Panasonic CW-C180BN User manual

CONTENTS
• PRODUCT SPECIFICATIONS ................................................................................................1
• DIMENSIONS ..........................................................................................................................2
• WIRING DIAGRAM............................................................................................................3 ~ 4
• REFRIGERATION CYCLE DIAGRAM.....................................................................................5
• AIR CONDITIONER PERFORMANCE EVALUATION............................................................5
• HOW TO INSTALL.............................................................................................................6 ~ 7
• HOW TO OPERATE..........................................................................................................8 ~ 9
• TROUBLESHOOTING GUIDE ..............................................................................................10
• CARE AND MAINTENANCE .................................................................................................11
• TECHNICAL DATA...............................................................................................................12
• EXPLODED VIEW .........................................................................................................13 ~ 14
• REPLACEMENT PARTS LIST ..............................................................................................15
• ELECTRONIC CIRCUIT DIAGRAM ......................................................................................16
ORDER NO. MAC9604015C3
Panasonic
Panasonic
CW-C180BN
CW-A180BN
ServiceManual
Room Air Conditioners
MODELS : CW-C180BN, CW-C240SN,
CW-A180BN, CW-A240SN.
© 1996 Matsushita Industrial Corp. Sdn. Bhd.
All rights reserved. Unauthorized copying and
distribution is a violation of law.
CW-C240SN
CW-A240SN

CW-C180BN
– 1 –
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general
public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting
to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians.
Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury
or death.
!
PRODUCT SPECIFICATIONS
MODELS CW-C180BN CW-C240SN CW-A180BN CW-A240SN
COOLING HEATING COOLING HEATING
CAPACITY (Btu/h) 17,900 –17,700 22,700 –22,510 15,690 –15, 510 15,340 –14,830 21,140 –20,630 20,800 –19,780
(W) 5,250 –5,200 6,650 –6,600 4,600 –4,550 4,500 –4,350 6,200 –6,050 6,100 –5,800
MOISTURE REMOVAL (s/h) 2.9 4.0 2.5 –– 3.4 ––
(Pints/h) 6.1 8.5 5.3 7.2
AIR CIRCULATION (m3/min) 14.0 17.0 14.0 16.0
(Cft/min) 490 600 490 560
COMPRESSOR OUTPUT (W) 1,700 2,200 1,700 2,200
ELECTRICAL Phase Single
DATA Cycle (Hz) 50
Voltage (V) 240 –220
Running
Current (A) 11.6 –11.2 15.2 –15.4 11.7 –11.0 9.9 –8.9 14.8 –14.6 13.6 –12.8
Starting
Current (A) 50 60 50 60
Input (W) 2,360 –2,230 3,100 –3,050 2,450 –2,300 1,950 –1,700 3,150 –3,050 2,800 –2,650
CABINET Height (mm) 16 –7/8" (428) 16 –7/8" (428) 16 –7/8" (428) 16 –7/8" (428)
DIMENSIONS Width (mm) 26" (660) 26" (660) 26" (660) 26" (660)
Depth (mm) 25 –7/32" (640) 28 –3/4" (730) 25 –7/32" (640) 28 –3/4" (730)
NET WEIGHT (kg) 59 72 59 74
(Ibs) 130 160 130 164
REFRIGERANT (R-22) (g) 980 1,350 1,090 1,030
(oz) 34.6 47.7 38.5 36.4
NOISE LEVEL High Indoor dB (A) 52 –51 58 –57 52 –51 52 –51 58 –58 ––
Outdoor dB (A) 60 - 59 67 –66 60 –59 61 –60 68 –69 ––
Low Indoor dB (A) 49 –48 54 –53 49 –48 48 –47 54 –54 ––
Outdoor dB (A) 56 –55 66 –63 57 –56 59 –58 65 –65 ––
* Specifications are subject to change without notice for further improvement.
All illustration shown inside caters for models CW-C180BN, CW-A180BN unless stated otherwise

CW-C180BN
–2 –
Panasonic
Panasonic
DIMENSIONS
CW-C180BN
CW-A180BN
CW-C240SN
CW-A240SN
FRONT VIEW
TOP VIEW
13-25/32"
(350)
J
N
SIDE VIEW
F
C
GGH
IK
ITEM CW-C240SN, CW-A240SN
AWidth 26" (660)
BHeight 16 –7/8" (428)
CDepth 28 –25/32" (730)
D26 –25/32" (680)
E1 –31/32" (50)
F11 –13/16" (300)
G2 –3/64" (75)
I3/64" (15)
J10 –13/16" (288)
K15 –11/32" (389.6)
L12 –17/32" (318)
M3 –5/32" (80)
N3 –35/64" (90)
ITEM CW-C180BN, CW-A180BN
AWidth 26" (660)
BHeight 16 –7/8" (428)
CDepth 25 –7/32" (640)
D23 –7/32" (590)
E1 –31/32" (50)
F10 –15/16" (220)
G3 –11/32" (92)
H3 –1/32" (77)
I15 –32" (12)
J10 –15/16" (278)
K1 –1/16" (27)
L12 –17/32" (318)
M3 –5/32" (80)
N3 –35/64" (90)
Unit : (mm)
Unit : (mm)
K
N
N
J
E
I
B13-25/32"
(350)
2-3/32"
(53)
A
FRONT VIEW SIDE VIEW
TOP VIEW
ML
C
FGG
2-3/32"
(53)
ML
A
E
D
D
B

