Panasonic CS-S9NKR Service Manual
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Panasonic CS-S9NKR 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-S9NKR
CS-S12NKR
CS-S18NKR
CS-S24NKR
CS-S28NKR
© Panasonic Appliances Air-Conditioning Malaysia
Sdn. Bhd. 2012. Unauthorized copying and distribution
is a violation of law.
Order No: PAPAMY1207092CE
Outdoor Unit
CU-S9NKR
CU-S12NKR
CU-S18NKR
CU-S24NKR
CU-S28NKR

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

  • Page 2: Table Of Contents

    14.4 Troubleshooting Flowchart ......64 Indoor Unit ..........12 15. Disassembly and Assembly Instructions ..89 Outdoor Unit ..........14 15.1 CS-S9NKR CS-S12NKR ......89 5. Refrigeration Cycle Diagram ......15 15.2 CS-S18NKR CS-S24NKR CS-S28NKR.. 93 CS-S9NKR CU-S9NKR 15.3 Outdoor Electronic Controller Removal CS-S12NKR CU-S12NKR......15...

  • 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 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. When remove piping while valves at open condition, burst may occur and cause injury.

  • Page 5: Specification

    2. Specification Indoor CS-S9NKR CS-S12NKR Model Outdoor CU-S9NKR CU-S12NKR Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. 0.90 2.60 3.00 0.90 2.60 3.00 0.90 3.50 4.00...
  • Page 6 Indoor CS-S9NKR CS-S12NKR Model Outdoor CU-S9NKR CU-S12NKR Control Capillary Tube Capillary Tube Device Refrigeration Refrigerant FV50S (320) FV50S (320) Cycle Refrigerant g (oz) R410A, 860 (30.4) R410A, 1.06k (37.4) Type Height mm (inch) 290 (11-7/16) / 619 (24-3/8) 290 (11-7/16) / 619 (24-3/8)
  • Page 7 Indoor CS-S18NKR Model Outdoor CU-S18NKR Performance Test Condition Phase, Hz Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 0.90 5.00 6.00 0.90 5.00 6.00 Capacity BTU/h 3070 17100 20500 3070 17100 20500 kcal/h 4300 5160 4300 5160 Running Current Input Power 1.30k 1.85k...
  • Page 8 Indoor CS-S18NKR Model Outdoor CU-S18NKR Control Expansion Valve Device Refrigeration Refrigerant FV50S (450) Cycle Refrigerant g (oz) R410A, 1.31k (46.2) Type Height mm (inch) 290 (11-7/16) / 795 (31-5/16) (I/D / O/D) Width Dimension mm (inch) 1070 (42-5/32) / 875 (34-15/32) (I/D / O/D) Depth mm (inch)
  • Page 9 Indoor CS-S24NKR CS-S28NKR Model Outdoor CU-S24NKR CU-S28NKR Performance Test Condition Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. 2.00 7.10 7.70 2.00 7.10 7.70 2.10 8.00 8.40 2.10 8.00 8.40 Capacity...
  • Page 10 Indoor CS-S24NKR CS-S28NKR Model Outdoor CU-S24NKR CU-S28NKR Control Capillary Tube Expansion Valve Device Refrigeration Refrigerant FV50S (800) FV50S (800) Cycle Refrigerant g (oz) R410A, 1.58k (55.8) R410A, 1.77k (62.5) Type Height mm (inch) 290 (11-7/16) / 795 (31-5/16) 290 (11-7/16) / 795 (31-5/16) (I/D / O/D) Width Dimension...

  • Page 11: Location Of Controls And Components

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

  • Page 12: Dimensions

    4. Dimensions Indoor Unit 4.1.1 CS-S9NKR CS-S12NKR...
  • Page 13 4.1.2 CS-S18NKR CS-S24NKR CS-S28NKR...

  • Page 14: Outdoor Unit

    Outdoor Unit 4.2.1 CU-S9NKR CU-S12NKR 4.2.2 CU-S18NKR CU-S24NKR CU-S28NKR...

