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Panasonic CS-A12PKD Service Manual

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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 products dealt with in this service information by anyone else could result in serious injury or death.
Indoor Unit
CS-A9PKD
CS-A12PKD
CS-A18PKD
CS-A24PKD
CS-A28PKD
WARNING
Order No: PAPAMY1301028CE
Outdoor Unit
CU-A9PKD
CU-A12PKD
CU-A18PKD
CU-A24PKD
CU-A28PKD
Destination
N.Africa
L.America
S.Africa
Middle East
© Panasonic Corporation 2012.

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Summary of Contents for Panasonic CS-A12PKD

  • Page 1 Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the products dealt with in this service information by anyone else could result in serious injury or death. © Panasonic Corporation 2012.

  • Page 2: Table Of Contents

    12. Installation Instruction........44 17. Disassembly and Assembly Instructions ..97 12.1 Select the Best Location......44 12.2 Indoor Unit ..........45 17.1 CS-A9PKD CS-A12PKD ......97 12.3 Outdoor Unit ..........49 17.2 CS-A18PKD CS-A24PKD CS-A28PKD 101 13. Operation Control..........52 18. Technical Data ..........105 13.1...

  • Page 3: Safety Precautions

    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. •...
  • Page 4 WARNING Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when refrigerant contacts with fire. Do not insert your fingers or other objects into the unit, high speed rotating fan may cause injury. Must not use other parts except original parts described in catalog and manual. Using of refrigerant other than the specified type may cause product damage, burst and injury etc.

  • Page 5: Specification

    2. Specification Indoor CS-A9PKD CS-A12PKD Model Outdoor CU-A9PKD CU-A12PKD Performance Test Condition NEW JIS NEW JIS Phase, Hz Single, 50 Single, 50 Power Supply 2.65 2.65 3.52 3.54 Capacity BTU/h 9040 9040 12000 12100 kcal/h 2280 2280 3030 3040 Running Current Input Power 1.08k...
  • Page 6 Indoor CS-A9PKD CS-A12PKD Model Outdoor CU-A9PKD CU-A12PKD Cooling: 6.4 (226) - 6.4 (226) Cooling: 7.1 (251) - 7.1 (251) /min (ft /min) Heating: 6.8 (240) - 6.8 (240) Heating: 7.5 (265) - 7.5 (265) Cooling: 7.1 (251) - 7.1 (251) Cooling: 7.8 (275) - 7.8 (275)
  • Page 7 Indoor CS-A18PKD CS-A24PKD Model Outdoor CU-A18PKD CU-A24PKD Performance Test Condition NEW JIS NEW JIS Phase, Hz Single, 50 Single, 50 Power Supply 5.30 5.30 7.03 7.03 Capacity BTU/h 18100 18100 24000 24000 kJ/h 19100 19100 25300 25300 Running Current 12.3 12.2 Input Power 1.72k...
  • Page 8 Indoor CS-A18PKD CS-A24PKD Model Outdoor CU-A18PKD CU-A24PKD Cooling: 12.0 (425) - 12.0 (425) Cooling: 13.5 (477 ) - 13.5 (477) /min (ft /min) Heating: 12.7 (447) - 12.7 (447) Heating: 14.2 (503) - 14.2 (503) Cooling: 13.2 (467) - 13.2 (467) Cooling: 14.7 (520) - 14.7 (520) /min (ft /min)
  • Page 9 Indoor CS-A28PKD Model Outdoor CU-A28PKD Performance Test Condition NEW JIS Phase, Hz Single, 50 Power Supply 8.00 8.00 Capacity BTU/h 27300 27300 kJ/h 28800 28800 Running Current 13.2 12.7 Input Power 2.86k 2.88k 2.80 2.78 Btu/hW 9.55 9.48 Power Factor dB-A 49 / 44 Indoor Noise (H / L)
  • Page 10 Indoor CS-A28PKD Model Outdoor CU-A28PKD Cooling: 15.0 (528) /min (ft /min) Heating: 15.8 (559) Cooling: 16.2 (571) /min (ft /min) Heating: 17.0 (602) Cooling: 17.8 (628) Indoor Airflow /min (ft /min) Heating: 17.7 (626) Cooling: 19.80 (699) /min (ft /min) Heating: 20.40 (720) /min (ft /min)

  • Page 11: Features

    3. Features • Air Purifying System with nanoe-G Deactivates and removes bacterial, viruses and mould. • Long Installation Piping CS/CU-A9PK, long piping up to 10 meters. CS/CU-A12PK, long piping up to 15 meters. CS/CU-A18PK, CS/CU-A24PK, long piping up to 25 meters. CS/CU-A28PK, long piping up to 30 meters.

