Panasonic CS-A73KE, CS-A93KE, CU-A73KE, CU-A123KE, CU-A93KE Service Manual

ORDER NO. MAC9902015C2

Service Manual

Room Air Conditioners

CS-A73KE / CU-A73KE
CS-A93KE / CU-A93KE

CS-A123KE / CU-A123KE

Contents

● Features ..........................................................1

● Functions ...................................................2 – 4

● Product Specifications .............................5 – 10

● Dimensions ............................................11 – 12

● Refrigeration Cycle Diagram .........................13

● Block Diagram ...............................................14

● Wiring Diagram .............................................. 15

● Operation Details ...................................16 – 30

● Installation Information ..........................31 – 32

● 2-way, 3-way Valves..............................33 – 39

● Servicing Information .............................40 – 42

● Troubleshooting Guide ..........................43 – 44

● Technical Data.......................................45 – 48

● Exploded View ...................................49, 51, 53

● Replacement Parts List .....................50, 52, 54

● Electronic Parts List ....................................... 55

 1999 Matsushita Air-Conditioning Corp. Sdn. Bhd.
(183914D)
All rights reserved. Unauthorized copying and distribu­tion is a violation of law.

CS-A73KE

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.

!!

Features

• High Efficiency

• Compact Design

• Comfort Enviroment

– 8 hours of sleep mode operation
– Air purifying filter with deodorizing function

to reduce dust, smoke and odours.

• Random Auto Restart

– Auto restart at randomly after power failure

• Removable and Washable
Front Panel

• Quality Improvement

– Gas leakage protection
– Prevent compressor reverse rotation
– 2-stage OLP to protect compressor

• Service Improvement

– Easy fan motor replacement procedure

• Operation Improvement

– Economy mode to reduce electrical power

consumption.

– Powerful mode to reaches the desired room

temperature quickly.

• Long Installation Piping

– CS/CU–A73KE, CS/CU–A93KE, long piping up to 10

meter.

– CS/CU–A123KE, long piping up to 15 meter.

– 1 –

Functions

Remote Control

CS-A73KE

OFF / ON I

MODE

FAN SPEED

AIR SWING

Operation OFF / ON

Operation Mode Selection

• AUTO Automatic Operation Mode

• HEAT Heating Operation Mode

• COOL Cooling Operation Mode

• DRY Soft Dry Operation Mode

Indoor Fan Speed Selection

• h j k Low Speed

l

• h j k Medium Speed

lll

• h j k High Speed

lllll

• AUTO FAN Automatic Fan Speed

Airflow Direction Control

• AUTO Automatic Airflow Direction
Control

• MANUAL Airflow Direction Manual Control

TEMP.

ON-TIMER
OFF-TIMER

TIMER

SET
CANCEL

CLOCK

Room Temperature Setting

• Temperature Setting (16°C to 30°C)

• Automatic Operation

8 HI

a

a
a

9 Lo

Operation with 2°C higher than
standard temperature.

Operation with standard
temperature.

Operation with 2°C lower than
standard temperature.

Timer Operation Selection

• 24-hour, OFF / ON Real Timer Setting.

Time / Timer Setting

• Hours and minutes setting.

Timer Operation Set / Cancel

• ON Timer and OFF Timer setting and
cancellation.

Clock Setting

• Current time setting.

POWERFUL

ECONOMY

Powerful Mode Operation OFF/ON

Economy Mode Operation OFF/ON

– 2 –

SLEEP

Sleep Mode Operation OFF / ON

CS-A73KE

Functions

Indoor Unit

POWER I

AUTO

OFF / ON

TEST RUN

OFF / ON

Power Switch OFF / ON

Auto Operation Button

• Used when the remote control cannot be
used.

Remote Control Signal Receiving
Sound

• It can be controlled by pressing Auto
Operation Button for 10 seconds.

Operation Test Running / Pump
Down Switch

• Used when test running or servicing.

