Panasonic CS-C9NKV Service Manual
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Panasonic CS-C9NKV 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-C9NKV
CS-C12NKV
CS-C18NKV
CS-C24NKV
CS-C28NKV
WARNING
© Panasonic Appliances Air-Conditioning (M) Sdn. Bhd. 2012.
Unauthorized copying and distribution is a violation of law.
Order No: PHAAM1201047C3
Outdoor Unit
CU-C9NKV
CU-C12NKV
CU-C18NKV
CU-C24NKV
CU-C28NKV

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Summary of Contents for Panasonic CS-C9NKV

  • 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 Appliances Air-Conditioning (M) Sdn. Bhd. 2012. Unauthorized copying and distribution is a violation of law.

  • Page 2: Table Of Contents

    Refrigeration cycle system ......71 Outdoor Unit ..........15 16. Disassembly and Assembly Instructions ..73 6. Refrigeration Cycle Diagram ......17 16.1 CS-C9NKV CS-C12NKV ......73 7. Block Diagram ..........18 16.2 CS-C18NKV CS-C24NKV CS-C28NKV ..........77 8. Wiring Connection Diagram ......21 17.

  • 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. The caution items stated here must be followed because these important contents are related to safety.
  • Page 4 WARNING 19. During installation, install the refrigerant piping properly before run the compressor. (Operation of compressor without fixing refrigeration piping and valves at opened condition will caused suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc). 20.

  • Page 5: Specification

    2. Specification Indoor CS-C9NKV CS-C12NKV Model Outdoor CU-C9NKV CU-C12NKV Performance Test Condition NEW JIS NEW JIS Phase, Hz Single, 60 Single, 60 Power Supply 2.65 3.56 Capacity BTU/h 9040 12100 kJ/h 9540 12820 Running Current Input Power 1.11k 3.19 3.21 BTU/hW 10.89...
  • Page 6 Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 9.52 (3/8) 6.35 (1/4) / 12.70 (1/2) Standard length m (ft) 7.5 (24.6) 7.5 (24.6) Length range (min – max) m (ft) 3 (9.8) ~ 10 (32.8) 3 (9.8) ~ 15 (49.2) I/D &...
  • Page 7 Indoor CS-C18NKV CS-C24NKV Model Outdoor CU-C18NKV CU-C24NKV Performance Test Condition NEW JIS NEW JIS Phase, Hz Single, 60 Single, 60 Power Supply 5.30 7.03 Capacity BTU/h 18100 24000 kJ/h 19100 25300 Running Current 12.0 Input Power 1.72k 2.55k 3.08 2.76 BTU/hW 10.52 9.41...
  • Page 8 Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 12.70 (1/2) 6.35 (1/4) / 15.88 (5/8) Standard length m (ft) 5.0 (16.4) 5.0 (16.4) Length range (min – max) m (ft) 3 (9.8) ~ 25 (82.0) 3 (9.8) ~ 25 (82.0) I/D &...
  • Page 9 Indoor CS-C28NKV Model Outdoor CU-C28NKV Performance Test Condition NEW JIS Phase, Hz Single, 60 Power Supply 8.40 Capacity BTU/h 28600 kJ/h 30240 Running Current 15.9 Input Power 3.42k 2.46 BTU/hW 8.36 Power Factor dB-A 49 / 44 Indoor Noise (H / L) Power Level dB 62 / - dB-A...
  • Page 10 Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 15.88 (5/8) Standard length m (ft) 5.0 (16.4) Length range (min – max) m (ft) 3 (9.8) ~ 30 (98.4) I/D & O/D Height different m (ft) 20 (65.6) Additional Gas Amount g/m (oz/ft) 30 (0.3) Length for Additional Gas...

  • Page 11: Features

    Features Air Purifying System with nanoe-G Deactivates and removes bacterial, viruses and mould. Long Installation Piping CS/CU-C9NK, long piping up to 10 meters. CS/CU-C12NK, long piping up to 15 meters. CS/CU-C18NK, CS/CU-C24NK, long piping up to 25 meters. CS/CU-C28NK, long piping up to 30 meters. Easy to use remote control Quality Improvement Random auto restart after power failure for safety restart operation...

  • 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-C9NKV CS-C12NKV...
  • Page 14 5.1.2 CS-C18NKV CS-C24NKV CS-C28NKV...

