Panasonic CS-A18CKH User manual

1 Features 2
2 Functions 3
3 Product Specifications 6
4 Dimensions 10
5 Refrigeration Cycle Diagram 12
6 Block Diagram 13
7 Wiring Diagram 14
8 Operation Details 15
8.1. Indoor Fan Speed Control 15
8.2. Cooling Mode Operation 16
8.3. Soft Dry Mode Operation 20
8.4. Heating Mode Operation 22
8.5. Automatic Mode Operation 27
8.6. Random Auto Restart Control 28
8.7. Airflow Direction Control 28
© 2003 Matsushita Industrial Corp. Sdn. Bhd.
(11969-T). All rights reserved. Unauthorized copying
and distribution is a violation of law.
CS-A18CKH CU-A18CKH
CS-A24CKH CU-A24CKH
8.8. Delay ON Timer Control 29
8.9. Remote Control Signal Receiving Sound 29
8.10. Powerful Mode Operation 30
8.11. Ionizer Operation 31
9 Operating Instructions 35
10 Installation Instructions 43
10.1. Safety Precautions 43
10.2. INDOOR UNIT 46
10.3. OUTDOOR UNIT 49
11 3-way Valve 53
11.1. Air Purging of the Piping and Indoor Unit 54
12 Servicing Information 60
12.1. Indoor Electronic Controllers Removal Procedures 60
12.2. Cross Flow Fan Indoor and Fan Motor Removal
Procedures 61
Air Conditioner
CONTENTS
Page Page
Order No. MAC0310028C3

13 Troubleshooting Guide 64
13.1. Refrigeration cycle system 64
14 Technical Data 66
15 Exploded View 69
16 Replacement Parts List 70
17 Exploded View 71
18 Replacement Parts List 72
19 Electronic Circuit Diagram 73
• High Efficiency
• Compact Design
• Comfort Environment
− Ionizer control for generate negative ion in discharge air
− Air filter with function to reduce dust and smoke
− Wider range of horizontal discharge air
− New Automatic air swing and manual adjusted by
remote control for horizontal airflow
• Auto Restart
− Random auto restart after power failure for safety restart
operation
• Removable and Washable Front Panel
• Remote Control Self-illuminating Button
• Catechin Air Purifying Filter
− Trap dust, tobacco smoke and tiny particles
− Prevent the growth of bacteria and viruses trapped
19.1. REMOTE CONTROL 79
19.2. PRINT PATTERN INDOOR UNIT PRINTED CIRCUIT
BOARD 80
19.3. PRINT PATTERN INDOOR UNIT PRINTED CIRCUIT
BOARD 81
19.4. PRINT PATTERN OUTDOOR UNIT PRINTED CIRCUIT
BOARD 82
• Triple Deodorizing Filter
− Absorb odours produced by wall paper, construction
material and living environment
• Quality Improvement
− Gas leakage protection
− Prevent compressor reverse cycle
− Inner protector
− Noise prevention during soft dry operation.
− Anti-dew Formation Control (Cooling & Soft Dry)
− Overload Protection Control (Heating)
− Outdoor Fan Control
− Compressor High Pressure Control
• Operation Improvement
− Quiet mode to provide quiet operation
− Powerful mode to reach the desired room temperature
quickly
• Long Installation Piping
− Long piping up to 25 meter
• 24-hour Timer Setting
1 Features
2
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

2 Functions
Remote Control
Operation OFF / ON
OFF / ON IRoom Temperature Setting
TEMP.
Operation Mode Selection
•AUTO Automatic Operation Mode
•HEAT Heating Operation Mode
•COOL Cooling Operation Mode
•DRY Soft Dry Operation Mode
MODE
TIME Time / Timer Setting
• Hours and minutes setting.
Clock Setting
• Current time setting.
Ionizer Operation OFF / ON
Indoor Fan Speed Selection
FAN SPEED
•FAN Low Fan Speed
•FAN Medium Fan Speed
•FAN High Fan Speed
•AUTO Automatic Fan Speed
FAN
Vertical 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.
CLOCK
AIR SWING
•Vertical Automatic Airflow
Direction Control and Manual
Airflow Direction Control (5
stages of adjustment).
•Horizontal Automatic Airflow
Direction Control and Manual
Airflow Direction Control (5
stages of adjustment).
Powerful Mode Operation OFF/ON
POWERFUL
Quiet Mode Operation OFF/ON
QUIET
Heating, Cooling, Soft Dry Operation.
• 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.
Self illuminating
button
3
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

