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Panasonic CS-PS9NKH 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.
In order to avoid frostbit, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
WARNING
PRECAUTION OF LOW TEMPERATURE
Indoor Unit
CS-PS9NKH
CS-PS12NKH
CS-PS18NKH
CS-PS24NKH
© Panasonic HA Air-Conditioning (M) Sdn. Bhd. 2011.
Unauthorized copying and distribution is a violation of law.
Order No: PHAAM1111019C3
Outdoor Unit
CU-PS9NKH
CU-PS12NKH
CU-PS18NKH
CU-PS24NKH

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Summary of Contents for Panasonic CS-PS9NKH

  • Page 1 PRECAUTION OF LOW TEMPERATURE In order to avoid frostbit, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit. © Panasonic HA Air-Conditioning (M) Sdn. Bhd. 2011. Unauthorized copying and distribution is a violation of law.

  • Page 2: Table Of Contents

    Troubleshooting Flowchart ......64 CS-PS24NKH CU-PS24NKH .....19 15. Disassembly and Assembly Instructions ..85 6. Block Diagram ..........20 15.1 CS-PS9/12/18NKH ........85 CS-PS9NKH CU-PS9NKH ......20 15.2 CS-PS24NKH ..........89 CS-PS12NKH CU-PS12NKH ....21 CS-PS18NKH CU-PS18NKH ....22 16. Technical Data ..........93 CS-PS24NKH CU-PS24NKH ....23...

  • 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 19. During installation, before run the compressor, confirm the refrigerant pipes are fixed. Operation of compressor without fixing the piping, setting the valves at open condition, a burst may occur and cause injury. 20. During pump down operation, stop the compressor before remove the refrigerant piping. (Removal of refrigeration piping while compressor is operating and valves are opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.) 21.

  • Page 5: Specification

    2. Specification Indoor CS-PS9NKH (MALAYSIA) CS-PS12NKH (MALAYSIA) Model Outdoor CU-PS9NKH (MALAYSIA) CU-PS12NKH (MALAYSIA) Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 0.84 2.64 2.73 0.92 3.51 3.55 Capacity BTU/h 2860 9000...
  • Page 6 Height(I/D / O/D) mm (inch) 290 (11-7/16) 511 (20-1/8) 290 (11-7/16) 511 (20-1/8) Dimension Width (I/D / O/D) mm (inch) 870 (34-9/32) 650 (25-19/32) 870 (34-9/32) 650 (25-19/32) Depth (I/D / O/D) mm (inch) 214 (8-7/16) 230 (9-1/16) 214 (8-7/16) 230 (9-1/16) Weight Net (I/D / O/D)
  • Page 7 Indoor CS-PS9NKH (Other/S.E.ASIA) CS-PS12NKH (Other/S.E.ASIA) Model Outdoor CU-PS9NKH (Other/S.E.ASIA) CU-PS12NKH (Other/S.E.ASIA) Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 0.84 2.64 2.73 0.92 3.51 3.55 Capacity BTU/h 2860 9000 9310 3140...
  • Page 8 Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 9.52 (3/8) 6.35 (1/4) / 12.7 (1/2) Standard length m (ft) 7.5 (24.6) 7.5 (24.6) Length range (min – max) m (ft) 3 (9.8) ~ 15 (49.2) 3 (9.8) ~ 15 (49.2) I/D &...
  • Page 9 Indoor CS-PS18NKH (MALAYSIA) CS-PS24NKH (MALAYSIA) Model Outdoor CU-PS18NKH (MALAYSIA) CU-PS24NKH (MALAYSIA) Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 1.10 5.00 5.43 1.12 6.01 6.80 Capacity BTU/h 3750 17100 18500 3820 20500 23200 kJ/h...
  • Page 10 Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 12.7 (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) ~ 20 (65.6) 3 (9.8) ~ 20 (65.6) I/D &...
  • Page 11 Indoor CS-PS18NKH (Other/S.E.ASIA) CS-PS24NKH (Other/S.E.ASIA) Model Outdoor CU-PS18NKH (Other/S.E.ASIA) CU-PS24NKH (Other/S.E.ASIA) Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 1.10 5.00 5.43 1.12 6.01 6.80 Capacity BTU/h 3750 17100 18500 3820 20500 23200 kJ/h...
  • Page 12 Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 12.7 (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) ~ 20 (65.6) 3 (9.8) ~ 20 (65.6) I/D &...

