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Split air conditioner
Wall mounted Type
Service manual
R22 SERIES
Model: DSB-077LH
DSB-097LH
DSB-127LH
DSB-187LH
DSB-247LH
CONTENTS
P
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
1
SERVICE AND MAINTENANCE
Air Conditioner no use for a long time. Want to use the Air Conditioner
1 Start fan only for 3-4 hours to comple-
tely dry the inside of the indoor unit.
1 Clean filters and replace them to origi-
nal position.Clean indoor unit with soft
Set COOL mode or HEAT mode, clothe.
and select the highest setting tempera- Do not use gasoline, benzene, thinner,
ture, then fan turns. grinding powder, detergent,insecticide
etc. to clean units as they can hurt the
units.
ION
OPERAT
FAN
2 Turn off air conditioner, unplug the
power plug. Otherwise, the accumul-
ated dirt may cause fire.
2 Inlets and outlets of indoor and outdo-
or units shall not be covered/blocked.
3 Take the batteries out of the remote
controller.
3 Ground wire shall not be loose.
Put in batteries, and plug the power
plug.
2
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. Clean deodorization filters and air cleaner.
1 Take out filters. 1 Take out filters first, then take out
deodorization filter and air cleaner.
2 Clean filters with a vacuum cleaner 2 Clean deodorization filter, air clean-
or by typing them gently. ( If they are er with warm water below 45 C
very dirty, wash them in warm water dissolved with neutral scouring agent.
below 45 C dissolved with neutral
scouring agent.)
3 Clean filters with clean water, then 3 Clean filters with clean water, then
dry them in cool air. dry them in cool air.
4 Insert them at original position, then 4 Insertdown andoriginalfront panel.then
push
them at
close
position,
push down and close front panel.
3
PERFORMANCE PARAMETERS
DSB-077LH DSB-097LH
Model
indoor outdoor indoor outdoor
Function heat pump type heat pump type
Power 220-240V~, 50Hz 220-240V~, 50Hz
Rated cooling/heating capacity (W) 2000/2400 2500/2800
Standard input power(W) 750(cool)/730(heat) 900(cool)/850(heat)
Standard input current(A) 3.5(cool)/3.4(heat) 4.2(cool)/3.9(heat)
Air flow volume(m 3 /h) 300 400
Dehumidifying capacity (L/h)
difying 1.0 1.2
Protection class I
Water-proof IP20(Indoor) IP24(Outdoor)
Climate type T1
Refrigerant (R22) charge amount(g) 560 720
Noise dB(A) 31 45 38 47
Net weight (Kg) 10 26 10 30
Dimension(mm)WXHXD 800x290x183 665x500x295 800x290x183 830x500x310
DSB-077LH DSB-097LH
Model
indoor outdoor indoor outdoor
Function Cool only type Cool only type
Power 220-240V~, 50Hz 220-240V~, 50Hz
Rated cooling capacity (W) 2000 2500
Standard input power(W) 740 880
Standard input current(A) 3.4 4.0
Air flow volume(m 3 /h) 300 400
Dehumidifying capacity (L/h) 1.0 1.2
Protection class I
Water-proof IP20(Indoor) IP24(Outdoor)
Climate type T1
Refrigerant (R22) charge amount(g) 550 720
Noise dB(A) 31 45 37 48
Net weight (Kg) 10 25 10 28
Dimension(mm)WXHXD 800x290x183 665x500x295 800x290x183 830x500x310
NOTICE 1 The indicated noise value is from laboratories test before leaving factory.
2 The rated cooling capacity and rated heating capacity value is tested under below conditions
cooling operation indoor 27 C(DB) 19 C(WB) outdoor 35 C (DB) 24 C(WB)
heating operation indoor 20 C(DB) 15 C (WB) outdoor 7 C (DB) 6 C(WB)
3 All above should be changed without notice.There are latest and accurate specifications on the name plate of
your air conditioner.
4 Working temperature range:
Maximum cooling Minimum cooling Maximum heating Minimum heating
Indoor side DB/WB( C) 32/23 21/15 27/-- 20/--
Outdoor side DB/WB( C) 43/26 21/15 24/18 -5/-6
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.
4
PERFORMANCE PARAMETERS
DSB-127LH DSB-187LH DSB-247LH
Model
indoor outdoor indoor outdoor indoor outdoor
Function heat pump type heat pump type heat pump type
Power 220-240V~, 50Hz 220-240V~, 50Hz 220-240V~, 50Hz
Rated cooling/heating capacity (W) 3500/4000 5100/5700 6800/7500
Standard input power(W) 1300(cool)/1380(heat) 1960(cool)/2000(heat) 2500(cool)/2590(heat)
Standard input current(A) 6.2(cool)/6.6(heat) 9.0(cool)/9.2(heat) 12.1(cool)/12.6(heat)
Air flow volume(m /h) 3 450 750 1100
Dehumidifying capacity (L/h) 1.6 2.5 3.3
Protection class I
Water-proof IP20(Indoor) IP24(Outdoor)
Climate type T1
Refrigerant (R22) charge amount(g) 1120 1650 2350
Noise dB(A) 40 48 43 55 50 58
Net weight (Kg) 11 37 14.5 46 15 65
Dimension(mm)WXHXD 800x290x183 830x500x310 1020x315x178 860x690x370 1080x330x220 850x870x365
DSB-127LH DSB-187LH DSB-247LH
Model
indoor outdoor indoor outdoor indoor outdoor
Function Cool only type Cool only type Cool only type
Power 220-240V~, 50Hz 220-240V~, 50Hz 220-240V~, 50Hz
Rated cooling capacity (W) 3500 5100 6800
Standard input power(W) 1300 1960 2500
Standard input current(A) 6.1 9.0 12.1
Air flow volume(m 3 /h) 460 750 1100
Dehumidifying capacity (L/h) 1.6 2.5 3.3
Protection class I
Water-proof IP20(Indoor) IP24(Outdoor)
Climate type T1
Refrigerant (R22) charge amount(g) 1100 1600 2300
Noise dB(A) 39 48 43 55 50 58
Net weight (Kg) 11 35 14.5 45 15 63
Dimension(mm)WXHXD 800x290x183 830x500x310 1020x315x178 860x690x370 1080x330x220 850x870x365
NOTICE 1 The indicated noise value is from laboratories test before leaving factory.