Indoor Unit
Ionizer Control
•Ionizer control for generate negative ion
in discharge air.
Indoor Fan Speed Control
•High, Medium and Low.
•Automatic Fan Speed Mode
–Heating : Fan speed varies from Me
→SSLo in accordance with
indoor heat exchanger.
–Cooling : Fan rotates at Hi, Me and
Lo- speed. Deodorizing
control is available.
–Soft Dry : Fan rotates at Lo- speed.
Deodorizing control is
available.
•Automatic air swing and manual adjusted
by remote control for vertical and horizontal
airflow.
Airflow Direction Control
Automatic Operation Button
•Press for < 5s to operate Automatic
operation mode.
(Used when the remote control cannot be
used.)
•Press continuously for 5s or < 10s to
operate Test Run/Pump down. “Beep”
sound will be heard at the 5th second.
(Used when test running or servicing.)
•Press continuously for 10s and above to
omit or resume the remote control signal
receiving sound. “Beep, beep”sound will
be heard at the 10th second.
AUTO
OFF / ON
Operation Indication Lamps (LED)
• POWER (Green).......... Lights up in operation,
blinks in Automatic
Operation Mode judging
and Hot Start operation.
•
QUIET (Orange) ......... Lights up in Quiet Mode
Operation.
•
TIMER (Orange) ......... Lights up in Timer Setting.
• POWERFUL (Orange) ... Lights up in Powerful
Mode Operation.
•(Green) ............ Lights up in Ionizer
Mode Operation.
Operation Mode
•Heating, Cooling, Soft Dry and Automatic
Mode.
Powerful Operation
• Reaches the desired room temperature quickly.
Time Delay Safety Control
•Restarting is inhibited for appro. 3 minutes.
Quiet Operation
•To provide quiet operation.
7 Minutes Time Save Control
•Cooling Operation only.
Anti-Dew Formation Control
•Anti-Dew Formation Control for indoor unit
discharge area.
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)
Hot-Start Control
•At Heating Operation the indoor fan will
operate at SLo speed when indoor heat
exchanger temperature reaches 30°C.
Anti Cold Draft Control
•The indoor fan operates at Lo
–
(30 sec.)
after that SSLo when the indoor heat
exchanger temperature is low.
(During Heating mode thermal off)
4
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

Outdoor Unit
•To protect compressor from reverse
rotation when there is a instantaneous
power failure.
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.
Overload Protector
•Inner protector.
Compressor Reverse Rotation
Protection Control
Outdoor Fan Operation Control
•6-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.
Deice Control
•To prevent frosting at outdoor heat
exchanger during Heating Operation.
4-Way Valve Control
•When the unit is switched to “OFF”
during Heating Operation, 4-way valve
stays at Heating position for 5 minutes.
5
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