Operation Indication Lamps (LED)

• POWER (Red)...... Lights up in operation,

blinks in Automatic
Operation Mode judging

• SLEEP (Orange)..... Lights up in Sleep

Mode Operation

• TIMER (Orange)..... Lights up in Timer

Setting

• POWERFUL

• ECONOMY

(Orange).....

(Green).....

Lights up in Powerful
Mode Operation
Lights up in Economy
Mode Operation

Operation Mode

• Heating, Cooling, Soft Dry and
Automatic Mode.

Random Auto Restart Control

• Operation is restarted randomly after power
failure at previous setting mode.

Anti-Freezing Control

• Anti-Freezing control for indoor heat
exchanger. (Cooling and Soft Dry)

Sleep Mode Auto Control

• Indoor Fan operates at low speed.

• Operation stops after 8 hours.

Indoor Fan Speed Control

• High, Medium and Low.

• Automatic Fan Speed Mode

– Heating : Fan speed varies from Me →

SLo in accordance with indoor
heat exchanger.

– Cooling : Fan rotates at Hi and Me

speed. Deodorizing control is
available.

– Soft Dry : Fan rotates at SLo speed.

Deodorizing control is avail­able.

Airflow Direction Control

• Automatic air swing and manual adjusted
by remote control for vertical airflow.

• Manually adjusted by hand for horizontal
airflow.

Starting Current Control
Time Delay Safety Control

• Restarting is inhibited for appro. 3 minutes.

Powerful Operation

• Reaches the desired room temperature
quickly.

Economy Operation

• To reduce electrical power consumption.

– 3 –

7 Minutes Time Save Control

• Cooling Operation only.

Hot-Start Control

• The indoor fan remain stop until the indoor
heat exchanger temperature reaches 30°C

• The indoor fan will operate at SLo and Lo
when indoor heat exchanger temperature
reaches 30°C - 39°C

–

Functions

Outdoor Unit

CS-A73KE

CU-A73KE, CU-A93KE

Compressor Reverse Rotation
Protection Control

• To protect compressor from reverse
rotation when there is a instantaneous
power failure.

Overload Protector

• 2-Stage OLP to protect the compressor.
Overload Protector will trip when
– Temperature of compressor increases to

120°C.

– High temperature or high current flows to

compressor.
(Refer circuit diagram for OLP
characteristic)

60 Secs. Forced Operation Control

• Once the compressor is activated, it does
not stop within the first 60 secs. However, it
stops immediately with remote control stop
signal.

Outdoor Fan Operation Control

•

Inner protector.

CU-A123KE

Deice Control

• To prevent frosting at outdoor heat
exchanger. (Only for Heating Operation)

•

Temperature of outdoor heat exchanger is
sensed by TRS (Thermal Reed Switch).

Overload Protection Control

• Outdoor fan stops when indoor heat
exchanger temperature rises to 51°C and
above, and restarts when the indoor heat
exchanger temperature drops to 49°C and
below.

• Compressor stop when indoor heat ex­changer temperature reaches 65°C or
above. (Heating Operation Only)

Compressor Protection Control

• If the outdoor fan motor is not running after
compressor starts for 50 secs., compressor
will stop. (Cooling and Soft Dry Operation
only).

4-Way Valve Control

• When the unit is switched to "OFF" during
Heating Operation, 4-way valve stays at
Heating position for 5 minutes.

Outdoor Fan Motor Control

– 4 –

CS-A73KE

Product Specifications

Cooling Capacity

Heating Capacity

Moisture Removal

Power Source

Airflow Method

Air Volume

Noise Level
Electrical

Data

Piping Connection Port
(Flare piping)
Pipe Size
(Flare piping)
Drain
Hose

Power Cord Length

Dimensions

Net Weight
Compressor

Air Circulation

Indoor Air (Lo)
Indoor Air (Me)
Indoor Air (Hi)
Outdoor Air

Input
Running Current
COP

Starting Current

Inner diameter
Length

Number of core-wire

Motor Type
Rated Output

Motor Type

Fan Low
Speed Medium

Height
Width

Depth

Type

Type
Material

Input
Rated Output

High

Unit

kW

Btu/h

kW

Btu/h

s/h

Pint/h

Phase

V

Cycle

OUTLET

INTAKE

3

m

/min (cfm)