CW-C180BN
–3 –
CW-C180BN
WIRING DIAGRAM
CW-C180BN
CW-C240SN
Connection CWA92125
BLUE–YELLOW 18.8Ω
YELLOW–ORANGE 6.25Ω
RED–YELLOW 51.5Ω
CWA31244
CAPACITOR 3µF, 400VAC
Resistance of Fan Motor windings and rated Capacitor
CW-C240SN
Connection 2JS442D4AA01
C-R 0.95Ω
C-S 4.39Ω
CAPACITOR CWA31338
45µF, 370VAC
* Resistance at 20°C of Ambient Temp.
Resistance of Compressor windings and rated Capacitor
CW-C180BN
Connection CWA95263
BLUE–YELLOW 47.9Ω
YELLOW–ORANGE 25.2Ω
RED–YELLOW 103.3Ω
CWA31357
CAPACITOR 3.5µF, 450VAC
Resistance of Fan Motor windings and rated Capacitor
CW-C180BN
Connection 2JS350D6BA02
C-R 0.95Ω
C-S 4.18Ω
CAPACITOR CWA31504
35µF, 370VAC
* Resistance at 20°C of Ambient Temp.
Resistance of Compressor windings and rated Capacitor
POWER SUPPLY CORD
POWER
SUPPLY
CORD
1ø, 240–220V, 50Hz
1ø,
240–220V,
50Hz
CAPACITOR
CAPACITOR
MAIN SWITCH
MAIN
SWITCH
BROWN
BROWN
1
02
3
AIR SWING
AIR SWING
SELECT SWITCH
SELECT SWITCH
AIR SWING MOTOR
AIR SWING MOTOR
BLUE
BLUE
BLUE
BLUE
BLUE
BLUE
BLUE
BLUE
RED
RED
RED
RED
WHITE
WHITE
BLACK
BLACK
WHITE
WHITE
WHITE
WHITE
YELLOW
YELLOW
YELLOW/GREEN
YELLOW/GREEN
YELLOW/GREEN
YELLOW/GREEN
YELLOW
YELLOW
BLUE
BLUE
BLUE
BLUE
BLACK
BLACK
ORANGE
ORANGE
12
RS
C
FAN MOTOR
FAN MOTOR
COMPRESSOR
COMPRESSOR
THERMOSTAT
THERMOSTAT
RED (RED)
RED (RED)
BLUE (BLU)
BLUE (BLU)
YELLOW (YEL)
YELLOW (YEL)
TRADE MARK
TRADE MARK
THE PARENTHESIZED LETTER IS
INDICATED ON TERMINAL COVER.
INDICATED ON TERMINAL COVER.
COMPRESSOR TERMINAL
COMPRESSOR TERMINAL
FUSE (5A)
FUSE (5A)
P1
CAPACITOR
CAPACITOR
LOW
LOW
FAN
FAN
HIGH
HIGH
FAN
FAN
HIGH
HIGH
COOL
COOL
LOW
LOW
COOL
COOL
OFF
OFF
POWER SUPPLY CORD
POWER
SUPPLY
CORD
1ø, 240–220V, 50Hz
1ø,
240–220V,
50Hz
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
MAIN SWITCH
MAIN
SWITCH
BROWN
BROWN
1
02
3
AIR SWING
AIR SWING
SELECT SWITCH
SELECT SWITCH
AIR SWING MOTOR
AIR SWING MOTOR
BLUE
BLUE
YELLOW/GREEN
YELLOW/GREEN
BLUE
BLUE
BLUE
BLUE
BLUE
BLUE
RED
RED
RED
RED
WHITE
WHITE
WHITE
WHITE
BLACK
BLACK
WHITE
WHITE
WHITE
WHITE
YELLOW
YELLOW
YELLOW/GREEN
YELLOW/GREEN
YELLOW
YELLOW
BLUE
BLUE
BLUE
BLUE
BLACK
BLACK
ORANGE
ORANGE
12
RS
C
FAN MOTOR
FAN MOTOR
COMPRESSOR
COMPRESSOR
THERMOSTAT
THERMOSTAT
(TEMP. CONTROL)
(TEMP.
CONTROL)
THERMOSTAT
THERMOSTAT
(LOW TEMP.)
(LOW
TEMP.)
RED (RED)
RED (RED)
BLUE (BLU)
BLUE (BLU)
YELLOW (YEL)
YELLOW (YEL)
TRADE MARK
TRADE MARK
THE PARENTHESIZED LETTER IS
THE PARENTHESIZED LETTER IS
INDICATED ON TERMINAL COVER.
INDICATED ON TERMINAL COVER.
COMPRESSOR TERMINAL
COMPRESSOR TERMINAL
FUSE (5A)
FUSE (5A)
P
1
LOW
LOW
FAN
FAN
HIGH
HIGH
FAN
FAN
HIGH
HIGH
COOL
COOL
LOW
LOW
COOL
COOL
OFF
OFF
CW-C240SN

