Panasonic CS-A181KE, CS-A241KE, CU-A241KE, CU-A181KE Service Manual
ORDER NO. MAC9811041C2
Service Manual
Room Air Conditioners
CS-A181KE / CU-A181KE
CS-A241KE / CU-A241KE
Contents
● Features ..........................................................1
● Functions ...................................................2 – 4
● Product Specifications ...............................5 – 8
● Dimensions ..............................................9 – 10
● Refrigeration Cycle Diagram .........................10
● Block Diagram ...............................................11
● Wiring Diagram .............................................. 12
● Operation Details ...................................13 – 22
● Installation Information ..........................23 – 24
● 3-way Valves .........................................25 – 31
● Servicing Information .............................32 – 35
● Troubleshooting Guide ..........................36 – 37
● Technical Data.......................................38 – 40
● Exploded View .........................................41, 43
● Replacement Parts List ...........................42, 44
● Electronic Parts List ............................... 45 – 46
1999 Matsushita Air-Conditioning Corp. Sdn. Bhd.
(183914D)
All rights reserved. Unauthorized copying and distribution is a violation of law.
CS-A181KE
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.
Features
WARNING
!
!
PRECAUTION OF LOW TEMPERATURE
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigeration circuit.
• High Efficiency
• High Efficiency Airflow Circuit
• Compact Design
• Removable and Washable
Front Panel
• Auto Restart after Power Failure
• Long Piping up to 25m
• Deodorizing Air Filter
• Deodorizing Control during
operation
– 1 –
Functions
Remote Control
CS-A181KE
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
• AUTOFAN Automatic Fan Speed
Airflow Direction Control
• SWING Automatic Airflow Direction
Control
• MANUAL Airflow Direction Manual Control
TEMP.
ON-TIMER
OFF-TIMER
TIME
SET
CANCEL
CLOCK
(q)
Room Temperature Setting
• Temperature Setting (16˚C to 30˚C)
• Automatic Operation
m / n 2˚C lower than standard
n Standard
n - o 2˚C higher than standard
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.
– 2 –
SLEEP
Sleep Mode Operation OFF / ON
CS-A181KE
Functions
Indoor Unit
POWER I
AUTO
OFF / ON
TEST RUN
OFF / ON
Power Switch OFF / ON
Auto Operation Switch
• Used when the remote control cannot be
used.
Remote Control Signal Receiving
Sound Control
• It can be controlled by pressing Auto
Operation Switch 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
and Hot Start operation.
• SLEEP (Orange)..... Lights up in Sleep
Mode Operation.
• TIMER (Orange)..... Lights up in Timer
Setting.
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.
Auto Restart Control
• Operation is restarted 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 Super Low fan
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.
Hot-Start Control
• The indoor fan stops until the indoor heat
exchanger temperature over 30°C.
• The indoor fan operates at SLo and Lo
when indoor heat exchanger temperature
reaches 30°C ~ 42°C.
• Hot start is completed when indoor heat
exchanger reaches 42°C.
–
➝
– 3 –
Functions
Outdoor Unit
CS-A181KE
4-Way Valve Control
• When the unit is switched to "OFF" during
Heating operation, 4-way valve stays at
Heating Position for 5 minutes.
Overload Protector
• Inner protector (Compressor, Fan Motor).
60 Secs. Forced Operation Control
• Once the compressor is activated, it does
not stop for 60 secs. (Stops immediately
with remote control stop signal.)
Outdoor Fan Operation Control
•
4-pole induction motor (2-speed)
• For Cooling or Soft Dry Operation
Hi-speed … when outdoor temperature
reaches to 31°C
Lo-speed … when outdoor temperature
reaches to 29°C
• For Heating Operation
Hi-speed ... when outdoor temperature
reaches to 13.5°C.
Lo-speed ... when outdoor temperature
reaches to 15.5°C.
• For Over-heating Protection, the Fan is
switched ON or OFF depending on the
piping temperature and the outdoor temperature.