  • Page 15: Outdoor Unit

    Outdoor Unit 5.2.1 CU-C9NKV 5.2.2 CU-C12NKV...
  • Page 16 5.2.3 CU-C18NKV 5.2.4 CU-C24NKV CU-C28NKV...

  • Page 17: Refrigeration Cycle Diagram

    6. Refrigeration Cycle Diagram...

  • Page 18: Block Diagram

    7. Block Diagram 7.1.1 CS-C9NKV CU-C9NKV CS-C12NKV CU-C12NKV...
  • Page 19 7.1.2 CS-C18NKV CU-C18NKV CS-C24NKV CU-C24NKV...
  • Page 20 7.1.3 CS-C28NKV CU-C28NKV...

  • Page 21: Wiring Connection Diagram

    8. Wiring Connection Diagram CS-C9NKV CU-C9NKV CS-C12NKV CU-C12NKV Resistance of Indoor Fan Motor Windings Resistance of Compressor Windings MODEL CS-C9NKV CS-C12NKV MODEL CU-C9NKV CU-C12NKV CONNECTION CWA921443 CWA921443 CONNECTION 2R13C236BSC 2P19S236A1L BLUE-YELLOW 382.0Ω 382.0Ω 3.298Ω 2.237Ω YELLOW-RED 226.8Ω 226.8Ω 5.500Ω 2.710Ω...

  • Page 22: Cs-C18Nkv Cu-C18Nkv

    CS-C18NKV CU-C18NKV Resistance of Outdoor Fan Motor Windings Resistance of Compressor Windings MODEL CU-C18NK MODEL CU-C18NK CONNECTION CWA951707 CONNECTION 2KS252F5AA06 BLUE-YELLOW 45Ω 2.043Ω YELLOW-RED 58Ω 2.986Ω Note: Resistance at 20°C of ambient temperature. Note: Resistance at 20°C of ambient temperature.

  • Page 23: Cs-C24Nkv Cu-C24Nkv

    CS-C24NKV CU-C24NKV Resistance of Outdoor Fan Motor Windings Resistance of Compressor Windings MODEL CU-C24NK MODEL CU-C24NK CONNECTION CWA951708 CONNECTION 2JS386F3AA04 BLUE-YELLOW 57Ω 1.048Ω YELLOW-RED 59Ω 1.785Ω YELLOW-ORANGE 65Ω Note: Resistance at 20°C of ambient temperature. Note: Resistance at 20°C of ambient temperature.

  • Page 24: Cs-C28Nkv Cu-C28Nkv

    CS-C28NKV CU-C28NKV Resistance of Outdoor Fan Motor Windings Resistance of Compressor Windings MODEL CU-C28NK MODEL CU-C28NK CONNECTION CWA951357J CONNECTION 2JD488H3AA03 YELLOW-BLUE 59.8Ω 0.624Ω YELLOW-ORANGE 68.6Ω 1.821Ω YELLOW-RED 66.9Ω Note: Resistance at 20°C of ambient temperature. Note: Resistance at 20°C of ambient temperature.

  • Page 25: Electronic Circuit Diagram

    9. Electronic Circuit Diagram CS-C9NKV CU-C9NKV CS-C12NKV CU-C12NKV...

  • Page 26: Cs-C18Nkv Cu-C18Nkv

    CS-C18NKV CU-C18NKV...

  • Page 27: Cs-C24Nkv Cu-C24Nkv

    CS-C24NKV CU-C24NKV...

  • Page 28: Cs-C28Nkv Cu-C28Nkv

    CS-C28NKV CU-C28NKV...

  • Page 29: Printed Circuit Board

    10. Printed Circuit Board 10.1 Indoor Unit 10.1.1 Main Printed Circuit Board 10.1.1.1 CS-C9NKV CS-C12NKV...
  • Page 30 10.1.1.2 CS-C18NKV CS-C24NKV CS-C28NKV 10.1.2 Indicator and Receiver Printed Circuit Board 10.1.3 High Voltage Power Supply Printed Circuit Board...
  • Page 31 10.1.4 Comparator Printed Circuit Board 10.1.5 Human Activity Sensor Printed Circuit Board...