  • Page 15: Refrigeration Cycle Diagram

    5. Refrigeration Cycle Diagram CS-S9NKR CU-S9NKR CS-S12NKR CU-S12NKR...

  • Page 16: Cs-S18Nkr Cu-S18Nkr Cs-S24Nkr Cu-S24Nkr Cs-S28Nkr Cu-S28Nkr

    CS-S18NKR CU-S18NKR CS-S24NKR CU-S24NKR CS-S28NKR CU-S28NKR...

  • Page 17: Block Diagram

    6. Block Diagram CS-S9NKR CU-S9NKR CS-S12NKR CU-S12NKR...

  • Page 18: Cs-S18Nkr Cu-S18Nkr

    CS-S18NKR CU-S18NKR...

  • Page 19: Cs-S24Nkr Cu-S24Nkr

    CS-S24NKR CU-S24NKR...

  • Page 20: Cs-S28Nkr Cu-S28Nkr

    CS-S28NKR CU-S28NKR...

  • Page 21: Wiring Connection Diagram

    7. Wiring Connection Diagram Indoor Unit 7.1.1 CS-S9NKR CS-S12NKR...
  • Page 22 7.1.2 CS-S18NKR CS-S24NKR CS-S28NKR...

  • Page 23: Outdoor Unit

    Outdoor Unit 7.2.1 CU-S9NKR CU-S12NKR...
  • Page 24 7.2.2 CU-S18NKR...
  • Page 25 7.2.3 CU-S24NKR...
  • Page 26 7.2.4 CU-S28NKR...

  • Page 27: Electronic Circuit Diagram

    8. Electronic Circuit Diagram Indoor Unit 8.1.1 CS-S9NKR CS-S12NKR...
  • Page 28 8.1.2 CS-S18NKR CS-S24NKR CS-S28NKR...

  • Page 29: Outdoor Unit

    Outdoor Unit 8.2.1 CU-S9NKR CU-S12NKR...
  • Page 30 8.2.2 CU-S18NKR...
  • Page 31 8.2.3 CU-S24NKR...
  • Page 32 8.2.4 CU-S28NKR...

  • Page 33: Printed Circuit Board

    9. Printed Circuit Board Indoor Unit 9.1.1 Main Printed Circuit Board 9.1.1.1 CS-S9NKR CS-S12NKR...
  • Page 34 9.1.1.2 CS-S18NKR CS-S24NKR CS-S28NKR 9.1.2 Indicator Printed Circuit Board...

  • Page 35: Outdoor Unit

    Outdoor Unit 9.2.1 Main Printed Circuit Board 9.2.1.1 CU-S9NKR CU-S12NKR...
  • Page 36 CN-DEMAND AC-GND CN-PWR...
  • Page 37 9.2.2 CU-S18NKR...
  • Page 38 9.2.3 CU-S24NKR CU-S28NKR...

  • Page 39: Installation Instruction

    10. Installation Instruction 10.1 Select The Best Location 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 40: 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. Dimension Model ○ ○ ○ ○ ○ ○ S9***, S12*** 490 mm 82 mm 439 mm 432 mm 43 mm 95 mm...

  • Page 41: Indoor Unit Installation

    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 43: Connect The Cable To The Indoor Unit

    10.2.4 Connect the Cable to the Indoor Unit The inside and outside connecting cable can be connected without removing the front grille. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 × 1.5 mm flexible cord, type designation 245 IEC 57 or heavier cord. Bind all the indoor and outdoor connecting cable with tape and route the connecting cable via the escapement.

  • Page 44: 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 45: Evacuation Of The Equipment

    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 46: Connect The Cable To The Outdoor Unit

    10.3.4 Connect the Cable to the Outdoor Unit 1. Remove the control board cover from the unit by loosening the screw. 2. Cable connection to the power supply through Isolating Devices (Disconnecting means). Connect approved type polychloroprene sheathed power supply cord 3 × 1.5 mm (1.0 ~ 1.5HP), 3 ×...

  • Page 47: Piping Insulation

    10.3.5 Piping Insulation 1. Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrap the insulated piping end to prevent water from going inside the piping. 2. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by using POLY-E FOAM with thickness 6 mm or above.

