Daewoo DSB-077, DSB-097, DSB-127LH, DSB-187LH, DSB-247LH Service Manual

Split air conditioner
Wall mounted Type

Service manual

R

22 SERIES

Model:

DSB-077LH
DSB-097LH
DSB-127LH
DSB-187LH
DSB-247LH

CONTENTS

PP

Contents.....................................................................................1

Service and Maintenance of the Air Conditioner........................2

Performance Parameters.................................................. ........4

Control specication....................................................................5

Operation of air conditioner......................................................10

Installation Explanations..........................................................14

Disassembly and reassembly........................ ..........................14

Troubleshooting.......................................................................29

Exploded views and part list..........................................................14

Wiring diagram.........................................................................40

.

.

11

SERVICE AND MAINTENANCE

Air Conditioner no use for a long time.

Start fan only for 3-4 hours to comple-

1

1

tely dry the inside of the indoor unit.
Set COOL mode or HEAT mode,
and select the highest setting tempera­ture, then fan turns.

TION

FAN OPERA

Turn off air conditioner, unplug the

2

2

power plug. Otherwise, the accumul­ated dirt may cause fire.

Want to use the Air Conditioner

Clean filters and replace them to origi-

1

1

nal position.Clean indoor unit with soft
clothe.
Do not use gasoline, benzene, thinner,
grinding powder, detergent,insecticide
etc. to clean units as they can hurt the
units.

Take the batteries out of the remote

3

3

controller.

Inlets and outlets of indoor and outdo-

2

2

or units shall not be covered/blocked.

Ground wire shall not be loose.

3

3

Put in batteries, and plug the power
plug.

22

SERVICE AND MAINTENANCE

Deodorization filter, Air cleaner, Filters must be cleaned termly.
Open front panel only after air conditioner stops completely.

Filters should be cleaned once every two weeks.

Take out filters.

1

11

Clean filters with a vacuum cleaner

2

2

or by typing them gently. ( If they are
very dirty, wash them in warm water
below 45 dissolved with neutral
scouring agent.)

C

Clean deodorization filters and air cleaner.

Take out filters first, then take out

1

1

deodorization filter and air cleaner.

Clean deodorization filter, air clean-

2

2

er with warm water below 45
dissolved with neutral scouring agent.

C

33

3

Clean filters with clean water, then

3

dry them in cool air.

Insert them at original position, then

4

4

push down and close front panel.

Clean filters with clean water, then

3

3

dry them in cool air.

Insert them at original position, then

4

4

push down and close front panel.

PERFORMANCE PARAMETERS

Model

Function

Power

Rated cooling/heating capacity (W)

Standard input power(W)

Standard input current(A)

3

Air flow volume(m /h)

Air flow volume(m /h)

Dehumidifying capacity (L/h)

Refrigerant (R22) charge amount(g)

Dehumidifying capacity (L/h)

Dehumidifying capacity (L/h)

Refrigerant (R22) charge amount(g)

difying capacity (L/h)

Protection class

Water-proof

Climate type

Climate type

Noise dB(A)

Noise dB(A)

Net weight (Kg)

Net weight (Kg)

Dimension(mm)WXHXD

Dimension(mm)WXHXD

Model

Model

Function

Function

Power

Power

Rated cooling capacity (W)

Standard input power(W)

Standard input current(A)

Air flow volume(m /h)

Air flow volume(m /h)

Protection class

Protection class

Water-proof

Water-proof

Climate type

Climate type

Noise dB(A)

Noise dB(A)

Net weight (Kg)

Net weight (Kg)

Dimension(mm)WXHXD

Dimension(mm)WXHXD

3

3

3

indoor outdoor

heat pump type

220-240V , 50Hz

750(cool)/730(heat)

3.5(cool)/3.4(heat)

31

10 26

800x290x183

indoor outdoor

Cool only type

220-240V , 50Hz

10 25

800x290x183

DSB-077LH DSB-097LH

indoor outdoor

heat pump type

~

2000/2400

300

1.0

IP20(Indoor) IP24(Outdoor)

T1

560

45

665x500x295

DSB-077LH DSB-097LH

~

2000

740

3.4

300

1.0

IP20(Indoor) IP24(Outdoor)

T1

550

4531

665x500x295

220-240V , 50Hz

2500/2800

900(cool)/850(heat)

4.2(cool)/3.9(heat)

400

1.2

I

720

38

10

800x290x183

indoor outdoor

Cool only type

220-240V , 50Hz

2500

880

4.0

400

1.2

I

720

37

10

800x290x183

~

830x500x310

~

830x500x310

47

30

48

28

NOTICE

cooling operation

heating operation

3

All above should be changed without notice.There are latest and accurate specifications on the name plate of
your air conditioner.