  • Page 32: 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 33: 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. The center of installation plate should be at more than at right and left of the wall. The distance from installation plate edge to ceiling should more than From installation plate left edge to unit’s left side is From installation plate right edge to unit’s right side is...
  • Page 34 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 35 11.2.4 Connect the Cable to the Indoor Unit 1. The inside and outside connection cable can be connected without removing the front grille. 2. a) INDOOR POWER SUPPLY MODEL (1.0 ~ 2.5HP) Connection cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 3 x 1.5 mm (1.0 ~ 1.5HP) or 3 x 2.5 (2.0 ~ 2.5HP) flexible cord, type designation...
  • Page 36 b) OUTDOOR POWER SUPPLY MODEL (3.0HP) Connection cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 x 1.5 mm (1.0 ~ 3.0HP) flexible cord, type designation 245 IEC 57 or heavier cord. Do not use joint connection cable. Replace the wire if the existing wire (from concealed wiring, or otherwise) is too short.
  • Page 37 11.2.5.1 Cutting and flaring the piping Please cut using pipe cutter and then remove the burrs. Remove the burrs by using reamer. If burrs are not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe. Please make flare after inserting the flare nut onto the copper pipes.

  • Page 38: Outdoor Unit

    11.3 Outdoor Unit 11.3.1 Install the Outdoor Unit After selecting the best location, start installation according 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 39 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 40 11.3.4 Air Purging of the Piping and Indoor The remaining air in the Refrigerant cycle which contains moisture may cause malfunction on the compressor. Remove the caps from the 2-way and 3-way valves. Remove the service-port cap from the 3-way valves. To open the valve, turn the valve stem of 2-way valve counter-clockwise approx.
  • Page 41 11.3.5 Connect the cable to the Outdoor Unit a) INDOOR POWER SUPPLY MODEL (1.0 ~ 2.5HP) 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 3 x 1.5 mm (1.0 ~ 1.5HP) or 3 x 2.5 mm (2.0 ~ 2.5HP) flexible...
  • Page 42 For wire stripping and connection requirement, refer to instruction of the indoor unit. WARNING This equipment must be properly earthed. Isolating Devices (Disconnecting means) should have minimum 3.0 mm contact gap. Earth wire shall be Yellow/Green (Y/G) in colour and longer than other AC wires for safety reason. 11.3.6 Piping Insulation Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation...

  • Page 43: Operation Control

    12. Operation Control 12.1 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 44 12.1.2 Cooling Operation Time Diagram (For CS-C18NK CU-C18NK, CS-C24NK CU-C24NK and CS-C28NK CU-C28NK)

  • Page 45: Soft Dry Operation

    12.2 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 46 12.2.2 Soft Dry Operation Time Diagram (For CS-C18NK CU-C18NK, CS-C24NK CU-C24NK and CS-C28NK CU-C28NK)

  • Page 47: Automatic Operation

    12.3 Automatic Operation Automatic operation can be set using remote control. This operation starts to operate with indoor fan at SLo speed for 20 seconds to judge the intake air temperature. After judged the temperature, the operation mode is determined by referring to the below standard. ↑...

  • Page 48: Indoor Fan Speed Control

    12.4 Indoor Fan Speed Control Indoor fan speed can be set using remote control. 12.4.1 Fan Speed Rotation Chart Fan Speed (rpm) Speed CS-C9NKV CS-C12NKV CS-C18NKV CS-C24NKV CS-C28NKV 1110 1110 1370 1440 1530 1010 1090 1200 1320 1490 1070 1180...
  • Page 49 For CS-C18NK, CS-C24NK and CS-C28NK Stop Manual Normal Auto Hi-90 Manual Me-90 Quiet CLo-90 Auto Hi-90 Me-90 Manual Powerful Auto Manual Normal Auto Manual Quiet Auto Manual Powerful Auto 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.

  • Page 50: Outdoor Fan Speed Control

    Auto Fan Speed during Soft Dry operation. Indoor fan will rotate alternately between off and Lo-. At the beginning of each compressor starts operation, indoor fan will increase fan speed gradually for deodorizing purpose. When compressor turned off for 6 minutes, indoor fan will start at Lo- to circulate the air in the room. This is to obtain the actual reading of intake air temperature.
  • Page 51 For CS-C18NK, CS-C24NK and CS-C28NK 12.6.2 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. The louver can be adjusted by pressing the button to the desired louver position.

  • Page 52: Horizontal Airflow Direction Control

    12.7 Horizontal Airflow Direction Control 12.7.1 Auto Control When the horizontal airflow is set to Auto using the remote control, the vanes swings left and right as shown in the diagram. When stopped with remote control, the discharge vanes are reset and stop at the reset position. During Cooling operation or Soft Dry operation, indoor fan motor may stop to rotate at certain periods.

