Panasonic Cs A9ekh Cu A9ekh Cs A12ekh Cu A12ekh Repair Manual

							1
Order No. MAC0601006C3
Air Conditioner
CS-A9EKH CU-A9EKH
CS-A12EKH CU-A12EKH
TABLE OF CONTENTS
PA G E PA G E
1 Safety Precautions-----------------------------------------------3
2 Specifications------------------------------------------------------5
2.1. CS-A9EKH CU-A9EKH -----------------------------------5
2.2. CS-A12EKH CU-A12EKH ------------------------------- 7
3Features--------------------------------------------------------------9
4 Location of Controls and Components------------------10
4.1. Product Overview ---------------------------------------- 10
5 Dimensions-------------------------------------------------------11
5.1. Indoor Unit & Remote Control ------------------------ 11
5.2. Outdoor Unit ----------------------------------------------- 12
6 Refrigeration Cycle Diagram--------------------------------13
7 Block Diagram---------------------------------------------------14
7.1. CS-A9EKH CU-A9EKH --------------------------------- 14
7.2. CS-A12EKH CU-A12EKH ----------------------------- 15
8 Wiring Connection Diagram---------------------------------16
8.1. CS-A9EKH CU-A9EKH --------------------------------- 16
8.2. CS-A12EKH CU-A12EKH ----------------------------- 17
9 Printed Circuit Board------------------------------------------18
9.1. Indoor Unit ------------------------------------------------- 18
9.2. Indicator ---------------------------------------------------- 20
10 Installation Instruction----------------------------------------2110.1. Select The Best Location ------------------------------ 21
10.2. Indoor Unit ------------------------------------------------- 22
10.3. Outdoor Unit ---------------------------------------------- 24
11 Operation and Control----------------------------------------27
11.1. Heating Operation --------------------------------------- 27
11.2. Cooling Operation --------------------------------------- 28
11.3. Soft Dry Operation--------------------------------------- 29
11.4. Automatic Operation ------------------------------------ 30
11.5. Operation Control ---------------------------------------- 31
11.6. Indoor Fan Speed Control ----------------------------- 38
11.7. Outdoor Fan Speed Control --------------------------- 40
11.8. Vertical Airflow Direction Control -------------------- 40
11.9. Horizontal Airflow Direction Control ----------------- 41
11.10. Powerful Operation -------------------------------------- 41
11.11. Quiet Operation ------------------------------------------ 43
11.12. Timer Control --------------------------------------------- 45
11.13. Random Auto Restart Control ------------------------ 45
11.14. Remote Control Signal Receiving Sound---------- 45
12 Service Mode-----------------------------------------------------46
12.1. Auto OFF/ON Button ----------------------------------- 46
12.2. Remote Control Button --------------------------------- 46 
						

							2 12.3. Test Mode Timer Table---------------------------------- 47
13 Troubleshooting Guide----------------------------------------48
13.1. Refrigeration Cycle System --------------------------- 48
13.2. Relationship Between The Condition of The
Air Conditioner and Pressure and Electric
Current ------------------------------------------------------ 49
13.3. Diagnosis Methods Of A Malfunction Of A
Compressor And 4-way Valve ------------------------ 49
14 Disassembly and Assembly Instructions---------------50
14.1. Indoor Electronic Controllers Removal
Procedures------------------------------------------------- 50
14.2. Indoor Fan Motor and Cross Flow Fan
Removal Procedures ------------------------------------ 52
15 Technical Data----------------------------------------------------54
15.1. Thermostat Characteristics ---------------------------- 54
15.2. Operation Characteristics ------------------------------ 55
16 Exploded View and Replacement Parts List-----------63
16.1. Indoor Unit ------------------------------------------------- 63
16.2. Outdoor Unit ----------------------------------------------- 65 
						

