Daewoo DSB-092LHG User manual

Service Manual
Split System
Air Conditioner
Model: DSB-092LHG
DSB-242LHG
S/M No. : R1A1G0A004
MAR. 2006
✔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
S/M No. : SB092LH001

CONTENTS
P
Contents 1
Service and Maintenance 2
Performance Parameters 4
Controls Specification 6
Operation of air Conditioner 11
Installation Explanations 15
Disassembly and reassembly 23
Troubleshooting 31
Exploded Views and Parts List 33
Wiring Diagram 42

1
1
3
3
2
2
1
1
3
3
2
2
Air Conditioner no use for a long time.
Start fan only for 3-4 hours to comple-
tely dry the inside of the indoor unit.
Set COOL mode or HEAT mode,
and select the highest setting tempera-
ture, then fan turns.
Turn off air conditioner, unplug the
power plug. Otherwise, the accumul-
ated dirt may cause fire.
FAN OPERATION
Take the batteries out of the remote
controller.
Want to use the Air Conditioner
Clean filters and replace them to origi-
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.
Inlets and outlets of indoor and outdo-
or units shall not be covered/blocked.
Ground wire shall not be loose.
Put in batteries, and plug the power
plug.
SERVICE AND MAINTENANCE

11
1
4
4
3
3
2
2
1
1
4
4
3
3
2
2
Filters should be cleaned once every two weeks.
Take out filters.
Clean filters with a vacuum cleaner
or by typing them gently. ( If they are
very dirty, wash them in warm water
below 45 dissolved with neutral
scouring agent.)
Clean filters with clean water, then
dry them in cool air.
Insert them at original position, then
push down and close front panel.
Clean deodorization filters and air cleaner.
Take out filters first, then take out
deodorization filter and air cleaner.
Clean deodorization filter, air clean-
er with warm water below 45
dissolved with neutral scouring agent.
Clean filters with clean water, then
dry them in cool air.
Insert them at original position, then
push down and close front panel.
Deodorization filter, Air cleaner, Filters must be cleaned termly.
Open front panel only after air conditioner stops completely.
C
C
SERVICE AND MAINTENANCE

PERFORMANCE PARAMETERS
3
1
4
2
5
6
7
The indicated noise value is from laboratories test before leaving factory.
The rated cooling capacity and rated heating capacity value is tested under below conditions
All above should be changed without notice.There are latest and accurate specifications on the name plate of
your air conditioner.
NOTICE
cooling operation
heating operation
indoor
indoor
outdoor
outdoor
27
20
(DB)
(DB)
35
7
(DB)
(DB)
19
15
(WB)
(WB)
24
6
(WB)
(WB)
C
C
C
C
C
C
C
C
Working temperature range:
If air conditioner working voltage exceeds 230V 10%.it operates abnormally.
Wiring diagram of air conditioner(indoor unit/outdoor unit)are attached to the unit.
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.
C
Indoor side DB/WB( )
Maximum cooling Minimum cooling
Maximum heating Minimum heating
C
Outdoor side DB/WB( )
32/23 21/15 20/--
27/--
24/1821/1543/26 -5/-6
indoor outdoor
heat pump type
220-240V , 50Hz
~
Rated cooling/heating capacity (W)
Dehumidifying capacity (L/h)
Dimension(mm)WXHXD
3
Air flow volume(m /h)
Protection class
Net weight (Kg)
Water-proof
Noise dB(A)
Climate type
Function
Model
Power
difying capacity (L/h)
Refrigerant (R22) charge amount(g)
Dimension(mm)WXHXD
Standard input current(A)
3
Air flow volume(m /h)
Standard input power(W)
Net weight (Kg)
Noise dB(A)
Climate type
IP20(Indoor) IP24(Outdoor)
I
T1
2500/2800
400
1.2
30
47
900(cool)/850(heat)
4.2(cool)/3.9(heat)
720
38
10
800x290x183 830x500x310
DSB-092LHG

