Daewoo DWB-180C-R User manual

Ser vice Manual
Window Type
Room Air Conditioner
Model: DWB-180C-R
DWB-240C-R
DWA-181C
DWA-240C-R
DAEWOO ELECTRONICS CO., LTD.
http://svc.dwe.co.kr May . 2001
S/M No. :180/240C-R
✔ 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).

1
TABLE OF CONTENTS
1. PRECAUTION...............................................................................2
2. GENERAL SPECIFICATIONS ................................................................3
3. NAMES OF MAJOR COMPONENTS .........................................................4
4. FUNCTION OF MAIN COMPONENTS ........................................................5
5. GENERAL INFORMATIONS .................................................................6
6. CARE AND MAINTENANCE .................................................................7
7. TROUBLE SHOOTING GUIDE ...............................................................8
8. HOW TO DISASSEMBLE...................................................................10
9. WIRING DIAGRAM.........................................................................11
10. REFRIGERANT CYCLE ...................................................................12
11. EXPLODED DIAGRAM AND PARTS LIST ..................................................14

2
1. PRECAUTION
Please observe the following instructions.
1. Turn off unit.
Make sure the unit is OFF and the AC cord is unplugged before repairing or servicing.
2. In case of checking the circuit unavoidably while the unit is connected with power source, be careful
not to connect with the part of electric charge.
You may cause electric shock.
3. Use of proper part if you need to replace the part, be sure to use genuine part of servicing model.
Do not repair or replace the electric contact part.
Consumer must not repair the unit, because it is dangerous.
4. Use of proper tool.
You must use the proper tool to repair the unit, and use the measuring appliance adjusted accurately.
5. Damage of electric wire and power cord when servicing.
Check electric wire and a surely replace a damage electric wire and a damage power cord.
6. Never use connecting the middle of wire, after cutting the middle of wire.
It may cause a fire and trouble.
7. Checking the insulation resistance.
After you complete the assembly of unit, surely check the insulation resistance.
Confirm that the insulation resistance of the power line and the ground terminal is over 30MΩby measuring insulation
resistance.
8. Checking the ground.
After checking the ground, servicing it completely.
9. Checking the installation.
After checking the installation, servicing it completely.
10. Care children.
When servicing, do not make the children approach the air-conditioner.

3
2. GENERAL SPECIFICATIONS
ITEM MODEL DWB-180C-R DWB-240C-R DWA-181C DWA-240C-R
Power source V/Hz AC 220~240V/50Hz AC 208~230V/60Hz
Cooling Capacity Btu/h 18,000 24,000 18,000 24,000
Kcal/h 4,530 6,050 4,530 6,050
Energy Efficiency Ratio Btu/wh 7.83 8.89 8.4 8.89
Kcal/wh 1.97 2.24 2.1 2.24
Dehumidification g/h 2,200 2,500 2,300 2,700
Electrical Data Power Input 2,300 2,700 2,150 2,700
Running Current 10.5 13.0 11.6 12.6
Compressor
Type Recipro Recipro Rotary Recipro
Model AWG5524EXC AWG5530EXC RCA180T001 AWG5525EXN
Capacitor 35µF/400VAC 45µF/400VAC 30µF/400VAC 35µF/400VAC
Model AM12DWD08 A2945CA010 IC12640DWWF6A A2951GA010
Fan Motor Capacitor 7.5µF/400VAC 7.5µF/400VAC 6µF/400VAC 7.5µF/400VAC
Indoor-Fan Blower-Fan
Outdoor-Fan Propeller-Fan
Refrigerant(R-22) Control Capillary
Charge Amount (g) 730 850 935 1030
Dimensions Unit (W x H x D) 660 x 430 x 705 (mm)
Packing (W x H x D) 710 x 525 x 757 (mm)
Weight Net Weight (Kg) 64 67 51.5 66
Gross Weight (kg) 69 72 56.0 71

4
3.NAMES OF MAJOR COMPONENTS
NO PART NAME
1 AIR FILTER
2 GRILL FRONT
3 CABINET
4 BLADE VERTICAL
5 KNOB THERMOSTAT
6 KNOB SELECTOR
NO PART NAME
7 BLADE HORIZONTAL
8 AIR VENT
9 AIR INTAKE
10 AIR DISCHARGE
11 AUTO LOUVER SWITCH
3
9
0
7
4
8
q
1256