CW-C180BN
–4 –
RED (RED)
RED (RED)
BLUE (BLU)
BLUE (BLU)
YELLOW (YEL)
YELLOW (YEL)
TRADE MARK
TRADE MARK
THE PARENTHESIZED LETTER IS
INDICATED ON TERMINAL COVER.
INDICATED ON TERMINAL COVER.
COMPRESSOR TERMINAL
COMPRESSOR TERMINAL
POWER SUPPLY CORD
POWER
SUPPLY
CORD
1ø, 240–220V, 50Hz
1ø,
240–220V,
50Hz
MAIN SWITCH
MAIN
SWITCH
BROWN
BROWN
BROWN
BROWN
BLACK
BLACK
BLACK
BLACK
YELLOW
YELLOW
YELLOW/GREEN
YELLOW/GREEN
BLACK
BLACK
BLACK
BLACK
BLUE
BLUE
BLUE
BLUE
BLUE
BLUE
BLUE
BLACK
RED
RED
RED
RED
YELLOW
YELLOW
YELLOW/GREEN
YELLOW/GREEN
ORANGE
ORANGE
10
2
3
AIR SWING
AIR SWING
SELECT
SELECT
SWITCH
SWITCH
AIR SWING
AIR SWING
MOTOR
MOTOR
BLACK
BLACK
BLUE
BLUE
BLUE
BLUE
BLUE
BLUE
RED
RED
BLUE
BLUE
BLUE
BLUE
RED
RED
RED
RED
GRAY
GRAY
GRAY
GRAY
FAN
FAN
MOTOR
MOTOR
FUSE
FUSE
(5A)
(5A)
4
2
B A
H
C
L
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
COMPRESSOR
COMPRESSOR
THERMOSTAT
THERMOSTAT
COIL-REVERSING
COIL-REVERSING
VALVE
VALVE
ELECTRIC DEICER
ELECTRIC
DEICER
1
2
5
1
P
3
4
6
ZNR
Ry –D
Ry –D
R
C
S
NC
COM
OFF
OFF
LOW
LOW
HIGH
HIGH
HIGH
HIGH
COOL
COOL
HEAT
HEAT
LOW
LOW
FAN
FAN
FAN
FAN
CW-A180BN
Connection CWA95263
BLUE–YELLOW 47.9Ω
YELLOW–ORANGE 25.2Ω
RED–YELLOW 103.3Ω
CWA31357
CAPACITOR 3.5µF, 450VAC
CW-A180BN
Connection 2JS356D6DA01
C-R 0.86Ω
C-S 3.45Ω
CAPACITOR CWA31506
45µF, 370VAC
* Resistance at 20°C of Ambient Temp.
Resistance of Fan Motor windings and rated Capacitor
Resistance of Compressor windings and rated Capacitor
CW-A240SN
Connection CWA92125
BLUE–YELLOW 18.8Ω
YELLOW–ORANGE 6.3Ω
RED–YELLOW 51.5Ω
CWA31244
CAPACITOR 3µF, 400VAC
CW-A240SN
Connection 2JS442D4AA01
C-R 0.95Ω
C-S 4.39Ω
CAPACITOR CWA31506
45µF, 370VAC
* Resistance at 20°C of Ambient Temp.
Resistance of Fan Motor windings and rated Capacitor
Resistance of Compressor windings and rated Capacitor
CW-A180BN
CW-A240SN
RED (RED)
BLUE (BLU)
YELLOW (YEL)
TRADE MARK
THE PARENTHESIZED LETTER IS
THE PARENTHESIZED LETTER IS
INDICATED ON TERMINAL COVER.
INDICATED ON TERMINAL COVER.
COMPRESSOR TERMINAL
POWER SUPPLY CORD
POWER
SUPPLY
CORD
1ø, 240–220V, 50Hz
1ø,
240–220V,
50Hz
MAIN SWITCH
MAIN
SWITCH
BROWN
BROWN
BROWN
BROWN
BLACK
BLACK
BLACK
BLACK
BLACK BLACKBLACK
YELLOW
BLUE
BLUE
YELLOW/GREEN
BLUE
BLACK
RED
RED
YELLOW
YELLOW
YELLOW/GREEN
YELLOW/GREEN
ORANGE
ORANGE
10
2
3
AIR SWING
SELECT
SWITCH
AIR SWING
MOTOR
BLACK
BLACK
BLUE
BLUE
BLUE
BLUE
BLUE
RED
RED
BLUE
BLUE
BLUE
BLUE
RED
RED
RED
RED
GRAY
GRAY
GRAY
GRAY
BLACK
BLACK
FAN
FAN
MOTOR
MOTOR
FUSE (5A)
4
2
B A
H
C
L
CAPACITOR
CAPACITOR
THERMOSTAT
THERMOSTAT
CAPACITOR
CAPACITOR
COMPRESSOR
COMPRESSOR
THERMOSTAT
THERMOSTAT
COIL-REVERSING
COIL-REVERSING
VALVE
ELECTRIC DEICER
ELECTRIC
DEICER
4
4
1
1
P
3
2
S2
S2
S1
S1
ZNR
ZNR
Ry –D
Ry –D
R
C
S
NC
NC
COM
COM
OFF
OFF
LOW
LOW
HIGH
HIGH
HIGH
HIGH
COOL
COOL
HEAT
HEAT
LOW
LOW
FAN
FAN
FAN
FAN