  • Page 13: Location Of Controls And Components

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

  • Page 14: Dimensions

    4. Dimensions Indoor Unit 4.1.1 CS-PS9NKH CS-PS12NKH CS-PS18NKH...
  • Page 15 4.1.2 CS-PS24NKH...

  • Page 16: Outdoor Unit

    Outdoor Unit 4.2.1 CU-PS9NKH CU-PS12NKH 4.2.2 CU-PS18NKH...
  • Page 17 4.2.3 CU-PS24NKH...

  • Page 18: Refrigeration Cycle Diagram

    5. Refrigeration Cycle Diagram CS-PS9NKH CU-PS9NKH CS-PS12NKH CU-PS12NKH...

  • Page 19: Cs-Ps18Nkh Cu-Ps18Nkh Cs-Ps24Nkh Cu-Ps24Nkh

    CS-PS18NKH CU-PS18NKH CS-PS24NKH CU-PS24NKH...

  • Page 20: Block Diagram

    6. Block Diagram CS-PS9NKH CU-PS9NKH...

  • Page 21: Cs-Ps12Nkh Cu-Ps12Nkh

    CS-PS12NKH CU-PS12NKH...

  • Page 22: Cs-Ps18Nkh Cu-Ps18Nkh

    CS-PS18NKH CU-PS18NKH...

  • Page 23: Cs-Ps24Nkh Cu-Ps24Nkh

    CS-PS24NKH CU-PS24NKH...

  • Page 24: Wiring Connection Diagram

    7. Wiring Connection Diagram Indoor Unit 7.1.1 CS-PS9NKH CS-PS18NKH CS-PS24NKH...
  • Page 25 7.1.2 CS-PS12NKH...

  • Page 26: Outdoor Unit

    Outdoor Unit 7.2.1 CU-PS9NKH Resistance of Compressor Windings MODEL CU-PS9NKH CONNECTION 5SS072XGA21 3.034Ω 3.021Ω 3.009Ω...
  • Page 27 7.2.2 CU-PS12NKH Resistance of Compressor Windings MODEL CU-PS12NKH CONNECTION 5RS092XCE21 1.152Ω 1.152Ω 1.152Ω...
  • Page 28 7.2.3 CU-PS18NKH Resistance of Compressor Windings MODEL CU-PS18NKH CONNECTION 5RD132XDA21 1.152Ω 1.152Ω 1.152Ω...
  • Page 29 7.2.4 CU-PS24NKH Resistance of Compressor Windings MODEL CU-PS24NKH CONNECTION 5RD132XBA21 1.897Ω 1.907Ω 1.882Ω...

  • Page 30: Electronic Circuit Diagram

    8. Electronic Circuit Diagram Indoor Unit 8.1.1 CS-PS9NKH CS-PS18NKH CS-PS24NKH...
  • Page 31 8.1.2 CS-PS12NKH...

  • Page 32: Outdoor Unit

    Outdoor Unit 8.2.1 CU-PS9NKH...
  • Page 33 8.2.2 CU-PS12NKH...
  • Page 34 8.2.3 CU-PS18NKH...
  • Page 35 8.2.4 CU-PS24NKH...

  • Page 36: Printed Circuit Board

    9. Printed Circuit Board Indoor Unit 9.1.1 Main Printed Circuit Board 9.1.1.1 CS-PS9NKH CS-PS18NKH CS-PS24NKH...
  • Page 37 9.1.1.2 CS-PS12NKH 9.1.2 Indicator Printed Circuit Board...

  • Page 38: Outdoor Unit

    Outdoor Unit 9.2.1 Main Printed Circuit Board 9.2.1.1 CU-PS9/12NKH...
  • Page 39 9.2.1.2 CU-PS18NKH...
  • Page 40 9.2.1.3 CU-PS24NKH...
  • Page 41 9.2.2 Noise Filter Printed Circuit Board 9.2.2.1 CU-PS9NKH CU-PS12NKH...