3 Product Specifications
Unit CS-A18CKH CU-A18CKH
Power Source Phase, Voltage, Cycle Single, 220 - 240, 50 Hz
Cooling Capacity kW (BTU/h) 5.40 (18,400) - 5.40 (18,400)
Heating Capacity kW (BTU/h) 5.90 (20,100) - 6.00 (20,500)
Moisture Removal l/h (Pint/h) 2.9 (6.1)
Airflow Method OUTLET
INTAKE
SIDE VIEW TOP VIEW
Air Volume Indoor Air (Lo) m3/min (cfm) Cooling; 13.1 (460) - 13.1 (460)
Heating; 14.0 (500) - 14.0 (500)
28.6 (1,010) - 32.4 (1,140)
Indoor Air (Me) m3/min (cfm) Cooling; 14.6 (520) - 14.6 (520)
Heating; 14.6 (520) - 14.6 (520)
—
Indoor Air (Hi) m3/min (cfm) Cooling; 15.4 (544) - 15.4 (544)
Heating; 15.9 (561) - 15.9 (561)
50.7 (1,790) - 52.7 (1,860)
Indoor Air (SHi) m3/min (cfm) Cooling; 15.9 (560) - 15.9 (560) —
Noise Level dB (A) Cooling; High 43 - 43, Low 38 - 38
Heating; High 42 - 42, Low 38 - 38
Cooling; High 53 - 54
Heating; High 54 - 55
Electrical Data Input Power kW Cooling; 1.68 - 1.73
Heating; 1.63 - 1.70
Running Current ACooling; 7.8 - 7.5
Heating; 7.6 - 7.5
EER W/W (BTU/hW) Cooling; 3.21 - 3.12 (10.95 - 10.64)
COP W/W (BTU/hW) Heating; 3.62 - 3.53 (12.33 - 12.06)
Starting Current A47.0
Piping Connection Port
(Flare piping)
inch
inch
G ; Half Union 1/2”
L ; Half Union 1/4”
G ; 3-way valve 1/2”
L ; 3-way valve 1/4”
Pipe Size
(Flare piping)
inch
inch
G ; (gas side) 1/2”
L ; (liquid side) 1/4”
G ; (gas side) 1/2”
L ; (liquid side) 1/4”
Drain
Hose
Inner diameter mm 12 —
Length mm 650 —
Power Cord Length m1.9 —
Number of core-wire 3 (1.5 mm2)—
Dimensions Height inch (mm) 10 - 13/16 (275) 29 - 17/32 (750)
Width inch (mm) 39 - 9/32 (998) 34 - 7/16 (875)
Depth inch (mm) 8 - 9/32 (210) 13 - 19/32 (345)
Net Weight lb (kg) 24 (11.0) 132 (60.0)
Compressor Type —Rotary (1 cylinder)
rolling piston type
Motor Type —Induction (2-poles)
Rated Output kW —1.5
Air Circulation Type Cross-flow Fan Propeller Fan
Material ASHT-18 PP
Motor Type Transistor (8-poles) Induction (6-poles)
Input W44.8 - 53.5 135.7 - 151.2
Rated Output W30 80
Fan Speed Low rpm Cooling; 1,160 - 1,160
Heating; 1,240 - 1,240
460 - 520
Medium rpm Cooling; 1,290 - 1,290
Heating; 1,290 - 1,290
—
High rpm Cooling; 1,360 - 1,360
Heating; 1,400 - 1,400
815 - 845
SuperHigh rpm Cooling; 1,400 - 1,400 —
6
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

Unit CS-A18CKH CU-A18CKH
Heat Exchanger Description Evaporator Condenser
Tube material Copper Copper
Fin material Aluminium (Pre Coat) Aluminium
Fin Type Slit Fin Corrugated Fin
Row / Stage (Plate fin configuration, forced draft)
2×15 2×28
FPI 21 16
Size (W × H × L) mm 810 × 315 × 25.4 833.2
867.8
× 711.2 × 44
Refrigerant Control Device —Capillary Tube
Refrigeration Oil (cm3) — SUNISO 4GDID or ATMOS M60
(700)
Refrigerant (R-22) g (oz) —1,710 (60.4)
Thermostat Electronic Control Electronic Control
Protection Device —Inner Protector
Capillary Tube Length mm —Cooling; 970, Heating; 820
Flow Rate l/min —Cooling; 11.0, Heating; 27.0
Inner Diameter mm —Cooling; 1.6, Heating; 2.2
Air Filter Material
Style
P.P.
Honeycomb
—
Capacity Control Capillary Tube
Compressor Capacitor µF, VAC —45 µF, 400VAC
Fan Motor Capacitor µF, VAC —3.5 µF, 440VAC
Note:
• Specifications are subject to change without notice for further improvement.
7
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

