Daewoo DSB-070L User manual

Service Manual
Split System Air
Conditioner
Model: DSB-070L
DSB-091L
DSB-121L
DAEWOO ELECTRONICS CO., LTD.
✔ 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 (http://svc.dwe.co.kr).
S/M No. :DSB070L010

CONTENTS
1. Specifications..........................................................................................................2
2. Outline and Dimensions.........................................................................................5
3. Operation.................................................................................................................9
4. Wiring Diagram.....................................................................................................22
5. Refrigerant Cycle..................................................................................................24
6. Control Block Diagram .........................................................................................25
7. Electric Circuit Diagram........................................................................................26
8. Trouble Shooting...................................................................................................28
9. Key Components of Electronic Circuit.................................................................47
10. Disassembly Instructions .....................................................................................50
1) Indoor Unit........................................................................................................50
2) Outdoor Unit.....................................................................................................52
3) Exploded Diagram (Indoor Unit)......................................................................54
4) Exploded Diagram (Outdoor Unit)...................................................................59
5) Control Box Assembly......................................................................................65
Contents

2
1. SPECIFICATIONS
MODEL DSB-070L
ITEM
Function Cooling
Class T
Power AC 220-240V / 50Hz
Capacity W 2,051
Btu/h 7,000
Dehumidification l/h 0.89
Running Current A 2.9
Power Input W 680
Starting Current A 18
Type Rotary
Model QB 125PL 12B
Capacitor 25µF/370VAC
Indoor Unit Outdoor Unit
Type Cross flow fan Propeller fan
Capacitor 1.0µ F 400VAC 1.8 µF 400VAC
Motor Model Number IC-8417DWKF5A IC-9625DWLF 5A
Control Capillary
Charge Q'ty g 800
Type Flare
OD (Liquid/Suction) in(mm) 1/4 (6.35) 1/2 (12.7)
Dimensions (W x H x D) mm 750 x 245 x 174 654 x 549 x 256
Net Weight kg 7.0 34
Electrical
Data
Compressor
Fan
Motor
Refrigerant
(R-22)
Connection
¡DSB-070L

3
MODEL DSB-091L
ITEM
Function Cooling
Class T
Power AC 220-240V / 50Hz
Capacity W 2,637
Btu/h 9,000
Dehumidification l/h 1.15
Running Current A 4.2
Power Input W 920
Starting Current A 21
Type Rotary
Model RBB090A001 QK 164PN12F
Capacitor 25µF / 370VAC 30µF / 370VAC
Indoor Unit Outdoor Unit
Type Cross flow fan Propeller fan
Capacitor 1.0µ F 400VAC 1.8µF 400VAC
Motor Model Number IC-8417DWKF5A IC-9630DWLF5A
Control Capillary
Charge Q'ty g 1,000
Type Flare
OD (Liquid/Suction) in(mm) 1/4 (6.35) 1/2 (12.7)
Dimensions (W x H x D) mm 750 x 245 x 174 654 x 549 x 256
Net Weight kg 7.0 34
Electrical
Data
Compressor
Fan
Motor
Refrigerant
(R-22)
Connection
¡DSB-091L

4
MODEL DSB-121L
ITEM
Function Cooling
Class T
Power AC 220-240V / 50Hz
Capacity W 3,507
Btu/h 12,000
Dehumidification l/h 1.53
Running Current A 5.7
Power Input W 1,250
Starting Current A 34
Type Rotary
Model RCB 120A001
Capacitor 25µF / 400VAC
Division Indoor Unit Outdoor Unit
Type Cross flow fan Propeller fan
Capacitor 1.0µ F 400VAC 3.5µF 400VAC
Motor Model Number IC-8428DWKG7C IC-9430DWLC5B
Control Capillary
Charge Q'ty g 1,300
Type Flare
OD (Liquid/Suction) in(mm) 1/4 (6.35) 1/2 (12.7)
Dimensions (W x H x D) mm 925 x 285 x 194 666 x 552 x 264(Before)
654 x 549 x 256(After)
Net Weight kg 9.7 34
Electrical
Data
Compressor
Fan
Motor
Refrigerant
(R-22)
Connection
¡DSB-121L

5
750
Plate Mounting
REMOCON
Connecting Pipe
Grille Insert
245
REMOTECONTROLLER
Frame Grille
Body
Plate Mounting
174
2. OUTLINE AND DIMENSIONS
1
INDOOR UNIT
¡DSB-070L/DSB-091L

6
REMOCON
Filter - L Filter - R
Grille Insert
Frame Grille
Body
Plate Mounting
Connecting Pipe
Plate Mounting
406
194
285
925
REMOTECONTROLLER
¡DSB-121L

7
256
549
654
2
OUTDOOR UNIT
¡DSB-070L/DSB-091L/DSB-121L(After)
Inlet
Inlet
Outlet
Outlet
Foot
Foot Cushion
Handle
Cabinet Side Panel Top Guide Support
Service Valve
Cabinet Front

8
Cabinet SideHandleCabinet Front Foot
264
334
Panel Top Cabinet Back
552
572
Inlet
AIR
Inlet
Outlet
Foot Cushion
Service Valve
666
¡DSB-121L(Before)

