Daewoo DWA-120C User manual

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CONTENTS
1. Precaution
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2. Specification
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3. Wiring diagram
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4. Structure and parts name
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5. Function of main components
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6. Trouble shooting guide
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7. How to disassemble
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8. Refrigerant cycle
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9. Exploded diagram and parts list
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1.PRECAUTION
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, replace it. 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 a wire, after cutting the middle of a wire,
- It may cause a fire and trouble.
7. Checking the insulation resistance.
- After you complete the assembly of the unit, surely check the insulation resistance. Confirm that the insulation
resistance of the power line and the ground terminal is over 30MΩby measuring insulation ohmmeter.
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.

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2.SPECIFICATION
ITEM MODEL DWA-120C DWB-120C DWA-100C DWB-090C DWA-120CT DWB-120CT DWA-100CT
Function Cooling
Power AC 208V~230V AC 220V~240V AC 208V~230V AC 220V~240V AC 208V~230V AC 220V~240V AC 208V~230V
1ø 60Hz 1ø 50Hz 1ø 60Hz 1ø 50Hz 1ø 60Hz 1ø 50Hz 1ø 60Hz
Capacity W 3,510 3,510 2,930 2,640 3,510 3,510 2,930
BTU/H 12,000 12,000 10,000 9,000 12,000 12,000 10,000
Dehumidification l/H 1.5 1.5 1.3 1.2 1.5 1.5 1.3
Power Input W 1,280 1,280 1,100 900 1,280 1,280 1,100
Electrical Data Running Currunt A 6.1 6.5 5.0 4.1 6.1 6.5 5.0
Starting Current A 30 34 29 24 30 34 23
Type Rotary
Compressor Model RCA120A RCB120A RCA100A RCB090A RCA120A RCB120A EAB090111A
Capacitor 30uF/370VAC 25uF/370VAC 25uF/370VAC 25uF/370VAC 30uF/370VAC 25uF/370VAC 15uF/370VAC
Refrigerant (R-22) 870g 880g 870g 820g 870g 880g 680g
Air Filter WASHABLE
FAN (Indoor side) BLOWER FAN
FAN (Outdoor side) PROPELLER FAN
Unit W¡¿H¡¿D mm 560¡¿385¡¿605
Dimension Packing W¡¿H¡¿D mm 631¡¿474¡¿700
& Weight Net Weight kg 43 43 41 42 43 43 40
Gross Weight kg 48 48 46 47 48 48 45

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3.WIRING DIAGRAM
H
F
C
SELECTOR SWITCH
THERMOSTAT
SWITCH
FAN MOTOR
SWING
MOTOR
CAPACITOR
POWER
CORD
GRN/YEL(GRN)
BLU
ORG
YEL
GRN/YEL
RED
BRN
TIMER
TIMER
MOTOR
BRN(WHT) 2
5
1BRN
OFF
1(d) 8(4)
2(1)
6(3)
4(2)
L C
FAN LOW MED HI
BLU(BLK)
COMPRESSOR
O.L.P
DWA-120CT
DWB-120CT
DWA-100CT
BLU
BLU
RED
YEL
YEL BRN BRN
RED RED
AUTO LOUVER
SWITCH
C
R
S
H
F
C
SELECTOR SWITCH
THERMOSTAT
SWITCH
FAN MOTOR
SWING
MOTOR
CAPACITOR
POWER
CORD
GRN/YEL(GRN)
BLU
ORG
YEL
GRN/YEL
RED
BRN
BRN(WHT)
OFF
1(d) 8(4)
2(1)
6(3)
4(2)
L C
FAN LOW MED HI
BLU(BLK)
COMPRESSOR
O.L.P
DWA-120C
DWB-120C
DWA-100C
DWB-090C
BLU
RED
YEL
YEL BRN BRN
RED RED
AUTO LOUVER
SWITCH
C
R
S

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4.STRUCTURE AND PARTS NAME
1. EXTERNAL STRUCTURE AND PARTS NAME
• DWA-120CT/DWB-120CT/DWA-100CT
1. INSERT GRILLE
3. CABINET
9. BRADE
HORIZONTAL 2
10. DOOR VENTILATION
11. AUTO LOUVER SWITCH
2. FRAME GRILLE
6. THERMOSTAT KNOB
7. TIMER KNOB
8. SELECTOR KNOB
4. BLADE HORIZONTAL 1 5. BLADE VERTICAL
1. GRILLE FRONT 8. BLADE
HORIZONTAL 2
9. DOOR VENTILATION
10. AUTO LOUVER SWITCH
5. AIR FILTER
6.THERMOSTAT KNOB
7. SELECTOR KNOB
2. CABINET 3.BLADE HORIZONTAL 1 4.BLADE VERTICAL
• DWA-120C/DWB-120C/DWA-100C/DWB-090C

