Panasonic CS-A73KE User manual

ServiceManual
Room Air Conditioners
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
CS-A73KE / CU-A73KE
CS-A93KE / CU-A93KE
CS-A123KE / CU-A123KE
ORDER NO. MAC9902015C2
 1999 Matsushita Air-Conditioning Corp. Sdn. Bhd.
(183914D)
All rights reserved. Unauthorized copying and distribu-
tion is a violation of law.
Untitled-16 6/19/00, 11:26 AM1

– 1 –
MAC9512086C2
CS-A73KE
• 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.
Features
PRECAUTION OF LOW TEMPERATURE
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigeration circuit.
!!
!!
!
WARNING
Thisserviceinformationisdesignedforexperienced repairtechniciansonlyandis notdesigned foruse bythe generalpublic.Itdoesnotcontain
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.
!!
!!
!
Untitled-10 6/19/00, 11:04 AM1

– 2 –
MAC9512086C2
CS-A73KE
Remote Control
Functions
Operation OFF / ON
OFF / ON IRoom Temperature Setting TEMP.
• Temperature Setting (16°C to 30°C)
• Automatic Operation
Operation with 2°C higher than
standard temperature.
Operation with standard
temperature.
Operation with 2°C lower than
standard temperature.
Operation Mode Selection
•AUTO Automatic Operation Mode
•HEAT Heating Operation Mode
•COOL Cooling Operation Mode
•DRY Soft Dry Operation Mode
MODE
TIMER Time / Timer Setting
• Hours and minutes setting.
Clock Setting
• Current time setting.
Sleep Mode Operation OFF / ON
SLEEP
Indoor Fan Speed Selection
FAN SPEED
•h j k Low Speed
l
•h j k Medium Speed
lll
•h j k High Speed
lllll
•AUTO FAN Automatic Fan Speed
•AUTO Automatic Airflow Direction
Control
•MANUAL Airflow Direction Manual Control
Airflow Direction Control
• 24-hour, OFF / ON Real Timer Setting.
ON-TIMER
OFF-TIMER Timer Operation Selection
SET
CANCEL Timer Operation Set / Cancel
• ON Timer and OFF Timer setting and
cancellation.
AIR SWING
Powerful Mode Operation OFF/ON
POWERFUL
Economy Mode Operation OFF/ON
ECONOMY
8 HI
a
a
a
9 Lo
CLOCK
Untitled-10 6/19/00, 11:04 AM2

– 3 –
MAC9512086C2
CS-A73KE
Indoor Unit
Functions
Power Switch OFF / ON
POWER I
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.
AUTO
OFF / ON
Operation Test Running / Pump
Down Switch
TEST RUN
OFF / ON
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 (Orange)..... Lights up in Powerful
Mode Operation
•ECONOMY (Green)..... Lights up in Economy
Mode Operation
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)
• Used when test running or servicing.
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 avail-
able.
Airflow Direction Control
• Automatic air swing and manual adjusted
by remote control for vertical airflow.
• Manually adjusted by hand for horizontal
airflow.
Operation Mode
• Heating, Cooling, Soft Dry and
Automatic Mode. Time Delay Safety Control
• Restarting is inhibited for appro. 3 minutes.
7 Minutes Time Save Control
• Cooling Operation only.
Starting Current Control
Powerful Operation
• Reaches the desired room temperature
quickly.
Economy Operation
• To reduce electrical power consumption.
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
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– 4 –
MAC9512086C2
CS-A73KE
Compressor Reverse Rotation
Protection Control
Outdoor Unit
Functions
• 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
CU-A73KE, CU-A93KE
Deice Control
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 ex-
changer temperature reaches 65°C or
above. (Heating 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
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).
• To prevent frosting at outdoor heat
exchanger. (Only for Heating Operation)
• Temperature of outdoor heat exchanger is
sensed by TRS (Thermal Reed Switch).
Untitled-10 6/19/00, 11:04 AM4