							3
1 Safety Precautions
• Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing.
• Electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the power plug and
main circuit for the model installed.
• The caution items stated here must be followed because these important contents are related to safety. The meaning of each
indication used is as below. Incorrect installation or servicing due to ignoring of the instruction will cause harm or damage, and
the seriousness is classified by the following indications..
• The items to be followed are classified by the symbols:
• Carry out test running to confirm that no abnormality occurs after the servicing. Then, explain to user the operation, care and
maintenance as stated in instructions. Please remind the customer to keep the operating instructions for future reference.
This indication shows the possibility of causing death or serious injury.
This indication shows the possibility of causing injury or damage to properties.
This symbol denotes item that is PROHIBITED from doing.
1. Engage dealer or specialist for installation and servicing. If installation or servicing done by the user is defective, it will cause water
leakage, electrical shock or fire.
2. Install according to this installation instruction strictly. If installation is defective, it will cause water leakage, electrical shock or fire. 
3. Use the attached accessories parts and specified parts for installation and servicing. Otherwise, it will cause the set to fall, water leak-
age, fire or electrical shock.
4. Install at a strong and firm location which is able to withstand the set’s weight. If the strength is not enough or installation is not prop-
erly done, the set will drop and cause injury.
5. For electrical work, follow the local national wiring standard, regulation and the installation instruction. An independent circuit and sin-
gle outlet must be used. If electrical circuit capacity is not enough or defect found in electrical work, it will cause electrical shock or
fire.
6. Use the specified cable and connect tightly for indoor/outdoor connection. Connect tightly and clamp the cable so that no external
force will be acted on the terminal. If connection or fixing is not perfect, it will cause heat-up or fire at the connection.
7. Wire routing must be properly arranged so that control board cover is fixed properly. If control board cover is not fixed perfectly, it will
cause heat-up or fire at the connection point of terminal, fire or electrical shock.
8. When connecting the piping, do not allow air or any substances other than the specified refrigerant to enter the refrigeration cycle.
Otherwise, this may lower the capacity, cause abnormally high pressure in the refrigeration cycle, and possibly result in explosion and
injury.
9. Thickness of copper pipes used must be more than 0.8 mm. Never use copper pipes thinner than 0.8 mm.
10. It is desirable that the amount of residual oil is less than 40 mg/10m.
11. Do not modify the length of the power supply cord or use of the extension cord, and do not share the single outlet with other electrical
appliances. Otherwise, it will cause fire or electrical shock.
1. The equipment must be earthed. It may cause electrical shock if grounding is not perfect.
2. Do not install the unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding of the
unit, it may cause fire.
3. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage
the furniture.
4. Pb free solder has a higher melting point than standard solder; typically the melting point is 50 - 70°F (30 - 40°C) higher. Please use
a high temperature solder iron. In case of the soldering iron with temperature control, please set it to 700 ± 20°F (370 ± 10°C).
Pb free solder will tend to splash when heated too high (about 1100°F / 600°C). 
						

							4 AT T E N T I O N
1. Selection of the installation location. Select an installation location which is rigid and strong enough to support or hold the unit, and select a
location for easy maintenance.
2. Power supply connection to the conditioner. Connect the power supply cord of the air conditioner to the mains using one of the following
methods.
Power supply point shall be the place where there is ease for ease for access for the power disconnection in case of emergency.
In some countries, permanent connection of this room air conditioner to the power supply is prohibited.
1. Power supply connection to the receptacle using a power plug. Use an approved power plug with earth pin for the connection to the
socket.
2. Power supply connection to a circuit breaker for the permanent connection. Use an approved circuit breaker for the permanent connec-
tion. It must be a double pole switch with a minimum 3.5 mm contact gap.
3. Do not release refrigerant during piping work for installation, servicing, reinstallation and during repairing a refrigeration parts. Take care of
the liquid refrigerant, it may cause frostbite.
4. Installation work. It may need two people to carry out the installation work.
5. Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc.. 
						

							5
2 Specifications
2.1. CS-A9EKH CU-A9EKH
Unit Indoor unit Outdoor unit
Power Source (Phase, Voltage, Cycle) ø, V, Hz Single, 220 - 240, 50
Cooling Capacity kW (BTU/h) 2.65 - 2.65 (9,040 - 9,040)
Heating Capacity kW (BTU/h) 2.80 - 2.85 (9,550 - 9,720)
Moisture Removal l/h (Pint/h) 1.6 (3.4)
Airflow Method OUTLET SIDE VIEW TOP VIEW
INTAKE
Air Volume Lo
m
3/min (cfm)Cooling; 6.4 (228) - 6.4 (228)    
Heating; 6.7 (237) - 6.7 (237)—
Me
m
3/min (cfm)Cooling; 7.8 (274) - 7.8 (274)    
Heating; 7.5 (266) - 7.5 (266)—
Hi
m
3/min (cfm)Cooling; 9.4 (330) - 9.4 (330)    
Heating; 9.8 (350) - 9.8 (350)Cooling; 29.5 (1,040) - 30.0 (1,060)
SHi
m
3/min (cfm)Cooling; 10.1 (356) - 10.1 (356)    
Heating; ——
Noise Level dB (A) Cooling; High 36 - 36, Low 26 - 26
Heating; High 38 - 38, Low 28 - 28Cooling; High 48 - 49
Heating; High 48 - 49
Power level dB Cooling; High 49  - 49
Heating; High 51 - 51Cooling; High 63 - 64
Heating; High 64 - 65
Electrical Data Input Power kW Cooling; 0.83 - 0.86
Heating; 0.70 - 0.74
Running Current A Cooling; 3.9 - 3.8
Heating; 3.3 - 3.3
EER W/W (BTU/hW) Cooling; 3.19 - 3.08 (10.9 - 10.5)
COP - (BTU/hW) Heating; 4.00 - 3.85 (13.6 - 13.1)
Starting Current A 18.0
Piping Connection Port inch G ; Half Union 3/8” G ; 3-way valve 3/8”
(Flare piping) inch L ; Half Union 1/4” L ; 2-way valve 1/4”
Pipe Size inch G ; (Gas side) 3/8” G ; (Gas side) 3/8”
(Flare piping) inch L ; (Liquid side) 1/4” L ; (Liquid side) 1/4”
Drain Hose Inner diameter mm 16 —
Length mm 650 —
Power Cord Length m 1.9 —
Number of core-wire
3 (1.5 mm
2)—
Dimensions Height inch (mm) 11 - 1/32 (280) 20 - 3/32 (510)
Width inch (mm) 31 - 15/32 (799) 25 - 19/32 (650)
Depth inch (mm) 7 - 7/32 (183) 9 - 1/16 (230)
Net Weight lb (kg) 20 (9.0) 60 (27)
Compressor Description — Rotary (1 cylinder)
rolling piston type
Motor Type — Induction (2-poles)
Rated Output W — 750 
						