CW-C180BN
–5 –
REFRIGERATION CYCLE DIAGRAM
2
6
B
C
A
5
D
CW-A180BN
CW-A240SN
ITEM PRESSURE (kg/cm2) TEMP. (°C)
A 15.5 ~ 19.0 55 ~ 70
B 4.0 ~ 4.5 0 ~ 5
C 15.0 ~ 18.5 37 ~ 47
D 15.4 ~ 18.9 45 ~ 55
* Indoor temp. at 21°C (DB), and Outdoor at 7°C (DB), 6°C (WB).
ITEM PRESSURE (kg/cm2) TEMP. (°C)
A 17.5 ~ 21.0 75 ~ 90
B 17.2 ~ 20.7 38 ~ 45
C 5.5 ~ 6.1 7 ~ 15
D 5.3 ~ 5.8 5 ~ 15
* Indoor temp. at 27°C (DB), 19°C (WB) and Outdoor at 35°C , 24°C.
1
43
SUCTION & DISCHARGE AIR CURRENT DETERMINATION REMEDY
TEMPERATURE DIFFERENCE
12°C and over As specified •Nothing wrong •None
12°C and over Higher than specified •Nothing wrong, outdoor temperature •None
is high
•Something is preventing heat •Clean air-filter
radiation at indoor heat-exchanger
Under 12°C Lower than specified •Nothing wrong, outdoor temperature •None
is too low
•Something is preventing heat •Improve heat radiation at outdoor
radiation at outdoor heat-exchanger heat-exchanger
•Leakage of refrigerant •Locate & repair leak
•Refrigerant system is blocked •Flush refrigeration leak
Under 12°C Higher than 150% of specified •Compressor defect •Replace compressor
•Compressor capacitor defect •Replace compressor capacitor
1Compressor
24-Way Valve
3Evaporator
4Capillary Tube
5Strainer
6Condenser
7Accumulator
HEATING
COOLING
ITEM PRESSURE (kg/cm2) TEMP. (°C)
A 18.5 ~ 22.0 80 ~ 95
B 18.2 ~ 21.7 44 ~ 52
C 5.7 ~ 6.3 7 ~ 15
D 5.5 ~ 6.0 6 ~ 16
1Compressor
2Condenser
3Strainer
4Capillary Tube
5Evaporator
6Accumulator
CW-C180BN
CW-C240SN
34
2
7
6
C
A
1
B
5
D
HEATING
COOLING
* Note: Room air humidity is relatively higher, the Temp. difference will be smaller.
* Indoor temp. at 27°C (DB), 19°C (WB) and Outdoor at 35°C , 24°C.
SUCTION & DISCHARGE AIR CURRENT DETERMINATION REMEDY
TEMPERATURE DIFFERENCE
8°C and over As specified Nothing wrong •None
8°C and over Higher than specified Nothing wrong, outdoor temperature is •Improve heat radiation
too high, heat radiation is not efficient
Under 8°C Higher than specified but below Something is preventing heat radiation •Excessive amount of refrigerant
150% of specified •Improve heat radiation
Under 8°C Lower than specified Leakage of refrigerant or refrigerant •Locate repair leak
system is blocked •Flush refrigeration cycle
Under 8°C Higher than 150% of specified Compressor defect or compressor •Replace the compressor or
capacitor defect compressor capacitor
HEATING
AIR CONDITIONER PERFORMANCE EVALUATION
COOLING

CW-C180BN
–6 –
Over
15 cm
Over
15 cm
66 cm
43 cm
Front Grille
Less than
22 cm
Outdoor
(wall) Over
50 cm
Fence or
likewise
Indoor
Ceiling (TOP VIEW)
Outdoor
Over
15 cm
Over 50 cm
Over
15 cm
Indoor
(wall)
Fence or
likewise
(SIDE VIEW)(FRONT VIEW)
Please read the following before installing the Air Conditioner.
Select the best location for the most efficient cooling.
Location
•The air conditioner should be installed in a dry place where there are no draughts.
•Condensation from the air conditioner must be drained to an appropriate location.
•Do not install in a location where flammable gas leaks are a possibility.
•Using in locations where the air is salty such as beside the sea or near hot spas, or
where sulphurous gas is generated, may lead to a malfunction. Please consult your dealer.
•Select a installation location which is rigid and strong enough to support or hold the unit and select a
location for easy maintenance.
How to install
•There should not be any obstacles surrounding the unit.
•Prepare the installation hole slightly bigger than cabinet size.
1) PREPARE CHASSIS
•Remove chassis locking bracket by loosening the screw.
•Slide the chassis out from the cabinet.
2) Place cabinet into opening and secure it by wood screws or
nails.
•The cabinet should be installed tilted slightly lower to the
rear for necessary condensate drainage. (Max. 10mm).
3) Slide Chassis into the cabinet which installed the above 2.
•The tubings or ducting part should not touch the cabinet
4) Lock the chassis into cabinet by chassis locking bracket.
5) Place FRONT GRILLE onto CABINET by screws.
•To place the grille, hook top of grille onto top of cabinet, push
bottom of grille in until it snaps into place. Secure the Front Grille
with the screws at the right, left and center of the grille.
GrilleCabinet
To place the Grille
Chassis
Locking
Bracket
HOW TO INSTALL

CW-C180BN
–7 –
HOW TO INSTALL
3. Drain Water....
To get the maximum cooling efficiency this air conditioner is designed to splash the condensate on the condenser coil.
This method is called “Slinger-Up System”. (For cooling model only)
If the splashing sound annoys you, you can provide an outside drain by using the following procedure which may, however cause
a small loss of performance.
1. Slide out the chassis from the cabinet.
2. Remove the rubber plug from the body base plate. (For cooling model only)
3. Install the drain pan prepared in the accessory kit to the corner of the cabinet with 2 screws.
4. Connect the drain hose to the outlet on the drain pan bottom.
5. Slide the chassis into its original place in the cabinet.
Note: Drain hose or tubing can be purchased locally to satisfy your particular needs.
4. Plug line cord into wall receptacle.
<240–220V, 50Hz>
•Power should be from independent circuit.
•Nominal cross sectional area of power supply wire must be 3 core x 2.5 mm2or above.
EXTERNAL VIEW
INTERNAL VIEW
SCREWS
DRAIN PAN
DRAIN HOSE
Install drain pan at left corner of cabinet.
EXTERNAL VIEW
INTERNAL VIEW
Install drain pan at right corner of cabinet.
SCREWS
(CW-C180BN, CW-A180BN) (CW-C240SN, CW-A240SN)
DRAIN PAN
DRAIN HOSE

