Panasonic CW-C70YE User manual

1 Product Specification 2
2 Dimensions 2
3 Wiring Diagram 3
4 Refrigeration Cycle Diagram 4
5 Air Conditioner Performance Evaluation 4
6 Troubleshooting Guide 4
7 Operating Instructions 6
© 2000 Matsushita Industrial Corp. Sdn. Bhd.
(11969-T). All rights reserved. Unauthorized copying
and distribution is a violation of law.
CW-C70YE
CW-C90YE
8 How to Install 8
9 Care and Maintenance 11
10 Service Information 12
11 Technical Data 13
12 Exploded View 14
13 Replacement Part List 15
Room Air Conditioner
CONTENTS
Page Page
Order No. MAC0007024C2

Model CW-C70YE CW-C90YE
Phase Single Single
Voltage 230 - 220 V 230 - 220 V
Frequency 50 Hz 50 Hz
Cooling Capacity 2.06 - 2.06 kW
7,000 - 7,000 Btu/h 2.65 - 2.64 kW 9,040 - 9,000 Btu/h
Running Current 3.0 - 3.1 A 4.0 - 4.1 A
Input Power 680 - 660 W 910 - 880 W
EER 3.03 - 3.12 W/W 2.91 - 3.00 W/W
Starting Current 12.4 A 18 A
Compressor Output 550 W 750 W
Fan Motor Output 40 W 40 W
Noise Level Indoor (High / Low):
46 / 43 - 45 / 41 dB(A)
Outdoor (High / Low):
56 / 51 - 55 / 50 dB(A)
Indoor (High / Low):
46 / 43 - 45 / 42 dB(A)
Outdoor (High / Low):
57 / 54 - 56 / 53 dB(A)
Power Level Indoor: 59 dB(A)
Outdoor: 68 dB(A) Indoor: 59 dB(A) Outdoor: 68 dB(A)
Item All listed models
A (Width) 17-23/32” (450 mm)
B (Height) 13-5/8” (346 mm)
C (Depth) 22-27/32” (580 mm)
D 21-1/4” (540 mm)
E5-21/32” (144 mm)
F6-1/32” (153 mm)
G1-31/32” (50 mm)
H3-27/32” (98 mm)
I1-3/16” (30 mm)
J3-27/32” (98 mm)
Model CW-C70YE CW-C90YE
Moisture Removal 1.3 Ltr/h
2.7 Pint/h 1.6 Ltr/h 3.4 Pint/h
Air Circulation 7.3 m3/min.
260 Ft3/min. 7.3 m3/min. 260 Ft3/min.
Dimensions Height: 13-5/8 inches
(346 mm)
Width: 17-23/32 inches
(450 mm)
Depth: 22-27/32 inches
(580 mm)
Height: 13-5/8 inches
(346 mm)
Width: 17-23/32 inches
(450 mm)
Depth: 22-27/32 inches
(580 mm)
Net Weight 31.5 kg
69 Ib 34.5 kg 76 Ib
Refrigerant (R-22) 520 g
18.4 oz 475 g 16.8 oz
Note: Specifications are subject to change without notice for further
improvement.
Item All listed models
K1-9/16” (40 mm)
L9-7/32” (234 mm)
M3-27/32” (98 mm)
N2-31/32” (75 mm)
O1-11/16” (43 mm)
P3-17/32” (90 mm)
Q0-29/32” (23 mm)
R 10-11/32” (263 mm)
1 Product Specification
2 Dimensions
2.1. Top View, Front View & Side View
2.2. Unit
2
CW-C70YE / CW-C90YE

3 Wiring Diagram
3.2. Resistance of Fan Motor
windings and the rated
Capacitor.
Model CW-C70YE CW-C90YE
Connection CWA921025 CWA92303
Blue - Yellow 96.9 Ω96.9 Ω
Yellow - Orange 38.4 Ω31.4 Ω
Red - Yellow 115.3 Ω115.3 Ω
Capacitor CWA31607
(2.3µF, 400VAC) CWA31607 (2.3µF, 400VAC)
3.3. Resistance of Compressor
windings and the rated
Capacitor.
Model CW-C70YE CW-C90YE
Connection 2RS122D5BB02 2PS156D5CA02
C-R 5.193 Ω3.501 Ω
C-S 5.557 Ω3.405 Ω
Capacitor CWA31501
(20µF, 370VAC) CWA31503 (30µF, 370VAC)
Note: Resistance at 20°C of Ambient Temperature.
3.1.
3
CW-C70YE / CW-C90YE

