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.

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 compart-
ment.
Insert two “AAA”size
Alkaline batteries
following the polarity
diagram below.
12
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)
(HEATING)
FAN ONLY COOL DEHUMI- AUTO QUICK HEAT
DIFICATION
HHHLHH H
MMMLMH M
LLLLLH 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)

16
Auto Mode
(1) In Auto Mode
After the indoor fan is operated for 20 seconds in the Auto Mode, the unit will operate automatically by selecting
operating Mode according to the room temperature
(2) Selecting Operating Mode Again
Room temperature meets desired temperature and the compressor stops running over 30 minutes, then the unit
selects operating Mode again.
3 Seconds Time Delay of Indoor Fan Motor
When the speed of indoor fan motor changes, there is a time delay of 3 seconds at each speed step.
ROOM TEMPERATURE
DT+3˚C RT
DT-2˚C RT DT+2˚C
DT -2°C RT
OPERATING MODE
Cooling
Dehumidifier
Heating
RT: Room temperature
DT: Desired
()
3 min. Time Delay of Compressor
In normal operation, there is a time delay of three minutes between turn off and turning back on including initial
< <
>
<

17
(1) Cooling Mode
* When the room temperature is higher than 22˚C or
equal to 22˚C
1Fan Speed: high speed (Fixed)
2Air discharge direction: The control is available.
3Set temperature: 18°C (Fixed)
(1) Heating Mode
* When the room temperature is lower than 22˚C
1Fan Speed: high speed (Fixed)
2Air discharge direction: The control is available.
3Set temperature: 32°C (Fixed)
Dehumidification Mode
Air Discharge Direction
Quick Mode(Powerful Cooling & Heating)
1DT+1˚C < RT
Outdoor Fan, Compressor : ON
Indoor Fan : Low speed
2DT-1˚C RT DT+1˚C
Outdoor Fan, Compressor : 3 min/ON, 5 min/OFF
Indoor Fan : Low speed
3DT-1˚C > RT
Outdoor Fan, Compressor : OFF
Indoor Fan : Low speed
<
<
1. Press fan direction button to select fan direction
•Press desired fan direction button, "UP •DOWN" or "LEFT •RIGHT" control louver moves, press
again to stop
FAN DIR.
FAN DIR.
Self-Diagnostic Function
The control will contain diagnostic test to verify the integrity of the system.
(1) Error Code Display : RT (Room Temperature) LED
ERROR CODE DISPLAY ERROR CONTENTS
1 “E2”Indoor unit sensor open or short
2“E2”Outdoor unit sensor open or short
3“E3 ”Compressor, Electrical parts of
comp. Gas leak

18
5. CIRCUIT DIAGRAM
◆ DPB-280LH
1
WIRE CONNECTION OF INDOOR AND OUTDOOR UNIT

19
◆ DPB-280LH
2
MAIN ELECTRIC PARTS
Object/part No.
Motor-compressor
Outdoor fan motor
Indoor fan motor
Thermal protector for
fan motor
Synchronous motor
Stepping motor
Dual capacitor for
compressor and
outdoor fan motor
Running capacitor
for indoor fan motor
Terminal block
Transformer
Reversing valve
Compressor heater
AC Control realy
Relay
Fuse
X2 capacitor
Photocoupler
Varistor
Triac
Manufacturer/trademark
Copeland
DMI
O-YANG
Korea Taxas
Instruments
Jaeil engineering
Namyang Precision
(Alter)
Hyup jin precision
Samwha capacitor
Samwha capacitor
Donglim
Namsung electronics
Ranco japan
Young chang
Omron electronics
Chung won electronics
Triad electronics
Pilkor electronics
Toshiba electronics
Marcon electronics
Toshiba electronics
Type/model
ZR36K3-PFJ
A2935BA010
DE112
17AM035A5
ST-16
NYM-16H-1
MSFCC20F02
37H08500B
PEB-958
DTB-8P
DWA-5401FN
V26110D
G7L-2A-TUB
CS11-12H
50T
PCX2 335
TLP560J
TNR15G561K
SM3JZ47
Technical data
AC220-240V 50Hz R22
AC 230V 50Hz
AC 230V 50Hz
AC 250V
AC 220-240V 50/60Hz
AC 220-240V 50/60Hz
DC 12V
8/50µF 370VAC
5µF 400VAC
AC 300V 25A
AC 220V/18VDC 50/60Hz
AC 220-240V 50Hz
AC 220V 40W
AC 220-240V 25A
AC 250V 5A
AC 250V 3.15A
AC 275V
AC 250V
504-616V 50A
600V 3A
Standard Mark(s) of confirmity
DEMKO
NONE
NONE
VDE
NONE
NONE
TUV, UL, CSA
TUV, UL, CSA
NONE
NEMKO
NONE
NONE
VDE
TUV, UL, CSA
VDE
VDE, N.S.
VDE
UL
UL