  • Page 48: Operation Control

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

  • Page 49: Indoor Fan Motor Operation

    11.1.3.2 Automatic Operation • This mode can be set using remote control and the operation is decided by remote control setting temperature, remote control operation mode and indoor intake air temperature. • During operation mode judgment, indoor fan motor (with speed of Lo-) is running for 30 seconds to detect the indoor intake air temperature.

  • Page 50: Outdoor Fan Motor Operation

    B. Feedback control • Immediately after the fan motor is started, feedback control is performed once every second. • During fan motor on, if fan motor feedback ≥ 2550 rpm or < 50 rpm continue for 10 seconds, the fan motor error counter increased, fan motor is then stop and restart.

  • Page 51: Quiet Operation (Cooling Mode/Cooling Area Of Dry Mode)

    11.4.2 Horizontal Airflow • Automatic horizontal airflow direction can be set using remote control; the vane swings left and right within the angles as stated below. Operation Mode Vane angle (°) Cooling and Soft dry 68 ~ 112 • Manual horizontal airflow direction can be set using remote control; the angles of the vane are as stated below and the positions of the vane are as Figure 2 above: Pattern Airflow Direction...

  • Page 52: Powerful Mode Operation

    11.6 Powerful Mode Operation • When the powerful mode is selected, the internal setting temperature will shift lower up to 2°C (for Cooling/Soft Dry) than remote control setting temperature for 20 minutes to achieve the setting temperature quickly. • Powerful operation stops condition When one of the following condition is satisfied, powerful operation stops: Quiet button is pressed.

  • Page 53: Auto Restart Control

    11.9 Auto Restart Control • When the power supply is cut off during the operation of air conditioner, the compressor will re-operate within three to four minutes (there are 10 patterns between 2 minutes 58 seconds and 3 minutes 52 seconds to be selected randomly) after power supply resumes.

  • Page 54: Protection Control

    12. Protection Control 12.1 Protection Control For All Operations 12.1.1 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. •...
  • Page 55 12.1.4 Compressor Overheating Prevention Control • Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The changes of frequency are as below. • If compressor discharge temperature exceeds 107°C, compressor will be stopped, occurs 4 times per 20 minutes, timer LED will be blinking.

  • Page 56: Protection Control For Cooling & Soft Dry Operation

    12.2 Protection Control For Cooling & Soft Dry Operation 12.2.1 Outdoor Air Temperature Control • The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below. • This control will begin 1 minute after the compressor starts. •...

  • Page 57: Odor Cut Control

    12.2.6 Odor Cut Control • To reduce the odor released from the unit. Start Condition AUTO FAN Speed is selected during COOL or DRY operation. During freeze prevention control and timer preliminary operation, this control is not applicable. Control content Depends on compressor conditions: 1.

  • 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 limit set temperature range for COOL mode. Set temperature range selection 13.2.2 CLOCK Button • To change the remote control time format: Press for more than 5 seconds 13.2.3 RESET (RC) Button •...

  • 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 • Internal / external cable connection Indoor / Outdoor abnormal > 1 min after starting Indoor fan operation 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.
  • 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. •...
  • 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. •...
  • 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.
  • 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 •...
  • 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 •...
  • 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. •...
  • Page 71 14.4.8 H25 (e-ion Air Purifying System Abnormal) Malfunction Decision Conditions • During standby of cooling and heating operation, e-ion breakdown occurs and air conditioner stops operation. Malfunction Caused • Faulty indoor main PCB. • Faulty indoor e-ion power module. Troubleshooting...
  • Page 72 14.4.9 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. •...
  • Page 73 14.4.10 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. •...
  • Page 74 14.4.11 H30 (Compressor Discharge Temperature Sensor Abnormality) Malfunction Decision Conditions • During startup and operation of cooling and heating, the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor errors. Malfunction Caused • Faulty connector connection. •...
  • Page 75 14.4.12 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.
  • Page 76 14.4.13 H58 (Patrol Sensor Abnormality) Malfunction Decision Conditions • If Patrol sensor feedback is 0V or 5V continuous for 6 hours. • Error will display only when the Patrol operation is ON. Malfunction Caused • Faulty connector connection. • Faulty Patrol sensor. Troubleshooting...
  • Page 77 14.4.14 H97 (Outdoor 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. Malfunction Caused • Operation stops due to short circuit inside the fan motor winding. •...
  • Page 78 14.4.15 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 •...
  • Page 79 14.4.16 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 •...
  • Page 80 14.4.17 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.
  • Page 81 14.4.18 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.
  • Page 82 14.4.19 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 •...
  • Page 83 14.4.20 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 84 14.4.21 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. •...
  • Page 85 14.4.22 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.
  • Page 86 14.4.23 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.
  • Page 87 14.4.24 F98 (Input Over Current Detection) Malfunction Decision Conditions During cooling and heating operation, when an input over-current (16.8A) 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 88: Troubleshooting

    14.4.25 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. •...