3

/min (cfm)

m
m3/min (cfm)
m3/min (cfm)

dB (A)

W

A

W/W

A
inch
inch
inch
inch
mm

m
m

inch (mm)
inch (mm)
inch (mm)

lb (kg)

W

W

W
rpm
rpm
rpm

CS-A73KE

2.20 - 2.10

7,500 - 7,200

2.45 - 2.40

8,360 - 8,200

1.4

3.0

Single

230 - 220

50

SIDE VIEW

Cooling ; 5.9 (206) - 5.7 (200)

Heating ; 6.7 (238) - 6.6 (233)
Cooling ; 6.7 (237) - 6.4 (227)
Heating ; 7.6 (269) - 7.5 (265)
Cooling ; 7.5 (260) - 7.2 (250)
Heating ; 8.5 (300) - 8.4 (300)

–

Cooling ; High 34/33, Low 29/27

Heating ; High 36/35, Low 30/28

Cooling ; 700 - 680
Heating ; 640 - 600

Cooling ; 3.6 - 3.5
Heating ; 3.4 - 3.2

Cooling ; 3.14 - 3.09
Heating ; 3.83 - 4.00

15.5
G ; Half Union 3/8"
L ; Half Union 1/4"
G (gas side) ; 3/8"
L (liquid side) ; 1/4"

12

0.7

2.0

2

3 (1.0 mm
10-31/32 (279)
31-15/32 (799)

7-15/32 (190)

20 (9.0)

Cross-flow Fan

AS + Glass Fiber 30%

Induction (4-pole)

29.0 - 27.0

835 - 810
945 - 920

1055 - 1030

)

–
–

–

10

CU-A73KE

TOP VIEW

–

–

–

27.8 (981) - 26.8 (946)
Cooling ; High 47/45

Heating ; High 49/47

G ; 3-way valve 3/8"

L ; 2-way valve 1/4"

G (gas side) ; 3/8"

L (liquid side) ; 1/4"

–
–
–

–
18-29/32 (480)
30-23/32 (780)

9-21/32 (245)

64 (29.0)

Rotary (1 cylinder)

rolling piston type
Induction (2-pole)

600

Propeller Fan

AES + Glass Fiber 12%

Induction (6-pole)

65.8 - 57.5
20

–
–

730 - 705

– 5 –

Product Specifications

CS-A73KE

Unit
Heat
Exchanger

Refrigerant Control Device
Refrigeration Oil

Refrigerant (R-22)
Thermostat
Protection Device

Capillary Tube

Air Filter
Capacity Control

Compressor Capacitor
Fan Motor Capacitor

• Specifications are subject to change without notice for further improvement.

Description
Tube material

Fin material
Fin Type
Row / Stage

FPI
Size (W × H × L)

Length
Flow Rate
Inner Diameter
Material
Style

mm

(c.c)

g (oz)

mm

s/min

mm

µF, VAC
µF, VAC

CS-A73KE

Evaporator

Copper

Aluminium

Slit Fin

(Plate fin configuration, forced draft)

2 × 14

18

614 × 294 × 25.4

–
–
–

Electronic Control

–
–
–
–

P.P.