  • Page 12: Location Of Controls And Components

    4. Location of Controls and Components Indoor Unit Outdoor Unit Remote Control...

  • Page 13: Dimensions

    5. Dimensions Indoor Unit 5.1.1 CS-A9PKD CS-A12PKD...
  • Page 14 5.1.2 CS-A18PKD CS-A24PKD CS-A28PKD...

  • Page 15: Outdoor Unit

    Outdoor Unit 5.2.1 CU-A9PKD 5.2.2 CU-A12PKD...
  • Page 16 5.2.3 CU-A18PKD...
  • Page 17 5.2.4 CU-A24PKD CU-A28PKD...

  • Page 18: Refrigeration Cycle Diagram

    6. Refrigeration Cycle Diagram CS-A9PKD CU-A9PKD CS-A12PKD CU-A12PKD...

  • Page 19: Cs-A18Pkd Cu-A18Pkd Cs-A24Pkd Cu-A24Pkd Cs-A28Pkd Cu-A28Pkd

    CS-A18PKD CU-A18PKD CS-A24PKD CU-A24PKD CS-A28PKD CU-A28PKD...

  • Page 20: Block Diagram

    7. Block Diagram CS-A9PKD CU-A9PKD...

  • Page 21: Cs-A12Pkd Cu-A12Pkd

    CS-A12PKD CU-A12PKD...

  • Page 22: Cs-A18Pkd Cu-A18Pkd Cs-A24Pkd Cu-A24Pkd

    CS-A18PKD CU-A18PKD CS-A24PKD CU-A24PKD...

  • Page 23: Cs-A28Pkd Cu-A28Pkd

    CS-A28PKD CU-A28PKD...

  • Page 24: Wiring Connection Diagram

    8. Wiring Connection Diagram CS-A9PKD CU-A9PKD Resistance of Indoor Fan Motor Windings Resistance of Compressor Windings MODEL CS-A9PKD MODEL CU-A9PKD CONNECTION CWA921447 CONNECTION 2PS156D3DA02 BLUE-YELLOW 336Ω 4.228Ω YELLOW-RED 306Ω 3.841Ω Note: Resistance at 25°C of ambient temperature. Note: Resistance at 20°C of ambient temperature. Resistance of Outdoor Fan Motor Windings MODEL CU-A9PKD...

  • Page 25: Cs-A12Pkd Cu-A12Pkd

    CS-A12PKD CU-A12PKD Resistance of Indoor Fan Motor Windings Resistance of Compressor Windings MODEL CS-A12PKD MODEL CU-A12PKD CONNECTION CWA921447 CONNECTION 2PS206D3DA06 BLUE-YELLOW 336Ω 3.252Ω YELLOW-RED 306Ω 4.313Ω Note: Resistance at 25°C of ambient temperature. Note: Resistance at 20°C of ambient temperature.

  • Page 26: Cs-A18Pkd Cu-A18Pkd Cs-A24Pkd Cu-A24Pkd

    CS-A18PKD CU-A18PKD CS-A24PKD CU-A24PKD Resistance of Outdoor Fan Motor Windings Resistance of Compressor Windings MODEL CU-A18PKD / CU-A24PKD MODEL CU-A18PKD CU-A24PKD CONNECTION CWA951385J CONNECTION 2JS318D3AA04 2JS438D3CC04 BLUE-YELLOW 93Ω 1.618Ω 1.121Ω YELLOW-ORANGE 124Ω 3.718Ω 2.535Ω YELLOW-RED 98Ω Note: Resistance at 20°C of ambient temperature. Note: Resistance at 25°C of ambient temperature.

  • Page 27: Cs-A28Pkd Cu-A28Pkd

    CS-A28PKD CU-A28PKD Resistance of Outdoor Fan Motor Windings Resistance of Compressor Windings MODEL CU-A28PKD MODEL CU-A28PKD CONNECTION CWA951294J CONNECTION 2JD514E3AA03 BLUE-YELLOW 102Ω 1.022Ω YELLOW-ORANGE 81Ω 2.142Ω YELLOW-RED 108Ω Note: Resistance at 20°C of ambient temperature. Note: Resistance at 25°C of ambient temperature.

  • Page 28: Electronic Circuit Diagram

    9. Electronic Circuit Diagram CS-A9PKD CU-A9PKD...

  • Page 29: Cs-A12Pkd Cu-A12Pkd

    CS-A12PKD CU-A12PKD...

