Panasonic CW-C241SE User manual

CONTENTS
• PRODUCT SPECIFICATIONS ................................................................................................1
• DIMENSIONS ..........................................................................................................................2
• WIRING DIAGRAM..................................................................................................................2
• REFRIGERATION CYCLE DIAGRAM.....................................................................................3
• AIR CONDITIONER PERFORMANCE EVALUATION............................................................3
• HOW TO INSTALL.............................................................................................................4 ~ 5
• HOW TO OPERATE................................................................................................................6
• TROUBLESHOOTING GUIDE ................................................................................................7
• CARE AND MAINTENANCE ...................................................................................................8
• EXPLODED VIEW ...................................................................................................................9
• REPLACEMENT PARTS LIST ..............................................................................................10
ORDER NO. MAC9607030C3
© 1996 Matsushita Industrial Corp. Sdn. Bhd.
(11969 - T)
All rights reserved. Unauthorized copying and
distribution is a violation of law.
MODEL : CW-C241SE
ServiceManual
Room Air Conditioner
Panasonic

– 1 –
CW-C241SE
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.
Precaution of Low Temperature
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigeration circuit.
PRODUCT SPECIFICATIONS
MODEL
CAPACITY (Btu/h) 22,510–22,510
(W) 6,600–6,600
MOISTURE REMOVAL (s/h) 4.0
(Pints/h) 8.5
AIR CIRCULATION (m3/min) 17.0
(Cft/min) 600
ELECTRICAL DATA Phase Ø Single
Cycle (Hz) 50
Voltage (V) 230–220V
Running Current (A) 14.5–14.4
Starting Current (A) 60
Input (W) 3,000–2,950
COMPRESSOR OUTPUT (W) 2,200
CABINET Height (mm) 16–7/8" (428)
DIMENSIONS Width (mm) 26" (660)
Depth (mm) 28–3/4" (730)
NET WEIGHT (kg) 72
(lbs) 160
REFRIGERANT (R–22) (g) 1,350
(oz) 47.7
58–57
CW-C241SE
NOISE LEVEL
High
Low
Indoor (dB)
Outdoor (dB)
Indoor (dB)
Outdoor (dB)
* Specifications are subject to change without notice for further improvement.
67–66
54–53
64–63

CW-C241SE
DIMENSIONS
– 2 –
ITEM CW-C241SE
AWidth 26" (660)
BHeight 16 – 7/8" (428)
CDepth 28 – 3/4" (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)
Unit : (mm)
K
N
N
J
B
A
FRONT VIEW
TOP VIEW
ML
Panasonic
EFG
2-3/32"
(53)
13-25/32"
(350)
C
I
SIDE VIEW
D
G
WIRING DIAGRAM
ORANGE
YELLOW
Resistance of Fan Motor windings and rated Capacitor
Resistance of Compressor windings and rated Capacitor
POWER SUPPLY CORD
1Ø, 230-220V, 50Hz
COMPRESSOR
12
1
2
4
0
MAIN SWITCH
AIR SWING
SELECT SWITCH
AIR SWING
MOTOR
YELLOW/GREEN
3
BROWN
YELLOW/GREEN
BLUE
FUSE (5A)
1 P
BLUE
BLUE
BLACK WHITE
WHITE
BLACK
BLUE BLUE
WHITE
RED
BLUE
CAPACITOR
RED BLUE
R S
CYELLOW
CAPACITOR
THERMOSTAT
(LOW TEMP.)
THERMOSTAT
(TEP. CONTROL)
FOR MODEL
CW-C241SE
ONLY
COMP. TERMINAL
YELLOW (C)
BLUE (R) RED (S)
TRADE MARK
BROWN
FAN MOTOR
CW-C241SE
Connection 2JS438D4AA02
C-R 0.95
C-S 4.39
CAPACITOR CWA31539
45µF/370VAC
CW-C241SE
Connection CWA92125
BLUE–YELLOW 18.8
YELLOW–ORANGE 6.25
RED–YELLOW 51.5
CAPACITOR CWA31244
3µF/400VAC
* Resistance at 20°C of Ambient Temp.

CW-C241SE
– 3 –
* Indoor temp. at 27°C (DB), 19°C (WB) and
Outdoor at 35°C , 24°C.
REFRIGERATION CYCLE DIAGRAM
2
61
BC
A
43
5
DITEM 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
1Compressor
2Condenser
3Strainer
4Capillary Tube
5Evaporator
6Accumulator
AIR CONDITIONER PERFORMANCE EVALUATION
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 • improve heat radiation
temperature is too high, heat
radiation is not efficient.
under 8°C higher than specified something is preventing heat • excessive amount of refrigerant
radiation • improve heat radiation
under 8°C lower than specified leakage of refrigerant or • locate repair leak
refrigerant system is blocked • flush refrigeration cycle
under 8°C higher than specified by 50% compressor defect • replace the compressor
* Note: Room air humidity is relatively higher, the Temp. difference will be smaller.

