Daewoo DWB-180RH-R User manual

Service Manual
Window Type
Room Air Conditioner
Model: DWB-180RH-R
DWB-186RH-R
DWB-240RH-R
DWB-246RH-R
DAEWOO ELECTRONICS CORP.

CONTENTS
1. Specifications................................................................................................2
2. Operation.....................................................................................................3
3. Wiring Diagram..........................................................................................18
4. Refrigerant Cycle.........................................................................................19
5. Control Block Diagram.................................................................................20
6. Circuit Diagram..........................................................................................21
7. Trouble Shooting Guide ...............................................................................24
8. Key Components of Electronic Circuit............................................................33
9. Disassembly Instructions ...............................................................................35
10. Exploded Diagram and Parts List...................................................................37
Contents

2
1. SPECIFICATIONS
ITEM MODEL DWB-180RH-R DWB-186RH-R DWB-240RH-R DWB-246RH-R
Power Source V/Ph/Hz AC 220-240V / 1 / 50Hz
Capacity Btu/h 18,000 24,000
(Cooling & Heating) Kcal/h 4,530 6,048
Dehumidification l /h 2.10
Power Cooling 2,240 2,750
Input(W) Heating 1,880 2,350
Running Cooling 10.40 13.10
Current(A) Heating 8.80 11.40
Type Recipro
Compressor Model H2EB243ABKC H2EB283ABKC
Capacitor 35µF/400VAC 40µF/370VAC
Overload Protector Internal Type
Model AM12DWD08(D.M.I) A2945CA011(D.M.I)
Fan Motor Capacitor 7.5µF/400VAC 7.5µF/400VAC
Indoor-Fan Blower Fan
Outdoor-Fan Propeller Fan
Control Capillary
Refrigerant (R-22) Capillary Tube ID ø1.4 x L800 x 2 ID ø 1.6 x L1000 x 2
Amount (g) 1,230 1,080
Dimensions (WxHxD) Unit (mm) 660 x 430 x 705
Packing (mm) 711 x 525 x 757
Weight (Kg) Net Weight 65 67
Gross Weight 69 71.5
Electrical
Data
Conditions by JIS C9812

3
1
PARTS OF NAME AND FUNCTION
• DWB-180RH-R/DWB-240RH-R
2. OPERATION
NO PART NAME
1 AIR FILTER
2 GRILL FRONT
3 CABINET
4 BLADE VERTICAL
NO PART NAME
5 PANEL CONTROL
6 REMOTE CONTROLLER
7 BLADE HORIZENTAL
8 AIR VENT
6
3
1
2
7
4
8
5

4
• DWB-186RH-R / DWB-246RH-R
6
5
3
4
8
2
7
1
9
NO PART NAME
1 AIR FILTER
2 INLET GRILLE
3 CABINET
4 BLADE VERTICAL
5 PANEL CONTROL
NO PART NAME
6 REMOTE CONTROLLER
7 BLADE HORIZENTAL
8 AIR VENT
9 GRILLE FRONT

5
2
REMOTE CONTROLLER
REMOCON SIGNAL TRANSMITTER
TIMER/CANCEL
• Everytime you push this button,
timer is set as follow.
(1Hr→2Hr→3Hr→4Hr→5Hr→6Hr
→8Hr→10Hr→12Hr→16Hr→20Hr
→24Hr→CANCEL).
After the unit is timed, if this
button is pushed, timer is
canceled.
SLEEP
• SLEEP mode is selected as
follow. (L1→L2→Cancel)
MODE
• Everytime you push this
button, it is selected as
follow.
(COOLING→HEATING→
FAN→COOLING)
AUTO SWING
• Everytime you push this
button, the auto swing
mode is toggled.
TEMPERATURE
• It is the button to set the room
in the desired room temp.
The temp. can be set within a
range from 16°C (60°F) to
32°C (90°F) by 1°C (1°F)
POWER ON/OFF
• To turn the unit ON, push this
button. To turn the unit OFF,
push this button, again.
FAN SPEED
• Everytime you push this
button, it is selected as follow.
(Low→High→Low)
TIMER/
CANCEL
FAN SPEED
TEMP
SLEEP
MODE
AUTO
SWING