							6 Note:
• Specifications are subject to change without notice for further improvement.
Fan Motor Description Cross-flow Fan Propeller Fan
Material ASG32K1 PP Resin
Motor Type Induction (4-poles) Induction (6-poles)
Input W 60.5 - 66.0 66 - 74.8
Rated Output W 15 30
Fan Speed Low rpm Cooling; 830 - 830
Heating; 890 - 890—
Medium rpm Cooling; 1000 - 1000
Heating; 1000 - 1000—
High rpm Cooling; 1210 - 1210
Heating; 1300 - 1300800 - 830
SuperHigh rpm Cooling; 1300 - 1300
Heating; ——
Heat Exchanger Description Evaporator Condenser
Tube material Copper Copper
Fin material Aluminium (Pre Coat) Aluminium (Blue Coat)
Fin Type Slit Fin Corrugated Fin
Row / Stage (Plate fin configuration, forced draft)
2 × 15 1 × 18
FPI 19 17
Size (W × H × L) mm 610 × 315 × 25.4 594.5 × 482.6 × 22
Refrigerant Control Device — Capillary Tube
Refrigerations Oil
(cm
3)— ATMOS M60 OR SUNISO 4GDID
Refrigerant (R-22) g (oz) — 670 (23.7)
Thermostat——
Protection Device — Overload Protector
Capillary Tube Length mm — Cooling; 705, Heating; 705
Flow Rate I/min — Cooling;10.5, Heating;10.5
Inner Diameter mm — Cooling; 1.5, Heating; 1.5
Air Filter Material P.P. —
Style Honeycomb
Capacity ControlCapillary Tube
Compressor CapacitorμF, VAC — 30 μF, 370VAC
Fan Motor CapacitorμF, VAC 1.5 μF, 440VAC 2.0 μF, 440VAC Unit Indoor unit Outdoor unit 
						