2-Way Valve Control
• 2-way valve is ON for 1 minutes after
compressor start. Other than this, 2-way
valve is OFF. (A241K only)
Deice Control
•
To prevent frosting at outdoor heat
exchanger during Heating Operation.
– 4 –
CS-A181KE
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)
3
m
/min (cfm)
dB (A)
kW
A
W/W
A
inch
inch
inch
inch
mm
m
m
inch (mm)
inch (mm)
inch (mm)
lb (kg)
kW
W
W
rpm
rpm
rpm
CS-A181KE
5.20 - 5.15
17,700 - 17,600
6.20 - 6.05
21,100 - 20,600
2.9
6.1
Single
240 - 220
50
SIDE VIEW
Cooling ; 11.2 (395)
Heating ; 11.6 (409)
Cooling ; 12.4 (437)
Heating ; 12.9 (455)
Cooling ; 13.7 (480)
Heating ; 14.2 (500)
Cooling ; 11.8 (416)
Heating ; 12.2 (430)
Cooling ; High 43 - 43, Low 38 - 38 Cooling ; High 56 - 54
Heating ; High 42 - 42, Low 38 - 38 Heating ; High 57 - 55
G ; Half Union 1/2"
L ; Half Union 1/4"
G (gas side) ; 1/2"
L (liquid side) ; 1/4"
AS + Glass Fiber 30%
Transistor (4-poles)
Cooling ; 980 Heating ; 980
Cooling ; 1,090 Heating ; 1,090
Cooling ; 1,200 Heating ; 1,240
–
Cooling ; 2.12 - 1.98
Heating ; 2.19 - 2.04
Cooling ; 10.9 - 10.0
Heating ; 11.2 - 10.2
Cooling ; 2.45 - 2.60
Heating ; 2.83 - 2.97
16
0.75
2.1
2
3 (1.5 mm
11-7/16 (290)
38-19/32 (980)
7-11/16 (195)
29 (13)
Cross-flow Fan
)
–
–
–
–
20
51
CU-A181KE
TOP VIEW
–
–
–
G ; 3-way valve 1/2"
L ; 3-way valve 1/4"
G (gas side) ; 1/2"
L (liquid side) ; 1/4"
–
–
–
–
26-31/32 (685)
31-1/2 (800)
11-13/16 (300)
137 (62)
Rotary (1 cylinder)
rolling piston type
Induction (2-poles)
1.7
Propeller Fan
PC + AES + Glass Fiber 15%
Induction (4-poles)
136.3
72
670 - 600
–
1,030 - 950
– 5 –
Product Specifications
CS-A181KE
Unit
Heat
Exchanger
Refrigerant Control Device
Refrigeration Oil
Refrigerant (R-22)
Thermostat
Protection Device
Capillary Tube
Air Filter
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
(cm3)
g (oz)
mm
s/min
mm
µF, VAC
µF, VAC
CS-A181KE
Evaporator
Copper
Aluminium
Slot Fin
(Plate fin configuration, forced draft)
2 × 14
21
732 × 294 × 25.4
–
–
–
Electronic Control
–
–
–
–
P.P.