– 5 –
MAC9512086C2
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
Number of core-wire
Dimensions
Net Weight
Compressor
Air Circulation
Inner diameter
Length
Input
Running Current
COP
Starting Current
Height
Width
Depth
Type
Motor Type
Rated Output
Type
Material
Motor Type
Input
Rated Output
Fan Low
Speed Medium
High
Indoor Air (Lo)
Indoor Air (Me)
Indoor Air (Hi)
Outdoor Air
Unit
kW
Btu/h
kW
Btu/h
s/h
Pint/h
Phase
V
Cycle
OUTLET
INTAKE
m3/min (cfm)
m3/min (cfm)
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
2.20 - 2.10
7,500 - 7,200
2.45 - 2.40
8,360 - 8,200
1.4
3.0
Single
230 - 220
50
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
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
CS-A73KE
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
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
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)
29.0 - 27.0
10
835 - 810
945 - 920
1055 - 1030
Untitled-10 6/19/00, 11:04 AM5

– 6 –
MAC9512086C2
CS-A73KE
Product Specifications
Description
Tube material
Fin material
Fin Type
Row / Stage
FPI
Size (W ×H ×L)
µF, VAC
µF, VAC
Length
Flow Rate
Inner Diameter
Material
Style
Heat
Exchanger
Refrigerant Control Device
Refrigeration Oil
Refrigerant (R-22)
Thermostat
Protection Device
Capillary Tube
Air Filter
Capacity Control
Compressor Capacitor
Fan Motor Capacitor
Unit
mm
(c.c)
g (oz)
mm
s/min
mm
(Plate fin configuration, forced draft)
Capillary Tube
• Specifications are subject to change without notice for further improvement.
CS-A73KE
Evaporator
Copper
Aluminium
Slit Fin
2 ×14
18
614 ×294 ×25.4
–
–
–
Electronic Control
–
–
–
–
P.P.
Honeycomb
–
1.5 µF, 400VAC
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
Cooling ;850, Heating ;360
Cooling ;4.5, Heating ;10.5
Cooling ;1.1, Heating ;1.3
–
15 µF, 440VAC
1.2 µF, 400VAC
Untitled-10 6/19/00, 11:04 AM6

– 7 –
MAC9512086C2
CS-A73KE
Product Specifications
Inner diameter
Length
Input
Running Current
COP
Starting Current
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
Number of core-wire
Dimensions
Net Weight
Compressor
Air Circulation
Height
Width
Depth
Type
Motor Type
Rated Output
Type
Material
Motor Type
Input
Rated Output
Fan Low
Speed Medium
High
Unit
kW
Btu/h
kW
Btu/h
s/h
Pint/h
Phase
V
Cycle
OUTLET
INTAKE
m3/min (cfm)
m3/min (cfm)
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
Indoor Air (Lo)
Indoor Air (Me)
Indoor Air (Hi)
Outdoor Air
CS-A93KE
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
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
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)
37.0 - 34.0
14
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
2.80 - 2.70
9,550 - 9,200
3.40 - 3.30
11,590 - 11,250
1.6
3.4
Single
230 - 220
50
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
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– 8 –
MAC9512086C2
CS-A73KE
Product Specifications
Heat
Exchanger
Refrigerant Control Device
Refrigeration Oil
Refrigeration (R-22)
Thermostat
Protection Device
Capillary Tube
Air Filter
Capacity Control
Compressor Capacitor
Fan Motor Capacitor
Description
Tube material
Fin material
Fin Type
Row / Stage
FPI
Size (W ×H ×L)
µF, VAC
µF, VAC
Length
Flow Rate
Inner Diameter
Material
Style
• Specifications are subject to change without notice for further improvement.
Unit
mm
(c.c)
g (oz)
mm
s/min
mm
(Plate fin configuration, forced draft)
Capillary Tube
CS-A93KE
Evaporator
Copper
Aluminium
Slit Fin
2 ×14
18
614 ×294 ×25.4
–
–
–
Electronic Control
–
–
–
–
P.P.
Honeycomb
–
1.5 µF, 400VAC
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
Cooling ; 1,075, Heating ; 325
Cooling ; 5.0, Heating ; 13.4
Cooling ; 1.2, Heating ; 1.4
–
–
25 µF, 370VAC
1.2 µF, 400VAC
Untitled-10 6/19/00, 11:04 AM8