4.2. CW-C70YE
Item Pressure (MPa) Temperature (°C)
A 1.86 ~ 2.06 70 ~ 85
B 1.81 ~ 2.01 31 ~ 41
C 0.59 ~ 0.66 8~14
D 0.54 ~ 0.59 13 ~ 21
Note: Indoor temperature at 27°C (DB), 19°C (WB) and Outdoor at
35°C (DB), 24°C (WB).
4.3. CW-C90YE
Item Pressure (MPa) Temperature (°C)
A 1.96 ~ 2.22 71 ~ 89
B 1.91 ~ 2.06 35 ~ 45
C 0.56 ~ 0.63 7~12
D 0.50 ~ 0.56 6~14
Note: Indoor temperature at 27°C (DB), 19°C (WB) and Outdoor at
35°C (DB), 24°C (WB).
4 Refrigeration Cycle Diagram
4.1.
5 Air Conditioner Performance Evaluation
Intake & Discharge Air
Temperature Difference Current Drain Determination Remedy
• 8°C and over (14.4°F) • As specified. • Nothing wrong. • None.
• 8°C and over (14.4°F) • Higher than specified. • Nothing wrong, outdoor
temperature is too high, heat
radiation is not efficient.
• Improve heat radiation.
• Under 8°C (14.4°F) • Higher than specified. • Something is preventing heat
radiation. • Excessive amount of refrigerant.
• Improve heat radiation.
• Under 8°C (14.4°F) • Lower than specified. • Leakage of refrigerant or
refrigerant system is blocked. • Locate repair leak.
• Flush refrigeration cycle.
• Under 8°C (14.4°F) • Higher than specified by
50%. • Compressor defect. • Replace the compressor.
Note: Room air humidity is relatively higher, the temperature difference will be smaller.
6 Troubleshooting Guide
Warning: Disconnect unit from electrical power supply before making any electrical checks.
Trouble Check Result Cause Remedy
Fan Motor and Compressor
won’t run. • Supply Voltage
• Fuse Box or Circuit
Breaker.
• Power cord or
Wiring Harness.
• Thermostat Setting.
• Less than 10% by
Rated.
• Open Contacts.
• Pulled loose or
Shorted.
• Higher than room
temp.
• Temporary or Permanent?
• Customer Restarted unit
immediately without waiting
3 minutes.
• Consult ELECTRICIAN, If
permanent.
• Repair Open Circuit.
• WAIT FOR 3 MINUTES.
• Repair or Replace it.
• Set it LOWER.
4
CW-C70YE / CW-C90YE