CW-C180BN
–8 –
°C
1. Power Supply
Set the Main Control Knob to the “”OFF
position; confirm that the power supply cord is
connected to a proper AC outlet.
Recommended
Use the air conditioner under
the following conditions:
•Operating temperature range.
(unit in °C)
Indoor unit Outdoor unit
D.B.T. W.B.T. D.B.T. W.B.T.
Maximum
Temperature
Minimum
Temperature D.B.T.: Dry Bulb Temperature
W.B.T.: Wet Bulb Temperature
•Humidity does not exceed 90%.
Continuous operation at over 90% humidity
may create condensation and waterdrops on
the intake and outlet vents.
32 23 43 26
21 15 21 15
Illustration
only for
CW-C180BN
2. Open the
cover
3. Main Control Knob
Set to either “”LOW COOL or “”HIGH
COOL as required.
(FAN setting operates the fan only.)
* Caution: If the Main Control Knob is turned
off or changed to a fan setting from a cooling
operation setting, WAIT at least 3 minutes
before resetting to a cooling operation.
4. Thermostat Control Knob
Set the Thermostat Control Knob at the
desired setting. (Usually “~ ”is a
recommended setting position.) If the room
temperature is unsatisfactory after a
reasonable amount of time, turn the control
knob clockwise to cool the room more, or
anticlockwise to cool the room less.
•When the Thermostat Control Knob is set to
“”, moisture may freeze onto the coils and
prevent effective cooling. If this happens, turn
the knob to “”HIGH FAN, and the thermostat
control knob anticlockwise. This will quickly
defrost the cooling coil so that normal cooling
can be resumed.
5. Air Swing Switch
(Airflow direction adjustment
Side-to-Side)
For fixed side-to-side air direction, set the Air
Swing Switch to “”ON until the desired air
direction is obtained, then move it to “”OFF.
For continuous side-to-side air circulation, set
the Air Swing Switch to “”ON and leave it
there.
HOW TO OPERATE
CW-C180BN, CW-C240SN (Cooling Only)

CW-C180BN
–9 –
°C
1. Power Supply
Set the Main Control Knob to the “”OFF
position; confirm that the power supply cord is
connected to a proper AC outlet.
32 23 43 26
21 15 21 15
Recommended
Use the air conditioner under
the following conditions:
•Operating temperature range. (unit in °C)
Indoor unit Outdoor unit
D.B.T. W.B.T. D.B.T. W.B.T.
Maximum
Temperature
Minimum
Temperature
Maximum
Temperature
Minimum
Temperature D.B.T.: Dry Bulb Temperature
W.B.T.: Wet Bulb Temperature
•Humidity does not exceed 90%.
Continuous operation at over 90% humidity
may create condensation and waterdrops on
the intake and outlet vents.
HEATING COOLING
27 –21 15
20 –-5 -6
2. Open the
cover
3. Main Control Knob
Set to either “”LOW COOL or “”HIGH
COOL and “”LOW HEAT or “”HIGH
HEAT as required.
(FAN setting operates the fan only.)
* Caution: If the Main Control Knob is turned
off or changed to a fan setting from a cooling
or heating operation setting, WAIT at least 3
minutes before resetting to a cooling or
heating operation.
4. Thermostat Control Knob
Set the Thermostat Control Knob to the desired
setting. (Usually “~ ”(Red) is a
recommended setting for heating and “~ ”
(Blue) for cooling.) If the room temperature is
unsatisfactory after a reasonable amount of
time, turn the control knob clockwise or anti-
clockwise to make the room cooler or warmer.
•When the Thermostat Control Knob is set to
“ ” (Blue), moisture may freeze onto the coils
and prevent effective cooling. If this happens,
turn the knob to “”(Gray) FAN, and the
thermostat control knob anticlockwise. This will
quickly defrost the cooling coil so that normal
cooling can be resumed.
5. Air Swing Switch
(Airflow direction adjustment
Side-to-Side)
For fixed side-to-side air direction, set the Air
Swing Switch to “”ON until the desired air
direction is obtained, then move it to “”OFF.
For continuous side-to-side air circulation, set
the Air Swing Switch to “”ON and leave it
there.
HOW TO OPERATE
CW-A180BN, CW-A240SN (Cooling & Heating)