Honeycomb
–
–
Cooling ; 690 Heating ; 650
Cooling ; 13.0 Heating ; 20.9
Cooling ; 1.6 Heating ; 1.9
CU-A181KE
Condenser
Copper
Aluminium
Corrugated Fin
2 × 26
14
769.2
× 660.4 × 44
732.9
Capillary Tube
SUNISO 4GDID or
ATMOS M60 (700)
1,590 (56.1)
–
Inner Protector
–
35 µF, 370VAC
3.0 µF, 400VAC
– 6 –
CS-A181KE
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)
3
m
/min (cfm)
dB (A)
kW
A
W/W
A
inch
inch
inch
inch
mm
m
m
inch (mm)
inch (mm)
inch (mm)
lb (kg)
kW
W
W
rpm
rpm
rpm
CS-A241KE
6.45 - 6.40
22,000 - 21,800
7.80 - 7.55
26,600 - 25,700
3.8
8.0
Single
240 - 220
50
SIDE VIEW
Cooling ; 13.1 (462)
Heating ; 14.1 (497)
Cooling ; 14.3 (504)
Heating ; 15.4 (542)
Cooling ; 15.7 (550)
Heating ; 16.9 (600)
Cooling ; 14.3 (504)
Heating ; 15.4 (542)
Cooling ; High 47 - 47, Low 41 - 41 Cooling ; High 61 - 59
Heating ; High 46 - 46, Low 41 - 41 Heating ; High 62 - 60
G ; Half Union 5/8"
L ; Half Union 1/4"
G (gas side) ; 5/8"
L (liquid side) ; 1/4"
AS + Glass Fiber 30%
Transistor (4-poles)
Cooling ; 1,100 Heating ; 1,200
Cooling ; 1,200 Heating ; 1,320
Cooling ; 1,320 Heating ; 1,410
–
Cooling ; 2.86 - 2.67
Heating ; 2.96 - 2.74
Cooling ; 14.0 - 13.2
Heating ; 14.3 - 13.5
Cooling ; 2.26 - 2.40
Heating ; 2.64 - 2.76
16
0.75
2.1
29 (13)
–
–
–
–
40
2
)
3 (2.5 mm
11-7/16 (290)
38-19/32 (980)
7-11/16 (195)
Cross-flow Fan
66
CU-A241KE
TOP VIEW
–
–
–
G ; 3-way valve 5/8"
L ; 3-way valve 1/4"
G (gas side) ; 5/8"
L (liquid side) ; 1/4"
–
–
–
–
26-31/32 (685)
31-1/2 (800)
11-13/16 (300)
146 (66)
Rotary (1 cylinder)
rolling piston type
Induction (2-poles)
2.2
Propeller Fan
PC + AES + Glass Fiber 15%
Induction (4-poles)
179.0
108
720 - 635
–
1,200 - 1,140
– 7 –
Product Specifications
CS-A181KE
Unit
Heat
Exchanger
Refrigerant Control Device
Refrigeration Oil
Refrigerant (R-22)
Thermostat
Protection Device
Capillary Tube
Air Filter
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
3
)
(cm
g (oz)
mm
s/min
mm
µF, VAC
µF, VAC
CS-A241KE
Evaporator
Copper
Aluminium
Slot Fin
(Plate fin configuration, forced draft)
2 × 14
21
732 × 294 × 25.4
–
–
–
Electronic Control
–
–
–
–
P.P.
Honeycomb
–
–
Cooling ; 700 Heating ; 649
Cooling ; 17.5 Heating ; 27.0
Cooling ; 1.8 Heating ; 2.4
CU-A241KE
Condenser
Copper
Aluminium
Corrugated Fin
2 × 26
16
769.2
× 660.4 × 44
732.9
Capillary Tube
SUNISO 4GDID or
ATMOS M60 (1,130)
1,770 (62.5)
–
Inner Protector
–
50 µF, 370VAC
3.0 µF, 450VAC
– 8 –
CS-A181KE
Dimensions
CS-A181K / CS-A241K
<Top View>
Air outlet direction
Left piping hole
Air intake
direction
<Front View>
290
980
Lower piping hole
Installation plate hooks
Drain ports
165
195
Approx
2,100
<Side View>
48.5
60
Remote control transmitter
Right piping hole
52
59
6
142
Relative position between the indoor unit and the installation plate <Front View>
(39)
Installation plate
Indoor unit external
dimensions line
7
276
7
(59.5)
Left piping hole
Unit : mm
Gas side Liquid side
55
Approx. 706
Slot (2 places)
892
561
100 100
Arrow
(Ø 70)
Centre
piping hole
350
Arrow
(335.5)
Installation plate positioning gauge
(Ø 70)
– 9 –
Slot (2 places)
(49)
(165)
Right piping hole
(Ø 70)
13.5
57
16
Dimensions
CU-A181K / CU-A241K
Required space for installation
10cm
10cm
Air intake direction
CS-A181KE
56.3800
35
100cm
Anchor bolt pitch 330 x 540
Air outlet direction Slots (12 x 17) Four places
663
685
Unit : mm
Refrigeration Cycle Diagram
CS/CU-A181K
CS/CU-A241K
106.5
300
3-way valve at
liquid side
7577.5
130130 540
22
330
370
3-way valve at
gas side
INDOOR UNIT OUTDOOR UNIT
HEAT EXCHANGER
(EVAPORATOR)
SENSOR
INTAKE
AIR TEMP.