Working temperature range:

4

Indoor side DB/WB( )

Outdoor side DB/WB( )

5

If air conditioner working voltage exceeds 230V 10%.it operates abnormally.

6

Wiring diagram of air conditioner(indoor unit/outdoor unit)are attached to the unit.

7

If the power cable or connecting cable is damaged ,it must be replaced by the manufacturer or its service agent
or similar qualified person in order to avoid a hazard.

The indicated noise value is from laboratories test before leaving factory.

1
2

The rated cooling capacity and rated heating capacity value is tested under below conditions

indoor

indoor

C

27

(DB)

C

20

(DB)

C

Maximum cooling Minimum cooling

32/23

19

15

C

(WB)

C

(WB)

C

21/15

outdoor

outdoor

Maximum heating

27/--

24/1821/1543/26

35

7

C

C

(DB)

(DB)

Minimum heating

24

6

20/--

-5/-6

(WB)

C

(WB)

C

44

PERFORMANCE PARAMETERS

Model

Function

Power

DSB-127LH DSB-187LH DSB-247LH

indoor outdoor

heat pump type

220-240V , 50Hz

Rated cooling/heating capacity (W)

Standard input power(W)

Standard input current(A)

Air flow volume(m /h)

3

1300(cool)/1380(heat)

6.2(cool)/6.6(heat)

Dehumidifying capacity (L/h)

Protection class

Water-proof

Climate type

Refrigerant (R22) charge amount(g)

Noise dB(A)

Net weight (Kg)

Dimension(mm)WXHXD

40

11

800x290x183

DSB-127LH DSB-187LH DSB-247LH

Model

Function

Power

indoor outdoor

Cool only type Cool only type

220-240V , 50Hz

Rated cooling capacity (W)

Standard input power(W)

Standard input current(A)

3

Air flow volume(m /h)

3

Dehumidifying capacity (L/h)

Protection class

Water-proof

Climate type

Refrigerant (R22) charge amount(g)

Noise dB(A)

Net weight (Kg)

Dimension(mm)WXHXD

39

11

800x290x183

~

3500/4000

450

1.6

1120

830x500x310

~

3500

1300

6.1

460

1.6

1100

830x500x310

indoor outdoor

heat pump type

220-240V , 50Hz

~

5100/5700

1960(cool)/2000(heat)

9.0(cool)/9.2(heat)

750

2.5
I

IP20(Indoor) IP24(Outdoor)

T1

T1

1650

48

37

43

14.5

1020x315x178

55

46

860x690x370

indoor outdoor

220-240V , 50Hz

~

5100

1960

9.0

750

2.5
I

IP20(Indoor) IP24(Outdoor)

T1

T1

1600

48

35

43 55

1020x315x178

4514.5

860x690x370

indoor outdoor

heat pump type

220-240V , 50Hz

~

6800/7500

2500(cool)/2590(heat)

12.1(cool)/12.6(heat)

1100

3.3

2350

50

15

1080x330x220

58

65

850x870x365

indoor outdoor

Cool only type

220-240V , 50Hz

~
6800
2500

12.1

1100

3.3

2300

50 58

6315

1080x330x220

850x870x365

55

NOTICE

cooling operation

heating operation

3

All above should be changed without notice.There are latest and accurate specifications on the name plate of

The indicated noise value is from laboratories test before leaving factory.

1
2

The rated cooling capacity and rated heating capacity value is tested under below conditions

indoor

indoor

27

20

(DB)

C

(DB)

C

19

15

(WB)

C

(WB)

C

outdoor

outdoor

35

7

(DB)

C

(DB)

C

24

6

(WB)

C

(WB)

C

your air conditioner.