6
3
REMOTE CONTROLLER DISPLAY
Room Air-conditioner
FAN
HEATING
COOLING
TEMP
TIMER
SENSOR
MODE POWER
FAN
SPEED AUTO SWING
TEMP./TIMER DISPLAY
•It displays the temperature and the timer.
MODE DISPLAY
•It displays the operating mode.
REMOCON SIGNAL RECEIVER
TEMPERATURE SET
•It is the button to set the desired
room temperature.
The temperature can be set
within a range from 16°C (60°F)
to 32°C (90°F) by 1°C (1°F)
POWER ON/OFF SWITCH
•To turn the unit ON, push this button.
To turn the unit OFF, push this
button again.
MODE SELECT
•Everytime you push this button, It is selected as
follow. (COOLING→HEATING→FAN→COOLING)
FAN SPEED
•Everytime you push this button, It is selected as
follow. (Low→High→Low)
AUTO SWING
•Everytime you push this button, the auto swing mode is toggled.
(When the fan stops in heating mode, the auto swing is also
stopped and restarts when the fan goes run.)
•DWB-180RH-R/DWB-240RH-R
CAUTION: When you turn off the unit with cooling mode, the Fan still work for about 10 seconds.

7
CAUTION: When you turn off the unit with cooling mode, the Fan still work for about 10 seconds.
•DWB-186RH-R / DWB-246RH-R
Room Air-conditioner
FAN
HEATING
COOLING TIMER
MODE POWER
FAN
SPEED AUTO
SWING
TEMP
SENSOR
TEMP./TIMER DISPLAY
•It displays the temperature and the timer.
MODE DISPLAY
•It displays the operating mode.
REMOCON
SIGNAL
RECEIVER
TEMPERATURE SET
•It is the button to set the desired
room temperature.
The temperature can be set
within a range from 16°C (60°F)
to 32°C (90°F) by 1°C (1°F)
POWER ON/OFF SWITCH
•To turn the unit ON, push this button.
To turn the unit OFF, push this
button again.
MODE SELECT
•Everytime you push this button, It is selected as
follow. (COOLING→HEATING→FAN→COOLING)
FAN SPEED
•Everytime you push this button, It is selected as
follow. (Low→High→Low)
AUTO SWING
•Everytime you push this button, the auto swing mode is toggled.
(When the fan stops in heating mode, the auto swing is also stopped and restarts when the
fan goes run.)

Replacing Batteries
8
Remove the COVER
from the back of the
remote controller.
•Slide the cover
according to the arrow
direction
Insert two battaries.
•Be sure that the (+) and
(–) directions are correct
•Be sure that both batteries
are new
Re-attach the cover.
•Slide it back into position
•Do not use rechargeable batteries such batteries differ from standard dry cells in shape,
dimensions and performance.
•Remove the batteries from the remote controller if the air conditioner is not going to be used for
an extended length of time.
1 2 3
–+
–+

4
OPERATION INSTRUCTION
FUNCTION
POWER ON
Push POWER button
COOLING MODE
Push the ‘MODE’button until
‘COOLING’lamp lights.
HEATING MODE
Push the ‘MODE’button until
‘HEATING’lamp lights.
FAN Delay in heating mode
Change desired room temperature
Push the ‘TEMP▲▼’button.
Change ‘FAN SPEED’
Push the ‘FAN SPEED’button.
OPERATION
1. The unit starts working.
(It is delayed 30 seconds after main
power source is supplied.)
when running the unit again after
once having stopped it, please wait
for over 3 minutes.
2. Default mode is ‘COOLING’mode.
3. Default desired room temperature is
‘26°C’(79°F).
And fan speed is ‘Low’.
1. Operating modes are changed as
follows by pushing “MODE”button.
(COOLING→HEATING→FAN→
COOLING)
2. The compressor and fan work.
3. In this mode you can change fan
speed and desired temperature at any
time.
4. SLEEP mode and ON/OFF TIMER
can be selected.
(By remocon button only)
1. Operating modes are changed as
follows by pushing “MODE”button.
(COOLING→HEATING→FAN→
COOLING)
2. The compressor and fan work.
3. In this mode you can change fan
speed and desired temperature at any
time.
4. SLEEP mode and ON/OFF TIMER
can be selected.
(By remocon button only)
There are 10 seconds time delay of the
Fan Motor, when compressor is starts or
stops.
1. The desired room temperature is
changed within a range from 16°C
(60°F) to 32°C (90°F) by 1°C.
1. FAN SPEED is changed as follows by
pushing “FAN SPEED”button.
(LOW→HIGH→LOW)
DISPLAY
1. Current room temperature is
displayed.
2. ‘COOLING’lamp lights.
1. Current room temperature is
displayed.
2. ‘COOLING’lamp lights.
1. Current room temperature is
displayed.
2. ‘HEATING’lamp lights.
no display
1. It display desired room temperature
when ‘TEMP’button is pushed.
3. After a few seconds, display is
changed to current room
temperature.
1. It displays as follows.
2. After a few seconds, display is
changed to current room
temperature.
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
LOW
HIGH
POWER
MODE
TEMP
MODE
TEMP
FAN
SPEED
FAN SPEED
or
or
MODE
MODE
or
or
or
9
•DWB-180RH-R/DWB-240RH-R