9
1
PARTS OF NAME AND FUNCTION
Indoor Unit
3. OPERATION
¡DSB-070L/DSB-091L
REMOTECONTROLLER
Electrostatic Filter
(option)
Deodorizing Filter
(option)
Air Inlet
Remote
Controller
Receiver
Power Plug
Remote Controller
Fan Direction
(Up, Down)
Air Outlet
Antibacterial
Filter
Lamp

10
Indoor Unit
¡DSB-121L
Power Plug
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Electrostatic Filter Deodorizing FilterAir Inlet
Antibacterial
Filter Air Outlet Fan Direction (Up, Down)
Remote Controller
Remote
Controller
Receiver
Lamp
REMOTECONTROLLER

11
¡DSB-070L/DSB-091L
■ Remote Control Signal Receiver
This place is the part to receive the signal if it
receive the signal, you can hear the signal “beep.
“beep. beep.”
■ There is a switch panel at inside of Front
Panel. At the time of operating, open the
Front Panel.
Emergency switch can be used when the remote
controller is lost or Testing.
Remote switch is usually used by remote
controller.
Indoor Unit Display Switch Panel
Timer (Yellow)
Lights during the time
reservation mode.
Quick (Red)
ON (Red)
Lights when the
operation is going on.
Air clean (Green)
EMR. REMOCON

12
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Remote Control Signal Receiver
This place is the part to receive the signal if it
receive the signal, you can hear the signal
"beep, beep".
Timer (Yellow)
Lights during the time
reservation mode.
ON (Red)
Lights when the
operation is
going on.
■There is a switch panel at inside of Front
Panel. At the time of operating, open the
Front Panel.
Air clean (Green) Quick(Red)
Indoor Unit Display Switch Panel
EMERGENCY REMOTE
ON AIR CLEAN QUICK TIMER
Remote switch is usally used by Remote
Controller.
Emergency switch can be used when the remote
controller is lost or testing.
¡DSB-121L

13
Outdoor Unit
¡DSB-070L/DSB-091L/DSB-121L(After)
Air Inlet (Side Back)
Connection Wire
Connecting Pipe
Drain Hose
Air Outlet

14
AIR
Air Inlet (side Back)
Air Outlet
Connection
Wire
Connecting
Pipe
Drain Hose
Outdoor Unit
¡DSB-121L(Before)
NOTE:
How to remove Top Panel
1. Loosen the screw at left and right side.
2. Push the three parts op Front and Back sides like figure orderly.
3. Unhook the locking parts of Top Panel.
The front locking parts
FRONT SIDE BACK SIDE
The back locking parts

14
AIR
Air Inlet (side Back)
Air Outlet
Connection
Wire
Connecting
Pipe
Drain Hose
Outdoor Unit
¡DSB-121L(Before)
NOTE:
How to remove Top Panel
1. Loosen the screw at left and right side.
2. Push the three parts op Front and Back sides like figure orderly.
3. Unhook the locking parts of Top Panel.
The front locking parts
FRONT SIDE BACK SIDE
The back locking parts

15
Name of Each Button
2
REMOTE CONTROLLER
¡DSB-070L/DSB-091L/DSB-121L
MODE
SLEEP
ON/OFF
TIMER
ENTER/
CANCEL
FAN SPEED
TURBO/MILD
Display
Displays information
pertaining to unit.
TURBO/MILD
Press to be colder the unit.
TIMER ENTER/CANCEL Button
Press to enter a timer setting or
to cancel timer setting
TIMER ON/OFF Button
Press to set the unit of 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/Cooling/Fan/Dry)
SLEEP Button
Press to set the unit for
the sleep mode.
FAN DIR.
FAN DIR. Button
Press to select up/down
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
(High " ", Middle " ",
Low " ").
COVER
Slide down to access most
of the remote buttons.
Slide down further to
access the battery
compartment.
AUTO
REMOTE CONTROLLER

16
Replacing Batteries
3
REMOTE CONTROLLER DISPLAY
Open the cover after
pressing the arrow
direction and pulling out.
Put the drycell by ●● + ●● -
direction. Close the cover after pushing into arrow
direction.
123
REMOTE CONTROLLER
+–
+–
REMOTE CONTROLLER
¡DSB-070L/DSB-091L/DSB-121L
MODE Indicators (Auto/Quick/Cool/Fan/Dehumidifier)
Lights to indicate the mode selected.
TIMER Indicators (Include sleep)
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 loreeze.
FAN Indicators
Lights to indicate
the fan speed.
AUTO

17
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
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)
(COOLING)
Desired temperature
COMP (OFF)
-1˚C Temperature
¡Room temperatrue
< setting temperature
Compressor OFF
Room temperature
> setting temperafure
Compressor ON
(
(

18
(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.
Sleep Mode
0 0.5 1.0 HOUR
SET TIME
Desired
Difference
desired temperature
between room
temperature (°C) 0.5°C0.5°C0.5°C
Temperature
Fan Speed (Indoor Unit)
(1) Motor speed (Super high speed, high speed, normal speed, low speed, ultra low speed).
(2) Remote controller setting fan speed. (Auto, L, M, H, Natural)
(3) Relation of operating mode between fan speed.
(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.
FAN ONLY COOL DEHUMI- AUTO QUICK
DIFICATION
HHHLHH
MMMLMH
LLLLLH
Auto Auto Auto L Auto H
Natural Natural Natural L Natural H
0°C
L
M
H
1°C2°C
(R.T-D.T)
(D.T)
(COOLING)
R.T=Room temperafure
D.T=Desired temperafure