  • Page 30: Cs-A18Pkd Cu-A18Pkd Cs-A24Pkd Cu-A24Pkd

    CS-A18PKD CU-A18PKD CS-A24PKD CU-A24PKD...

  • Page 31: Cs-A28Pkd Cu-A28Pkd

    CS-A28PKD CU-A28PKD...

  • Page 32: Printed Circuit Board

    10. Printed Circuit Board 10.1 Indoor Unit 10.1.1 Main Printed Circuit Board 10.1.1.1 CS-A9PKD CS-A12PKD...
  • Page 33 10.1.1.2 CS-A18PKD CS-A24PKD CS-A28PKD 10.1.2 Indicator & Receiver Printed Circuit Board 10.1.3 High Voltage Power Supply Printed Circuit Board...
  • Page 34 10.1.4 Comparator Printed Circuit Board 10.1.5 Human Activity Sensor Printed Circuit Board...

  • Page 35: Installation Instruction

    11. Installation Instruction 11.1 Select the Best Location 11.1.3 Indoor/Outdoor Unit Installation Diagram 11.1.1 Indoor Unit • Do not install the unit in excessive oil fume area such as kitchen, workshop and etc. • There should not be any heat source or steam near the unit.

  • Page 36: Indoor Unit

    11.2 Indoor Unit 11.2.1 How to Fix Installation Plate The mounting wall shall be strong and solid enough to prevent if from the vibration. Dimension Model ○ ○ ○ ○ ○ ○ A9***, A12 *** 490 mm 82 mm 439 mm 432 mm 93 mm 145 mm...
  • Page 37 11.2.3 Indoor Unit Installation 11.2.3.1 For the right rear piping 11.2.3.2 For the right and right bottom piping 11.2.3.3 For the embedded piping (This can be used for left rear piping and bottom piping also.)
  • Page 38 11.2.4 Connect the Cable to the Indoor Unit The power supply cord, indoor and outdoor unit connection cable can be connected without removing the front grille. Install the indoor unit on the installing holder that mounted on the wall. Open the front panel and grille door by loosening the screw. Cable connection to the power supply through Isolating Devices (Disconnecting means).
  • Page 39 Remove the tapes and connect the power supply cord and connection cable between indoor unit and outdoor unit according to the diagram below. Secure the power supply cord and connection cable onto the control board with the holder. Close grille door by tighten with screw and close the front panel. Note: •...
  • Page 40 11.2.5 Wire Stripping And Connecting Requirement...

  • Page 41: Outdoor Unit

    11.3 Outdoor Unit 11.3.1 Install the Outdoor Unit • After selecting the best location, start installation to Indoor/Outdoor Unit Installation Diagram. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm). When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or nails.
  • Page 42 11.3.3 Evacuation of the Equipment Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve. Be sure to connect the end of the charging hose with the push pin to the service port. Connect the center hose of the charging set to a vacuum pump.
  • Page 43 11.3.4 Connect the cable to the Outdoor Unit Remove the control board cover from the unit by loosening the screw. Connection cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 5 × 1.5mm (1.0 ~ 1.5HP) or 5 × 2.5mm (2.0 ~ 2.5HP) flexible cord, type designation 60245 IEC 57 or heavier cord.

  • Page 44: Installation Instruction

    12. Installation Instruction (CS-A28PKD CU-A28PKD only) 12.1 Select the Best Location 12.1.3 Indoor/Outdoor Unit Installation Diagram 12.1.1 Indoor Unit • Do not install the unit in excessive oil fume area such as kitchen, workshop and etc. • There should not be any heat source or steam near the unit.

  • Page 45: Indoor Unit

    12.2 Indoor Unit 12.2.1 How to Fix Installation Plate The mounting wall shall be strong and solid enough to prevent if from the vibration. Dimension Model ○ ○ ○ ○ ○ ○ A28*** 590 mm 82 mm 539 mm 532 mm 169 mm 219 mm The center of installation plate should be at more than...
  • Page 46 12.2.3 Indoor Unit Installation 12.2.3.1 For the right rear piping 12.2.3.2 For the right and right bottom piping 12.2.3.3 For the embedded piping (This can be used for left rear piping and bottom piping also.)
  • Page 47 12.2.4 Connect the Cable to the Indoor Unit The inside and outside connection cable can be connected without removing the front grille. Connection cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 6 × 1.5 mm flexible cord, type designation 60245 IEC 57 or heavier cord.
  • Page 48 12.2.5 Wire Stripping And Connecting Requirement...