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2. INTERNAL STRUCTURE AND PARTS NAME
1FRONT GRILLE
2SCROLL
3GUIDE TOP
4PLATE ORIFICE
5FAN
6CABINET
1
2
3
5
4
6

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5.FUNCTION OF MAIN COMPONENTS
1. THERMOSTAT
The thermostat automatically starts and stops the operation in order to keep the room temperature at a proper level.
and this results in efficient use of power and economical cooling.
2. TIMER (Only DWA-120CT/DWB-120CT/DWA-100CT)
The Timer operation is set by means of the Knob.
TO RELEASE THE TIMER OPERATION.
Turn the timer Knob clockwise and set at continue position. Air conditioner will start normal operation.
TO TURN OFF THE AIR CONDITIONER DURING THE TIMER OPERATION
Set the timer Knob at off position. If the timer Knob is set at a position other than continue, air conditioner is in timer
operation when restarting.
TO CHANGE THE TIMER OPERATION
Set the timer at a desired time. The timer will operate from now to the newly set time.
3. ROTARY SWITCH (SELECTOR)
¡
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)
¡
MEDIUM COOL : This position provides the medium air flow for moderate cooling.
¡
LOW COOL : This position provides the minimum air flow for quiet cooling and dehumidifying operations.
(Suifable for night-time)
¡
FAN : This position provides fan operation alone for circulation and dust removal from room air.
4. AUTO LOUVER SWITCH
When the auto louver switch is turned to "ON" position, two vertical louvers automatically move right and left.
Thus, you can obtain comfortable cooling. The vertical louvers may be stopped at any position when the auto
louver switch is turned off.
5. VENT
Brings outside air into room.
6. MOTOR
The motor is used to rotate the indoor and outdoor fan so that the room air can be recirculated.
7. FAN
¡
Blower : The blower draws hot air from the room through the evaporator and then discharges it back into the
room after changing it into the cool air. It circulates the room air.
¡
Propeller : The propeller draws outdoor air through chassis and cools the condenser and then blows the hot air out.
8. CAPACITOR
The capacitor enlarges the difference of phase between main coil and sub coil so that the compressor and Fan Motor
starts well.
9. ACCUMULATOR
The accumulator blocks the inflow of liquid refrigerant & impurities into the compressor.

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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
4) Timer
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
contact
1) Disconnection
2) Malfunction of contact
¡
Lack of capacity
¡
Disconnection
1) The voltage exceeded
allowed range
DWA-XXX (253V-187V)
DWB-XXX (264V-198V)
2) Capacity of wire is not
sufficent
¡
Extremely high
¡
Burned-out
¡
Malfunction
¡
Lack of capacity
¡
Malfunction
¡
Lack of capacity
¡
Malfunction
¡
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
switch
¡
Repair
¡
Repair or replace
¡
Replace
¡
Repair
¡
Consult your electric
company
¡
Check the capacity of
wire
¡
Ventilate well and remove
the heat source
¡
Replace
¡
Replace
¡
Replace
¡
Replace
¡
Replace
¡
Replace
6.TROUBLE SHOOTING GUIDE

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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
1) Each wiring
¡ 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
4) Refrigerant charge is too high
¡Clogged up with dust
1) Fin is clogged 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
¡Mounting chassis does not
slant property to outside.
¡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
¡Insulation defect
¡Repair
¡Replace the fan motor
¡Replace
¡Check the circuit
¡Repair
¡Repair
¡Recharge refrigerant gas
¡Check and repair refrigerant
system
¡Replace
¡Check part of gas Leakage and
repair
¡Repair and recharge
¡Clean the air filter
¡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
¡Replace the defective parts
¡Replace the defective parts
¡Replace the defective parts

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7.HOW TO DISASSEMBLE
1 Before service 1. Stop the unit, remove the power cord from the receptacle.
of any part 2. Remove the Frame Grille from the main unit.
3. Remove the Cabinet from the main unit
2 Fan Motor 1. Remove Frame Grille.
- Remove 2 or 3 Knobs.
2. Remove Vent Lever.
3. Remove Auto Louver.
4. Remove wires.
5. Remove Control Box.
6. Remove Guide Top
- Remove 6 screws.
7. Remove Panel Housing.
- Remove 5 screws
8. Remove cover orifice
- Remove 4 screws
9. Remove clamp Motor.
- Remove 4 screws
10. Remove Panel Housing, Scroll, Fan Motor
and Cond. Orifice assembly from Main unit.
11. Remove Blower Fan
- Remove 1 hex-nut
12. Remove Propeller Fan
- Remove 1 hex-nut
13. Remove Scroll.
14. Remove Panel Housing.
15. Remove Orifice Cond.
3 Control Box 1. Same as the procedure 1 to 5 in disassembling Fan Motor.