Trouble Check Result Cause Remedy
Fan Motor won’t run
(Compressor run). • Objects around
Fan.
• RESISTANCE
between Wires.
• Capacitor Fan
Motor.
• Main Control
Switch.
• Locked Fan.
• Shorted / Open
circuit.
• OHM Meter doesn’t
Deflect.
• No contacts at
Position Shown.
• Fan Hitting Cowling or
• Foreign Materials.
• Frozen Bearings.
• Shorted or Burned out.
• Capacitor Defect.
• Main Control Switch defect.
• Adjust Fan position setting
screw.
• Remove Foreign Materials.
• Replace Fan Motor.
• Replace Fan Motor.
• Replace Capacitor Fan.
• Replace Main Control
Switch.
Compressor won’t run (Fan
run). • Thermostat setting.
• RESISTANCE
between Terminal
and the
Compressor Body.
• RESISTANCE
between Terminals.
• Overload Protector.
• Capacitor
Compressor.
• Thermostat.
• Main Control
Switch.
• Higher than room
temp.
• Shorted.
• Shorted.
• Infinity between
Terminals.
• OHM Meter doesn’t
deflect.
• No click heard.
• No contacts at
Position Shown.
• Winding Coil touched to
the compressor shell.
• Rear Shorted or Burnt out.
• Overload Protector defect.
• Capacitor defect.
• Thermostat defect.
• Main Control Switch defect.
• Set it lower.
• Replace Compressor.
• Replace Compressor.
• Replace Overload
Protector.
• Replace Capacitor
Compressor.
• Replace Thermostat.
• Replace Main Control
Switch.
Air Swing won’t run. • Main Control
Switch.
• Air Swing Switch.
• Resistance
between wires.
• High or Low Fan
setting.
• OFF position.
• No contact at
position.
• OHM Meter doesn’t
deflect.
• Open circuit.
• Shorted or open circuit.
• Set it High or Low Cool.
• Set it ON.
• Replace Air Swing Switch.
• Replace Air Swing Motor.
Insufficient cooling. • Thermostat Setting.
• Ventilation door
open.
• Air filter dirty.
• Location of
installation.
• Evaporator /
Condenser Coil
obstructed.
• Unit capacity for
the room too small.
• Temp difference
and running
current.
• Higher than room
temp.
• Open.
• Clogged or dirty.
• Sunlight hitting
outdoor side.
• Obstacles.
• Clogged or dirty.
• Not satisfied.
• REFER TO
PERFORMANCE
EVALUATION.
• Reduces capacity.
• Restricted air circulation.
• Restricted Heat Exchanger.
• Restricted Heat Exchanger.
• Restricted air circulation.
• Leakage of refrigerant or
refrigeration system is
blocked.
• Set it lower.
• Close Vent. door.
• Clean or replace Air Filter.
• Consider building an
AWNING.
• Remove obstacles or
reinstall unit.
• Clean the coils.
• Replace the unit with
bigger one.
• Locate repair leak.
• Flush refrigeration cycle.
Noise. • Source of Noise • Vibration.
• Intermittent Noise.
• Faulty installation.
• Fan hitting objects.
• Refrigerant tubing touching
each other.
• Fan splashing Drain Water.
• Reinstall unit or Reinforce
the installation.
• Adjust Fan position or
remove foreign materials.
• About 1/2” Clearance
needed.
• Normal occurrence.
Water dripping inside room. • Unit installation.
• Drain Tray-
Styrofoam pieces
blocking drain
channel.
• Tilted to inside room.
• Clogged.
• Restricted run off.
• Clogged or blocked.
• Tilt unit to outside slightly.
• Remove the foreign
materials.
Frozen Evaporator • Thermostat setting.
• Air filter /
Evaporator.
• Temp. difference
and running
current.
• Set too low for
ambient conditions.
• Clogged or Dirty.
• REFER TO
PERFORMANCE
EVALUATION.
• Outdoor temp. low (Night
time).
• Restricted air circulation.
• Leakage of refrigerant or
refrigeration system is
blocked.
• Set the Main Control Knob
to Fan to melt ice and set
the Temp. Control to
higher temperature.
• Clean Air filter /
Evaporator.
• Locate and repair leak.
• Flush refrigeration cycle.
5
CW-C70YE / CW-C90YE

7.1. Parts Identification.
7.1.1. Vertical Airflow Direction Vane.
Airflow direction adjustment Up-and-Down.
• The vertical airflow direction vane may
be positioned to deflect the air upward,
downward or straight on.
7.1.2. Ventilation Lever.
When the slide lever is in the:
• “OPEN” position, the ventilation door
opens to allow air, smoke and odors to
be expelled from the room.
• “CLOSE” position, the ventilation door is
closed and the air inside the room is
circulated and conditioned.
7.1.3. Operating Conditions.
Use the air conditioner under the following conditions:
• Operating temperature range.
Indoor side Indoor side Outdoor side Outdoor side
D.B.T. W.B.T. D.B.T. W.B.T.
Maximum
Temperature 32°C 23°C 43°C 26°C
Minimum
Temperature 21°C 15°C 21°C 15°C
D.B.T.: Dry Bulb Temperature
W.B.T.: Wet Bulb Temperature
Note: Humidity may exceed 90%.
− Continuous operation at over 90% high humidity may
create condensation and result in water drops on the
intake and outlet vanes.
7 Operating Instructions
6
CW-C70YE / CW-C90YE