SENSOR
PIPE
TEMP.
3-WAY VALVE
3-WAY VALVE
STRAINER
ACCUMULATOR
(SUB)
COMPRESSOR
CAPILLARY TUBE
CHECK VALVE
4-WAY
VALVE
OIL
SEPARATOR
CAPILLARY TUBE
ONLY OIL
SENSOR
PIPE
TEMP.
HEAT EXCHANGER
(CONDENSER)
CU-A241K ONLY
2-WAY VALVE
COOLING
HEATING
SENSOR
INTAKE
(AIR TEMP.)
PROCESS
TUBE
V
– 10 –
CS-A181KE
POWER
SWITCH
INDOOR UNIT OUTDOOR UNIT
SINGLE
PHASE
240-220V
50Hz
(113°C)
THERMAL FUSE
22
11
WIRELESS
REMOTE CONTROL
TRANSMITTER
LH
C
ZNR
RY-PWR
RY-HOT
ELECTRONIC CONTROLLER
4 4
33
TRANSFORMER2
FUSE
3.15A
FUSE
3.15A
ZNR2
RY-HOT
ZNR1
COMP
F/M
RY-V
RY-OFF
RY-DEICE
2-WAY
TRANSFORMER1
RY-H/L
TRANS-
FORMER
4-WAY VALVE
VALVE
CU-A241K
ONLY
O.L.P.
P.C.B.
RECEIVER
SENSOR
6C
S/M
INDICATORS
5C
4C
SENSOR
4C
ZNR3 ZNR4
3.15A
FUSE
3C
F/M
ELECTRONIC CONTROLLER
THERMAL
FUSE (102°C)
Indicates the number of core wires. (Example: 6C=6 core wires)
"C"
Indicates the electronic control unit.
MAIN
PC1
ZNR2
STEPPING
MOTOR
FAN MOTOR
INDOOR
Block Diagram
CS-A181KE / CU-A181KE
CS-A241KE / CU-A241KE
– 11 –
O
M
R
W
Wiring Diagram
CS-A181KE / CU-A181KE
CS-A241KE / CU-A241KE
CS-A181KE
240/220V, 50Hz
POWER SUPPLY CORD
YLW/GRN
BRW
2
1
MAIN SW
BRW
BLK
WHT
WHT
RED
CORE
BLU
THERMAL FUSE (102°C)
RED
4
3
BLU
(A241K ONLY)
RED
CN-FUSE1(BLU)
AC (BRW)
COMP(BLK)
THERMAL FUSE
(113°C)
CN-FUSE2
AC(WHT)
HOT(RED)
DEICE (BLU)
RED
CN-T(WHT)
1
3
P
L
1
2
BLK
T (BLK)
FUSE (3.15A)
ZNR
ZNR
RY-HOT
ELECTRONIC
CONTROLLER
RED
T (BLK)
TRANSFORMER
BLK
PUMP
DOWN SW
(SW1)
REMOTE
CONTROL No
BA
WIRELESS
REMOTE
CONTROL
AUTO SW
ELECTRONIC
CONTROLLER
RECEIVER+
()
DISPLAY LAMP
CN-DISP (WHT)
654
WHT
1
WHT
2
WHT
3
WHT
4
WHT
5
CN-DISP (WHT)
WHT
6
BRW
1
RED
2
ORG
3
MOTOR
YLW
CN-STMCN-TH (YLM)
4
PNK
5
(AIR TEMP.)