10
FUNCTION
FAN MODE
Push the ‘MODE’button until
‘FAN’lamp lights.
ON/OFF AUTO SWING
Push the ‘AUTO SWING’button.
OFF TIMER
Push the ‘TIMER/CANCEL’
button when unit is working.
(REMOCON ONLY)
OPERATION
1. The Fan works only.
2. In this mode, the unit circulate room
air.
3. Fan speed can be changed.
1. Auto swing function is toggled.
2. Air out-flow direction is changed
automatically. (left/right direction)
3. While the fan stops in heating
mode, the auto swing is also
stopped and restarts when the fan
goes run.
1. Timer is set to as follows by pushing
“TIMER/CANCEL”button.
(1hr→2hr→3hr→4hr→5hr→6hr→8hr
→10hr→12hr→16hr→20hr→
24hr→cancel)
2. Unit is off after timer is over.
3. If you want to cancel timer, push
this button again at any time.
DISPLAY
1. Current room temperature is
displayed.
2. ‘FAN’lamp lights.
There is no change in display.
1. ‘TIMER’lamp lights.
2. Setting time is displayed.
3. After a few seconds, display is
changed to current room
temprature.
4. At this time, operation mode is
displayed current setting mode.
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
AUTO
SWING
AUTO
SWING
TIMER/
CANCEL
MODE
MODE
or
or

FUNCTION
ON TIMER
Push the ‘TIMER/CANCEL’
button when unit is off.
(REMOCON ONLY)
SLEEP MODE
Push the ‘SLEEP’button in
‘COOLING’mode and
HEATING MODE. (REMOCON
ONLY)
Defrost the heat-exchanger of
the outside (in heating mode)
OPERATION
1. Timer is changed to as follows by
pushing “TIMER/CANCEL”button.
(1hr→2hr→3hr→4hr→5hr→6hr→8hr
→10hr→12hr→16hr→20hr→
24hr→cancel)
2. The unit starts working after set time
is over. (by the operation mode and
last setting temperature before the
unit is off.)
3. If you want to cancel timer, push this
button again at any time.
1. SLEEP MODE is changed as follows
by pushing “SLEEP”button.
(L1→L2→Cancel)
* L1 Mode
–The unit is off after 4 hours.
–The desired Temp is increased 3°C
(5.4°F) for 4 hours in Cooling mode.
–The desired temp is decreased 3°C
(5.4°F) for 4 hours in heating mode.
–Auto swing is selected.
–Fan speed is set to ‘LOW’.
* L2 Mode
–The unit work; as follow
–Auto swing is selected.
–Fan speed is set to ‘LOW’.
2. This mode can be selected in
‘COOLING’and ‘HEATING’mode
only.
The unit runs 50 minutes
The unit will start defrost function when
the temperature of the heat exchanger
of the outside arrived at the programed
temperature.
If not arrived at the programed
temperature, the unit continuousiy runs
the heating mode.
While the defrost function is working
the unit runs cooling cycle but the fan
stops.
DISPLAY
1. ‘TIMER’lamp lights.
2. Setting time is displayed.
3. After a few seconds, display is
changed to current room
temperature.
1. ‘L1’or ‘L2’is displayed.
no display
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
TIMER/
CANCEL
•ROOM TEMPERATURE DISPLAY.
Over 45°C or 100°F
5°C~45°C or 41°F~99°F
Below 5°C (41°F)
DISPLAY TEMPERATURE
11
SLEEP