  • Page 53: Powerful Operation

    12.8 Powerful Operation To achieve the setting temperature quickly. When powerful operation is set, the setting temperature will be automatically decreased 3°C internally against the present setting temperature (Lower temperature limit: 16°C). This operation automatically running under Shi fan speed (Cooling), Lo- Fan Speed (Soft Dry) is applicable for C9NK and C12NK only.

  • Page 54: Timer Control

    RPM control during Hi & Me cool Auto Fan Speed Quiet operation stops when: Quiet button is pressed again. Stopped by OFF/ON operation button. Timer OFF activates. Operation mode button is changed. 12.10 Timer Control 12.10.1 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 55: Nanoe-G Operation

    12.13 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 56 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 During nanoe-G operation, nanoe-G connector at main PCB is opened.
  • Page 57 Troubleshooting method Press nanoe-G button or OFF/ON button to stop the operation. Change nanoe-G high voltage power supply or main PCB. When Lo-feedback voltage supplied to nanoe-G system during nanoe-G operation ON, nanoe-G indicator and Timer indicator stop blinking.

  • Page 58: Auto Comfort And Eco Navi Operation

    12.14 AUTO COMFORT and ECO NAVI Operation AUTO COMFORT start condition: When AUTO COMF button is pressed. AUTO COMFORT stop conditions: When AUTO COMF 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 59 12.14.1.1 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 60 12.14.1.7 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 Louver position refer to horizontal airflow direction control.
  • Page 61 12.14.1.9 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 Right...
  • Page 62 12.14.1.10 Infrared 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 infrared sensor judge Lo level continuously for 25 seconds Error Code judgment When abnormality happened, internal counter increase by 1 time.
  • Page 63 12.14.2 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 12.14.2.1 Sunlight intensity reset The sunlight intensity will to reset to zero (no sunlight condition) when Each time ECONAVI is activated.
  • Page 64 12.14.2.3 Judge ambient condition According to sunlight intensity over a period of time, the system will analyze the ambient condition is sunny, cloudy or night. 12.14.2.4 Temperature shift 12.14.2.5 Sunlight Sensor Check Mode To enable sunlight sensor check mode, during unit is OFF (power standby): Operation details The sunlight sensor check mode will be operated for 5 minutes.
  • Page 65 12.14.2.6 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 66: Protection Control

    13. Protection Control 13.1 Restart Control (Time Delay Safety Control) When the thermo-off temperature (temperature which compressor stops to operate) is reach during:- Cooling operation – the compressor stops for 3 minutes (minimum) before resume operation. Soft Dry operation – the compressor stops for 6 minutes (minimum) before resume operation. If the operation is stopped by the remote control, the compressor will not turn on within 3 minutes from the moment operation stop, although the unit is turn on again within the period.

  • Page 67: Freeze Prevention Control

    13.5 Freeze Prevention Control To protect indoor heat exchanger from freezing and to prevent higher volume of refrigerant in liquid form return to compressor. This control will activate when temperature of indoor heat exchanger falls below 2°C continuously for more than 4 minutes and compressor turn off.

  • Page 68: Dew Prevention Control

    13.7 Dew Prevention Control To prevent dew formation at indoor unit discharge area. This control starts if: Cooling mode or Quiet mode is activated. Remote Control setting temperature is less than 25°C. Fan speed is at CLo or QLo. Room temperature is constant (±1°C) for 30 minutes. Compressor is continuously running.

  • Page 69: Servicing Mode

    14. Servicing Mode 14.1 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 70: Remote Control Button

    14.2 Remote Control Button 14.2.1 SET Button To check current remote control transmission code and store the transmission code to EEPROM: Press “Set” button continuously 10 seconds by using pointer. Press “Timer Set” button until a “beep” sound is heard as confirmation of transmission code change. 14.2.2 RESET To clear and restore the remote control setting to factory default.

  • Page 71: Troubleshooting Guide

    15. Troubleshooting Guide 15.1 Refrigeration cycle system In order to diagnose malfunctions, ensure the air conditioner is free Normal Pressure and Outlet Air Temperature (Standard) from 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 72 15.1.1 Relationship between the condition of the air conditioner and pressure and electric current Cooling Mode Condition of the air conditioner Low Pressure High Pressure Electric current during operation Insufficient refrigerant (gas leakage) Clogged capillary tube or strainer Short circuit in the indoor unit Heat radiation deficiency of the outdoor unit Inefficient compression...

