
21 3101402700 COVER EVAP. L 1
22 3100048310 ASSY COVER EVAP. R 1
23 3100043000 COVER EVAP. TOP ASSY 1
24 3107000400 CLIP THERMO 1
25 3100087200 COVER HOUSING ASSY 1
26 3104202700 PANEL CONTROL 1
27 3105501800 WINDOW 1
28 3104301010 ASSY CONTROL PCB 1
29 3103401510 KNOB SELECTION 1
30 3103401610 KNOB POWER 1
31 3100090620 ASSY PANEL FRONT 1
32 3100604700 BRACKET FRONT L 1

45

NO Part Code Part Name Quantity Remarks

33 3100604800 BRACKET FRONT R 1
34 3102201600 FRAME DISCHARGE 1
35 310P40086E SWING MOTOR ASSY 1
36 3108005300 MOTOR STEPPING 1
37 3101101300 CASE MOTOR 1
38 3100702100 BUSHING MOTOR 1
39 3106501430 BLADE HORIZONTAL 1 5
40 3106501530 BLADE HORIZONTAL 2 1
41 3107801000 LINK GUIDE R 1
42 3107802200 LINK M 1
43 3106700100 CAM 1
44 3106301100 BAR VERTICAL 1
45 3106503000 BLADE VERTICAL 6
46 3101203400 PUSH MOUNT TIE 2
47 3101408000 COVER BOX CONTROL 1
48 3100090200 ASSY COVER TOP 1
49 3102403720 GRILLE SUCTION 1
50 3102500901 GUIDE FILTER L 1
51 3102501001 GUIDE FILTER R 1
52 3107900100 MAGNET 4
53 3104504700 PLATE MAGNET 8
54 3100056510 FILTER AIR ASSY 1
55 3108912340 TERMINAL BLOCK 1

2

OUTDOOR UNIT

47

NO Part Code Part Name Quantity Remarks

1 3100041704 BASE PAN PAINT ASSY 1

2 3107103000 COMPRESSOR ASSY 1

3 3107103200 CUSHION COMP 4

4 7400208411 WASHER PLAIN 4

5 7392801211 NUT LOCK 4

6 3102800300 CRANKCASE HEATER 1

7 3100031223 CONDENSER ASSY 1

8 3102402100 GRILLE COND 1

9 3100041100 GUIDE POST P/T ASSY 1
10 3100041201 BRK SERVICE P/TAS 1
11 3105401300 SERVICE VALVE G 1
12 3105401200 SERVICE VALVE L 1
13 3106002300 BOLT HEX 4
14 3100086810 PIPE REVERSING ASSY 1
15 3100079310 PIPE FILTER ASSY 1
16 3101407900 COMP COVER 1
17 3100031702 PLT PARTITION ASSY 1
18 3104201601 PANEL CONTROL 1
19 3108912340 TERMINAL BLOCK 1
20 5SC0202700 POWER RELAY 1
21 3109508000 CAPACITOR DUAL 1
22 3105300400 SUPPORT MOTOR 1
23 3108008500 MOTOR ODU 1
24 3101802001 FAN PROPELLER 1
25 3100031400 CABINET FRONT P/T AS 1
26 3100031500 CABINET SIDE P/T AS 1
27 3100041400 PANEL TOP ASS’Y1
28 3102102000 GRILLE DISCHARGE 1
29 3101402500 COVER SERVICE 1

DAEWOO ELECTRONICS CO., L TD.

686, AHYEON-DONG MAPO-GU SEOUL, KOREA
C.P.O. BOX 8003 SEOUL, KOREA
TELEX: DWELEC K28177-8
CABLE: “DAEWOOELEC”
FAX: [phone]
TEL: [phone]~9

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

PRINTED DATE: APR.1999