Panasonic CW-C180EF-W, CW-C180EF-M, CW-SC180EF, CW-C240EF Service Manual

1 Product Specifications 2
2 Dimensions

3

3 Wiring Diagram

4

4 Refrigeration Cycle Diagram

6

5 Air Conditioner Performance Evaluation

6

6 Troubleshooting Guide

6

7 Operating Instructions

8

© 2000 Matsushita Industrial Corp. Sdn. Bhd.
(11969-T). All rights reserved. Unauthorized copying
and distribution is a violation of law.

CW-C180EF-W
CW-C240EF
CW-C180EF-M
CW-SC180EF

8 How to Install 10
9 Care and Maintenance

14

10 Service Information

15

11 Technical Data

16

12 Exploded View

17

13 Replacemen t Part List

18

Room Air Conditioner

CONTENTS

Page Page

Order No. MAC0011062C3

1 Product Specifications

Model CW-C180EF-W

CW-C180EF-M

CW-SC180EF

CW-C240EF

Phase Single Single
Voltage 220 - 240 V 220 - 240 V
Frequency 50 Hz 50 Hz
Capacity 5.34 - 5.40 kW

18,200 - 18,400 Btu/h

6.95 - 7.10 kW

23,700 - 24,200 Btu/h
Running Current 9.7 - 9.9 A 13.7 - 13.9 A
Input Power 2.02 - 2.12 kW 2.81 - 2.98 kW
EER 2.64 - 2.55 W/W 2.47 - 2.38 W/W
Starting Current 55 A 67 A
Noise Level Indoor (High / Low): 51 - 52 / 47 - 48 dB(A)

Outdoor (High / Low): 58 - 59 / 54 - 55 dB(A)

Indoor (High / Low): 57 - 58 / 54 - 55 dB(A)

Outdoor (High / Low): 63 - 64 / 60 - 61 dB(A)
Fan Motor Output 110 W 190 W
Compressor Output 1.7 kW 2.2 kW
Moisture Removal 2.9 Ltr/h

6.1 Pint/h

4.0 Ltr/h

8.5 Pint/h

Air Circulation 13.2 - 14.0 m3/min.

470 - 490 Ft

3

/min.

16.2 - 17.4 m3/min.
570 - 610 Ft

3

/min.

Dimensions Height: 16-7/8 inches (428 mm)

Width: 26 inches (660 mm)

Depth: 27-9/16 inches (700 mm)

Height: 16-7/8 inches (428 mm)

Width: 26 inches (660 mm)

Depth: 30-11/32 inches (770 mm)

Net Weight 67 kg

148 Ib

71 kg

157 Ib

Refrigerant (R-22) 910 g

32.1 oz

990 g

34.9 oz

Note: Specifications are subject to change without notice for further improvement.

2

2 Dimensions

Item CW-C180EF-W

CW-C180EF-M

CW-SC180EF

CW-C240EF

A - Width 26” (660)

B - Height 16-7/8” (428)

C - Depth 27-9/16” (700) 30-11/32” (770)

D 1-31/32” (50)
E 8-21/32” (220)
F 12-19/32” (320) 10-1/4” (260)
G 4-11/32” (110) 9-7/16” (240)
H 13-5/32” (334) 12-3/4” (324)

I 5-3/16” (132) 7-9/16” (192)

J 9-7/32” (234) 10” (254)

K 3-5/32” (80)

L 12-17/32” (318)
M 10-5/16” (262)
N 1-21/32” (42)
O 12-17/32” (318)
P 2-11/16” (68)
Q 9-7/16” (240) 12-7/32” (310)
R 7-15/32” (190)

Unit: Inch (mm)

2.1. Top View, Front View & Side View.

2.2. Unit.

3

CW-C180EF-W / CW-C240EF / CW-C180EF-M / CW-SC180EF

3 Wiring Diagram

3.1.1. Resistance of Fan Motor windings
and the rated Capacitor.

CW-C180EF-W

CW-C180EF-M

CW-SC180EF
Connection CWA951057
Blue - Yellow 60.7 Ω
Yellow - Brown 9.0 Ω
Brown - Orange 7.3 Ω
Red - Yellow 62.3 Ω
Capacitor CWA312048

(5µF, 440VAC)

3.1.2. Resistance of Compressor
windings and the rated Capacitor.

CW-C180EF-W
CW-C180EF-M

CW-SC180EF
Connection 2JS330D4AA02
C-R 0.981 Ω
C-S 2.845 Ω
Capacitor CWA31506

(45µF, 370VAC)

Note: Resistance at 20°C of Ambient Temperature.

3.1. CW-C180EF-W, CW-C180EF-M & CW-SC180EF.

4

3.2.1. Resistance of Fan Motor windings
and the rated Capacitor.

CW-C240EF
Connection CWA921039
Blue - Yellow 17.42 Ω
Yellow - Brown 2.34 Ω
Brown - Orange 2.85 Ω
Red - Yellow 21.7 Ω
Capacitor CWA312052

(8µF, 440VAC)

3.2.2. Resistance of Compressor
windings and the rated Capacitor.

CW-C240EF
Connection 2JS438D4CA02
C-R 0.820 Ω
C-S 2.247 Ω
Capacitor CWA31506

(45µF, 370VAC)

Note: Resistance at 20°C of Ambient Temperature.

3.2. CW-C240EF.

5

CW-C180EF-W / CW-C240EF / CW-C180EF-M / CW-SC180EF

CW-C180EF-W, CW-C180EF-

M & CW-SC180EF

CW-C240EF

Item Pressure

(MPa)

Temperature

(°C)

Pressure

(MPa)

Temperature

(°C)
A 2.09 ~ 2.19 64 ~ 83 2.23 ~ 2.30 72 ~ 88
B 1.94 ~ 2.04 38 ~ 48 2.01 ~ 2.16 35 ~ 45
C 0.54 ~ 0.63 8 ~ 12.5 0.52 ~ 0.56 6.5 ~ 10.5
D 0.48 ~ 0.54 5.5 ~ 13.5 0.50 ~ 0.54 4~12

Note: Indoor temperature at 27°C (DB), 19°C (WB) and Outdoor at
35°C (DB), 24°C (WB) for Cooling.

4 Refrigeration Cycle Diagram

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 and repair leak.

• Flush refrigeration cycle.

• Under 8°C (14.4°F) • Higher than specified by

50%.

• Compressor defect or
compressor capacitor defect.

• Replace the compressor or
compressor capacitor.

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.

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.

6