  • Page 73: 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. 16.1 CS-C9NKV CS-C12NKV 16.1.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 16.1.1.1...
  • Page 74 Figure 3 Figure 4 16.1.1.3 To remove discharge grille Figure 5...
  • Page 75 16.1.1.4 To remove control board Figure 6 16.1.1.5 To remove cross flow fan and indoor fan motor Figure 7 Figure 8...
  • Page 76 Figure 9 Figure 10...

  • Page 77: Cs-C18Nkv Cs-C24Nkv Cs-C28Nkv

    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. 16.2 CS-C18NKV CS-C24NKV CS-C28NKV 16.2.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 16.2.1.1...
  • Page 78 16.2.1.3 To remove electronic controller Figure 13 Figure 14 Figure 15 16.2.1.4 To remove discharge grille Figure 16...
  • Page 79 16.2.1.5 To remove control board Figure 17 16.2.1.6 To remove cross flow fan and indoor fan motor Figure 18 Figure 19...
  • Page 80 Figure 20 Figure 21...

  • Page 81: Technical Data

    17. Technical Data 17.1 Thermostat Characteristics Cooling Soft Dry...

  • Page 82: Operation Characteristics

    17.2 Operation Characteristics 17.2.1 CS-C9NKV CU-C9NKV Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 7.5m 16.000 15.800 15.600 15.400 15.200 15.000 Outdoor Air Temperature (°C) 2.900 2.800 2.700 2.600 2.500 2.400 Outdoor Air Temperature (°C) 4.200...
  • Page 83 Piping Length Characteristic Outdoor temperature: 35°C (DBT), 24°C (WBT) Operation condition: High fan speed Piping length: 7.5m 15.800 15.700 15.600 15.500 15.400 Piping Length (m) 2.700 2.650 2.600 2.550 2.500 Piping Length (m) 0.560 0.550 0.540 0.530 0.520 0.510 0.500 Piping Length (m) 4.000 3.900...
  • Page 84 17.2.2 CS-C12NKV CU-C12NKV Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 7.5m 15.100 14.900 14.700 14.500 14.300 14.100 Outdoor Air Temperature (°C) 3.900 3.800 3.700 3.600 3.500 3.400 3.300 Outdoor Air Temperature (°C) 5.700 5.500 5.300...
  • Page 85 Piping Length Characteristic Outdoor temperature: 35°C (DBT), 24°C (WBT) Operation condition: High fan speed Piping length: 7.5m 14.900 14.800 14.700 14.600 14.500 Piping Length (m) 3.700 3.600 3.500 3.400 Piping Length (m) 0.550 0.540 0.530 0.520 0.510 0.500 Piping Length (m) 5.500 5.400 5.300...
  • Page 86 17.2.3 CS-C18NKV CU-C18NKV Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 15.900 15.700 15.500 15.300 15.100 14.900 Outdoor Air Temperature (°C) 5.700 5.500 5.300 5.100 4.900 Outdoor Air Temperature (°C) 8.600 8.400 8.200 8.000 7.800 7.600...
  • Page 87 Piping Length Characteristic Outdoor temperature: 35°C (DBT), 24°C (WBT) Operation condition: High fan speed Piping length: 16.100 15.900 15.700 15.500 15.300 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Piping Length (m) 5.500 5.300 5.100...
  • Page 88 17.2.4 CS-C24NKV CU-C24NKV Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 13.800 13.600 13.400 13.200 13.000 12.800 Outdoor Air Temperature (°C) 7.700 7.500 7.300 7.100 6.900 6.700 6.500 Outdoor Air Temperature (°C) 13.100 12.600 12.100 11.600...
  • Page 89 Piping Length Characteristic Outdoor temperature: 35°C (DBT), 24°C (WBT) Operation condition: High fan speed Piping length: 14.000 13.800 13.600 13.400 13.200 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Piping Length (m) 7.100 6.900 6.700...
  • Page 90 17.2.5 CS-C28NKV CU-C28NKV Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 15.400 15.200 15.000 14.800 14.600 14.400 Outdoor Air Temperature (°C) 9.000 8.800 8.600 8.400 8.200 8.000 7.800 Outdoor Air Temperature (°C) 17.200 16.700 16.200 15.700...
  • Page 91 Piping Length Characteristic Outdoor temperature: 35°C (DBT), 24°C (WBT) Operation condition: High fan speed Piping length: 15.600 15.400 15.200 15.000 14.800 Piping Length (m) 8.500 8.300 8.100 7.900 7.700 7.500 Piping Length (m) 0.420 0.410 0.400 0.390 0.380 0.370 0.360 0.350 0.340 Piping Length (m)