Unit CS-A24CKH CU-A24CKH
Power Source Phase, Voltage, Cycle Single, 220 - 240, 50 Hz
Cooling Capacity kW (BTU/h) 7.03 - 7.03 (24,000 - 24,000)
Heating Capacity kW (BTU/h) 7.80 - 7.80 (26,600 - 26,600)
Moisture Removal l/h (Pint/h) 4.0 (8.5)
Airflow Method OUTLET
INTAKE
SIDE VIEW TOP VIEW
Air Volume Indoor Air (Lo) m3/min (cfm) Cooling; 13.5 (480) - 13.5 (480)
Heating; 14.6 (520) - 14.6 (520)
28.1 (990) - 31.7 (1,120)
Indoor Air (Me) m3/min (cfm) Cooling; 15.3 (540) - 15.3 (540)
Heating; 15.3 (540) - 15.3 (540)
—
Indoor Air (Hi) m3/min (cfm) Cooling; 16.4 (580) - 16.4 (580)
Heating; 17.4 (610) - 17.4 (610)
49.7 (1,750) - 51.7 (1,830)
Indoor Air (SHi) m3/min (cfm) Cooling; 17.4 (610) - 17.4 (610) —
Noise Level dB (A) Cooling; High 47 - 47, Low 41 - 41
Heating; High 46 - 46, Low 41 - 41
Cooling; High 53 - 54
Heating; High 54 - 55
Electrical Data Input Power kW Cooling; 2.54 - 2.58
Heating; 2.53 - 2.56
Running Current ACooling; 12.3 - 12.2
Heating; 12.2 - 12.1
EER W/W (BTU/hW) Cooling; 2.77 - 2.72 (9.45 - 9.30)
COP W/W (BTU/hW) Heating; 3.08 - 3.05 (10.51 - 10.39)
Starting Current A67.0
Piping Connection Port
(Flare piping)
inch
inch
G ; Half Union 5/8”
L ; Half Union 1/4”
G ; 3-way valve 5/8”
L ; 3-way valve 1/4”
Pipe Size
(Flare piping)
inch
inch
G ; (gas side) 5/8”
L ; (liquid side) 1/4”
G ; (gas side) 5/8”
L ; (liquid side) 1/4”
Drain
Hose
Inner diameter mm 12 —
Length mm 650 —
Power Cord Length m1.9 —
Number of core-wire 3 (2.5 mm2)—
Dimensions Height inch (mm) 10 - 13/16 (275) 29 - 17/32 (750)
Width inch (mm) 39 - 9/32 (998) 34 - 7/16 (875)
Depth inch (mm) 8 - 9/32 (210) 13 - 19/32 (345)
Net Weight lb (kg) 26 (12.0) 139 (63.0)
Compressor Type —Rotary (1 cylinder) rolling piston
type
Motor Type —Induction (2-poles)
Rated Output kW —2.0
Air Circulation Type Cross-flow Fan Propeller Fan
Material ASHT-18 PP
Motor Type Transistor (8-poles) Induction (6-poles)
Input W44.8 - 53.5 171.3 - 190.0
Rated Output W30 108
Fan Speed Low rpm Cooling; 1,260 - 1,260
Heating; 1,360 - 1,360
460 - 520
Medium rpm Cooling; 1,430 - 1,430
Heating; 1,430 - 1,430
—
High rpm Cooling; 1,530 - 1,530
Heating; 1,610 - 1,610
815 - 845
SuperHigh rpm Cooling; 1,610 - 1,610 —
8
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

Unit CS-A24CKH CU-A24CKH
Heat Exchanger Description Evaporator Condenser
Tube material Copper Copper
Fin material Aluminium (Pre Coat) Aluminium
Fin Type Slit Fin Corrugated Fin
Row / Stage (Plate fin configuration, forced draft)
2×15 2×28
FPI 21 18
Size (W ×H×L) mm 810 ×315 ×25.4 833.2
867.8
×711.2 ×44.0
Refrigerant Control Device —Capillary Tube
Refrigeration Oil (cm3)—SUNISO 4GDID or ATMOS M60
(1,130)
Refrigerant (R-22) g (oz) —2,050 (72.4)
Thermostat Electronic Control Electronic Control
Protection Device —Inner Protector
Capillary Tube Length mm —Cooling; 730, Heating; 340
Flow Rate l/min —Cooling; 12.5, Heating; 21.0
Inner Diameter mm —Cooling; 1.6 Heating; 2.0
Air Filter Material
Style
P.P.
Honeycomb
—
Capacity Control Capillary Tube
Compressor Capacitor µF, VAC —45 µF, 400VAC
Fan Motor Capacitor µF, VAC —3.5 µF, 440VAC
Note:
• Specifications are subject to change without notice for further improvement.
9
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