Honeycomb

Capillary Tube

–

1.5 µF, 400VAC

Cooling ;850, Heating ;360
Cooling ;4.5, Heating ;10.5
Cooling ;1.1, Heating ;1.3

CU-A73KE
Condenser

Copper
Aluminium
Louver Fin

1 × 18

19

856 × 457.2 × 22

Capillary Tube

SUNISO 4GDID or

ATMOS M60 (290)

815 (28.8)

–

Overload Protector

–

15 µF, 440VAC

1.2 µF, 400VAC

– 6 –

CS-A73KE

Product Specifications

Cooling Capacity

Heating Capacity

Moisture Removal

Power Source

Airflow Method

Air Volume

Noise Level
Electrical

Data

Piping Connection Port
(Flare piping)
Pipe Size
(Flare piping)
Drain
Hose
Power Cord Length

Dimensions

Net Weight
Compressor

Air Circulation

Indoor Air (Lo)
Indoor Air (Me)
Indoor Air (Hi)
Outdoor Air

Input
Running Current
COP

Starting Current

Inner diameter
Length

Number of core-wire

Motor Type
Rated Output

Motor Type

Fan Low
Speed Medium

Height
Width
Depth

Type

Type
Material

Input
Rated Output

High

Unit

kW

Btu/h

kW

Btu/h

s/h

Pint/h

Phase

V

Cycle

OUTLET

INTAKE

3

/min (cfm)

m

3

m

/min (cfm)

3

m

/min (cfm)

m3/min (cfm)

dB (A)

W

A

W/W

A
inch
inch
inch
inch

mm

m
m

inch (mm)
inch (mm)
inch (mm)

lb (kg)

W

W

W
rpm
rpm
rpm

CS-A93KE

2.80 - 2.70

9,550 - 9,200

3.40 - 3.30

11,590 - 11,250

1.6

3.4

Single

230 - 220

50

SIDE VIEW

Cooling ; 6.4 (226) - 5.9 (209)
Heating ; 6.8 (240) - 6.5 (228)
Cooling ; 7.6 (269) - 7.1 (251)
Heating ; 8.1 (286) - 7.7 (273)

Cooling ; 9.2 (320) - 8.9 (310)
Heating ; 9.8 (350) - 9.7 (340)

–

Cooling ; High 39/38, Low 29/28
Heating ; High 39/39, Low 30/28

Cooling ; 980 - 950
Heating ; 885 - 870

Cooling ; 4.6 - 4.6

Heating ; 4.2 - 4.2
Cooling ; 2.86 - 2.84
Heating ; 3.84 - 3.79

22
G ; Half Union 3/8"
L ; Half Union 1/4"
G (gas side) ; 3/8"
L (liquid side) ; 1/4"

12

0.7

2.0

14

2

)

–
–

–

3 (1.0 mm
10-31/32 (279)
31-15/32 (799)

7-15/32 (190)

20 (9.0)

Cross-flow Fan

AS + Glass Fiber 30%

Induction (4-pole)

37.0 - 34.0

865 -810

1030 -970

1245 - 1215

CU-A93KE

TOP VIEW

–

–

–

27.8 (981) - 26.8 (946)
Cooling ; High 49/48

Heating ; High 49/47

G ; 3-way valve 3/8"

L ; 2-way valve 1/4"

G (gas side) ; 3/8"

L (liquid side) ; 1/4"

–
–
–

–
18-29/32 (480)
30-23/32 (780)

9-21/32 (245)

71 (32.0)

Rotary (1 cylinder)

rolling piston type
Induction (2-pole)

800

Propeller Fan

AES + Glass Fiber 12%

Induction (6-pole)

65.8 - 57.5
20

–
–

730 - 705

– 7 –

Product Specifications

CS-A73KE

Unit

Heat
Exchanger

Refrigerant Control Device
Refrigeration Oil

Refrigeration (R-22)
Thermostat
Protection Device

Capillary Tube

Air Filter
Capacity Control

Compressor Capacitor
Fan Motor Capacitor

• Specifications are subject to change without notice for further improvement.

Description
Tube material
Fin material
Fin Type
Row / Stage

FPI
Size (W × H × L)

Length
Flow Rate
Inner Diameter
Material
Style

mm

(c.c)

g (oz)

mm

s/min

mm

µF, VAC

µF, VAC

CS-A93KE
Evaporator

Copper

Aluminium

Slit Fin

(Plate fin configuration, forced draft)

2 × 14

18

614 × 294 × 25.4

–
–

–

Electronic Control

–
–
–
–

P.P.