  • Page 92: Exploded View And Replacement Parts List

    18. Exploded View and Replacement Parts List 18.1 Indoor Unit 18.1.1 CS-C9NKV CS-C12NKV 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 93 REF. NO. PART NAME & DESCRIPTION QTY. CS-C9NKV CS-C12NKV REMARK CHASSIS COMPLETE CWD50C1653 ← FAN MOTOR CWA921443 ← CROSS FLOW FAN COMPLETE CWH02C1076 ← BEARING ASS'Y CWH64K007 ← SCREW - CROSS FLOW FAN CWH551146 ← GENERATOR COMPLETE CWH94C0043 ← EVAPORATOR...
  • Page 94 INSTALLATION INSTRUCTION CWF615037 ← POWER SUPPLY CORD – CO. CWA20C3064 ← CWG861497 ← SHOCK ABSORBER ( L ) CWG713386 ← SHOCK ABSORBER ( R ) CWG713387 ← C.C.CASE CWG567350 ← (Note) All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488). “O”...
  • Page 95 18.1.2 CS-C18NKV CS-C24NKV CS-C28NKV 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 96 REF. PART NAME & DESCRIPTION QTY. CS-C18NKV CS-C24NKV CS-C28NKV REMARK CHASSIS COMPLETE CWD50C1654 ← ← FAN MOTOR ARW7628AC ARW7627AC ← CROSS FLOW FAN COMPLETE CWH02C1077 ← ← BEARING ASS'Y CWH64K007 ← ← SCREW - CROSS FLOW FAN CWH551146 ← ← GENERATOR COMPLETE CWH94C0043 ←...
  • Page 97 INSTALLATION INSTRUCTION CWF615037 ← ← POWER SUPPLY CORD – CO. CWA20C2851 CWA20C2853 CWG861498 ← ← SHOCK ABSORBER ( L ) CWG713402 ← ← SHOCK ABSORBER ( R ) CWG713403 ← ← C.C.CASE CWG567453 ← ← (Note) All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488). “O”...

  • Page 98: Outdoor Unit

    18.2 Outdoor Unit 18.2.1 CU-C9NKV 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 99 18.2.2 CU-C12NKV 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 100 REF. PART NAME & DESCRIPTION CU-C9NKV CU-C12NKV REMARK CHASSIS ASS’Y CWD50K2107 CWD50K2071 SOUND PROOF MATERIAL CWG302254 CWG302126 FAN MOTOR BRACKET CWD541075 CWD541030 SCREW - FAN MOTOR BRACKET CWH551217 ← FAN MOTOR CWA951562 CWA951329J SCREW - FAN MOTOR MOUNT CWH55406J ← PROPELLER FAN ASS’Y CWH03K1020 CWH03K1010...
  • Page 101 18.2.3 CU-C18NKV 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 102 REF. NO. PART NAME & DESCRIPTION CU-C18NKV REMARK CHASSIS ASS’Y CWD52K1265 SOUND PROOF MATERIAL CWG302406 FAN MOTOR BRACKET CWD541154 SCREW - FAN MOTOR BRACKET CWH551217 FAN MOTOR CWA951707 SCREW - FAN MOTOR MOUNT CWH55252J PROPELLER FAN ASS’Y CWH03K1017 NUT - PROPELLER FAN CWH561038J COMPRESSOR 2KS252F5AA06...
  • Page 103 18.2.4 CU-C24NKV 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 104 18.2.5 CU-C28NKV 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 105 REF. PART NAME & DESCRIPTION CU-C24NKV CU-C28NKV REMARK CHASSIS ASS’Y CWD50K2100 ← SOUND PROOF MATERIAL CWG302244 FAN MOTOR BRACKET CWD541065 CWD541055 SCREW - FAN MOTOR BRACKET CWH551217 ← FAN MOTOR CWA951708 CWA951357J SCREW - FAN MOTOR MOUNT CWH55252J ← PROPELLER FAN ASS’Y CWH03K1017 ←...
  • Page 106 SHOCK ABSORBER (L) CWG713124 ← C.C.CASE CWG566715 ← (Note) All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488). “O” marked parts are recommended to be kept in stock. Printed in Malaysia FY1201-0...

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