– 9 –
MAC9512086C2
CS-A73KE
Product Specifications
Inner diameter
Length
Input
Running Current
COP
Starting Current
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
Number of core-wire
Dimensions
Net Weight
Compressor
Air Circulation
Height
Width
Depth
Type
Motor Type
Rated Output
Type
Material
Motor Type
Input
Rated Output
Fan Low
Speed Medium
High
Unit
kW
Btu/h
kW
Btu/h
s/h
Pint/h
Phase
V
Cycle
OUTLET
INTAKE
m3/min (cfm)
m3/min (cfm)
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
Indoor Air (Lo)
Indoor Air (Me)
Indoor Air (Hi)
Outdoor Air
3.55 - 3.40
12,110 - 11,590
4.20 - 4.05
14,320 - 13,810
2.1
4.4
Single
230 - 220
50
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
CS-A123KE
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
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
Untitled-10 6/19/00, 11:04 AM9

– 10 –
MAC9512086C2
CS-A73KE
Product Specifications
Description
Tube material
Fin material
Fin Type
Row / Stage
FPI
Size (W ×H ×L)
µF, VAC
µF, VAC
Length
Flow Rate
Inner Diameter
Material
Style
Unit
mm
(c.c)
g (oz)
mm
s/min
mm
(Plate fin configuration, forced draft)
Capillary Tube
• Specifications are subject to change without notice for further improvement.
CS-A123KE
Evaporator
Copper
Aluminium
Slit Fin
2 ×14
21
614 ×294 ×25.4
–
–
–
Electronic Control
–
–
–
–
P.P.
Honeycomb
–
1.5 µF, 400VAC
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
Cooling ;1,100, Heating ;470
Cooling ;6.0, Heating ; 13.4
Cooling ; 1.3, Heating ; 1.5
–
–
30 µF, 370VAC
1.5 µF, 400VAC
Heat
Exchanger
Refrigerant Control Device
Refrigeration Oil
Refrigeration (R-22)
Thermostat
Protection Device
Capillary Tube
Air Filter
Capacity Control
Compressor Capacitor
Fan Motor Capacitor
Untitled-10 6/19/00, 11:04 AM10

– 11 –
MAC9512086C2
CS-A73KE
799
60
58 60 83
279
60
36
190
65 18
122
TEMP
POWERFUL
C
425 48
GAS SIDE
LIQUID SIDE
DRAIN PORT
65
(40) 710 (49)
257.2 17.8
(60) (99)
100 100
350
4
550 16.5
Dimensions
CS-A73KE / CS-A93KE / CS-A123KE
Right piping hole
Centre notch
Slot (2 places)
Left piping hole
Slot (2 places)
Unit : mm
<Front View>
Left piping
hole
<Back View>
Installation
plate
Indoor unit
external
dimensions
line
Right piping hole
Air intake
direction
Remote control transmitter
Air outlet
direction
<Side View> <Side View>
Relative position between the indoor unit and the installation plate <Front View>
Arrow
Centre Arrow
Untitled-10 6/19/00, 11:04 AM11

– 12 –
MAC9512086C2
CS-A73KE
11 67 67
540
285
(323)
347
7.5
100 cm
10 cm
10 cm
100 500 99 (52)
69
32162
(120)
699
Dimensions
CU-A123KE
CU-A73KE / CU-A93KE
Anchor Bolt Pitch
323 x 500
Space necessary for
installation
2-Way Valve at Liquid side
(High Pressure)
3-Way Valve at Gas side
(Low Pressure)
67
77
105105 570
467 480
280
312
245
2-way valve at
Liquid side
(High Pressure)
13
Gas side
(Low Pressure)
3-way valve at
93 27.5
780 54
Untitled-10 6/19/00, 11:04 AM12

– 13 –
MAC9512086C2
CS-A73KE
Refrigeration Cycle Diagram
CS-A73KE / CU-A73KE
CS-A93KE / CU-A93KE
CS-A123KE / CU-A123KE
COMP.
4-WAY VALVE
C1
C3 C2
CHECK VALVE
PIPE
TEMP.
SENSOR
(T.R.S)
SENSOR
TEMP.
INTAKE
PIPE
TEMP.
SENSOR
INDOOR OUTDOOR
COOLING
HEATING
HEAT EXCHANGER
(EVAPORATOR) HEAT EXCHANGER
(CONDENSER)
2-WAY
VALVE
VALVE
3-WAY
Untitled-10 6/19/00, 11:04 AM13

