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.

(Connecting method)

4

INSTALLATION OF OUTDOOR UNIT

5

REFRIGERANT TUBE CONNECTION

IDU TERMINAL BLOCK

321YN L

ODU TERMINAL BLOCK

321YN L

220V/50Hz

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

1.25mm

2

1.25mm

2

1.25mm

2

1.25mm

2

1.25mm

2

1.25mm

2

1.25mm

2

2.0mm

2

2.0mm

2

2.0mm

2

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

FAN SPEED

TURBO/MILD

A
U

T
O

F
A
N

D
I
R

.
F
A
N

D
IR

.

9

ROOM TEMPERATURE / DESIRED TEMPERATURE INDICATOR

- It displays current room temperature and desired room temperature.

FAN MODE INDICATOR

AUTO MODE INDICATOR

TIMER/SLEEP INDICA T OR

ECONOMY MODE
INDICA T OR

MODE BUTTON

ECONOMY MODE BUTTON

ON/OFF BUTTON

- Whenever you push this button.
It repeats on -> off -> on -> off.

AUTO F AN SPEED INDICATOR

FAN SPEED INDICATOR

COOL MODE INDICA T OR

QUICK MODE

INDICA T OR

HEA T MODE

INDICA T OR
(ONLY HEAT PUMP
MODEL)

MILD MODE INDICA T OR

DEHUMIDIFIER MODE
INDICA T OR

FAN SPEED BUTT ON

- AUTO -> LOW -> MIDDLE ->
HIGH -> NATURAL

TEMPERA TURE BUTT ONS

- Each time you push
this button, temperature
goes up by 1˚C.

- Each time you push
this button, temperature
falls by 1˚C.

10

Outdoor Unit

OUTDOOR UNIT AIR IN

- If there is any obstacle in front
of the grille, the efficiency of
the unit can be lowered.

OUTDOOR UNIT AIR OUT

SERVICE VALVES(GAS TUBE)

SERVICE VALVES(LIQUID TUBE)

CAUTION

• Do not install the outdoor unit on
unstable place like outside wall of
building or outside of balcony. In case
of falling, it may cause serious trouble
and damage.

11

Name of Each Button

2

REMOTE CONTROLLER

MODE

SLEEP

ON/OFF

TIMER

ENTER/
CANCEL

FAN SPEED

TURBO/MILD

Display

Displays information
pertaining to unit.

TURBO/MILD

Press to be more silent and
comfortable room condition

TIMER ENTER/CANCEL Button

Press to enter a timer setting or
to cancel timer setting

TIMER ON/OFF Button

Press to set the unit off 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/Cool/Fan/Dehumidifier/
Heat)

SLEEP Button

Press to set the unit for
the sleep mode.

FAN DIR. Button

Press to select up/down
direction for fan.

FAN DIR. Button

Press to select left/right
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
(Auto, High " ", Middle " ",
Low " ", Natural).

COVER

Slide down to access most
of the remote buttons.
Slide down further to
access the battery
compartment.

AUTO

FAN DIR.

FAN DIR.

12

Replacing Batteries

3

REMOTE CONTROLLER DISPLAY

Slide down the cover to
access most of the
remote buttons. Slide
down further to access
the battery compart­ment.

Insert two “AAA” size
Alkaline batteries
following the polarity
diagram below.

1

2

MODE Indicators (Auto/Quick/Cool/Fan/Dehumidifier/Heat)

Lights to indicate the mode selected.

TIMER Indicators

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 breeze.

FAN Indicators

Lights to indicate
the fan speed.

AUTO

ON/OFF

TIMER

ENTER/
CANCEL

TURBO/MILD

+–

+–

13

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

(3) During the time of test operating, Fan (Indoor, Outdoor) and Compressor is running regardless of room

temperature.

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)

*RT: ROOM TEMPERATURE
DT: DESIRED TEMPERATURE

COMP (OFF)

-1°C0°C
(COOLING)

(RT-DT)

COMP (ON)

COMP (OFF)

-1°C0°C
(HEATING)

(DT-RT)

+1˚C +1˚C

14

Fan Speed (Indoor Unit)

(1) Motor speed (high speed, middle speed, low speed).
(2) Remote controller setting fan speed. (Auto, L, M, H, Natural)
(3) Relation of operating mode between fan speed. (legned: X-no relation)

(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.

0°C

L

M

H

1°C2°C

(RT-DT)

L

H

M

0°C1°C2°C3°C (DT-RT)

(COOLING)

(HEA TING)

FAN ONLY COOL

DEHUMI-

AUTO QUICK HEAT

DIFICATION

H HHLHH H
M MMLMH M
L LLLLH L

Auto X Auto L Auto H Auto

Natural Natural Natural L Natural H Natural

15

(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.

(3) To cancel sleep mode, press the SLEEP button again or press the MODE button once.: the SLEEP

indicator will disappear in the display.

Sleep Mode

0 0.5 1.0 HOUR

(COOLING CYCLE)

DT

+0.5°C

+0.5°C

+0.5°C

0 0.5 1.0 HOUR

(HEATING CYCLE)

DT

–0.5°C

–0.5°C

–0.5°C

Frost Prevention of Indoor Unit

When the unit operates at low ambient temperature, frost may appear on the Evaporator. When the indoor coil
temperature is lower than -2°C at the end of 10 minutes of continuous compressor operation from the start, the
microcomputer of the unit stops the compressor to protect the unit from the frost. The control procedure for
indoor coil freeze protection.

1) The compressor and outdoor fan turn off.

2) Indoor fan operates according to user set speed.

3) The normal operation returns when the indoor coil
temperature is higher than 7°C or equal to 7°C.

7°C-2°C

Compressor and
Outdoor Fan

OFF

ON

(Indoor coil temperature)