  • Page 42: Installation Instruction

    10. Installation Instruction 10.1 Select the Best Location 10.1.3 Indoor/Outdoor Unit Installation Diagram 10.1.1 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 43: Indoor Unit

    10.2 Indoor Unit 10.2.1 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 44 10.2.3 Indoor Unit Installation 10.2.3.1 For the right rear piping 10.2.3.2 For the right and right bottom piping 10.2.3.3 For the embedded piping (This can be used for left rear piping and bottom piping also.)
  • Page 45 10.2.4 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 46 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: Isolating Devices (Disconnecting means) should have minimum 3.0 mm contact gap.
  • Page 47 10.2.5 Wire Stripping And Connecting Requirement...

  • Page 48: Outdoor Unit

    10.3 Outdoor Unit 10.3.1 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 (ø10mm). When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or nails.
  • Page 49 AIR PURGING METHOG IS PROHIBITED FOR R410A SYSTEM 10.3.3 Evacuation of the Equipment WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the following procedure. 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.
  • Page 50 10.3.4 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 4 x 1.5 mm (1.0 ~ 1.5HP) or 4 x 2.5 mm (2.0 ~ 2.5HP) flexible cord, type designation 245 IEC 57 or heavier cord.

  • Page 51: Operation Control

    11. Operation Control 11.1 Basic Function Inverter control, which equipped with a microcomputer in determining the most suitable operation mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operation mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature shifting.

  • Page 52: Indoor Fan Motor Operation

    After the operation mode is decided, the unit operation will follow the respective operation mode control. 11.2 Indoor Fan Motor Operation 11.2.1 Basic Rotation Speed Manual Fan Speed Fan motor’s number of rotation is determined according to remote control setting. Remote control ○...

  • Page 53: Airflow Direction

    11.4 Airflow Direction There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by vertical vanes). Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger temperature and intake air temperature) and manual (angles of direction can be adjusted using remote control).

  • Page 54: Timer Control

    11.5 Timer Control 11.5.1 ON Timer Control ON timer can be set using remote control, where the unit with timer set will start operation earlier than the setting time. This is to provide a comfortable environment when reaching the set ON time. 60 minutes before the set ON time, indoor (at fan speed of Lo-) and outdoor fan motor start operation for 30 seconds to determine the indoor intake air temperature and outdoor air temperature in order to judge the operation starting time.

  • Page 55: Protection Control

    12. Protection Control 12.1 Restart Control (Time Delay Safety Control) The compressor will not turn on within 3 minutes from the moment operation stops, although the unit is turned on again by pressing OFF/ON button at remote control within this period. This control is not applicable if the power supply is cut off and on again.

  • Page 56: Low Pressure Prevention Control (Gas Leakage Detection)

    12.5 Low Pressure Prevention Control (Gas Leakage Detection) Control start conditions For 5 minutes, the compressor continuously operates and outdoor total current is between 0.65A and 1.65A. During Cooling and Soft Dry operation: Indoor suction temperature – indoor piping temperature is below 4°C Control contents Compressor stops (and restart after 3 minutes).

  • Page 57: Cooling Overload Control

    12.10 Cooling Overload Control Pipe temperature limitation / restriction. Detects the outdoor pipe temperature and carry out restriction / limitation below (Limit the compressor operation frequency) The compressor stops if outdoor pipe temperature exceeds 61°C (PS9, 12NK), 63°C (PS18, 24NK). If the compressor stops 4 times in 20 minutes, Timer LED blinks (“F95”...

  • Page 58: Servicing Mode

    13. Servicing Mode 13.1 Auto Off/On Button Auto OFF/ON Auto OFF/ON Button Pressed Button Pressed 5 sec Auto Operation Test Run Operation Stop (Forced Cooling Operation) AUTO OPERATION MODE The Auto Operation will be activated immediately once the Auto OFF/ON button is pressed. This operation can be used to operate air conditioner with limited function if remote control is misplaced or malfunction.