  • Page 49: Outdoor Unit

    12.3 Outdoor Unit 12.3.1 Install the Outdoor Unit • After selecting the best location, start installation to Indoor/Outdoor Unit Installation Diagram. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm). When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or nails.
  • Page 50 12.3.3 Evacuation of the Equipment Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve. Be sure to connect the end of the charging hose with the push pin to the service port. Connect the center hose of the charging set to a vacuum pump.
  • Page 51 12.3.4 Connect the cable to the Outdoor Unit Remove the control board cover from the unit by loosening the screw. Cable connection to the power supply through Isolating Devices (Disconnecting means). Connect the approved polychloroprene sheathed power supply cord 3 × 4.0 mm type designation 60245 IEC 57 or heavier cord to the terminal board, and connect the others end of the cable to Isolating Devices (Disconnecting means).

  • Page 52: Operation Control

    13. Operation Control 13.1 Heating Operation • Heating operation can be set using remote control. • This operation is applied to warm the room temperature reaches the setting temperature set on the remote control. • The remote control setting temperature, which takes the reading of intake air temperature sensor, can be adjusted from 16°C to 30°C.
  • Page 53 13.1.1 Heating Operation Time Diagram (For CS-A9PK CU-A9PK and CS-A12PK CU-A12PK) 13.1.2 Heating Operation Time Diagram (For CS-A18PK CU-A18PK, CS-A24PK CU-A24PK and CS-A28PK CU-A28PK)

  • Page 54: Cooling Operation

    13.2 Cooling Operation • Cooling operation can be set using remote control. • This operation is applied to cool down the room temperature to the setting temperature set on the remote control. • The remote control setting temperature, which takes the reading of intake air temperature sensor, can be adjusted from 16°C to 30°C.
  • Page 55 13.2.2 Cooling Operation Time Diagram (For CS-A18PK CU-A18PK, CS-A24PK CU-A24PK and CS-A28PK CU-A28PK)

  • Page 56: Soft Dry Operation

    13.3 Soft Dry Operation • Soft Dry operation can be set using remote control. • Soft Dry operation is applied to dehumidify and to perform a gentle cooling to the room. • This operation starts when the intake air temperature sensor reaches the setting temperature on the remote control.
  • Page 57 13.3.2 Soft Dry Operation Time Diagram (For CS-A18PK CU-A18PK, CS-A24PK CU-A24PK and CS-A28PK CU-A28PK)

  • Page 58: Automatic Operation

    13.4 Automatic Operation • Automatic operation can be set using remote control. • This operation starts to operate with indoor fan at SLo speed for 25 seconds to judge the intake air temperature. • After judged the temperature, the operation mode is determined by referring to the below standard. Cooling Operation ↑...

  • Page 59: Indoor Fan Speed Control

    JX03 at indoor unit’s printed circuit board. 13.5 Indoor Fan Speed Control • Indoor fan speed can be set using remote control. 13.5.1 Fan Speed Rotation Chart Fan Speed (rpm) CS-A9PKD CS-A12PKD 1060 1100 1020 1080 SSLo QSHi 1030...
  • Page 60 When set to Auto Fan Speed, the fan speed is adjusted between maximum and minimum setting as shown in the table. Fan speed rotates in the range of Hi, Me and Lo-. Deodorizing Control will be activated. For CS-A9PKD and CS-A12PKD Speed Mode SSLo Stop...
  • Page 61 For CS-A18PKD, CS-A24PKD and CS-A28PKD Speed Mode SSLo Stop Manual Normal Auto Manual Powerful Auto Manual Normal Auto Manual Normal Auto Manual Powerful Auto Auto Mode Judgment Manual Quiet Auto Manual Quiet Auto Manual Quiet -170 Auto -170...
  • Page 62 • Auto Fan Speed during cooling operation: Indoor fan will rotate alternately between off and on as shown in below diagram. At the beginning of each compressor starts operation, indoor fan speed increases gradually for deodorizing purpose. For the first time the compressor operates, indoor fan will be switched to Hi fan speed from Lo- after 70 seconds from the start of compressor.

  • Page 63: Outdoor Fan Speed Control

    • Auto Fan Speed during Heating operation. Indoor fan will rotate in the range of SLo → Me according to the heat exchanger temperature. (For A18PKD, A24PKD and A28PKD) (For A9PKD and A12PKD) 13.5.3 Manual Fan Speed Control • Manual fan speed adjustment can be carried out by using the Fan Speed selection button at the remote control. •...