Honeycomb

Capillary Tube

–

1.5 µF, 400VAC

Cooling ; 1,075, Heating ; 325
Cooling ; 5.0, Heating ; 13.4

Cooling ; 1.2, Heating ; 1.4

CU-A93KE
Condenser

Copper
Aluminium
Louver Fin

1 × 18

19

856 × 457.2 × 22

Capillary Tube
SUNISO 4GDID or
ATMOS M60 (350)

935 (33.0)

–

Overload Protector

–
–

25 µF, 370VAC

1.2 µF, 400VAC

– 8 –

CS-A73KE

Product Specifications

Cooling Capacity

Heating Capacity

Moisture Removal

Power Source

Airflow Method

Air Volume

Noise Level
Electrical

Data

Piping Connection Port
(Flare piping)
Pipe Size
(Flare piping)
Drain
Hose

Power Cord Length

Dimensions

Net Weight
Compressor

Air Circulation

Indoor Air (Lo)
Indoor Air (Me)
Indoor Air (Hi)
Outdoor Air

Input
Running Current
COP

Starting Current

Inner diameter
Length

Number of core-wire

Motor Type
Rated Output

Motor Type

Fan Low
Speed Medium

Height
Width
Depth

Type

Type
Material

Input
Rated Output

High

Unit

kW

Btu/h

kW

Btu/h

s/h

Pint/h

Phase

V

Cycle

OUTLET

INTAKE

3

/min (cfm)

m

3

/min (cfm)

m
m3/min (cfm)
m3/min (cfm)

dB (A)

kW

A

W/W

A
inch
inch
inch
inch

mm

m
m

inch (mm)
inch (mm)
inch (mm)

lb (kg)

W

W

W
rpm
rpm
rpm

CS-A123KE

3.55 - 3.40

12,110 - 11,590

4.20 - 4.05

14,320 - 13,810

2.1

4.4

Single

230 - 220

50

SIDE VIEW

Cooling ; 7.5 (263) - 7.0 (247)

Heating ; 8.0 (281) -7.5 (266)
Cooling ; 8.1 (284) - 7.7 (271)
Heating ; 8.6 (303) - 8.3 (293)

Cooling ; 9.0 (320) - 8.8 (310)
Heating ; 9.6 (340) - 9.5 (340)

–

Cooling ; High 39/39, Low 34/33
Heating ; High 39/39, Low 33/32

Cooling ; 1.24 - 1.20
Heating ; 1.17 - 1.13

Cooling ; 5.6 - 5.6

Heating ; 5.2 - 5.2
Cooling ; 2.86 - 2.83
Heating ; 3.59 - 3.58

26
G ; Half Union 1/2"
L ; Half Union 1/4"
G (gas side) ; 1/2"
L (liquid side) ; 1/4"

12

0.7

2.0

3 (1.0 mm2)

10-31/32 (279)

31 -15/32 (799)

7-15/32 (190)

20 (9.0)

–
–

–

Cross-flow Fan

AS + Glass Fiber 30%

Induction (4-pole)

35.5 - 33.0
15

1060 -1000
1145 - 1100
1280 - 1260

CU-A123KE

TOP VIEW

–

–

–

35.0 (1,236) - 32.8 (1,193)
Cooling ; High 49/48

Heating ; High 49/48

G ; 3-way valve 1/2"

L ; 2-way valve 1/4"

G (gas side) ; 1/2"

L (liquid side) ; 1/4"

–
–
–
–

21-1/4 (540)

27-17/32 (699)

11-7/32 (285)

86 (39.0)

Rotary (1 cylinder)

rolling piston type
Induction (2-pole)

1,100

Propeller Fan

AES + Glass Fiber 12%

Induction (6-pole)

71.0 - 67.0
25

–
–

805 - 780

– 9 –

Product Specifications

CS-A73KE

Unit
Heat
Exchanger

Refrigerant Control Device
Refrigeration Oil

Refrigeration (R-22)
Thermostat
Protection Device

Capillary Tube

Air Filter
Capacity Control

Compressor Capacitor
Fan Motor Capacitor

• Specifications are subject to change without notice for further improvement.