12
FUNCTION
POWER ON
Push POWER button
COOLING MODE
Push the ‘MODE’button until
‘COOLING’lamp lights.
HEATING MODE
Push the ‘MODE’button until
‘HEATING’lamp lights.
FAN Delay in heating mode
Change desired room temperature
Push the ‘TEMP▲▼’button.
Change ‘FAN SPEED’
Push the ‘FAN SPEED’button.
OPERATION
1. The unit starts working.
(It is delayed 30 seconds after main
power source is supplied.)
when running the unit again after
once having stopped it, please wait
for over 3 minutes.
2. Default mode is ‘COOLING’mode.
3. Default desired room temperature is
‘26°C’(79°F).
And fan speed is ‘LOW’.
1. Operating modes are changed as
follows by pushing “MODE”button.
(COOLING→HEATING→FAN→
COOLING)
2. The compressor and fan work.
3. In this mode you can change fan
speed and desired temperature at any
time.
4. SLEEP mode and ON/OFF TIMER
can be selected.
(By remocon button only)
1. Operating modes are changed as
follows by pushing “MODE”button.
(COOLING→HEATING→FAN→
COOLING)
2. The compressor and fan work.
3. In this mode you can change fan
speed and desired temperature at any
time.
4. SLEEP mode and ON/OFF TIMER
can be selected.
(By remocon button only)
There are 10 seconds time delay of the
Fan Motor, when compressor is starts or
stops.
1. The desired room temperature is
changed within a range from 16°C
(60°F) to 32°C (90°F) by 1°C.
1. FAN SPEED is changed as follows by
pushing “FAN SPEED”button.
(LOW→HIGH→LOW)
DISPLAY
1. Current room temperature is
displayed.
2. ‘COOLING’lamp lights.
1. Current room temperature is
displayed.
2. ‘COOLING’lamp lights.
1. Current room temperature is
displayed.
2. ‘HEATING’lamp lights.
no display
1. It display desired room temperature
when ‘TEMP’button is pushed.
3. After a few seconds, display is
changed to current room temperature.
1. It displays as follows.
2. After a few seconds, display is
changed to current room temperature.
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
HIGH
LOW
POWER
MODE
MODE
FAN
SPEED
TEMP
MODE
TEMP
FAN SPEED
or
or
MODE
or
or
or
•DWB-186RH-R / DWB-246RH-R

13
FUNCTION
FAN MODE
Push the ‘MODE’button until
‘FAN’lamp lights.
ON/OFF AUTO SWING
Push the ‘AUTO SWING’button.
OFF TIMER
Push the ‘TIMER/CANCEL’
button when unit is working.
(REMOCON ONLY)
OPERATION
1. The Fan works only.
2. In this mode, the unit circulate room
air.
3. Fan speed can be changed.
1. Auto swing function is toggled.
2. Air out-flow direction is changed
automatically. (left/right direction)
3. While the fan stops in heating
mode, the auto swing is also
stopped and restarts when the fan
goes run.
1. Timer is set to as follows by pushing
“TIMER/CANCEL”button.
(1hr→2hr→3hr→4hr→5hr→6hr→8hr
→10hr→12hr→16hr→20hr→
24hr→cancel)
2. Unit is off after timer is over.
3. If you want to cancel timer, push
this button again at any time.
DISPLAY
1. Current room temperature is
displayed.
2. ‘FAN’lamp lights.
There is no change in display.
1. ‘TIMER’lamp lights.
2. Setting time is displayed.
3. After a few seconds, display is
changed to current room
temprature.
4. At this time, operation mode is
displayed current setting mode.
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
AUTO
SWING
AUTO
SWING
TIMER/
CANCEL
MODE
MODE
or
or