4 Dimensions
10
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

11
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

5 Refrigeration Cycle Diagram
12
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

6 Block Diagram
13
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

7 Wiring Diagram
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH
14

8 Operation Details
8.1. Indoor Fan Speed Control
• Auto Fan Speed Control
When set to Auto Fan Speed, the fan speed is adjusted between maximum and minimum setting as shown in the table.
• Manual Fan Speed Control
Basic fan speed adjustment (3 settings, from Lo to Hi) can be carried out by using the Fan Speed selection button at the remote
control.
Speed COOL, DRY Heat CS-A24CKH CS-A18CKH
SHi Hi 1610 1400
Hi 1530 1360
Me Me 1430 1290
Lo+ Lo 1360 1240
Lo 1260 1160
Lo- Lo- 1070 980
SLo SLo 830 760
SS Lo SS Lo 300 300
QSHi QHi 1510 1300
QHi 1430 1260
QMe QMe 1330 1190
QLo 1260 1140
QLo 1160 1060
15
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

Cooling in operation according to Remote Control setting.
Time Delay Safety Control (3 minutes)
7 minutes Time Save Control
Anti-Freezing Control
• If the temperature of the indoor heat exchanger falls
continuously 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 will restart again 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
Anti-Dew Formation Control
8.2. Cooling Mode Operation
• When the compressor is stopped by Remote Control, it restarts after 3 minutes when the 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 even if the room temperature is between the compressor
ON temperature and OFF temperature.
• 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.
• Purpose is to prevent dew formation on indoor unit air discharge area.
• When room temperature is constant (±1°C) the following conditions occur for 30 minutes continuously, anti-dew formation will
activate:
− Indoor intake air temperature is more than 24°C and less than 30°C.
− Remote Control setting temperature is less than 25°C.
− Compressor is on.
− Cooling operation mode.
− Indoor Fan motor operate at Low fan speed or QLo.
• This control is cancelled immediately when above condition is changed.
• Anti-Dew formation is control by:
1. Lo fan speed
Lo fan is changed to Lo+ fan
16
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

Automatic Fan Speed Mode
2. QLo fan speed (Transistor Motor)
3. QLo fan speed (Induction Motor)
When Automatic Fan Speed is selected at Remote Control during cooling operation.
• Fan speed rotates in the range of Hi to Me.
• Deodorizing Control.
17
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

Cooling Operation Time Diagram
Quiet Operation Control
(For Cooling Mode or cooling region of Soft Dry Mode)
• Purpose of this operation is to provide quite cooling operation compare to normal operation.
• When the Quiet Mode is set at the remote control, Quiet Mode LED illuminates, the sound level will be automatically decreased
3 dB, against the present sound level operation.
• Quiet setting of fan speed rpm refer to Indoor Fan Speed Control.
• Dew formation become severe at Quiet Lo cool, therefore:
i) For Transistor Motor
Quiet Lo Cool is operated only 1h 30 minute (1h QLo, 30 min QLo+100). After that, it goes back to QLo+180 rpm. (However
quiet LED remains on).
ii) For Induction Motor
Quiet Lo Cool is operated only 1h 30 minute (1h QLo, 30 min QLo+80). After that, it goes back to QLo+170 rpm. (However quiet
LED remains on).
18
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

• Manual Fan Speed:-
− RPM control during Lo cool
− RPM control during Hi & Me cool
• Auto Fan Speed:-
• Quiet Mode Operation will stop if:-
− Quiet mode button is pressed again.
− Stopped by ON/OFF switch.
− Timer OFF activates.
− Powerful mode button is pressed.
19
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH

Time Delay Safety Control
Anti-Freezing Control
Compressor Reverse Rotation Protection Control
Anti-Dew Formation Control
Automatic Fan Speed Mode
8.3. 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 at Lo- speed.
• Once room temperature reaches below Soft Dry OFF temperature. Indoor Fan, Compressor and Outdoor Fan stop for 6
minutes.
• Once the compressor stops, it will not start for 3 minutes during Cooling 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 Anti-Dew Formation Control for Cooling Mode operation.
When Automatic Fan Speed is selected at Remote Control during Soft Dry operation.
• Fan speed off and on at Lo- speed.
• Deodorizing Control.
20
CS-A18CKH CU-A18CKH / CS-A24CKH CU-A24CKH