7.2. How to Operate.
(1) Open the Control Panel Cover.
Fig. 1
(2) Power Supply
Switch off the breaker and set the Main Control Knob to the
OFF position before plugging the power plug into an
electrical outlet.
Fig. 2
(3) Main Control Knob
Set the Main Control Knob to either LOW COOL or HIGH
COOL as desired, 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 it to a
cooling operation.
Fig. 3
(4) Thermostat Control Knob
Turn the Thermostat Control Knob as shown in Fig. 4.
Usually “6” ~ “7” is the recommended setting position.
Note: When the Thermostat Control Knob is set to “10”,
moisture may freeze onto the evaporator fins and prevent
effective cooling. If this happens, turn the Main Control
Knob to HIGH FAN, and the Thermostat Control Knob
counterclockwise. This will quickly defrost the evaporator
fins so that normal cooling can be resumed.
Fig.4
(5) Air Swing Switch
(Airflow direction adjustment side-to-side)
To obtain a fixed airflow direction, set the Air Swing Switch
to “ON” for the vanes to swing from side to side until the
desired flow direction is reached, then switch it to “OFF”.
For continuous side-to-side air circulation, set the Air Swing
Switch to “ON”.
Fig. 5
7
CW-C70YE / CW-C90YE

8.1.1. Electrical Work.
• Always use at the rated voltage and with a specific air
conditioning circuit.
• Power supply point shall be the place where there is ease
for the power disconnection in case of emergency.
• Some installation locations may require installation of a
short-circuit breaker.
• A 16 Ampere time delay fuse or circuit breaker is required.
• Nominal cross sectional area of power supply wire must be
3 core x 1.0 mm2 or above.
• The power supply must be from an independent circuit.
• All electrical installation must be made in accordance with
local wiring and safety regulations wherever applicable.
• There must be a double pole switch with minimum of 3mm
contact gap in the fixed installation circuit (Applicable for
models without power supply plug only).
8.1.2. Select the Best Location.
• Install the unit at the nearest power outlet.
• The air conditioner should be installed in a dry place where
there are no draughts.
• Condensation from the air conditioner must be drained into
an appropriate location.
• Do not install in a location where flammable gas leaks is a
possibility.
• Usage in locations where the air is salty such as coastal
areas or near hot spas, or where sulphurous gas is
generated, may lead to a malfunction.
• Do not install this appliance in a laundry room or other
locations where water may drip from the ceiling, etc.
• Select an installation location which is rigid and strong
enough to support or hold the unit and select a location for
easy maintenance.
8 How to Install
8.1. Before installing air conditioner, please read the following:
8.2. Preparation for Installation.
• There should not be any obstacles surrounding the unit.
• Prepare an installation hole that is only slightly bigger than the cabinet size.
8
CW-C70YE / CW-C90YE

8.3.1. Remove the Front Intake Grille.
1.Push on the indication. Front Intake Grille will be
automatically released.
2.Pull up the Front Intake Grille to about 90°. Slide it slightly
to the left to unhook the tabs.
8.3.2. Remove the Air Filter.
• Tilt up and pull out the air filter by the holder.
8.3.3. Remove the Front Grille.
1.Remove the adhesive tapes from all sides of the Front
Grille.
2.Open the Control Panel cover.
3.At the bottom right side of the Front Grille, press inward on
the Cabinet near the Power Cord and pull the grille outward
to the right until the right tab releases.
4.At the bottom left side, push inward on the Cabinet and pull
the grille outward to the left to release the left tab. Do not
pull the bottom edge toward you more than 3 inches as to
prevent top two tabs from damage.
5.Slide the Front Grille upward to free the two top tabs from
slots at the top of the Cabinet.
8.3.4. Remove the Chassis Locking
Brackets from the Cabinet.
• Unscrew and remove both Chassis Locking Brackets. Keep
them for reinstallation.
8.3.5. Slide the Chassis out from the
Cabinet.
8.3. Installation Procedure.
9
CW-C70YE / CW-C90YE