  • Page 64: Vertical Airflow Direction Control

    13.7 Vertical Airflow Direction Control 13.7.1 Auto Control (Cooling and Soft Dry Operation Condition) • When the vertical airflow direction is set to Auto using the remote control, the louver swings up and down as shown in the diagram. • When stops operation using the remote control, the discharge vent is reset and stops at the closing position.
  • Page 65 For CS-A18PK, CS-A24PK and CS-A28PK Horizontal Upper limit/5° Closing position 40° / 140° Lower limit for heating mode/45° 13.7.2 Manual Control • When the vertical airflow direction is set to Manual using the remote control, the automatic airflow is released and the airflow direction louver move up and down in the range shown in the diagram.

  • Page 66: Horizontal Airflow Direction Control

    For CS-A18PK, CS-A24PK and CS-A28PK Horizontal Upper limit for heating mode 5° Closing position 15° / 140° 25° 35° 45° Lower limit for heating mode 13.8 Horizontal Airflow Direction Control 13.8.1 Auto Control • When the horizontal airflow direction is set to Auto using the remote control, the vanes swings left and right as shown in the diagram.

  • Page 67: Powerful Operation

    13.8.2 Manual Control • When the horizontal airflow direction is set to Manual using the remote control, the automatic airflow is released and the airflow direction vane move left and right in the range shown in the diagram. • The louver can be adjusted by pressing the button to the desired vane position. •...
  • Page 68 (Heating Operation condition) • When Powerful operation is set, the setting temperature will be automatically increased 3°C against the present setting temperature (Higher temperature: 30°C). • The Fan Speed will shift as shown below: • Vertical Airflow Direction:- o In “Manual” setting, the vane will automatically shift down 5° lower than previous setting. o In “Auto”...

  • Page 69: Quiet Operation

    13.10 Quiet Operation (For Cooling Operation or cooling region of Soft Dry Operation) • To provide quiet cooling operation condition. • Once the Quiet Operation is set at the remote control, the Quiet LED brightness will be dimmed. The sound level will reduce around 2dB(A) for Lo fan speed or 3dB(A) for Hi/Me fan speed against the present operation sound level.
  • Page 70 (Heating Operation condition) • When the Quiet Mode is set at the remote control, Quiet Mode LED illuminates. The sound level will reduce either around 2 dB (Lo) or 3 dB (Hi, Me), against the present sound level operation. • Quiet setting of fan speed rpm refer to Indoor Fan Speed Control.

  • Page 71: Timer Control

    13.11 Timer Control 13.11.1 ON Timer • When the ON Timer is set by using the remote control, the unit will start to operate slightly before the set time, so that the room will reach nearly to the set temperature by the set time. •...

  • Page 72: Nanoe-G Operation

    13.14 nanoe-G operation • This operation provides clean air by producing great amount of negative ions and distribute through the discharge airflow to capture or deactivate molds, bacteria or viruses. • nanoe-G operation start condition During unit running at any operation mode, if nanoe-G operation is activated, combination operation (operation mode + nanoe-G operation) starts.
  • Page 73 • nanoe-G check mode To enable nanoe-G check mode, during nanoe-G operation ON: If there is abnormal discharge, nanoe-G indicator blinks immediately. • Error detection control When nanoe-G indicator blinks, it indicates error listed below: Nanoe-G connector at main PCB open Judgment method •...

  • Page 74: In-Filter Deactivation Operation

    Error reset method • Press OFF/ON button to OFF the operation. • Press AUTO OFF/ON button at indoor unit to OFF the operation. • OFF Timer activates. • Power supply reset. nanoe-G breakdown error Judgment method • Hi-feedback voltage (at microcontroller) supplied to the nanoe-G system when nanoe-G operation is OFF;...