1324
SENSOR SENSOR
(PIPE TEMP.)
YLW
1
BLU
FAN
2
MOTOR
RED
3
CN-MTR (GRN)
321
REMARKS:
BLU : BLUE
BRW : BROWN
BLK : BLACK
WHT : WHITE
RED : RED
ORG : ORANGE
PNK : PINK
YLW : YELLOW
GRN : GREEN
GRY : GRAY
VLT : VIOLET
INDOOR UNIT TERMINAL
21
3
312
BLU
BLU
ELECTRONIC
CONTROLLER
TRANSFORMER1
TRANSFORMER2
COIL
(2-WAY VALVE)
FUSE
BLU BLU
CAPACITOR
RED
T 3.15A L 250V
YLW/GRN
4
4
VLT
COMP(VLT) AC(WHT)
ZNR2
BLU
OUTDOOR UNIT
TERMINAL
WHT
FUSE (3.15A)
RY-V
V(BLU)
RED
GRY
RY-DEICE
RY-OFF
ZNR4
RY-H/L
FM2(ORG) FM1(BRW)
(A241K ONLY)
ORG
BRW
FAN MOTOR
BLK
BLK
RY-HOT
HOT2(BLK)HOT1(RED) DEICE (GRY)
YLW
COIL
(4-WAY VALVE)
ZNR3
1
2
3
CN-TH(WHT)
4
WHT
SENSOR
SENSOR
O.L.P.
(TEMP.)
YLW
BLU
RED
CAPACITOR
(AIR TEMP.)
(PIPE TEMP.)
(BLU)
COMPRESSOR TERMINAL
COMPRESSOR
(YLW)
YELLOW
BLUE
(BLU)
COMPRESSO
TRADE MARK
(YL
YELL
TRADE
(RED)
Resistance of Outdoor Fan Motor Windings
CU-A181KE
CONNECTION
BLUE - BROWN
BROWN - ORANGE
RED - BROWN
CWA92294 (Ω)
79.5
65.1
70.8
Resistance of Compressor Windings
CU-A181KE
REDBLUE
CONNECTION
C-R
C-S
2JS350D3AA02 (Ω)
0.980
3.929
CU-A241KE
CWA92295 (Ω)
46.8
64.6
73.7
CU-A241KE
2JS464D3AA02 (Ω)
0.888
2.328
– 12 –
CS-A181KE
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, Remote Control or there is a power failure, it restarts after 3
minutes when the Power Switch, Remote Control is turned ON or the power supply is resumed.
• 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 even if the room temperature is below the
compressor ON temperature.
Anti-Freezing Control
• If the temperature of the indoor heat exchanger
falls continously below 2°C for 4 minutes, 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.
Indoor Heat
Exchanger
Temperature
(°C)
10
2
Recovery
4 min
Compressor OFF
– 13 –
Operation Details
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.
CS-A181KE
Indoor
SLo SLo SLo SLo
Fan
stop stop stop
stop
40"
30"
Comp.
* 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.
Cooling Operation Time Diagram
Intake Air
Temperature
Comp.
ON
1.5˚C
Set Temp.
Outdoor Air
Temperature
Comp.
OFF
31˚C
29˚C
.
.
.
✕
.
1
20"
ON ONOFF
a
defghijklmnopqrstuvwxyz
b
c
Indoor
Heat
Exchanger
Temp.
10°C
2°C
40"
.
.
.
✕
.
2
30"160"
Operation
Stop
Basic Time
Compressor
Indoor Fan
Outdoor Fan
Operation LED
4 Way Valve
2 Way Valve (A241K)
<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
v – y : Outdoor Fan Control
1’ 3’ 1’ 7’ 1’
– 14 –
4’
HiHi Hi Lo Lo Lo Hi
Loading...