CW-C180BN
–10 –
TROUBLE CHECK RESULT CAUSE REMEDY
Fan Motor and 1. Supply Voltage. Less than - 10% by Rated. Customer Restarted unit Consult ELECTRICIAN.
Compressor 2. Fuse Box or Circuit Breaker. Open Contacts. immediately without Repair Open Circuit.
won’t run. waiting 3 minutes WAIT FOR 3 MINUTES.
3. Power cord or Wiring Harness. Pulled loose or Shorted. Repair or Replace it.
4. Thermostat Setting. Higher thanROOM TEMP. Set it LOWER.
Fan Motor 1. Objects around Fan. Locked Fan. Fan Hitting Cowling or Adjust Fan Position set screw.
won’t run Foreign Materials. Remove Foreign Materials.
Frozen Bearings. Replace Fan Motor.
2. RESISTANCE between Wires. Shorted/Open circuit. Shorted or Burned out. Replace Fan Motor.
3. Capacitor Fan Motor. OHM Meter doesn’t Deflect. Capacitor Defect. Replace Capacitor Fan.
4. Main Control Switch. No contacts at Position Shown. Main Control Switch defect. Replace Main Control Switch.
Compressor 1. Thermostat Setting. Higher than ROOM TEMP. Set it lower.
won’t run 2. RESISTANCE between Shorted. Winding Coil touched to the Replace Compressor.
(Fan runs) Terminal and the Body.
Compressor Body.
3. RESISTANCE between Shorted. Rear Shorted or Burnt out. Replace Compressor.
Terminals.
4. Overload Protector. Infinity between Terminals. Overload protector defect. Replace Overload Protector.
5. Capacitor Compressor. OHM Meter doesn’t deflect. Capacitor defect. Replace Capacitor Comp.
6. Thermostat. No CLICK around position. Thermostat defect. Replace Thermostat.
7. Main Control Switch. No contacts at Position shown. Main Control Switch defect. Replace Main Control Switch.
Insufficient 1. Thermostat Setting.
Higher or lower than ROOM TEMP. Set it lower or higher.
cooling or 2. Ventilation Door open. Open. Reduces capacity. Close Vent door.
heating 3. Air Filter dirty. Clogged or Dirty. Restricted air circulation. Clean or Replace Air Filter.
4. Location of installation. Sunlight hitting outdoor side Restricted Heat Exchanger Consider building an AWNING.
at cooling.
Obstacles. Restricted Heat Exchanger. Remove obstacles or
reinstall unit.
5. Evaporator/Condenser Clogged or Dirty. Restricted air circulation. Clean by steam cleaner.
Coil obstructed.
6. Unit capacity for the room too Not Satisfied. Replace the Unit with
small. bigger one.
7. Temp difference and REFER PERFORMANCE Leakage of refrigerant or Locate repair leak.
Running Current. EVALUATION. refrigeration system is blocked. Flush refrigeration cycle.
Noise 1. Source of Noise. Vibration. Faulty installation. Reinstall unit or Reinforce
the installation.
Intermittent Noise. Fan hitting objects. Adjust Fan position or
remove Foreign Materials.
Refrigerant tubing touching About 1/2" Clearance.
each other.
Fan splashing Drain Water. Consider Attaching the Drain
Pan and pull plug in bottom
pan. (REFER INSTALLATION
INSTRUCTIONS)
No heating 1. Reversing Valve Coil. Infinity between Coil. Replace Reversing Valve coil.
(Fan and 2. Reversing Valve. Resistance between Reversing Replace Reversing Valve.
Compressor run.) Valve Coil.
Water dripping 1. Unit Installation. Tilted to inside room. Restricted run off. Tilt unit to outside slightly.
inside room 2. Drain Tray-STYROFOAM Clogged. Clogged or blocked. Remove the foreign materials.
Pieces blocking Drain (REFER OPERATING
Channel. INSTRUCTIONS)
Frozen 1. Thermostat Setting Set too low for ambient Outdoor TEMP. Low Set Main Control Switch to
Evaporator conditions. (Night time) Fan to melt ICE and Set the Temp.
control to higher temperature
2. Air Filter/Evaporator. Clogged or Dirty. Restricted air circulation Clean Air Filter/Evaporator.
3. Temp. difference and REFER PERFORMANCE Leakage of refrigerant or Locate repair leak.
Running Current. EVALUATION. refrigeration system is blocked. Flush refrigeration cycle.
Frozen 1. Outdoor ambient Heating Operation at Low Outdoor ambient temp. Set Main Control Switch
Condenser temp. outdoor ambient temp. is Low. to Fan to melt ICE.
TROUBLESHOOTING GUIDE
WARNING: DISCONNECT UNIT FROM ELECTRICAL POWER SUPPLY BEFORE MAKING ANY ELECTRICAL
CHECKS.
DISCHARGE THE CAPACITOR BEFORE CHECKING IT.

CW-C180BN
–11 –
Always turn off the air conditioner and main power supply before cleaning to ensure safety.
CARE AND MAINTENANCE
Air Filter
The air filter behind the intake grille should be
washed at least every two weeks or as often as it
needs cleaning.
HOW TO CLEAN THE AIR FILTER:
1. To remove the air filter, grasp the tab on the filter
and pull to the right.
2. Vacuum the filter on the dusty side to remove
light dust.
3. Wash the filter, cleaner side up under gently flowing
water to wash out accumulated dust and lint.
4. If the filter is very dirty, use a mild household
detergent in the wash water.
Let the filter dry thoroughly before reinstalling it.
When reinstalling the filter, be sure the word “FRONT”
is facing you as you slide the filter back into place.
Front Grille
Clean the front grille with a clean cloth lightly
dampened with mild liquid dish-washing detergent.
Caution
Wipe off dirt with a soft, dry cloth (use a vacuum
cleaner to remove dust from the air intake.)
Use a cloth and water less than 40°C to remove
stubborn dirt (the cloth should be well-wrung).
Do not use the following cleansers as they cause
the paint to peel and lead to malfunctions:
Benzene, thinner, scouring powder, chemical-
soaked cloths, etc.
lukewarm water +
mild detergent
Vacuum cleaner
B
E
N
Z
E
N
E
T
H
I
NN
E
R
Cabinet
Clean the cabinet with mild soap or detergent and
lukewarm water.
Annual check
* After long-term usage of room air conditioners, dust
and dirt will accumulate inside, lowering the perform-
ance. This may cause the generation of odour or may
impede the drainage of the dehumidifying water.
* Besides regular cleaning of the air conditioner, a
separate annual check is also recommended
(chargeable). Please request your dealer to carry out
these checks.
–11 –