Working temperature range:

4

Maximum cooling Minimum cooling

Indoor side DB/WB( )

Outdoor side DB/WB( )

5

If air conditioner working voltage exceeds 230V 10%.it operates abnormally.

6

Wiring diagram of air conditioner(indoor unit/outdoor unit)are attached to the unit.

7

If the power cable or connecting cable is damaged ,it must be replaced by the manufacturer or its service agent

C

C

32/23

21/15

Maximum heating

27/--

24/1821/1543/26

Minimum heating

20/--

-5/-6

or similar qualified person in order to avoid a hazard.

CONTROLS SPECIFICATION

ABBREVIATION

1

1

Ts: Setting Temperature
Tr: Room Temperature
Ti: Indoor defrost sensor temperature
To: Outdoor defrost sensor temperature

2

2

OPERATION OF MAIN BOARD

COOL MODE

If Tr > Ts, cool operation is activated. Compressor and outdoor fan are turned on.
Indoor fan runs at the set speed.

If Tr Ts-1 cool operation is terminated. Compressor and outdoor fan are
turned off.

The range of Ts is 16-31

Indoor fan speed can be adjusted for low, medium, high and auto.Compressor will
be delayed for 3 minutes before it is turned on or off.

Indoor de-ice

This process is checked by the indoor defrost sensor (Ti). If Ti =2 , indoor fan increase
to high speed, when Ti -1 for 1 minute continuously, compressor and outdoor fan are
turn off , indoor fan increases to high speed . When Ti 8 for 5 minutes continuously,
compressor and outdoor are turn on.
de-ice operation is on for more than 8 minutes, system will return to normal operation.

C

C

C

C

C

C

AUTO CHANGEOVER MODE

When this mode is selected, the system will change from AUTO COOL to AUTO
DRY to AUTO HEAT mode according to the room temperature and will run
according to the programmed temperature set points as in the following table.
If the unit is restarted after it is stopped for less than 2 hours, it will resume at the
previously established mode before it was stopped. (i.e. AUTO COOL or AUTO
DRY or AUTO HEAT)
If the unit is restarted after it is stopped for more than 2 hours, it will run in a new
mode according to the room temperature when it is restarted.
During this mode the temperature set point can only be set + or - 2 Deg. C of the
room temperature.

Per Room

Temperature (RT)

above 26

25-26
23-25

below 23

C
C
C

C

Cooling only type

Mode

Cool Cool

Dry RT-2

PRE-SET Temperature PRE-SET Temperature

C C

24
RT-2

Mode

Heat pump type

Dry

Heat

24
RT-2
RT-2

C

26

FAN MODE

Indoor fan runs at the set speed while compressor and outdoor fan are turned off.
Indoor fan speed can be adjusted for low, medium and high.

66

CONTROLS SPECIFICATION

DRY MODE

If Tr 15 , dry operation is activated. Compressor and outdoor fan are

C

turned on interval.

If Tr 23 ,. Compressor and outdoor fan are operating in sequence as follows:
See A of fig1 If Tr<23 Compressor and outdoor fan are operating in sequence

C

C

as follows: see B of FIG1.

INDOOR FAN

8mins

Tr 23

3mins

C C

1min

1min

8mins

4mins

Tr 23<

2mins 3mins

2mins

1min 1min

4mins

COMPRESSOR
OUTDOOR FAN

A

B

Fig.1

HEAT MODE

HEAT MODE

If Tr < Ts, heat operation is activated. Compressor and outdoor fan are turned on.

Compressor will delay for 3 minutes before it is turned on or off.

If Tr Ts + 1 , heat operation is terminated. Compressor and outdoor fan are
turned off.

C

The range of Ts is 16 - 31 .

C

Indoor fan speed can be adjusted for low, medium, high and auto.

Compressor will delay for 3 minutes before it is turned on or off.

Outdoor de-ice

After 40 minutes of continuous heating operation, if To -4 , the outdoor de-ice

C
operation is activated. Compressor is turned off. Indoor fan speed reduces to low
speed. After 30 seconds delay, 4 way value and outdoor fan will be turned off, indoor
fan reduces to low speed, 15 seconds later, the compressor is turned on and indoor fan
turn off for the de-ice operation, if To 15 or 10 minutes has elapsed, the de-ice

C
operation will be terminated. Then, the compressor is turned off. After 30 seconds
delay, 4 way valve and outdoor fan are turned on, 15 seconds later, compressor and
outdoor fan are turned on for return to normal operation, indoor fan is turned on for
return to normal operation also.