  • Page 59: Remote Control Button

    13.2 Remote Control Button 13.2.1 SET Button To check remote control transmission code and store the transmission code to EEPROM Press “Set” button for more than 10 seconds by using pointer Press “Timer Set” button unit a “beep” sound is heard as confirmation of transmission code change. 13.2.2 RESET (RC) Button To clear and restore the remote control setting to factory default.

  • Page 60: Troubleshooting Guide

    14. Troubleshooting Guide 14.1 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 61 14.1.1 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 62: Breakdown Self Diagnosis Function

    14.2 Breakdown Self Diagnosis Function 14.2.1 Self Diagnosis Function (Three Digits Alphanumeric Code) Once error occurred during operation, the unit will stop its operation, and Timer LED blinks. Although Timer LED goes off when power supply is turned off, if the unit is operated under a breakdown condition, the LED will ON again.

  • Page 63: Error Code Table

    14.3 Error Code Table Diagnosis Emergency Abnormality / Protection control Abnormality Judgment Primary location to verify display Operation No abnormality detected Normal operation Indoor / Outdoor abnormal > 1 min after starting Indoor fan operation Internal / external cable connection communication operation only...

  • Page 64: Troubleshooting Flowchart

    14.4 Troubleshooting Flowchart 14.4.1 H11 (Indoor/Outdoor Abnormal Communication) Malfunction Decision Conditions During startup and operation of cooling and heating, the data received from outdoor unit in indoor unit signal transmission is checked whether it is normal. Malfunction Caused Faulty indoor unit PCB. Faulty outdoor unit PCB.
  • Page 65 14.4.2 H12 (Indoor/Outdoor Capacity Rank Mismatched) Malfunction Decision Conditions During startup, error code appears when different types of indoor and outdoor units are interconnected. Malfunction Caused Wrong models interconnected. Wrong indoor unit or outdoor unit PCBs mounted. Indoor unit or outdoor unit PCBs defective. Indoor-outdoor unit signal transmission error due to wrong wiring.
  • Page 66 14.4.3 H14 (Indoor Intake Air Temperature Sensor Abnormality) Malfunction Decision Conditions During startup and operation of cooling and heating, the temperatures detected by the indoor intake air temperature sensor are used to determine sensor errors. Malfunction Caused Faulty connector connection. Faulty sensor.
  • Page 67 14.4.4 H15 (Compressor Temperature Sensor Abnormality) Malfunction Decision Conditions During startup and operation of cooling and heating, the temperatures detected by the outdoor compressor temperature sensor are used to determine sensor errors. Malfunction Caused Faulty connector connection. Faulty sensor. Faulty PCB. Troubleshooting...
  • Page 68 14.4.5 H16 (Outdoor Current Transformer Open Circuit) Malfunction Decision Conditions A current transformer (CT) is detected by checking the compressor running frequency (≥ rated frequency) and CT detected input current (less than 1.14A) for continuously 20 seconds. Malfunction Caused CT defective Outdoor PCB defective Compressor defective (low compression) Troubleshooting...
  • Page 69 14.4.6 H19 (Indoor Fan Motor – DC Motor Mechanism Locked) Malfunction Decision Conditions The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor (feedback of rotation > 2550rpm or < 50rpm) Malfunction Caused Operation stops due to short circuit inside the fan motor winding.
  • Page 70 14.4.7 H23 (Indoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger temperature sensor are used to determine sensor errors. Malfunction Caused Faulty connector connection. Faulty sensor. Faulty PCB.
  • Page 71 14.4.8 H27 (Outdoor Air Temperature Sensor Abnormality) Malfunction Decision Conditions During startup and operation of cooling and heating, the temperatures detected by the outdoor air temperature sensor are used to determine sensor errors. Malfunction Caused Faulty connector connection. Faulty sensor. Faulty PCB.
  • Page 72 14.4.9 H28 (Outdoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions During startup and operation of cooling and heating, the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor errors. Malfunction Caused Faulty connector connection. Faulty sensor. Faulty PCB.