– 14 –
MAC9512086C2
CS-A73KE
CS-A73KE / CU-A73KE CS-A93KE / CU-A93KE CS-A123KE / CU-A123KE
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
Untitled-9 6/19/00, 10:59 AM14

– 15 –
MAC9512086C2
CS-A73KE
Wiring Diagram
REMARKS:
B : BLUE
BR : BROWN
BL : BLACK
W : WHITE
R : RED
O : ORANGE
P : PINK
Y/G : YELLOW/
GREEN
MODEL
CONNECTION
YELLOW-BLUE
YELLOW-BROWN
BROWN-ORANGE
ORANGE-WHITE
WHITE-RED
Resistance of Indoor Fan Motor Windings
CS-A73KE
CWA92288
536.5 Ω
77.1 Ω
43.9 Ω
42.7 Ω
111.4 Ω
CS-A123KE
CWA92290
457.4 Ω
56.1 Ω
61.2 Ω
25.3 Ω
142.5 Ω
CS-A93KE
CWA92296
450.8 Ω
56.9 Ω
74.2 Ω
37.3 Ω
122.6 Ω
MODEL
CONNECTION
BLUE-YELLOW
YELLOW-RED
Resistance of Outdoor Fan Motor Windings
CU-A73KE
CWA95245
260.5 Ω
446.0 Ω
CU-A123KE
CWA95381
174.5 Ω
331.0 Ω
CU-A93KE
@
@
@
MODEL
CONNECTION
C-R
C-S
CU-A73KE
2RS127D3CA04
4.023
8.803
CU-A123KE
2KS224D5CA02
2.211 Ω
2.924 Ω
CU-A93KE
2PS174D3AA02
2.798 Ω
5.432 Ω
Resistance of Compressor Windings
CS-A73KE / CU-A73KE
CS-A93KE / CU-A93KE
CS-A123KE / CU-A123KE
YELLOW
REDBLUE
COMPRESSOR TERMINAL
BRAND MARK
CN-FUSE(B)
CR4
31
RR
R
R
(PIPE TEMP.)
SENSOR
AC (W)
ZNR1
(TEST RUN)
Y
7
MOTOR
BL BL
CONTROLLER
ELECTRONIC
1
CN-C
(G)
ELECTRONIC CONTROLLER
4
31
2
CONTROL No.
REMOTE
AB
BR
R
O
Y
P
Y/G
B
R
W
R
BR
O
W
531
W
BR
FUSE T2A L250V
L
P
MOTOR
FAN
SSR1
CAPACITOR CN-FM(G)
ZNR2 RY-SHI
RY-H
RY-PWR
TRANSFORMER
PUMP DOWN SW
AUTO SW
CN-RCV (W)
(RECEIVER)
ELECTRONIC
CONTROLLER
WIRELESS
REMOTE
CONTROL
CN-DISP(W)
DISPLAY LAMP
POWER SUPPLY CORD
BR
B
Y/G
W W W W
SENSOR
(INTAKE TEMP.)
1234 54321
CN-TH(Y) CN-STM(G)
FAN
4321
234
MAIN SW
CN-DISP(W)
THERMAL
FUSE
(102°C)
THERMAL
FUSE
(113°C)
RY-M
CR3 CR1 CR2
1
3
B
97658
123 56
W W W W W
J9990083
CS/CU-A73KE/A93KE/A123KE
A73KE07.DWG
220-240V, 50/60Hz
428
76
67
824
421 3
312 4
4
1
ZNR3
SSR2
FM(B)
CR5
RY-HOT
HOT(R)
CT1
BL W RB
W
GRY
BL
BL
BL
BL
BL
TRS
BL
BL
GRY
GRY
BL
R
BR
B
B
B
B
RCAPACITOR
FAN MOTOR
Y
Y
W
RB
OVER LOAD
PROTECTOR
MAGNETIC RELAY A
MAGNETIC RELAY B
CAPACITOR
ELECTROLYTIC
REVERSING VALVE
COIL
CAPACITOR
ELECTROLYTIC
TERMINAL
INDOOR UNIT
OUTDOOR UNIT
TERMINAL
CAPACITOR
COMPRESSOR
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– 16 –
MAC9512086C2
CS-A73KE
Operation Details
1) Cooling Mode Operation
Cooling in operation according to Remote Control setting.
• 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.
• 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.
• When the compressor, outdoor fan motor & indoor fan motor are simultaneously started, the indoor fan motor will
operate 1.6 second later.
• 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).
∆ T = Intake air temperature – Indoor heat exchanger temperature
This is to protect reverse rotation of the compressor when there is a instantaneous power failure.
Time Delay Safety Control (3 minutes)
7 minutes Time Saved Control
Starting Current Control
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
• Compressor starts for >5 minutes
• ∆ T <2.5°C for 2 minutes
Compressor
restarts
(3 minutes waiting)
Compressor
OFF
➡➡
Recovery
4 min
Compressor OFF
Indoor Heat
Exchanger
Temperature
(°C)
2
10
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– 17 –
MAC9512086C2
CS-A73KE
Operation Details
Compressor
restarts
(3 minutes waiting)
Compressor
OFF
➡➡
Comp. operates for 50 secs.
and
Fan Motor OFF
• 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).
• 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.
Compressor Protection Control
Automatic Fan Speed Mode
*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.
Indoor
Fan
Comp.
SLo SLo SLo SLo
ON ONOFF
stop stop stop
30"
stop
30"160"
1
40" 40"
20"
✕
..
.
.2
✕
..
.
.
When Automatic Fan Speed is selected at Remote Control during cooling operation.
• Fan speed rotates in the range of Hi to Me.
• Deodorizing Control.
Untitled-9 6/19/00, 11:00 AM17