Description
Tube material
Fin material
Fin Type
Row / Stage

FPI
Size (W × H × L)

Length
Flow Rate
Inner Diameter
Material
Style

mm

(c.c)

g (oz)

mm

s/min

mm

µF, VAC
µF, VAC

CS-A123KE

Evaporator

Copper

Aluminium

Slit Fin

(Plate fin configuration, forced draft)

2 × 14

21

614 × 294 × 25.4

–
–
–

Electronic Control

–
–
–
–

P.P.

Honeycomb

Capillary Tube

–

1.5 µF, 400VAC

Cooling ;1,100, Heating ;470
Cooling ;6.0, Heating ; 13.4

Cooling ; 1.3, Heating ; 1.5

CU-A123KE

Condenser

Copper

Aluminium

Louver Fin

1 × 20

18

782.9 × 508 × 22
Capillary Tube

SUNISO 4GDID or

ATMOS M60 (410)

990 (34.9)

–

Overload Protector

–
–

30 µF, 370VAC

1.5 µF, 400VAC

– 10 –

CS-A73KE

Dimensions

CS-A73KE / CS-A93KE / CS-A123KE

Left piping
hole

<Side View>

Air intake
direction

Air outlet
direction

<Front View>

60

58

799

<Back View>

60

83

GAS SIDE

279

Unit : mm

190

60

Right piping hole

<Side View>

Remote control transmitter

65

36

18

Installation
plate

Indoor unit
external
dimensions
line

LIQUID SIDE

TEMP

DRAIN PORT

65

425 48

C

POWERFUL

Relative position between the indoor unit and the installation plate <Front View>

Slot (2 places)

Slot (2 places)

(49)

Right piping hole

(99)

17.8

257.2

4

(40)

(60)

Centre notch

710
550

100 100

350

Arrow

Centre

Arrow

122

16.5

Left piping hole

– 11 –

Dimensions

CU-A73KE / CU-A93KE

CS-A73KE

480

467

780 54

105105 570

27.5

93

67
77

13

245

2-way valve at
Liquid side
(High Pressure)

3-way valve at
Gas side
(Low Pressure)

280
312

CU-A123KE

Space necessary for

installation

10 cm

10 cm

100 cm

Anchor Bolt Pitch

323 x 500

699

100 500 99 (52)

7.5

540

11 67 67

69

32162

(120)

285

2-Way Valve at Liquid side
(High Pressure)

3-Way Valve at Gas side
(Low Pressure)

(323)
347

– 12 –

CS-A73KE

Refrigeration Cycle Diagram

CS-A73KE / CU-A73KE
CS-A93KE / CU-A93KE
CS-A123KE / CU-A123KE

INDOOR OUTDOOR

2-WAY
VALVE

CHECK V ALVE

C3

C1

C2

INT AKE

TEMP.

SENSOR

HEAT EXCHANGER

(EVAPORATOR)

COOLING
HEA TING

PIPE

TEMP.

SENSOR

3-WAY
VALVE

PIPE

TEMP.

SENSOR

(T .R.S)

HEAT EXCHANGER

(CONDENSER)

4-WAY VALVE

COMP.

– 13 –

Block Diagram

9C

"C"

FUSE

2A

RY-PWR

RECEIVER

P.C.B.

Indoor Unit Outdoor Unit

SINGLE PHASE

AC 220-230V

50Hz

C-FM

RY-SHI

RY-HTRANS-

FORMER

ZNR1

FAN

MOTOR

POWER SWITCH

ELECTRONIC CONTROLLER

Indicates the electronic control unit.

Indicates the number of core wires. (Example:6C=6 core wires).