  • Page 75: Auto Comfort And Econavi Operation

    13.16 AUTO COMFORT and ECONAVI Operation • AUTO COMFORT start condition: When AUTO COMFORT button is pressed. • AUTO COMFORT stop conditions: When AUTO COMFORT button is pressed again. When unit is OFF by OFF/ON button. When unit is OFF when OFF TIMER activates. When unit is OFF by AUTO OFF/ON button at indoor unit.
  • Page 76 13.16.1.1 Signal Detection • Human Activity sensor will turns on according to infrared sensors signal detection. Signal detection Possible detected human Human Activity Indicator position area Sensor 1 Sensor 2 Left Center Right ■ ■ □ □ ■ ■ ■ □...
  • Page 77 13.16.1.7 Setting Position Judgment • According to installation position when there is only one activity area detected, the horizontal airflow direction louver position is fixed according to chart below: Horizontal airflow direction louver position Target area Left installation Center installation Right installation •...
  • Page 78 13.16.1.9 ECONAVI Demo Mode • To enable ECO DEMO mode, during unit is OFF (power standby): • To disable ECO Demo MODE: Transmit ECO Demo signal again. • Operation details Infrared sensor Human Activity Sensor Vane position Fan speed Sensor 1 Sensor 2 Left Center...
  • Page 79 13.16.1.10 Human Activity Sensor Abnormality • Abnormality detection: Connector disconnection / Wire cut abnormality Sensor judge Hi level continuously for 25 seconds Circuit abnormality 70 seconds after power ON, if human activity sensor judge Lo level continuously for 25 seconds •...
  • Page 80 13.16.2 Sunlight Sensor • During ECONAVI operation, the sunlight sensor detects sunlight intensity coming through windows and differentiates between sunny and cloudy or night to further optimize energy saving by adjusting the temperature. • Sunlight judgment is as following 13.16.2.1 Sunlight Intensity Reset •...
  • Page 81 13.16.2.3 Judge Ambient Condition • According to sunlight intensity over a period of time, the system will analyze the ambient condition is sunny, cloudy or night. 13.16.2.4 Temperature Shift • In a room without window or with thick curtain, the sunlight sensor will judge as cloudy/night. 13.16.2.5 Sunlight Sensor Check Mode •...
  • Page 82 13.16.2.6 Sunlight Sensor Abnormality • Abnormality detection: When ECONAVI is ON, if the sunlight intensity value below minimum level continuously for 24 hours, the sunlight sensor disconnection error counter will increase by 1 time. If the ECONAVI is OFF, the 24 hours timer will be reset, but the sunlight sensor disconnection error counter will not be reset.

  • Page 83: Protection Control

    14. Protection Control (For A9/12PK) 14.1 Restart Control (Time Delay Safety Control) • When the thermo-off temperature (temperature which compressor stops to operate) is reached during: - Cooling/Heating operation - the compressor stops for 3 minutes (minimum) before resume operation. Soft Dry operation - the compressor stops for 6 minutes (minimum) before resume operation.

  • Page 84: Compressor Reverse Rotation Protection Control

    14.6 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 (cooling mode)/5°C (heating mode) or less for continuous 2 minutes, compressor will stop and restart automatically.

  • Page 85: 4-Way Valve Control

    14.10 4-Way Valve Control • 4-way valve always on during Heating operation. (except deicing operation) • When the unit is switched off by remote control during Heating operation, the 4-way valve stay at Heating position for 5 minutes. • This is to prevent the refrigerant flow process sound for being occur. 14.11 Outdoor Fan Motor Control •...

  • Page 86: Deice Control

    14.14 Deice Control Deice starts to prevent frosting at outdoor heat exchanger. • Normal Deice Deice operations detection commences after 30 minutes of Heating operation starts or 60 minutes after previous deice operation. If the TRS (Thermal Reed Switch) senses the outdoor piping temperature drops to -3°C (TRS CLOSE) or less for 50 sec.
  • Page 87 Normal Deice Time Diagram Overload Deice Time Diagram...

  • Page 88: Restart Control (Time Delay Safety Control)

    (For A18/24/28PK) 14.15 Restart Control (Time Delay Safety Control) • When the thermo-off temperature (temperature which compressor stops to operate) is reached during:- Cooling / Heating operation - the compressor stops for 3 minutes (minimum) before resume operation. Soft Dry operation - the compressor stops for 6 minutes (minimum) before resume operation. •...

  • Page 89: Compressor Reverse Rotation Protection Control

    14.20 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 (cooling mode)/5°C (heating mode) or less for continuous 2 minutes, compressor will stop and restart automatically.

  • Page 90: Overload Protection Control

    14.22 Overload Protection Control • Outdoor Fan Control If the temperature of the Outdoor Heat Exchanger less than -3°C, Outdoor Fan is ON. The Outdoor Fan stop, when Outdoor Heat Exchanger temperature is Tb or more according to Outdoor Air Temperature region as table below: The Outdoor Fan restarts when the indoor heat exchanger temperature falls to 49°C.

  • Page 91: Cold Draft Prevention Control

    14.25 Cold Draft Prevention Control 14.26 Deice Control Deice starts to prevent frosting at outdoor heat exchanger. • Normal Deice Deice operation detection commences in Heating operation starts or 60 minutes after previous deice operation. If the outdoor piping temperature drops to -4°C for 50 sec. continuously during compressor is in operation, deice will start.
  • Page 92 a) Normal Deice Time Diagram b) Overload Deice Time Diagram...