CW-C241SE
– 4 –
Panasonic
HOW TO INSTALL
Please read the following before installing the Air Conditioner.
Select the best location for the most efficient cooling.
1. 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 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.
• Ensure that the wall is strong enough to support the unit.
2. 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
inuntilit snapsintoplace. SecuretheFront Grillewiththe screwsatthe right,
left and centre of the grille.
(FRONT VIEW) (SIDE VIEW) (TOP VIEW)
(wall)
Outdoor
Front Grille
Over
15cm
Over
15 cm
Fence or
likewise
Ceiling
66 cm
Less than
24 cm Indoor
(wall) Outdoor
Over
15cm
Fence or
likewise
Over
15cm
Over 50cm
Chassis
Locking
Bracket
Grille
Cabinet
To place the Grille
Over
50 cm
42.8 cm
Indoor

CW-C241SE
– 5 –
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”.
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.
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.
<230–220V, 50Hz>
• Power should be from independent circuit.
EXTERNAL VIEW
INTERNAL VIEW
BOTTOM-SIDE VIEW WITH DRAIN
PAN AND HOSE IN PLACE
SCREWS
DRAIN PAN
DRAIN HOSE
Install drain pan at left corner of cabinet.

CW-C241SE
– 6 –
°C
HOW TO OPERATE
4.Thermostat Control Knob
Set the Thermostat Control Knob at the
desired setting. (Usually “~ ”is a
recommended setting position.) If the room
temperatureis unsatisfactoryafter 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.
2. Open the
cover
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
3.Main Control Knob
Set to either “”LOW COOL or “”HIGH
COOL as required.
(FAN setting operates the fan only.)
* Caution:If theMainControl Knobis turned off
or changed to a fan setting from a cooling
operation setting, WAIT at least 3 minutes
before resetting to a cooling operation.

CW-C241SE
–7 –
TROUBLESHOOTING GUIDE
WARNING: DISCONNECT UNIT FROM ELECTRICAL POWER SUPPLY BEFORE MAKING ANY ELECTRICAL
CHECKS.
DISCHARGE THE CAPACITOR BEFORE CHECKING IT.
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 Open Contacts. immediately without Repair Open Circuit.
won’t run. Breaker. waiting 3 minutes WAIT FOR 3 MINUTES.
3. Power cord or Wiring Pulled loose or Shorted. Repair or Replace it.
Harness.
4. Thermostat Setting. Higher thanROOM TEMP. Set it LOWER.
Fan Motor 1. Objects around Fan. Locked Fan. Fan Hitting Cowling or AdjustFan Positionset screw.
won’t run Foreign Materials. Remove Foreign Materials.
Frozen Bearings. Replace Fan Motor.
2. RESISTANCE between Shorted/Open circuit. Shorted or Burned out. Replace Fan Motor.
Wires.
3. Capacitor Fan Motor. OHM Meter doesn’t Deflect. Capacitor Defect. Replace Capacitor Fan.
4. Main Control Knob. No contacts at Position Main Control Knob defect. Replace Main Control Knob.
Shown.
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. O.L. 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 Knob. No contacts at Position Shown. Main Control Knob defect. Replace Main Control Knob.
Insufficient 1. Thermostat setting. Higher than ROOM TEMP. Set it lower.
cooling 2. Ventilation Door open. Open. Reduces capacity. Close Vent door.
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. ConsiderbuildinganAWNING.
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 Not Satisfied. Replace the Unit with
room too small. Bigger one.
7. Temp difference and REFER PERFORMANCE Leakage of refrigerant or Locate repair leak.
Running Current. EVALUATION. refrigeration system is Flush refrigeration cycle.
blocked.
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)
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. Removetheforeignmaterials.
Pieces blocking Drain (REFER OPERATING
Channel. INSTRUCTIONS)
Frozen 1. Thermostat Setting Set too low for ambient Outdoor TEMP. Low Set Main Control Knob 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 Flush refrigeration cycle.
blocked.

CW-C241SE
–8 –
Always turn off the air conditioner and main power supply before cleaning to ensure safety.
Caution
Wipe off dirt with a soft, dry cloth (use a vacuum cleaner to
removedust fromthe airIntake.)Useaclothandwaterless
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.
B
E
N
Z
E
N
E
T
H
I
NN
E
R
Annual check
* After long-term usage of room air conditioners, dust and dirt
will accumulate inside, lowering the performance. 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.
Vacuum cleaner
Front Grille
Cleanthefrontgrillewithacleanclothlightlydampenedwith
mild liquid dish-washing detergent.
CARE AND MAINTENANCE
Cabinet
Cleanthecabinetwithmildsoapordetergentand lukewarm
water.
lukewarm water +
mild detergent
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. Ifthefilterisverydirty,useamildhouseholddetergentin
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.

CW-C241SE
–9 –
EXPLODED VIEW
600
116
125
120
•The above exploded view is for the purpose of parts disassembly and replacement.
The non-numbered parts are not kept as standard service parts.
613
302
322
707
707
EXPLODED VIEW
211
210
220
128
111
212
108
118
122
121
300
106
702
103
710
102
610
207
114
101
117
703
129
113 205
112
110
711
130
100
500
505
200
202
201
507
501
502
123
712
124
303
312 308
329
147
306
508
311
509
310
304