  • Page 73 14.4.10 H33 (Unspecified Voltage between Indoor and Outdoor) Malfunction Decision Conditions The supply power is detected for its requirement by the indoor/outdoor transmission. Malfunction Caused Wrong models interconnected. Wrong indoor unit and outdoor unit PCBs used. Indoor unit or outdoor unit PCB defective. Troubleshooting...
  • Page 74 14.4.11 H98 (Indoor High Pressure Protection) Error Code will not display (no Timer LED blinking) but store in EEPROM Malfunction Decision Conditions During heating operation, the temperature detected by the indoor pipe temperature sensor is above 60°C. Malfunction Caused Clogged air filter of the indoor unit Dust accumulation on the indoor unit heat exchanger Air short circuit Detection error due to faulty indoor pipe temperature sensor...
  • Page 75 14.4.12 H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry) Malfunction Decision Conditions Freeze prevention control takes place (when indoor pipe temperature is lower than 2°C) Malfunction Caused Clogged air filter of the indoor unit Dust accumulation on the indoor unit heat exchanger Air short circuit Detection error due to faulty indoor pipe temperature sensor Detection error due to faulty indoor unit PCB...
  • Page 76 14.4.13 F11 (Indoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions When cooling operation, when indoor pipe temperature or indoor heat exchanger temperature sensor is above 45°C. Malfunction Caused Faulty connector connection. Faulty indoor pipe temperature sensor. Faulty indoor main PCB. Troubleshooting...
  • Page 77 14.4.14 F90 (Power Factor Correction Protection) Malfunction Decision Conditions During startup and operation of cooling and heating, when Power Factor Correction (PFC) protection circuitry at the outdoor unit main PCB senses abnormal high DC voltage level. Malfunction Caused DC voltage peak due to power supply surge. DC voltage peak due to compressor windings not uniform.
  • Page 78 14.4.15 F91 (Refrigeration Cycle Abnormality) Malfunction Decision Conditions During cooling, compressor frequency = Fcmax. During cooling and heating operation, running current: 0.65A < I < 1.65A. During cooling, indoor intake - indoor pipe < 4°C. Malfunction Caused Refrigerant shortage (refrigerant leakage) Poor compression performance of compressor.
  • Page 79 14.4.16 F93 (Compressor Rotation Failure) Malfunction Decision Conditions A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Caused Compressor terminal disconnect Outdoor PCB malfunction Troubleshooting...
  • Page 80 14.4.17 F95 (Cooling High Pressure Abnormality) Malfunction Decision Conditions During operation of cooling, when outdoor unit heat exchanger high temperature data (61°C) is detected by the outdoor pipe temperature sensor. Malfunction Caused Outdoor pipe temperature rise due to short circuit of hot discharge air flow. Outdoor pipe temperature rise due to defective of outdoor fan motor.
  • Page 81 14.4.18 F96 (IPM Overheating) Malfunction Decision Conditions During operating of cooling and heating, when IPM temperature data (100°C) is detected by the IPM temperature sensor. Malfunction Caused IPM overheats due to short circuit of hot discharge air flow. IPM overheats due to defective of outdoor fan motor. IPM overheats due to defective of internal circuitry of IPM.
  • Page 82 14.4.19 F97 (Compressor Overheating) Malfunction Decision Conditions During operation of cooling and heating, when compressor tank temperature data (112°C) is detected by the compressor tank temperature sensor. Malfunction Caused Refrigerant shortage (refrigerant leakage). 2/3 way valve closed. Detection error due to faulty compressor tank temperature sensor. Troubleshooting...
  • Page 83 14.4.20 F98 (Input Over Current Detection) Malfunction Decision Conditions During cooling and heating operation, when an input over-current (X value in Total Running Current Control) is detected by checking the input current value being detected by current transformer (CT) with the compressor running. Malfunction Caused Over-current due to compressor failure.
  • Page 84 14.4.21 F99 (Output Over Current Detection) Malfunction Decision Conditions During operation of cooling and heating, when an output over-current (18.5A) is detected by checking the current that flows in the inverter DC peak sensing circuitry. Malfunction Caused DC peak due to compressor failure. DC peak due to defective power transistor(s).