8.3.6. Place Cabinet into the installation
hole, then secure it by wood
screws or nails.
• Note: Tilt down for better drainage (max. 10mm).
8.3.7. Slide the Chassis back into the
Cabinet.
8.3.8. Lock the Chassis back to the
Cabinet by using back the Chassis
Locking Brackets.
8.3.9. Reattach the Front Grille to the
Cabinet and secure it with screws.
• Note: Depending upon the location of the AC outlet, route
the AC cord to either the left or right side while installing the
Front Grille.
8.3.10. Insert the Air Filter.
8.3.11. Reattach the Front Intake Grille.
• Slide the Front Intake Grille slightly to the right to reattach
the tabs and then push down to close tight.
Note: A”Click” sound can be heard when the Front Intake
Grille is pushed down.
10
CW-C70YE / CW-C90YE

This air conditioner employs a “Slinger-Up System” which is
designed to splash the condensed water on the condenser coil
for maximum cooling efficiency, thus producing a splashing
sound. If the splashing sound annoys you, you can provide an
outside drainage 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 Base Pan.
3.Install the Drain Pan at the right corner of the Cabinet with
2 screws.
4.Connect the drain hose to the outlet of Drain Pan bottom.
5.Slide the Chassis back into the Cabinet.
Note: Drain hose or tubing can be purchased locally to satisfy
your particular needs.
9.1. Cleaning the Unit.
Clean the Cabinet, Front Grille with a mild soap or detergent
and lukewarm water.
9.2. Cleaning the Front Intake
Grille.
Gently wash with water and a sponge. (Do not use a scrubbing
brush or other hard cleaning aids).
9.3. Cleaning the Air Filter.
1.Push and release the bottom of the Front Intake Grille.
2.Lift up the Front Intake Grille at 45° until it is supported by
the stopper.
3.Tilt up and pull out the Air Filter by the holder.
4.Vacuum the front of the filter and then wash the back of it
with water. If it is badly soiled, wash with a mild household
detergent.
8.4. Condensed Water Drainage.
9 Care and Maintenance
Caution: Always turn off the air conditioner and the main power supply before unplugging the power cord to clean the
unit.
Note: Do not clean with benzene, thinner, scouring powder or corrosive chemicals. Do not dry the Front Intake Grille or
the Air Filter in direct sunlight. Exposure to direct sunlight may discolor or deform the panel.
11
CW-C70YE / CW-C90YE

1.Remove the Front Intake Grille (refer to page 9).
2.Remove the Air Filter (refer to page 9).
3.Remove the Front Grille (refer to page 9).
4.Remove the 2 knobs.
5.Take off the Control Panel.
6.Release the sensor thermostat from the holder sensor.
7.Loosen the 2 screws of the Control Board.
8.Slide the Control Board out from the chassis.
• Control Board part location.
10 Service Information
10.1. Removal of the Control Board
12
CW-C70YE / CW-C90YE

11.1.1. CW-C70YE
• Cooling Characteristics Vs. Outdoor Temperature.
• Mechanical Thermostat.
11.1.2. CW-C90YE
• Cooling Characteristics Vs. Outdoor Temperature.
11 Technical Data
11.1. Operation Characteristics.
11.2. Thermostat Characteristics.
13
CW-C70YE / CW-C90YE

12 Exploded View
(Note)
• The above exploded view is for the purpose of parts disassembly and replacement.
• The non-numbered parts are not kept as standard service parts.
14
CW-C70YE / CW-C90YE