CW-C180BN
–12 –
TECHNICAL DATA
•Operation Characteristics
CW-C180BN
Cooling Characteristic
s12.5
Voltage at 240–220V
11.5
10.5
s
O : Outlet
Air Temperature (
o
C)
s
I:
Current (A) Q :
Cooling Capacity (KW)
30 35 40
Outdoor Air Temperature (oC)
Voltage at 240–220V
Voltage at 240–220V
CW-C240SN
Cooling Characteristic
CW-A180BN
Cooling Characteristic
CW-A240SN
Cooling Characteristic
Heating Characteristic
Heating Characteristic
s50.0
Voltage at 240–220V
40.0
30.0
O : Outlet
Air Temperature (
o
C)
I:
Current (A) Q :
Heating Capacity (KW)
-2 7 15
Outdoor Air Temperature (oC)
s
s
Voltage at 240–220V
s11.5
Voltage at 240–220V
11.0
10.5
O : Outlet
Air Temperature (
o
C)
Q :
Cooling Capacity (KW)
30 35 40
Outdoor Air Temperature (oC)
s
s
12.5
11.5
10.5
6.0
5.0
4.0
16.0
15.0
14.0
8.0
7.0
6.0
s13.0
12.0
11.0
s
O : Outlet
Air Temperature (
o
C)
s
I:
Current (A) Q :
Cooling Capacity (KW)
30 35 40
Outdoor Air Temperature (oC)
12.0
11.0
10.0
5.0
4.5
4.0
Q
O
I
s
O : Outlet
Air Temperature (
o
C)
I:
Current (A) Q :
Cooling Capacity (KW)
30 35 40
Outdoor Air Temperature (oC)
s
s
7.0
6.0
5.0
Q7.0
6.0
5.0
14.0
13.0
12.0
Q
O
I
s50.0
40.0
30.0
O : Outlet
Air Temperature (
o
C)
I:
Current (A) Q :
Heating Capacity (KW)
-2 7 15
Outdoor Air Temperature (oC)
s
s
5.5
4.5
3.5
11.0
10.0
Q
O
9.0 I
I
Q
OO
Q
I
16.0
14.0
12.0
12.0
11.0
10.0
I
O
I:
Current (A)

CW-C180BN
–13 –
•The above exploded view is for the purpose of parts disassembly and replacement.
The non-numbered parts are not kept as standard service parts.
121
211
501
102
103
131
116
148
CW-C180BN, CW-A180BN
EXPLODED VIEW
CW-C180BE
106
712
210
212
122
217
323
300
703
312
146
610
710
145
123
120
135
101
207
200
202
144 147 128
308
304
109
129
311
306
125
508
509
507
500
220
707
502
505
100
130
600
117
112 205
203
310 329 126
326
303
124
302
711
201
702
707
707
613

CW-C180BN
–14 –
CW-C240SN, CW-A240SN
EXPLODED VIEWEXPLODED VIEW
•The above exploded view is for the purpose of parts disassembly and replacement.
The non-numbered parts are not kept as standard service parts.
147
329