  • Page 85: Disassembly And Assembly Instructions

    15. Disassembly and Assembly Instructions 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. 15.1 CS-PS9/12/18NKH 15.1.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures...
  • Page 86 Figure 3 Figure 4 15.1.3 To remove discharge grille 11. Pull out to remove the drain hose from the discharge grille 12. Then pull the discharge grille downward gently to dismantle it Figure 5...
  • Page 87 15.1.4 To remove control board 13. Remove 4 screws holding the control board then pull out the control board. Figure 6 15.1.5 To remove cross flow fan and indoor fan motor 14. Remove the screw that holding the cross flow fan and fan motor axis.
  • Page 88 17. Push the holdfast to the left and lift up the evaporator. Evaporator 18. Remove the cross flow fan from the unit by 19. Fan motor can be removed after the pulling it to the left and downward. removal of cross flow fan. Reminder: To reinstall the fan motor, adjust the fan motor connector to 45°...

  • Page 89: Cs-Ps24Nkh

    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. 15.2 CS-PS24NKH 15.2.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 15.2.1.1 To remove front grille...
  • Page 90 15.2.3 To remove power electronic controller Figure 13 Figure 14 15.2.4 To remove discharge grille Figure 15...
  • Page 91 15.2.5 To remove control board Figure 16 15.2.6 To remove cross flow fan and indoor fan motor Figure 17 Figure 18...
  • Page 92 Figure 19 Figure 20...

  • Page 93: Technical Data

    16. Technical Data 16.1 Operation Characteristics 16.1.1 CS-PS9NKH CU-PS9NKH (Malaysia only) Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 7.5m Compressor Frequency = Fc 16.000 15.800 15.600 15.400 15.200 15.000 14.800 14.600 14.400 Outdoor Air Temperature (°C)
  • Page 94 Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT), 24°C (WBT) Compressor Frequency = Fc 15.300 15.200 15.100 15.000 14.900 14.800 Piping Length (m) 2.800 2.700 2.600 2.500 Piping Length (m) 1.100 1.095 1.090...
  • Page 95 16.1.2 CS-PS9NKH CU-PS9NKH Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 7.5m Compressor Frequency = Fc 16.000 15.800 15.600 15.400 15.200 15.000 14.800 14.600 14.400 Outdoor Air Temperature (°C) 2.900 2.800 2.700 2.600 2.500...
  • Page 96 Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT), 24°C (WBT) Compressor Frequency = Fc 15.300 15.200 15.100 15.000 14.900 14.800 Piping Length (m) 2.800 2.750 2.700 2.650 2.600 2.550 2.500 Piping Length (m) 1.100 1.095...
  • Page 97 16.1.3 CS-PS12NKH CU-PS12NKH (Malaysia only) Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 7.5m Compressor Frequency = Fc 15.800 15.300 14.800 14.300 13.800 Outdoor Air Temperature (°C) 3.700 3.600 3.500 3.400 3.300 3.200 3.100 Outdoor Air Temperature (°C) 5.700...
  • Page 98 Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT), 24°C (WBT) Compressor Frequency = Fc 14.800 14.700 14.600 14.500 14.400 14.300 Piping Length (m) 3.700 3.600 3.500 3.400 3.300 Piping Length (m) 1.015 1.010 1.005...
  • Page 99 16.1.4 CS-PS12NKH CU-PS12NKH Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 7.5m Compressor Frequency = Fc 15.600 15.400 15.200 15.000 14.800 14.600 14.400 14.200 14.000 13.800 Outdoor Air Temperature (°C) 3.700 3.600 3.500 3.400 3.300 3.200...
  • Page 100 Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT), 24°C (WBT) Compressor Frequency = Fc 14.800 14.700 14.600 14.500 14.400 14.300 Piping Length (m) 3.700 3.600 3.500 3.400 3.300 Piping Length (m) 1.020 1.015 1.010...
  • Page 101 16.1.5 CS-PS18NKH CU-PS18NKH (Malaysia only) Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: Compressor Frequency = Fc 16.400 15.900 15.400 14.900 14.400 Outdoor Air Temperature (°C) 5.300 5.100 4.900 4.700 4.500 4.300 Outdoor Air Temperature (°C) 7.600 7.400 7.200...
  • Page 102 Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT), 24°C (WBT) Compressor Frequency = Fc 15.500 15.400 15.300 15.200 15.100 15.000 14.900 Piping Length (m) 5.100 5.000 4.900 4.800 4.700 4.600 Piping Length (m) 1.060 1.050...
  • Page 103 16.1.6 CS-PS18NKH CU-PS18NKH Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: Compressor Frequency = Fc 15.900 15.700 15.500 15.300 15.100 14.900 14.700 14.500 14.300 Outdoor Air Temperature (°C) 5.300 5.100 4.900 4.700 4.500 4.300 Outdoor Air Temperature (°C) 8.100...
  • Page 104 Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT), 24°C (WBT) Compressor Frequency = Fc 15.400 15.300 15.200 15.100 15.000 14.900 14.800 Piping Length (m) 5.200 5.100 5.000 4.900 4.800 4.700 Piping Length (m) 0.940 0.930...
  • Page 105 16.1.7 CS-PS24NKH CU-PS24NKH (Malaysia only) Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: Compressor Frequency = Fc 14.500 14.300 14.100 13.900 13.700 13.500 Outdoor Air Temperature (°C) 6.300 6.100 5.900 5.700 5.500 Outdoor Air Temperature (°C) 9.900 9.400 8.900...
  • Page 106 Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT), 24°C (WBT) Compressor Frequency = Fc 14.300 14.200 14.100 14.000 13.900 13.800 13.700 Piping Length (m) 6.100 6.000 5.900 5.800 Piping Length (m) 0.910 0.900 0.890...
  • Page 107 16.1.8 CS-PS24NKH CU-PS24NKH Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: Compressor Frequency = Fc 14.400 14.200 14.000 13.800 13.600 13.400 Outdoor Air Temperature (°C) 6.300 6.100 5.900 5.700 5.500 Outdoor Air Temperature (°C) 10.100 9.600 9.100...
  • Page 108 Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT), 24°C (WBT) Compressor Frequency = Fc 14.200 14.100 14.000 13.900 13.800 13.700 13.600 Piping Length (m) 6.100 6.000 5.900 5.800 Piping Length (m) 0.870 0.860 0.850...