  • Page 93: Servicing Mode

    15. Servicing Mode 15.1 Auto OFF/ON Button Auto OFF/ON Auto OFF/ON Auto OFF/ON Button Pressed Button Pressed Button Pressed 5 sec 5 sec Auto Operation Test Run Operation Stop Various Setting Mode Stop (Forced Cooling Operation) “Beep” 2 x “Beep” AUTO OPERATION MODE The Auto Operation will be activated immediately once the Auto OFF/ON button is pressed.

  • Page 94: Remote Control Button

    15.2 Remote Control Button 15.2.1 SET Button • To check current remote control transmission code and store the transmission code to EEPROM: Press “Set” button continuously for 10 seconds by using pointer. Press “Timer Set” button until a “beep” sound is heard as confirmation of transmission code change. 15.2.2 RESET (RC) •...

  • Page 95: Troubleshooting Guide

    16. Troubleshooting Guide 16.1 Refrigeration cycle system In order to diagnose malfunctions, make sure that there are no Normal Pressure and Outlet Air Temperature (Standard) electrical problems before inspecting the refrigeration cycle. Gas Pressure Outlet air Temperature Such problems include insufficient insulation, problem with the (kg/cm (°C) power source, malfunction of a compressor and a fan.
  • Page 96 16.1.1 Relationship between the condition of the air conditioner and pressure and electric current Cooling Mode Heating Mode Condition of the Electric current Electric current air conditioner Low Pressure High Pressure Low Pressure High Pressure during operation during operation Insufficient refrigerant (gas leakage) Clogged capillary tube or strainer...

  • Page 97: Disassembly And Assembly Instructions

    High Voltage is generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks. 17.1 CS-A9PKD CS-A12PKD 17.1.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 17.1.1.1...
  • Page 98 Figure 3 Figure 4 17.1.1.3 To remove discharge grille Figure 5...
  • Page 99 17.1.1.4 To remove control board Figure 6 17.1.1.5 To remove cross flow fan and indoor fan motor Figure 7 Figure 8...
  • Page 100 Figure 9 Figure 10...

  • Page 101: Cs-A18Pkd Cs-A24Pkd Cs-A28Pkd

    WARNING High Voltage is generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks. 17.2 CS-A18PKD CS-A24PKD CS-A28PKD 17.2.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 17.2.1.1...
  • Page 102 17.2.1.3 To remove electronic controller Figure 13 Figure 14 Figure 15 17.2.1.4 To remove discharge grille Figure 16...
  • Page 103 17.2.1.5 To remove control board Figure 17 17.2.1.6 To remove cross flow fan and indoor fan motor Figure 18 Figure 19...
  • Page 104 Figure 20 Figure 21...

  • Page 105: Technical Data

    18. Technical Data 18.1 Thermostat Characteristics...

  • Page 106: Operation Characteristics

    18.2 Operation Characteristics 18.2.1 CS-A9PKD CU-A9PKD • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 7.5m...
  • Page 107 • Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35/24°C...
  • Page 108 • Heating Characteristic Room temperature: 20°C Operation condition: High fan speed Piping length: 7.5m...
  • Page 109 • Piping Length Characteristic Room temperature: 20°C Operation condition: High fan speed Outdoor temperature: 7/6°C...
  • Page 110 18.2.2 CS-A12PKD CU-A12PKD • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 7.5m...
  • Page 111 • Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35/24°C...
  • Page 112 • Heating Characteristic Room temperature: 20°C Operation condition: High fan speed Piping length: 7.5m...
  • Page 113 • Piping Length Characteristic Room temperature: 20°C Operation condition: High fan speed Outdoor temperature: 7/6°C...
  • Page 114 18.2.3 CS-A18PKD CU-A18PKD • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 5.0m...
  • Page 115 • Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT), 24°C (WBT) Piping length: 5.0m...
  • Page 116 • Heating Characteristic Room temperature: 20°C (DBT) Operation condition: High fan speed Piping length: 5.0m...
  • Page 117 • Piping Length Characteristic Room temperature: 20°C (DBT) Operation condition: High fan speed Outdoor temperature: 7°C (DBT), 6°C (WBT) Piping length: 5.0m...
  • Page 118 18.2.4 CS-A24PKD CU-A24PKD • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 5.0m...
  • Page 119 • Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT), 24°C (WBT) Piping length: 5.0m...
  • Page 120 • Heating Characteristic Room temperature: 20°C (DBT) Operation condition: High fan speed Piping length: 5.0m...
  • Page 121 • Piping Length Characteristic Room temperature: 20°C (DBT) Operation condition: High fan speed Outdoor temperature: 7°C (DBT), 6°C (WBT) Piping length: 5.0m...
  • Page 122 18.2.5 CS-A28PKD CU-A28PKD • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 5.0m...
  • Page 123 • Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT), 24°C (WBT) Piping length: 5.0m...
  • Page 124 • Heating Characteristic Room temperature: 20°C (DBT) Operation condition: High fan speed Piping length: 5.0m...
  • Page 125 • Piping Length Characteristic Room temperature: 20°C (DBT) Operation condition: High fan speed Outdoor temperature: 7°C (DBT), 6°C (WBT) Piping length: 5.0m...