  • Page 89: 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. 15.1 CS-S9NKR CS-S12NKR 15.1.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 15.1.1.1...
  • Page 90 Figure 3 Figure 4 15.1.1.3 To remove discharge grille Figure 5...
  • Page 91 15.1.1.4 To remove control board Figure 6 15.1.1.5 To remove cross flow fan and indoor fan motor Figure 7 Figure 8...
  • Page 92 Figure 9 Figure 10...

  • Page 93: Cs-S18Nkr Cs-S24Nkr Cs-S28Nkr

    15.2 CS-S18NKR CS-S24NKR CS-S28NKR 15.2.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 15.2.1.1 To remove front grille Figure 11 15.2.1.2 To remove horizontal vane Figure 12...
  • Page 94 15.2.1.3 To remove main electronic controller Figure 13 Figure 14 Figure 15 15.2.1.4 To remove discharge grille Figure 16...
  • Page 95 15.2.1.5 To remove control board Figure 17 15.2.1.6 To remove cross flow fan and indoor fan motor Figure 18 Figure 19...
  • Page 96 Figure 20 Figure 21...

  • Page 97: Outdoor Electronic Controller Removal Procedures

    15.3 Outdoor Electronic Controller Removal Procedures 15.3.1 CU-S9NKR CU-S12NKR 1. Remove 5 screws of the Top Panel. Screws Top Panel Screw Screws Figure 1 2. Remove the 8 screws of the Front Panel. Front Panel Screws Screws Screw Screws Figure 2...
  • Page 98 3. Remove the screw of the Terminal Board Cover. 4. Remove the Top Cover of the Control Board by 4 hooks. Hooks Top Cover Hooks Control Board Terminal Board Cover Screw Figure 3 Remove 5 connectors from electronic controller Remove 1 screw Remove 2 connectors from reactor Remove 2 screws...

  • Page 99: Outdoor Electronic Controller Removal Procedures

    15.4 Outdoor Electronic Controller Removal Procedures 15.4.1 CU-S18NKR CU-S24NKR CU-S28NKR 1. Remove 8 screws of the Top Panel. Figure 1 2. Remove the 8 screws of the Front Panel. Figure 2...
  • Page 100 3. Remove the Top Cover of the Electronic Controller. Figure 3 4. Remove the control board. Figure 4 5. Remove the 6 screws of the Electronic Controller. Figure 5...

  • Page 101: Technical Data

    16. Technical Data 16.1 Operation Characteristics 16.1.1 CS-S9NKR CU-S9NKR • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 7.5m Compressor Freq:...
  • Page 102 • Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT) Compressor Freq:...
  • Page 103 16.1.2 CS-S12NKR CU-S12NKR • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 7.5m Compressor Freq:...
  • Page 104 • Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT) Compressor Freq:...
  • Page 105 16.1.3 CS-S18NKR CU-S18NKR • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 5.0m Compressor Freq:...
  • Page 106 • Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT) Compressor Freq:...
  • Page 107 16.1.4 CS-S24NKR CU-S24NKR • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 5.0m Compressor Freq:...
  • Page 108 • Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT) Compressor Freq:...
  • Page 109 16.1.5 CS-S28NKR CU-S28NKR • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 5.0m Compressor Freq:...
  • Page 110 • Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT) Compressor Freq:...