  • Page 109: Exploded View And Replacement Parts List

    17. Exploded View and Replacement Parts List 17.1 Indoor Unit 17.1.1 CS-PS9NKH CS-PS12NKH CS-PS18NKH 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 110 REF. PART NAME & DESCRIPTION QTY. CS-PS9NKH CS-PS12NKH CS-PS18NKH REMARK CHASSIS COMPLETE CWD50C1653 ← ← FAN MOTOR ARW7628AC CWA921434 ARW7628AC CROSS-FLOW FAN COMPLETE CWH02C1076 ← ← BEARING ASSY CWH64K007 ← ← SCREW - CROSS-FLOW FAN CWH551146 ← ← EVAPORATOR CWB30C3341...
  • Page 111 CS-PS9NKH CS-PS12NKH CS-PS18NKH REF. NO. PART NAME & DESCRIPTION QTY. REMARK Malaysia CHASSIS COMPLETE CWD50C1653 ← ← FAN MOTOR ARW7628AC CWA921434 ARW7628AC CROSS-FLOW FAN COMPLETE CWH02C1076 ← ← BEARING ASSY CWH64K007 ← ← SCREW - CROSS-FLOW FAN CWH551146 ← ←...
  • Page 112 17.1.2 CS-PS24NKH 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 113 REF. NO. PART NAME & DESCRIPTION QTY. CS-PS24NKH REMARK CHASSIS COMPLETE CWD50C1654 FAN MOTOR ARW7628AC CROSS-FLOW FAN COMPLETE CWH02C1077 BEARING ASSY CWH64K007 SCREW - CROSS-FLOW FAN CWH551146 EVAPORATOR CWB30C2780 FLARE NUT (LIQUID) CWT251030 FLARE NUT (GAS) CWT251033 CLIP FOR SENSOR CWH32143 CONTROL BOARD CASING CWH102449...
  • Page 114 CS-PS24NKH REF. NO. PART NAME & DESCRIPTION QTY. REMARK Malaysia CHASSIS COMPLETE CWD50C1654 FAN MOTOR ARW7628AC CROSS-FLOW FAN COMPLETE CWH02C1077 BEARING ASSY CWH64K007 SCREW - CROSS-FLOW FAN CWH551146 EVAPORATOR CWB30C2780 FLARE NUT (LIQUID) CWT251030 FLARE NUT (GAS) CWT251033 CLIP FOR SENSOR CWH32143 CONTROL BOARD CASING CWH102449...