– 18 –
MAC9512086C2
CS-A73KE
Cooling Operation Time Diagram
<Description of operation>
d – g : Time Delay Safety Control (waiting for 3 minutes)
g – h : 60 sec. Forced Operation
h – o : 7 min. Time Saved Control
q – t : Anti Freezing Control
Operation
Stop
abcdefghijklmnopqrstuvwxyz
Basic Time
Compressor
Indoor Fan
Outdoor Fan
Operation LED
1’ 3’ 1’ 7’ 1’ 4’
1.5K
ON
OFF
Intake
Temperature
Set Temp.
10°C
2°C
Pipe temperature
Operation Details
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– 19 –
MAC9512086C2
CS-A73KE
Operation Details
2) Soft Dry Mode Operation
• The unit starts cooling operation until the room temperature reaches the setting temperature set on the Remote
Control, and then Soft Dry operation will start.
• During Soft Dry operation, the Indoor Fan will operate and stop at 4-second intervals at low speed.
• The operation will be switched on and off for up to 10 minutes “ON” and 6 minutes “OFF”. Once Soft Dry opera-
tion is turned off, it stops for 6 minutes.
• Once the compressor stops, it will not start for 3 minutes during Cooling operation.
• Same as Starting Current Control for Cooling Mode operation.
• Same as Anti-Freezing Control for Cooling Mode operation. (For Soft Dry region, 6 minutes waiting is valid during
compressor stops.)
• Same as Compressor Reverse Rotation Protection Control for Cooling Mode Operation. (For Soft Dry region, 6
minutes waiting is valid during compressor stops.)
• Same as Compressor Protection Control for Cooling Mode Operation.
When Automatic Fan Speed is selected at Remote Control during Soft Dry Operation.
• Fan speed rotates at SLo and Lo speed.
• Deodorizing Control.
*SLo: Indoor Fan rotates at 4-second intervals at low speed.
Time Delay Safety Control
Starting Current Control
Anti-Freezing Control
Compressor Reverse Rotation
Protection Control
Compressor Protection Control
Automatic Fan Speed Mode
Indoor
Fan
COMP
stop stop stop
SLo Lo SLo
ON ON
OFF
40" 40"6'
Untitled-9 6/19/00, 11:00 AM19