5
4. FUNCTION OF MAIN COMPONENTS
1. ROTARY SWITCH (SELECTOR)
Please refer to the part of selector in the chapter 9 (Wiring Diagram).
The rotary switch (selector) controls the fan motor's rotation speed, and has six positions.
The function of the six position is as follow.
OFF: This position stops all operations of the air conditioner.
HIGH COOL: This position provides the maximum air flow for rapid
cooling, dehumidifying and dust removing operations.
(Use this position on sultry summer days.)
MED COOL: This position provide the medium air flow for cooling
dehumidifying and dust removing operations
LOW COOL: This position provides the minimum air flow for quiet
cooling, dehumidifying operations.
(Use this position on suitable for night-time.)
HIGH FAN: This position provides the maximum air fiow alone fan
operation without cooling operation.
LOW FAN: This position provides the minimum air flow air flow alone
fan operation without cooling operation.
2. THERMOSTAT (TEMPERATURE CONTROL)
The Thermostat automatically starts and stops operation in order to keep
the room temperature at a proper level, and this results in efficient use of
power and economical cooling.
Turn clockwise for a cooler room temperature.
Turn counter-clockwise for a warmer room temperature.
3. MOTOR
The motor is used to rotate the indoor and outdoor fan so that the room air can be recirculated.
4. FAN
BLOWER FAN: The Blower draws hot air from the room through the Evaporator and then discharges it back into the
cool air. It circulates the room air.
PROPELLER FAN: The propeller draws outdoor air through louvering and cools Condenser, and then blows the hot
air out.
5. CAPACITOR
The Capacitor enlarges the difference of phase between main coil and sub coil so that the Compressor and Fan Motor
starts well.
6. ACCUMULATOR
The Accumulator blocks the unflow of liquid refrigerant and impurities into the Compressor.

6
5. GENERAL INFORMATIONS
1. CHANGING AIR FLOW DIRECTION
Air flow deflectors divert air from center flow to left or right.
Adjust deflectors for desired air flow pattern.
2. AIR FLOW AROUND UNIT
Check in door grill and outdoor louvers for air flow obstructions. Do not block air flow to and from unit. The outdoor coil
should be checked and periodically cleaned for debris that may collect and block unit air flow. If air flow is obstructed
or deflected back into unit, the compressor may cycle on and off rapidly, causing early compressor failure.
3. Electrical Grounding Instructions.
This appliance is equipped with a three-prong(grounding) plug for protection against possible shock hazards. If a two-
prong wall receptacle is encountered, the customer is required to contact a qualified electrician and have the two-
prong wall receptacle replaced with a properly grounded three-prong wall receptacle in accordance with the National
Electrical Code.
4. USE OF EXTENSION CORDS
Because of potential safety hazards under certain conditions we strongly recommend against the use of an extension
cord. However, if you still elect to use an extension cord, it is absolutely necessary that it be a UL listed 3-wire
grounding type appliance extension cord rated has a 3-blade grounding plug and a 3-slot receptacle that will plug into
appliance. The marked rating of the extension cord should be AWG #12 or more.
5. DRAIN HOLE AND WATER DRIPPING OUTSIDE
Locate drain hole at the rear of unit. Water in base pan is picked up by the fan blade and thrown onto the warm
outdoor coil where it evaporates. The air conditioner must be installed level or tited or slightly to the outside for proper
water disposal. On exceptionally hot and humid days the air conditioner may permit excess water to pass thru rear
drain hole or overflow. This should be considered normal.

7
6. CARE AND MAINTENANCE
1. AIR FILTER
Clean the air filter, which removes dust inside the room.
It should be washed at least once every week during operation.
1. Remove the Air Filter from the front grill by pulling up.
2. Clean Air Filter with a vacuum cleaner or lukewarm, soapy water.
3. Shake it when clean to remove moisture completely. Replace it.
2. CLEANING THE AIR CONDITIONER
1. At least once a year, remove cabinet and thoroughly clean air conditioner. Have the unit inspected by an authorized
servicer to ensure unit is functioning properly.
2. Wash air conditioner with lukewarm, soapy water as needed. Rinse and dry thoroughly.
3. If using concentrated liquid detergent, dilute in warm water first.
4. Front grill may be wiped off with a cloth dampened in a mild detergent solution.
5. Cabinet may be washed with mild soap or detergent and lukewarm water, then polished with liquid wax for
appliances.
6. Condenser and Evaporator coils should be cleaned at the beginning of each cooling season. Use a soft brush or
vacuum cleaner to clean them, making sure that the Condenser and Evaporator coils are not damaged.
7. Do not use abrasive cleaners. These items scratch, crack and discolor surfaces.