  • Page 115: Outdoor Unit

    17.2 Outdoor Unit 17.2.1 CU-PS9NKH CU-PS12NKH 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 116 REF. NO. PART NAME & DESCRIPTION QTY. CU-PS9NKH CU-PS12NKH REMARK CHASSIS COMPLETE CWD50C1727 CWD50K2107 ANTI - VIBRATION BUSHING CWH501038 CWH50077 COMPRESSOR 5SS072XGA21 5RS092XCE21 NUT - COMPRESSOR MOUNT CWH56000J ← SOUND PROOF MATERIAL CWG302497 SOUND PROOF MATERIAL CWG302496 SOUND PROOF MATERIAL CWG302700 CWG302564 FAN MOTOR BRACKET...
  • Page 117 CU-PS9NKH CU-PS12NKH REF. NO. PART NAME & DESCRIPTION QTY. REMARK Malaysia CHASSIS ASSY CWD50C1727 CWD50K2107 ANTI - VIBRATION BUSHING CWH501038 CWH50077 COMPRESSOR 5SS072XGA21 5RS092XCE21 NUT - COMPRESSOR MOUNT CWH56000J ← SOUND PROOF MATERIAL CWG302497 SOUND PROOF MATERIAL CWG302496 SOUND PROOF MATERIAL CWG302700 CWG302564 FAN MOTOR BRACKET...
  • Page 118 17.2.2 CU-PS18NKH 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 119 REF. NO. PART NAME & DESCRIPTION QTY. CU-PS18NKH REMARK CHASSIS COMPLETE CWD50K2071 ANTI - VIBRATION BUSHING CWH50077 COMPRESSOR 5RD132XDA21 NUT - COMPRESSOR MOUNT CWH56000J SOUND PROOF MATERIAL CWG302707 FAN MOTOR BRACKET CWD541089 FAN MOTOR ARS6411AC SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH55252J...
  • Page 120 CU-PS18NKH REF. NO. PART NAME & DESCRIPTION QTY. REMARK Malaysia CHASSIS ASSY CWD50K2071 ANTI - VIBRATION BUSHING CWH50077 COMPRESSOR 5RD132XDA21 NUT - COMPRESSOR MOUNT CWH56000J SOUND PROOF MATERIAL CWG302707 FAN MOTOR BRACKET CWD541089 FAN MOTOR ARS6411AC SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH55252J...
  • Page 121 17.2.3 CU-PS24NKH Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service part.
  • Page 122 REF. NO. PART NAME & DESCRIPTION QTY. CU-PS24NKH REMARK CHASSIS COMPLETE CWD52K1249 ANTI - VIBRATION BUSHING CWH50077 COMPRESSOR 5RD132XBA21 NUT - COMPRESSOR MOUNT CWH56000J SOUND PROOF MATERIAL CWG302624 FAN MOTOR BRACKET CWD541154 FAN MOTOR CWA951752 SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH55252J...
  • Page 123 CU-PS24NKH REF. NO. PART NAME & DESCRIPTION QTY. REMARK Malaysia CHASSIS ASSY CWD52K1249 ANTI - VIBRATION BUSHING CWH50077 COMPRESSOR 5RD132XBA21 NUT - COMPRESSOR MOUNT CWH56000J SOUND PROOF MATERIAL CWG302624 FAN MOTOR BRACKET CWD541154 FAN MOTOR CWA951752 SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH55252J...

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