14
FUNCTION
ON TIMER
Push the ‘TIMER/CANCEL’button
when unit is off. (REMOCON ONLY)
SLEEP MODE
Push the ‘SLEEP’button in
‘COOLING’mode and HEATING
MODE. (REMOCON ONLY)
Defrost the heat-exchanger of the
outside (in heating mode)
OPERATION
1. Timer is changed to as follows by pushing
“TIMER/CANCEL”button.
(1hr→2hr→3hr→4hr→5hr→6hr→8hr→10hr
→12hr→16hr→20hr→24hr→cancel)
2. The unit starts working after set time is
over. (by the operation mode and last
setting temperature before the unit is off.)
3. If you want to cancel timer, push this
button again at any time.
1. SLEEP MODE is changed as follows by
pushing “SLEEP”button.
(L1→L2→Cancel)
* L1 Mode
–The unit is off after 4 hours.
–The desired Temp is increased 3°C
(5.4°F) for 4 hours in Cooling mode.
–The desired temp is decreased 3°C
(5.4°F) for 4 hours in heating mode.
–Auto swing is selected.
–Fan speed is set to ‘LOW’.
* L2 Mode
–The unit work; as follow
–Auto swing is selected.
–Fan speed is set to ‘LOW’.
2. This mode can be selected in ‘COOLING’
and ‘HEATING’mode only.
The unit runs 50 minutes
The unit will start defrost function when the
temperature of the heat exchanger of the
outside arrived at the programed
temperature. If not arrived at the programed
temperature, the unit continuousiy runs the
heating mode.
While the defrost function is working the unit
runs cooling cycle but the fan stops.
DISPLAY
1. ‘TIMER’lamp lights.
2. Setting time is displayed.
3. After a few seconds, display is changed
to current room temperature.
1. ‘L1’or ‘L2’is displayed.
no display
FAN
HEATING
COOLING
ROOMTEMP
DESIREDTEMP
TIMER
TIMER/
CANCEL
SLEEP
•ROOM TEMPERATURE DISPLAY.
Over 45°C or 100°F
5°C~45°C or 41°F~99°F
Below 5°C (41°F)
DISPLAY TEMPERATURE

15
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: 16~32°C
(2) Setting temperature: Operating temperature of compressor
If the Unit Display receive the signal of Remote Controller, you can hear the signal "beep –" or "beep, beep".
OFF-Timer
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+1˚CRoom
Temperature
Desired
temperature
COMP (ON)
(HEATING)
COMP (OFF)
+3˚CRoom
Temperature
5
DESCRIPTION OF FUNCTIONS

16
(1) When you are going to sleep, select sleep button in remocon and the unit controls the room to the desired
temperature. (The unit will not operate after 4 hour)
(2) For changing the temperature.
•L1 Mode (Cooling)
•L1 Mode (Heating)
•The unit will not operate after 4 hour.
•The unit will not operate perfectly after 4 hour.
(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
SET TIME
Desired
Difference
desired temperature
between room
temperature (°C) 0.5°C0.5°C0.5°C
Temperature
Fan Speed
(1) Motor speed (high speed, low speed).
(2) Remote controller setting fan speed. (H, L)
(3) Relation of operating mode between fan speed.
FAN ONLY COOL HEAT
HHHH
LLLL
1
0 0.5 1.0 HOUR
SET TIME
Desired
Difference
desired temperature
between room
temperature (°C)
1°C1°C1°C
Temperature
•L2 Mode (Cooling)
•The unit will not operate perfectly after 10 hour.
•L2 Mode (Heating)
•The unit will not operate perfectly after 10 hour.
1°C
1°C1°C

17
Auto Swing
(1) When you push this button, in remocon the left/right flap move to the position of keeping the room temperature
comiortable.
(2) The air discharge direction procedure is below.
Auto swing Fixed
DE-ICE OPERATION
Self-Diagnostic Function
The control will contain diagnostic test to verify the integrity of the system.
(1)Error Code Display
ERROR CODE 88 LED DISPLAY ERROR CONTENTS
1 •Room air thermistor open.
•Heat exchanger thermister open
2•Room air thermister short
•Heat exchanger thermister short
Entering de-ice operation(to turn cooling cycle).
1. The micro-computer chip is check the temperature of condensor, After 50 minutes since the units starts on heating mode.
2. If the Temperature is below -4˚C, the De-ice function will start.
3. Now, the unit turned to cooling operation but fan motor is off.
Back to heat mode.
1. On the de-ice operation if the temperature is going over 15˚C.
2. Or 15minutes passed on the de-ice operation.
3. Now the unit turned to heating mode.
Remark: This de-ice operation is always repeat in heating mode when satisfying of the condition to enter the de-ice
operation.
ON
Time
50minutes 15minutes
Sensing
Temperature
Compressor
(Heater sump)
Fan motor
(Reversing valve)
(Lamp)
ON
(-4¡C) (15¡C)
ON
OFF
In normal operation, there is a time delay of three minutes between turn off and turning back on including
initial power up. (but when the unit resets the time delay is 30 seconds)
3min. Time Delay of Compressor

18
3. WIRING DIAGRAM

19
4. REFRIGERANT CYCLE
Evaporator
Blower fan
MOTOR
Reversing
Valve
Accumulator
Propeller fan
Condenser
Refrigerant flow(COOLING)
Refrigerant flow(HEATING)
Capillary Tube
M
Compressor