MAIN

CS/CU-A73KE/A93KE

A73KEBLD.DWG

TRANSMITTER

REMOTE CONTROL

WIRELESS

MOTOR

STEPPING

5C

SENSOR

PIPE TEMP.

4C

RY-M

SSR1

ZNR1

CONTROL BOX

TEMP. FUSE

(113°C)

CR1

CR2

CR4

CR3

VALVE

4-WAY

TRS

COMP

RELAY A

B

RELAY

FM

2

1

4

3

OVERLOAD

3

4

1

2

SSR2

TEMP. SENSOR

INTAKE AIR

P.C.B.

INDICATOR

ZNR3

CT1

RY-HOT

CR5

FUSE

(102°C)

THERMAL

PROTECTOR

CR

CR

CS-A73KE

CS-A73KE / CU-A73KE

CS-A93KE / CU-A93KE

CS-A123KE / CU-A123KE

– 14 –

CS-A73KE

Wiring Diagram

CS-A73KE / CU-A73KE
CS-A93KE / CU-A93KE
CS-A123KE / CU-A123KE

220-240V, 50/60Hz

POWER SUPPLY CORD

Y/G

2

MAIN SW

W

BR

W

R

BL W

RB

312 4

BL

BL

CAPACIT OR

ELECTROLYTIC

1

Y

BR

4

31

421 3

GRY

P

L

B

Y/G

4

B

CR1

RY-PWR

AC (W)

HOT(R)

FM(B)

INDOOR UNIT
TERMINAL

OUTDOOR UNIT
TERMINAL

OVER LOAD

PROTECTOR

THERMAL

FUSE

(113°C)

RY-HOT

CR5

ZNR3

SSR2

BLBLBL

GRY

R

67

MAGNETIC RELAY B

WIRELESS

REMOTE

CONTROL

REMOTE

CONTROL No.

CN-C
B
R

CAPACITOR

CR2

W

TRS

BL

824

BR

W

1

234

AB

ELECTRONIC CONTROLLER

(G)

1
3

CN-FM(G)

CR4

CR3

FUSE T2A L250V

BL

BL

TRANSFORMER

CT1

ELECTRONIC
CONTROLLER

GRY

BL

CAPACITOR

ELECTROLYTIC

BL

428

B

ELECTRONIC

CONTROLLER

(RECEIVER)
CN-RCV (W)

WWW

CN-DISP(W)

FAN

MOTOR

W

R

R

76

MAGNETIC RELAY A

B

123 56

WWWWW

O

BR

7

531

RY-M

SSR1

ZNR1

THERMAL

FUSE

(102°C)

COIL

Y

RY-H

RY-SHI

ZNR2

CN-FUSE(B)

31

RR

REVERSING VAL VE

97658

1234 54321

CN-TH(Y) CN-STM(G)

DISPLAY LAMP

CN-DISP(W)

4321

PUMP DOWN SW

(TEST RUN)

AUTO SW

BR

R

FAN

O

MOTOR

Y
P

SENSOR

(INTAKE TEMP.)

SENSOR

(PIPE TEMP .)

YELLOW

BRAND MARK

COMPRESSOR TERMINAL

REMARKS:

B : BLUE
BR : BROWN
BL : BLACK
W : WHITE
R : RED
O : ORANGE
P : PINK
Y/G : YELLOW/

Resistance of Indoor Fan Motor Windings

MODEL

CONNECTION

YELLOW-BLUE

YELLOW-BROWN

BROWN-ORANGE

ORANGE-WHITE

WHITE-RED

Resistance of Outdoor Fan Motor Windings

MODEL

CONNECTION

BLUE-YELLOW

YELLOW-RED

CU-A73KE

CWA95245

260.5 Ω

446.0 Ω

Resistance of Compressor Windings

REDBLUE

MODEL

CONNECTION

C-R
C-S

CU-A73KE

2RS127D3CA04

4.023

8.803

GREEN

CS-A73KE

CWA92288

536.5 Ω

77.1 Ω

43.9 Ω

42.7 Ω

111.4 Ω

CU-A93KE

CU-A93KE

2PS174D3AA02

2.798 Ω

5.432 Ω

CS-A93KE

CWA92296

450.8 Ω

56.9 Ω

74.2 Ω

37.3 Ω

122.6 Ω

@

@

@

CU-A123KE

2KS224D5CA02

CS-A123KE

CWA92290

457.4 Ω

56.1 Ω

61.2 Ω

25.3 Ω

142.5 Ω

CU-A123KE

CWA95381

174.5 Ω

331.0 Ω

2.211 Ω

2.924 Ω

B

COMPRESSOR

R

CAPACITOR

Y

B

W

FAN MOTOR

B

CAPACITOR

R

J9990083

CS/CU-A73KE/A93KE/A123KE

A73KE07.DWG

– 15 –

CS-A73KE

Operation Details

1) Cooling Mode Operation

Cooling in operation according to Remote Control setting.

Time Delay Safety Control (3 minutes)

• When the compressor is stopped by Power Switch or Remote Control, it restarts after 3 minutes when the Power
Switch or Remote Control is turned ON.

• When the setting temperature is reached during cooling operation, the compressor stops and it will not start for 3
minutes.

7 minutes Time Saved Control

• The compressor will start automatically if it has stopped for 7 minutes if the room temperature is between the
compressor ON temperature and OFF temperature.

Starting Current Control

• When the compressor, outdoor fan motor & indoor fan motor are simultaneously started, the indoor fan motor will
operate 1.6 second later.

Anti-Freezing Control

• If the temperature of the indoor heat exchanger
falls continously below 2°C for 4 minutes or more,
the compressor turns off to protect the indoor heat
exchanger from freezing. The fan speed setting
remains the same.

• Compressor recommences when the indoor heat
exchanger temperature rises to 10°C (Recovery).
* 3 minutes waiting of Time Delay Safety Control

is valid for Cooling Operation.

Compressor Reverse Rotation
Protection Control

• If the compressor is operating continuously for 5 minutes or longer and the temperature difference between intake
air and indoor heat exchanger is 2.5°C or less for 2 minutes, compressor will stop and restart automatically.
(Time Delay Safety Control is valid).

Indoor Heat
Exchanger
Temperature
(°C)

10

2

Recovery

4 min

Compressor OFF

•

Compressor starts for > 5 minutes

• ∆ T < 2.5°C for 2 minutes

∆ T = Intake air temperature – Indoor heat exchanger temperature
This is to protect reverse rotation of the compressor when there is a instantaneous power failure.

Compressor

➡➡

OFF

– 16 –

Compressor

restarts

(3 minutes waiting)

CS-A73KE

Operation Details

Compressor Protection Control

• After the compressor starts for 50 seconds but the outdoor fan motor is still OFF, the compressor will stop and
restart automatically. (Time Delay Safety Control is valid).

Comp. operates for 50 secs.

and

Fan Motor OFF

• If the above phenomenon is repeated for 3 times, the compressor will stops.

• The above phenomenon is reset when there is a change to heating mode or stopped by Remote Control Switch.

Automatic Fan Speed Mode

When Automatic Fan Speed is selected at Remote Control during cooling operation.

• Fan speed rotates in the range of Hi to Me.

• Deodorizing Control.

Indoor

Fan

stop stop stop

stop

40"

➡➡

.

.

.

✕

.

1

SLo SLo SLo SLo

30"

Compressor

OFF

20"

40"

30"160"

Compressor

restarts

(3 minutes waiting)

.

.

.

✕

.

2

Comp.

ON ONOFF

* 1 Fan Speed is Hi until the compressor stops (when the room temperature reaches
setting temperature).

* 2 Fan Speed is Me after the compressor restarts.
* SLo: Indoor Fan rotates at 4 second intervals at low speed.

– 17 –