C

OPT

15

-4

C

COMPRESSOR

4WV

OUTDOOR FAN

30S

15S

30S

15S

77

DE-ICE

INDOOR FAN

MAX 10 MINS

CONTROLS SPECIFICATION

HIGH PRESSURE PROTECTION

If Ti > 50 , the outdoor fan is turned off. After that, if Ti < 47 , the system will

C C
start again.
If Ti > 63 , the compressor is turned off. After that, if Ti < 50 , the system will

C C

start again.

Compressor OFF
Outdoor Fan OFF
(High pressure protection)

Temp decreasing

Compressor ON
Outdoor Fan OFF
(High pressure protection)

Compressor ON
Outdoor Fan OFF

47

C

Compressor ON
Outdoor Fan ON

Compressor ON
Outdoor Fan ON
Normal Operation zone

Temp Increasing

Normal Operation zone

TIMER

Timer off can only be set when the system is operating.

63

50

C

C

Timer on can only be set when the system is off.

The maximum set time is 12 hours.

Changing of on/off state will cancel timer mode.

SLEEP MODE

In cool mode, after sleep mode is set, Ts will increase 1 in first hours, will
increase 2 in second hours and will operation as the temperature

C

In heat mode, after sleep mode is set, Ts will decrease 2 in first hours, will
increase 2 in second hours and will operation as the temperature

C

Changing of operation mode will cancel sleep mode.

C

Ts

Ts-1

Ts-2

HEAT MODE
COOL MODE

1 HR

Ts+2

1 HR

1 HR

C

C

Time

Ts+1

Ts

88

CONTROLS SPECIFICATION

AUTO FAN SPEED

In cool mode, if Tr-Ts < 0 , indoor fan is run at low speed.
If 0 <Tr-Ts<2 , if indoor fan is running at low speed, there will be
no change in speed , if fan is running at medium speed ,there will be
no change in speed ,if indoor fan is run at high speed ,it will change
to medium speed.
If 2 <Tr-Ts<4 indoor fan keep original speed.
If Tr-Ts>4 indoor fan is run at high speed.

Tr-Ts

In heat mode, if Tr-Ts < 1 , indoor fan is run at low speed.
If 1 <Tr-Ts<3 , if indoor fan is run at low speed, there will be no
change in speed , if fan run at medium speed ,there will be no change
in speed , if indoor fan is run at high speed ,will change to medium
speed .
If 3 <Tr-Ts<5 indoor fan keep original speed.
If Tr-Ts>5 indoor fan is run at high speed.

LOW SPEED

C

C

C

C

C

C

C

C

MEDIUM SPEED

0

C

C

C

C

C

HIGH SPEED

2

C

4

C

HIGH SPEED

99

MEDIUM SPEED

Tr-Ts

LOW SPEED

0

C

2

C

4

C

MANUAL SWING (STEPPING MOTOR)

If the indoor fan is operating, the louver will swing or can be stopped at a preferred
location in any mode. The louver change location follow the order of :

BUZZER

If a command is received, the system will respond with a beep.

CONTROLS SPECIFICATION

3

3

OPERATION OF CONTROL PANEL ON INDOOR UNIT

MANUAL OPERATION BUTTON

Every press of this button will turn the system on or off.

(Cool only type)
Every time the switch is pressed, it changes in sequence of

COOL STOP.

(Heat pump type)
Every time the switch is pressed, it changes in sequence of

COOL HEAT STOP.

MANUAL run operation procedure as the following:

Mode

COOL

HEAT

In the first 30 minutes operation, the compressor don't stop ,indoor fan hold high speed. After
30 minutes, emergency run operation start.

Setting temperature

C

24

C

24

Fan speed

High

High

Deflector

Swing

Swing

SYSTEM LED LIGHT

When system is operating, the RUN light is on. When system is off, the light is off.

When sleep mode is operating, the SLEEP light is on. When sleep mode is off,
the light is off.
When timer is operating, the TIME light is on. When time is over, the light is off.

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