							7
2.2. CS-A12EKH CU-A12EKH
Unit Indoor unit Outdoor unit
Power Source (Phase, Voltage, Cycle) ø, V, Hz Single, 220 - 240, 50
Cooling Capacity kW (BTU/h) 3.52 - 3.57 (12,000 - 12,200)
Heating Capacity kW (BTU/h) 3.90 - 4.00 (13,300 - 13,640)
Moisture Removal l/h (Pint/h) 2.1 (4.4)
Airflow Method OUTLET SIDE VIEW TOP VIEW
INTAKE
Air Volume Lo
m
3/min (cfm)Cooling; 6.1 (215) - 6.1 (215)
Heating; 6.5 (230) - 6.5 (230)—
Me
m
3/min (cfm)Cooling; 8.5 (301) - 8.5 (301)
Heating; 8.5 (300) - 8.5 (300)—
Hi
m
3/min (cfm)Cooling; 9.9 (330) - 9.9 (330)
Heating;10.0 (350) - 10.0 (350)Cooling; 32.5 (1,150) - 33.5 (1,180)
SHi
m
3/min (cfm)Cooling; 10.1 (355) - 10.1 (355)
Heating; ——
Noise Level dB (A) Cooling; High 39 - 39, Low 29 - 29
Heating; High 40 - 40, Low 29 - 29Cooling; High 48 - 49
Heating; High 48 - 49
Power level dB Cooling; High 52 - 52
Heating; High 53 - 53Cooling; High 63 - 64
Heating; High 64 - 65
Electrical Data Input Power kW Cooling; 1.08 - 1.15
Heating; 1.07 - 1.13
Running Current A Cooling; 5.1 - 5.0
Heating; 5.1 - 5.0
EER W/W (BTU/hW) Cooling; 3.26 - 3.10 (11.1 - 10.6)
COP W/W (BTU/hW) Heating; 3.64 - 3.54 (12.4 - 12.1)
Starting Current A 27.0
Piping Connection Port inch G ; Half Union 1/2” G ; 3-way valve 1/2”
(Flare piping) inch L ; Half Union 1/4” L ; 2-way valve 1/4”
Pipe Size inch G ; (Gas side) 1/2” G ; (Gas side) 1/2”
(Flare piping) inch L ; (Liquid side) 1/4” L ; (Liquid side) 1/4”
Drain Hose Inner diameter mm 16 —
Length mm 650 —
Power Cord Length m 1.9 —
Number of core-wire
3 (1.5 mm
2)—
Dimensions Height inch (mm) 11 - 1/32 (280) 21 - 1/4 (540)
Width inch (mm) 31 - 15/32 (799) 30 - 23/32 (780)
Depth inch (mm) 7 - 7/32 (183) 11 - 3/8 (289)
Net Weight lb (kg) 20 (9.0) 82 (37)
Compressor Description — Rotary (1 cylinder)
rolling piston type
Motor Type — Induction (2-poles)
Rated Output W — 950 
						

							8 Note:
• Specifications are subject to change without notice for further improvement.
Fan Motor Description Cross-flow Fan Propeller Fan
Material ASG32K1 PP Resin
Motor Type Induction (4-poles) Induction (6-poles)
Input W 60.5 - 66.0 71.5 - 80.3
Rated Output W 15 31
Fan Speed Low rpm Cooling; 800 - 800
Heating; 860 - 860—
Medium rpm Cooling; 1,120 - 1,120
Heating; 1,120 - 1,120—
High rpm Cooling; 1300 - 1300
Heating; 1320 - 1320845 - 860
SuperHigh rpm Cooling; 1320 - 1320
Heating; ——
Heat Exchanger Description Evaporator Condenser
Tube material Copper Copper
Fin material Aluminium (Pre Coat) Aluminium (Blue Coat)
Fin Type Slit Fin Corrugated Fin
Row / Stage (Plate fin configuration, forced draft)
2 × 15 2 × 24
FPI 21 16
Size (W × H × L) mm 610 × 315 × 25.4 720 × 504 × 22
Refrigerant Control Device — Capillary Tube
Refrigerations Oil
(cm
3)— ATMOS M60 OR SUNISO 4GDID
Refrigerant (R-22) g (oz) — 1050 (37.1)
Thermostat——
Protection Device — —
Capillary Tube Length mm — Cooling; 430, Heating; 455
Flow Rate l/min — Cooling; 7.6, Heating; 13.6
Inner Diameter mm — Cooling; 1.2 Heating; 1.5
Air Filter Material
StyleP. P.
Honeycomb—
Capacity ControlCapillary Tube
Compressor CapacitorμF, VAC — 35 mF, 370VAC
Fan Motor CapacitorμF, VAC 1.5 mF, 440VAC 2.0 mF, 440VACUnit Indoor unit Outdoor unit 
						

							9
3Features
• High Efficiency
• Compact Design
• Wider range of horizontal discharge air
• Air Filter with function to reduce dust and smoke
• Automatic air swing and manual adjusted by Remote
Control for vertical airflow
•Long Installation Piping
-CS/CU-A9EK, long piping up to 10 meter
-CS/CU-A12EK, long piping up to 15 meter
• Supersonic Air Purifying Device with SUPER alleru-
buster
- Inactivate various harmful airborne elements including
allergens, viruses and bacteria
- Generated supersonic waves enhance the ability to col-
lect dust and dirt in the air
• Auto Refresh Deo
- Regenerated the deodorizing performance so it stays the
same as when it was first used
•Quality Improvement
-Random auto restart after power failure for safety restart
operation
- Gas leakage protection
- Prevent compressor reverse cycle
- Inner protector to protect Compressor
- Noise prevention during soft dry operation
-Blue Coated Condenser for high resistance to corrosion
• Operation Improvement
-Quiet mode to provide quiet operation
- Powerful mode to reach the desired room temperature
quickly
- 24-hour timer setting
• Serviceability Improvement
-Removable and washable front panel 
						

							10
4 Location of Controls and Components
4.1. Product Overview
4.1.1. Indoor Unit
4.1.2. Outdoor Unit
4.1.3. Remote Control