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.
321YN L
IDU TERMINAL BLOCK
ODU TERMINAL BLOCK
321YN L
220V/50Hz
(Connecting method)
4
INSTALLATION OF OUTDOOR UNIT
5
REFRIGERANT TUBE CONNECTION

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
1.25mm2
1.25mm2
1.25mm2
1.25mm2
1.25mm2
1.25mm2
1.25mm2
2.0mm2
2.0mm2
2.0mm2
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
FANSPEED
TURBO/MILD
AUTO
FANDIR.
FANDIR.

9
ROOM TEMPERATURE / DESIRED TEMPERATURE INDICATOR
- It displays current room temperature and desired room temperature.
FAN MODE INDICATOR
AUTO MODE INDICATOR
TIMER/SLEEP INDICATOR
ECONOMY MODE
INDICATOR
MODE BUTTON
ECONOMY MODE BUTTON
ON/OFF BUTTON
- Whenever you push this button.
It repeats on -> off -> on -> off.
AUTO FAN SPEED INDICATOR
FAN SPEED INDICATOR
COOL MODE INDICATOR
QUICK MODE
INDICATOR
HEAT MODE
INDICATOR
(ONLY HEAT PUMP
MODEL)
MILD MODE INDICATOR
DEHUMIDIFIER MODE
INDICATOR
FAN SPEED BUTTON
- AUTO -> LOW -> MIDDLE ->
HIGH -> NATURAL
TEMPERATURE BUTTONS
-Each time you push
this button, temperature
goes up by 1˚C.
-Each time you push
this button, temperature
falls by 1˚C.