CW-C180BN
–15 –
REF.NO. DESCRIPTION & NAME QTY CW-C180BN CW-A180BN CW-C240SN CW-A240SN
100 BASE PAN ASS'Y 1 CWD52K226A CWD52K225A CWD52K183A CWD52K193A
101 BULKHEAD 1 CWD53K093 ←CWD53K087 CWD53K083
102 AIR GUIDER-PROPELLER FAN 1 CWD31092 ←CWD31K037 CWD31075
103 BRACKET-FAN MOTOR 1 CWD54091 ←CWD54142 ←
106 TOP PLATE ASS'Y 1 CWD64K036 ←CWD64k029 ←
108 COVER-EVAPORATOR 1 –– –– CWD11030 ←
109 DRAIN TRAY-EVAPOPATOR 1 CWH40166 ←–– ––
110 AIR GUIDER-B. WHEEL (BOTTOM) 1 –– –– CWD32099 ←
111 AIR GUIDER-B. WHEEL (UPPER) 1 –– –– CWD32098 ←
112 HOLDER-VENT. LEVER 1 CWD91021 ←CWD66156 ←
113 VENTILATION LEVER 1 –– –– CWH22004 ←
114 VENTILATION DOOR 1 –– –– CWH21012 ←
116 CONNECTING BAR-A. SWING VANES 1 CWE26139 ←CWE26092 ←
117 VANE-AIR SWING 2 CWE24314 ←CWC24210 ←
118 GUIDER-A. SWING VANES 1 –– –– CWE26106 ←
120 BLOWER WHEEL ASS'Y 1 CWH01K052 ←CWH01K056 ←
121 PROPELLER FAN 1 CWH00009 ←←←
122 NUT-P. FAN 1 CWH56033 ←←←
123 CONTROL BOARD (AUX.) 1 CWD60384 ←CWH10K337 ←
124 HOLDER-CAPACITOR (COMP.) 1 CWH30133 CWH30102 CWH30101 ←
125 CONTROL BOARD (MAIN) 1 CWH10772 CWH10899 CWH10666 CWH10666
126 HOLDER-CAPACITOR (FAN) 1 CWH30132 ←–– ––
127 HOLDER-SENSOR 1 –– –– –– CWH32048
128 HOLDER-SENSOR 1 CWH32085 CWH32086 CWH4690379 ←
129 DRAIN PLUG-BASE PAN 1 CWH4611062 –– CWH4611062 ––
130 CHASSIS LOCKING BRACKET 1 CWD93302 ←← ←
131 VENTILATION ASS'Y 1 CWH22007 ←–– ––
135 AIR GUIDER-B. WHEEL 1 CWD32124 ←–– ––
144 AIR GUIDER-B. WHEEL (FRONT) 1 CWD32126 CWD32126 (A) –– ––
145 RECTIFICATION PLATE 1 CWD21008 ←–– ––
146 SPLASH WATER PROOF LOUVER 1 CWD91029A –– –– ––
147 FUSE HOLDER 1 XCSCW011 –– XCSCW011 ←
148 BOX FOR AIR-SWING MOTOR 1 CWD66191 ←–– ––
200 COMPRESSOR 1 2JS350D6BA02 2JS356D6DA01 2JS442D4AA01 ←
(B09567) (CWB09525) (B09374)
201 BUSHING-COMP. MOUNT. 3 CWH50055 ←← ←
202 NUT-COMP. MOUNT. 3 CWH4582065 ←←←
203 GASKET-TERMINAL COVER 1 CWH7070603 ←–– ––
205 TERMINAL COVER-COMP. 1 CWH7070206 ←← ←
207 NUT-TERMINAL. COVER 1 CWH7080300 ←← ←
210 CONDENSER 1 CWB32604 CWB32484 CWB32C073 CWB32C095
211 STRAINER 1 CWB11025 ←← ←
212 CAPILLARY TUBE 2 CWB15491 (2) CWB15363 CWB15315 (1) CWB15589 (2)
217 4-WAY VALVE 1 –– CWB00003 –– CWB00003
220 EVAPORATOR 1 CWB30C049 ←CWB30C004 CWB30C015
300 FAN MOTOR 1 CWA95263 ←CWA92125 ←
302 CAPACITOR-FAN 1 CWA31357 ←CWA31244 ←
(3.5µF, 450VAC) (3µF, 400VAC)
303 CAPACITOR-COMP. 1 CWA31504 CWA31506 ←←
(35µF, 370VAC) (45µF, 370VAC)
304 MAIN CONTROL SWITCH 1 CWA07034 CWA07040 CWA07034 CWA07043
306 SWITCH-AIR SWING 1 CWA05024 ←←←
308 THERMOSTAT ROOM 1 CWA15122 CWA15123 CWA15122 CWA15123
310 TERMINAL BOARD 1 CWA4711013 CWA4711060 CWA4711013 ←
310-1 TERMINAL BOARD 1 –– –– –– CWA4711022
311 POWER SUPPLY CORD 1 CWA20C538 CWA20C643 CWA20C539 CWA20C481
312 AIR SWING MOTOR 1 CWA98K067 ←CWA98K046 ←
322 SWITCH-LOW TEMP CUT 1 –– –– CWA15005 ←
323 COIL-4 WAY VALVE 1 –– CWA43C365 –– CWA43C356
326 DEICER 1 –– CWA17004 –– CWA17004
329 FUSE 1 XBA2C50TR0 CWA16C158 XBA2C50TRO ←
500 FRONT GRILLE COMPLETE 1 CWE11C697 ←←←
501 AIR FILTER 1 CWD00157D ←← ←
502 GRILLE DOOR ASS'Y 1 CWE14K046 ←←←
503 HINGE-G. DOOR 2 CWH61029E ←← ←
505 VANE 14 CWE24301D ←←CWE24301D
507 LINK-VANES 1 CWE26136 ←← ←
508 CONTROL ESCUTCHEON 1 CWE311086 CWE311085 CWE311073 CWE311113
509 KNOB-TURNING 2 CWE17C076 ←←←
600 CABINET COMPLETE 1 CWE00C121 CWE00C124 CWE00C120 ←
610 DRAIN PAN 1 CWH40077 ←← ←
613 SOUND PROOF-COMP. 1 CWG30377 –– CWG30377 ––
702 SCREW-BRACKET FAN MOTOR 4 CWH55039 ←← ←
703 SCREW-BLOWER WHEEL 1 CWH4580326 ←← ←
707 SCREW-F. GRILLE MOUNT. 1 CWH82C163 ←←←
710 SCREW-DRAIN PAN 1 CWG86C733 ←← ←
711 SCREW-C. LOCKING BRACKET 1 XTT4+8B ←←←
712 SCREW-UNIT INSTALLATION 1 CWG86C280 ←← ←
OPERATING INSTRUCTIONS 1 F561189 ←←←
All parts are supplied from MAICO, Malaysia (Vendor Code : 061).
•The above parts are kept for seven years in accordance with MEI service policy.
However, longer lead time will be taken in supplying the non-numbered parts.
REPLACEMENT PARTS LIST

CW-C180BN
–16 –
ELECTRONIC CIRCUIT DIAGRAM
•CW-A180BN, CW-A240SN
(DEICER SCHEMATIC DIAGRAM)
D2
F14A
6.8
12.0
T
CWA40164
2SC1318
DB1
SIVB10
10.0 VAC
ZNR
ERZC10DK471
IC
0.7
(0)
1 RED
2 BLUE
3 BLACK
4 YELLOW
NC
COM
NO
R2
6.8KΩ
VCC
GND
AN6710
+C3
10V
33µF
R4
4.87KΩ
R6
7.5KΩ+C4
16V
10µF
PIPING TEMP. SENSOR
~~
7
90
(6.0)
C6
50V
4700PF
+C1
16V
470µF
R1
130Ω
1W
POWER
OSC
PIPE
TEMP.
COUNTEROUTPUT
+
QRy
685
42
31
10 11 12 13 14
ZD
RD6. 8FB
16
15
R8
7.5KΩ
R5
5.1KΩ
R7
7.5KΩ
R3
2.7KΩ
0 (12.0)
+C2
10V
100µF
C5
50V
0.01µF

MAICO Printed in Malaysia
F960500100TH