PERFORMANCE PARAMETERS
3
1
4
2
5
6
7
The indicated noise value is from laboratories test before leaving factory.
The rated cooling capacity and rated heating capacity value is tested under below conditions
All above should be changed without notice.There are latest and accurate specifications on the name plate of
your air conditioner.
NOTICE
cooling operation
heating operation
indoor
indoor
outdoor
outdoor
27
20
(DB)
(DB)
35
7
(DB)
(DB)
19
15
(WB)
(WB)
24
6
(WB)
(WB)
C
C
C
C
C
C
C
C
Working temperature range:
If air conditioner working voltage exceeds 230V 10%.it operates abnormally.
Wiring diagram of air conditioner(indoor unit/outdoor unit)are attached to the unit.
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.
C
Indoor side DB/WB( )
Maximum cooling Minimum cooling
Maximum heating Minimum heating
C
Outdoor side DB/WB( )
32/23 21/15 20/--
27/--
24/1821/1543/26 -5/-6
Rated cooling/heating capacity (W)
Dehumidifying capacity (L/h)
Dimension(mm)WXHXD
3
Air flow volume(m /h)
Protection class
Net weight (Kg)
Water-proof
Noise dB(A)
Climate type
Function
Model
Power
T1
Refrigerant (R22) charge amount(g)
Standard input current(A)
Standard input power(W)
IP20(Indoor) IP24(Outdoor)
I
T1
220-240V , 50Hz
~
heat pump type
indoor outdoor
15
1100
12.1(cool)/12.6(heat)
2500(cool)/2590(heat)
6800/7500
2350
65
50 58
3.3
DSB-242LHG
850x870x365
1080x330x220

CONTROLS SPECIFICATION
1
1
2
2
ABBREVIA TION
Ts: Setting Temperature
Tr: Room T emperature
Ti: Indoor defrost sensor temperature
To: Outdoor defrost sensor temperature
OPERA TION 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 T r T s-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.
C
C
Indoor de-ice
This process is checked by the indoor defrost sensor (T i). 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 T i 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
AUTO CHANGEOVER MODE
Per Room
Temperature (RT)
Cooling only type
Mode PRE-SET Temperature PRE-SET Temperature Mode
24
26
RT-2 RT-2
Cool Cool
Dry RT-2 RT-2
Dry
Heat
Heat pump type
above 26
25-26
23-25
below 23
C 24 C C
C
C
C
C
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.
When this mode is selected, the system will change from AUTO COOL to AUTO
DRY to AUTO HEA T 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 HEA T)
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.
C

Outdoor de-ice
After 40 minutes of continuous heating operation, if To -4 , the outdoor de-ice
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
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
C
4WV
COMPRESSOR
30S 15S
MAX 10 MINS
HEAT MODE
If Tr < Ts, heat operation is activated. Compressor and outdoor fan are turned on.
If Tr Ts + 1 , heat 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 delay for 3 minutes before it is turned on or off.
C
C
Compressor will delay for 3 minutes before it is turned on or off.
HEAT MODE
OPT -4
15C
C
DE-ICE
INDOOR FAN
OUTDOOR FAN
30S 15S
DRY MODE
If Tr 15 , dry operation is activated. Compressor and outdoor fan are
turned on interval.
C
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
as follows: see B of FIG1.
C
C
Tr 23 Tr 23<
C C
OUTDOOR FAN
INDOOR FAN
COMPRESSOR
8mins 3mins 4mins
1min
2mins 3mins
8mins
1min
2mins 4mins
1min 1min
Fig.1
AB
CONTROLS SPECIFICATION

TIMER
Timer off can only be set when the system is operating.
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
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
Changing of operation mode will cancel sleep mode.
C
C
C
HIGH PRESSURE PROTECTION
If Ti > 50 , the outdoor fan is turned off. After that, if Ti < 47 , the system will
start again.
If Ti > 63 , the compressor is turned off. After that, if Ti < 50 , the system will
start again.
C C
CC
Compressor ON
Outdoor Fan OFF
Compressor ON
Outdoor Fan ON
Normal Operation zone
Compressor ON
Outdoor Fan OFF
(High pressure protection)
Compressor OFF
Outdoor Fan OFF
(High pressure protection)
Compressor ON
Outdoor Fan ON
Normal Operation zone
Temp Increasing
Temp decreasing
47 C
50 C
63 C
C
HEAT MODE
COOL MODE
Ts
Ts-1
Ts-2
Ts
Ts+1
Ts+2
1 HR 1 HR 1 HR
Time
C
CONTROLS SPECIFICATION

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 :
If a command is received, the system will respond with a beep.
BUZZER
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.
AUTO FAN SPEED
C C
C
C
0
Tr-Ts
HIGH SPEED
MEDIUM SPEED
LOW SPEED
C 2C 4C
C
C
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.
C C
C
C
0
Tr-Ts
HIGH SPEED
MEDIUM SPEED
LOW SPEED
C 2C 4C
C
C
CONTROLS SPECIFICATION