2 The rated cooling capacity and rated heating capacity value is tested under below conditions
cooling operation indoor 27 C(DB) 19 C(WB) outdoor 35 C (DB) 24 C(WB)
heating operation indoor 20 C(DB) 15 C (WB) outdoor 7 C (DB) 6 C(WB)
3 All above should be changed without notice.There are latest and accurate specifications on the name plate of
your air conditioner.
4 Working temperature range:
Maximum cooling Minimum cooling Maximum heating Minimum heating
Indoor side DB/WB( C) 32/23 21/15 27/-- 20/--
Outdoor side DB/WB( C) 43/26 21/15 24/18 -5/-6
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.
5
CONTROLS SPECIFICATION
1 ABBREVIATION
Ts: Setting Temperature
Tr: Room Temperature
Ti: Indoor defrost sensor temperature
To: Outdoor defrost sensor temperature
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 C cool operation is terminated. Compressor and outdoor fan are
turned off.
The range of Ts is 16-31 C
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 C, indoor fan increase
to high speed, when Ti -1C for 1 minute continuously, compressor and outdoor fan are
turn off , indoor fan increases to high speed . When Ti 8 C 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.
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 Cooling only type Heat pump type
Temperature (RT) Mode PRE-SET Temperature Mode PRE-SET Temperature
above 26 C 24 C 24 C
Cool Cool
25-26 C RT-2 RT-2
23-25 C Dry RT-2 Dry RT-2
below 23 C Heat 26 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.
6
CONTROLS SPECIFICATION
DRY MODE
If Tr 15 C , dry operation is activated. Compressor and outdoor fan are
turned on interval.
If Tr 23 C ,. Compressor and outdoor fan are operating in sequence as follows:
See A of fig1 If Tr<23 C Compressor and outdoor fan are operating in sequence
as follows: see B of FIG1.
Tr 23 C Tr<23 C
1min 1min 1min 1min
INDOOR FAN 8mins 2mins 3mins 2mins 4mins
3mins 8mins 4mins
COMPRESSOR
OUTDOOR FAN B
A
Fig.1
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 C , heat operation is terminated. Compressor and outdoor fan are
turned off.
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 C , 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 C 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.
15 C
OPT -4C
COMPRESSOR
4WV 30S
30S 15S
OUTDOOR FAN 15S
DE-ICE MAX 10 MINS
INDOOR FAN
7
CONTROLS SPECIFICATION
HIGH PRESSURE PROTECTION
If Ti > 50 C , the outdoor fan is turned off. After that, if Ti < 47 C , the system will
start again.
If Ti > 63 C , the compressor is turned off. After that, if Ti < 50 C , the system will
start again.
Compressor OFF
Outdoor Fan OFF
(High pressure protection)
Temp decreasing 63 C
Compressor ON
Outdoor Fan OFF
(High pressure protection)
Compressor ON
Outdoor Fan OFF 50 C
47 C Compressor ON
Outdoor Fan ON Temp Increasing
Compressor ON
Normal Operation zone
Outdoor Fan ON
Normal Operation zone
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 C in first hours, will
increase 2 C in second hours and will operation as the temperature
In heat mode, after sleep mode is set, Ts will decrease 2C in first hours, will
increase 2 C in second hours and will operation as the temperature
Changing of operation mode will cancel sleep mode.
C
Ts
Ts-1
Ts-2
Time
HEAT MODE
COOL MODE
1 HR 1 HR 1 HR
Ts+2
Ts+1
Ts
8
CONTROLS SPECIFICATION
AUTO FAN SPEED
In cool mode, if Tr-Ts < 0C, indoor fan is run at low speed.
If 0 C 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 C If Tr-Ts>4 C indoor fan is run at high speed.
HIGH SPEED
MEDIUM SPEED
LOW SPEED
Tr-Ts
0C 2C 4C
In heat mode, if Tr-Ts < 1C, indoor fan is run at low speed.
If 1 C 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 C If Tr-Ts>5 C indoor fan is run at high speed.
HIGH SPEED
MEDIUM SPEED
LOW SPEED
Tr-Ts
0C 2C 4C
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.
9
CONTROLS SPECIFICATION
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 Setting temperature Fan speed Deflector
COOL 24 C High Swing
HEAT 24 C High Swing
In the first 30 minutes operation, the compressor don't stop ,indoor fan hold high speed. After
30 minutes, emergency run operation start.
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.
10