  • Page 126: Exploded View And Replacement Parts List126

    19. Exploded View and Replacement Parts List 19.1 Indoor Unit 19.1.1 CS-A9PKD CS-A12PKD Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 127 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CS-A9PKD CS-A12PKD REMARK CHASSIS COMPLETE CWD50C1653 ← FAN MOTOR CWA921447 ← CROSS FLOW FAN COMPLETE CWH02C1149 ← BEARING ASS’Y CWH64K007 ← SCREW - CROSS FLOW FAN CWH551146 ← ION GENERATOR CWH94C0043 ←...
  • Page 128 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CS-A9PKD CS-A12PKD REMARK CWG861497 ← SHOCK ABSORBER (LEFT) CWG713386 ← SHOCK ABSORBER (RIGHT) CWG713387 ← C.C.CASE CWG569049 CWG569050 INSTALLATION INSTRUCTION CWF615796 ← (Note) • All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488).
  • Page 129 19.1.2 CS-A18PKD CS-A24PKD CS-A28PKD Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 130 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CS-A18PKD CS-A24PKD CS-A28PKD REMARK CHASSIS COMPLETE CWD50C1654 ← ← FAN MOTOR ARW7671AC ARW7627AC ← CROSS FLOW FAN COMPLETE CWH02C1150 ← ← BEARING ASS’Y CWH64K007 ← ← SCREW - CROSS FLOW FAN CWH551146 ←...
  • Page 131 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CS-A18PKD CS-A24PKD CS-A28PKD REMARK INSTALLATION INSTRUCTION CWF615794 ← CWF615807 CWG861498 ← ← SHOCK ABSORBER CWG713402 ← ← SHOCK ABSORBER CWG713403 ← ← C.C.CASE CWG569051 CWG569052 CWG569053 INSTALLATION INSTRUCTION CWF615796 ← CWF615809 (Note) •...

  • Page 132: Outdoor Unit

    19.2 Outdoor Unit 19.2.1 CU-A9PKD Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 133 19.2.2 CU-A12PKD Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 134 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-A9PKD CU-A12PKD REMARK CHASSIS ASSY CWD50K2112 CWD52K1308 SOUND PROOF MATERIAL CWG302255 CWG302110 FAN MOTOR BRACKET CWD541075 CWD541157 SCREW - FAN MOTOR BRACKET CWH551217 ← FAN MOTOR CWA951674 CWA951692 SCREW - FAN MOTOR MOUNT CWH55252J CWH55406J PROPELLER FAN ASSY...
  • Page 135 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-A9PKD CU-A12PKD REMARK C.C.CASE CWG568886 CWG568887 WIRE NET CWD041057A CWD041111A (Note) • All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488). • “O” marked parts are recommended to be kept in stock.
  • Page 136 19.2.3 CU-A18PKD CU-A24PKD Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 137 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-A18PKD CU-A24PKD REMARK CHASSIS ASSY CWD52K1270 CWD50K2087 COMPRESSOR 2JS318D3AA04 2JS438D3CC04 ANTI - VIBRATION BUSHING CWH50055 ← NUT - COMPRESSOR MOUNT CWH561049 ← PACKING CWB81043 ← CONDENSER CWB32C3667 CWB32C2679 SOUND PROOF BOARD CWH151267 CWH151051 FAN MOTOR BRACKET CWD541154...
  • Page 138 19.2.4 CU-A28PKD Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
  • Page 139 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-A28PKD REMARK CHASSIS ASSY CWD50K2087 COMPRESSOR 2JD514E3AA03 ANTI - VIBRATION BUSHING CWH50055 NUT - COMPRESSOR MOUNT CWH561049 PACKING CWB81043 CONDENSER CWB32C2681 SOUND PROOF BOARD CWH151056 FAN MOTOR BRACKET CWD541055 SCREW - FAN MOTOR BRACKET CWH551217 FAN MOTOR CWA951294J...
  • Page 140 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-A28PKD REMARK SHOCK ABSORBER (LEFT) CWG713124 C.C.CASE CWG568890 TUBE ASS’Y CWT025826 (Note) • All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488). • “O” marked parts are recommended to be kept in stock. Printed in Malaysia SY0113-0...

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