13 Replacement Part List
Ref. No. Part Name & Description Qty CW-C70YE CW-C90YE
100 Base Pan Complete 1CWD52K288A <----
101 Bulkhead Complete 1CWD53C1001 <----
102 Air Guide - Propeller Fan 1CWD31146 <----
103 Bracket - Fan Motor 1CWD54186 <----
106 Top Plate 1CWD64C1001 <----
109 Drain Tray - Evaporator 1CWH40215 <----
112 Holder - Ventilation Lever 1CWD91055 <----
113 Ventilation Lever 1CWH22031 <----
117 Vane - Air Swing 1CWE24330 <----
120 Blower Wheel Complete 1CWH01K069 <----
121 Propeller Fan 1CWH00052 <----
122 Nut - Propeller Fan 1CWH56032 <----
123 Holder - Air Swing Motor 1CWD911015 <----
124 Holder - Capacitor (Compressor) 1CWH30133 <----
125 Control Board (Main) 1CWH10986 <----
128 Holder - Sensor 1CWH32085 <----
129 Drain Plug - Base Pan 1CWH4611062 <----
130 Chassis Locking Bracket (Left) 1CWD932018 <----
130-A Chassis Locking Bracket (Right) 1CWD932019 <----
135 Air Guide - Blower Wheel 1CWD32169A <----
144 Air Guide - Blower Wheel (Front) 1CWD32170 <----
145 Supporter - Air Swing 1CWD931053 <----
200 Compressor 12RS122D5BB02 2PS156D5CA02
201 Bushing - Compressor Mount 3CWH50072 <----
202 Nut - Compressor Mount 3CWH4582065 CWH56000
203 Gasket - Terminal Cover 1CWH7070603 <----
204 Spring Holder - Overload Protector 1CWH7041200 <----
205 Terminal Cover - Compressor 1CWH7070205U <----
206 Gasket - Nut (Washer) 1CWH7070601 <----
207 Nut - Terminal Cover 1CWH7080300 <----
210 Condenser 1CWB32C1037 CWB32C1004
211 Strainer 1CWB11025 <----
212 Capillary Tube 1CWB15K1003 CWB15K1001
220 Evaporator 1CWB30C1017 <----
300 Fan Motor 1CWA921025 CWA92303
301 Overload Protector - Compressor 1CWA12343 CWA121020
302 Capacitor - Fan Motor 1CWA31607
(2.3µF, 400VAC) <----
303 Capacitor - Compressor 1CWA31501
(20µF, 370VAC) CWA31503 (30µF, 370VAC)
304 Main Control Switch 1CWA07054 <----
306 Switch - Air Swing 1CWA05024 <----
308 Thermostat 1CWA151001 <----
310 Terminal Board 1CWA4711012 <----
311 Power Supply Cord 1CWA20C2087 <----
312 Air Swing Motor 1CWA98266 <----
313 Fuse 1 XBA2C31TR0 <----
314 Fuse Holder 1XCSCW011 <----
500 Front Grille Complete 1CWE11C2027 <----
501 Air Filter 1CWD00251 <----
502 Grille Door 1CWE14249 <----
503 Intake Grille 1CWE221007 <----
504 Catcher 1CWH60060 <----
505 Vane 12 CWE241002 <----
507 Link - Vanes 1CWE26200 <----
508 Control Panel 1CWE311200 <----
509 Knob Complete - Turning 2CWE17C076 <----
600 Cabinet Complete 1CWE00C1006A <----
610 Drain Pan 1CWH40175 <----
702 Screw - Bracket Fan Motor 4CWH55101 <----
703 Screw - Blower Wheel 1CWH4580326 <----
707 Screw - Front Grille Mount 1CWH82C1027 <----
710 Screw - Drain Pan 1CWG86C733 <----
711 Screw - Chassis Locking Bracket 3XTN4+8C <----
712 Screw - Unit Installation 1CWG86C280 <----
715 Operating Instructions 1CWF563152 <----
716 Installation Instructions 1CWF612117 <----
• The above parts are kept for seven years in accordance with MEI service policy.
• However, longer lead time will be required for the supply of non-numbered parts.
• All parts are supplied by MAICO, Malaysia (Vendor Code: 061).
15
CW-C70YE / CW-C90YE

16
CW-C70YE / CW-C90YE
[MAICO] Printed in Malaysia
TSD001200500YW