8
7. TROUBLE SHOOTING GUIDE
TROUBLE SITUATION ANALYSIS CAUSE REMEDY
Fan motor and
compressor do not run
Switch is in "cool"
position but the
compressor does not
run
1. Power failure
2. Power is supplied,
but the equipment
does not run
1. Not operating at all
2. Compressor
3. Frequent start and
stop
1) Power plug
2) Circuit breaker
1) receptacle
2) Operation switch
3) Cord or lead wire to
the switch
1) Compressor
2) Thermostat
3) Selector switch
4) O.L.P
5) Capacitor
1) Electricity
2) Room temperature
and outside
temperature
3) Compressor
4) O.L.P
5) Capacitor
1) Thermostat
2) Capacitor
3) O.L.P
1) Power failure
2) Circuit breaker is tripped
3) Power plug is not contacting
Disconnection
Mechanical failure of switch
1) Disconnection
2) Malfunction of contact
Disconnection or burned-out
1) Failure
2) Malfunction
3) Knob is not set to the proper
setting
Failure of malfunction of proper
setting
1) Turn over
Lack of capacity
Disconnection
1) The voltage exceeded allowed
range
2) Capacity of wire is not
sufficient
Extremely high
Burned-out
Malfunction
Lack of capacity
Malfunction
Lack of capacity
Turn over
Consult your electric company
In case of a breaker, turn it on
and off a few times
Replace the power plug
Repair or replace the
receptacle
Replace the cord or lead wire
Replace the compressor or
connection wire
Replace
Repair or replace
Turn knob for cooler setting
Repair or replace the swtting
Wait until return it.
Replace
Repair
Consult your electric company
Check the capacity of wire
Ventilate well and remove the
heat source
Replace
Replace
Replace
Replace
Replace
Wait until return it.

9
TROUBLE SITUATION ANALYSIS CAUSE REMEDY
The compressor runs
but the motor doesn't
run
Both fan motor and
compressor are
running but cooling is
bad
Vibration & Noise
Water leakage into
room
Electric shock
(Leakage of current)
Not cooling at all
Insufficient cooling
1) Fan
2) Fan motor
3) Capacitor
4) Fan motor circuit
Refrigerant system
1) Refrigerant system
2) Filter
3) Heat exchanger of
condenser
1) Installation place
2) Fan
3) Fixing screws
4) Electric
components
Installation condition
Insulation of
components
Blocked by others
Disconnection or burned-out
electric cord
Failure malfunction of contact
Disconnection of malfunction of
contact
1) Refrigerant system is choked
2) Compressor failure
3) Leakage of refrigerant gas
1) Refrigerant system is choked
2) Compressor failure
3) Leakage of refrigerant gas
4) Refrigerant charge is too high
Clogged up with dust
1) Fin is cogged up with dust
2) The ventilation is not good
3) The unit is exposed to the
sunlight
4) Other heat source is added in
the room
Installation of the unit is
imperfectly done
1) Fan is contacted with
obstacles
2) Fixing bolt
Have a screw loose
Electrical noise
The front is lower than rear
side
1)Insulation defect of wiring and
lead wire
2) Leakgae of current due to the
dew or rust
Repair
Replace the fan motor
Replace
Check the circuit
Repair
Repair
Recharge refrigerant gas
Check and repair refrigerant
system
Replace
Check a part of Leakage and
repair
Repair and recharge
Clean the air fiter
Clean the unit
Shade the unit from the
sunlight
Remove the added heat
source
Install the unit perfectly
Remove obstacles
Tighten the bolt
Tighten the screw
Exchange the components
Make rear side of the unit
lower than the front
Check the unit's Leakage of
current.
Replace the defective parts or
components