  • Page 111: Sensible Capacity Chart

    16.2 Sensible Capacity Chart • CS-S9NKR CU-S9NKR INDOOR OUTDOOR TEMPERATURE (ºC DB) CU-S9NKR ºC ºC 51.8 2.52 2.35 0.49 2.55 2.27 0.53 2.47 2.24 0.58 2.42 2.22 0.60 54.1 2.67 2.31 0.49 2.67 2.23 0.53 2.58 2.21 0.58 2.52 2.20 0.60...
  • Page 112 • CS-S18NKR CU-S18NKR INDOOR OUTDOOR TEMPERATURE (ºC DB) CU-S18NKR ºC ºC 51.8 4.99 4.01 1.00 4.83 3.88 1.10 4.66 3.82 1.19 4.59 3.80 1.23 54.1 5.29 3.94 1.01 5.06 3.81 1.10 4.86 3.78 1.20 4.78 3.76 1.24 50.0 5.46 3.99 1.02 5.22 3.87...
  • Page 113 • CS-S28NKR CU-S28NKR INDOOR OUTDOOR TEMPERATURE (ºC DB) CU-S28NKR ºC ºC 51.8 7.54 5.91 1.90 7.45 5.72 2.08 7.35 5.63 2.25 7.30 5.60 2.32 54.1 7.99 5.82 1.91 7.79 5.62 2.09 7.67 5.57 2.27 7.60 5.55 2.34 50.0 8.26 5.89 1.92 8.06 5.70...

  • Page 114: Exploded View And Replacement Parts List114

    17. Exploded View and Replacement Parts List 17.1 Indoor Unit 17.1.1 CS-S9NKR CS-S12NKR 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 115 REF. NO. PART NAME & DESCRIPTION QTY. CS-S9NKR CS-S12NKR REMARK CHASSY COMPLETE CWD50C1653 ← FAN MOTOR CWA921409 ← CROSS FLOW FAN COMPLETE CWH02C1076 ← BEARING ASS’Y CWH64K1006 ← SCREW - CROSS FLOW FAN CWH551146 ← EVAPORATOR CWB30C3629 CWB30C3628 FLARE NUT (LIQUID) CWT251030 ←...
  • Page 116 17.1.2 CS-S18NKR CS-S24NKR CS-S28NKR 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 117 REF NO. PART NAME & DESCRIPTION QTY. CS-S18NKR CS-S24NKR CS-S28NKR REMARK CHASSY COMPLETE CWD50C1654 ← ← FAN MOTOR ARW7627AC ← ← CROSS FLOW FAN COMPLETE CWH02C1077 ← ← BEARING ASS’Y CWH64K1006 ← ← SCREW - CROSS FLOW FAN CWH551146 ← ←...

  • Page 118: Outdoor Unit

    17.2 Outdoor Unit 17.2.1 CU-S9NKR CU-S12NKR 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-S9NKR CU-S12NKR REMARK BASE PAN ASS'Y CWD52K1283 ← FAN MOTOR BRACKET CWD541167 ← SCREW - FAN MOTOR BRACKET CWH551217 ← FAN MOTOR CWA951789 CWA951791 SCREW - FAN MOTOR MOUNT CWH55406J ← PROPELLER FAN ASS’Y CWH03K1066 ←...
  • Page 120 17.2.2 CU-S18NKR 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 121 REF. NO. DESCRIPTION & NAME QTY. CU-S18NKR REMARK BASE PAN ASS'Y CWD52K1292 ANTI - VIBRATION BUSHING CWH50077 COMPRESSOR 5RD132XFA21 NUT - COMPRESSOR MOUNT CWH56000J FAN MOTOR BRACKET CWD541126 FAN MOTOR CWA951620 SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH551040J PROPELLER FAN ASS’Y CWH001019...
  • Page 122 17.2.3 CU-S24NKR CU-S28NKR 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 123 REF. NO. PART NAME & DESCRIPTION QTY. CU-S24NKR CU-S28NKR REMARK BASE PAN ASS'Y CWD52K1230 ← ANTI - VIBRATION BUSHING CWH50055 ← PACKING CWB81043 ← COMPRESSOR 5KD240XAF21 ← NUT - COMPRESSOR MOUNT CWH561049 ← FAN MOTOR BRACKET CWD541126 CWD541127 FAN MOTOR CWA951671 EHDS80C60AC SCREW - FAN MOTOR BRACKET...
  • Page 124 Printed in Malaysia SB0712-0...

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