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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-S9NKV
CS-S12NKV
CS-S18NKV
CS-S24NKV
CS-S28NKV
WARNING
© Panasonic Appliances Air-Conditioning Malaysia
Sdn. Bhd. 2012. Unauthorized copying and distribution
is a violation of law.
Order No: PHAAM1201102C3
Outdoor Unit
CU-S9NKV
CU-S12NKV
CU-S18NKV
CU-S24NKV
CU-S28NKV
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Table of Contents
Troubleshooting
Related Manuals for Panasonic CS-S9NKV
Summary of Contents for Panasonic CS-S9NKV
- 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 Malaysia Sdn. Bhd. 2012. Unauthorized copying and distribution...
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Page 2: Table Of Contents
Low Frequency Protection Control 2 ..74 6. Block Diagram ..........20 12.10 Outdoor Air Temperature Control....75 12.11 Cooling Overload Control ......75 CS-S9NKV CU-S9NKV ......20 12.12 Freeze Prevention Control 1 ..... 75 CS-S12NKV CU-S12NKV ......21 12.13 Freeze Prevention Control 2 ..... 75 CS-S18NKV CU-S18NKV 12.14 Dew Prevention Control ...... -
Page 3: Safety Precautions
1. Safety Precautions • Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing. • Electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model installed. •... - Page 4 WARNING During installation, install the refrigerant piping properly before run the compressor. (Operation of compressor without fixing refrigeration piping and valves at opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.).
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Page 5: Specification
2. Specification Indoor CS-S9NKV CS-S12NKV Model Outdoor CU-S9NKV CU-S12NKV Performance Test Condition Phase, Hz Single, 60 Single, 60 Power Supply Min. Mid. Max. Min. Mid. Max. 0.84 2.65 3.20 0.92 3.23 4.00 Capacity BTU/h 2860 9040 10900 3140 11000 13600... - Page 6 Height(I/D / O/D) mm (inch) 290 (11-7/16) 511 (20-1/8) 290 (11-7/16) 542 (21-11/32) Dimension Width (I/D / O/D) mm (inch) 870 (34-9/32) 650 (25-19/32) 870 (34-9/32) 780 (30-23/32) Depth (I/D / O/D) mm (inch) 214 (8-7/16) 230 (9-1/16) 214 (8-7/16) 289 (11-13/32) Weight Net (I/D / O/D)
- Page 7 Indoor CS-S18NKV CS-S24NKV Model Outdoor CU-S18NKV CU-S24NKV Performance Test Condition Phase, Hz Single, 60 Single, 60 Power Supply Min. Mid. Max. Min. Mid. Max. 1.10 5.20 6.00 1.12 6.00 7.10 Capacity BTU/h 3750 17700 20500 3820 20500 24200 kJ/h 3960 18720 21600 4030...
- Page 8 Height(I/D / O/D) mm (inch) 290 (11-7/16) 695 (27-3/8) 290 (11-7/16) 695 (27-3/8) Dimension Width (I/D / O/D) mm (inch) 1070 (42-5/32) 875 (34-15/32) 1070 (42-5/32) 875 (34-15/32) Depth (I/D / O/D) mm (inch) 240 (9-15/32) 320 (12-5/8) 240 (9-15/32) 320 (12-5/8) Weight Net (I/D / O/D)
- Page 9 Indoor CS-S28NKV Model Outdoor CU-S28NKV Performance Test Condition Phase, Hz Single, 60 Power Supply Min. Mid. Max. 1.15 8.40 Capacity BTU/h 3920 26600 28600 kJ/h 4140 28080 30240 Running Current 12.6 Input Power 2.70k 2.95k 3.29 2.89 2.85 BTU/hW 11.20 9.85 9.69 kJ/hW...
- Page 10 Height(I/D / O/D) mm (inch) 290 (11-7/16) 795 (31-5/16) Dimension Width (I/D / O/D) mm (inch) 1070 (42-5/32) 875 (34-15/32) Depth (I/D / O/D) mm (inch) 240 (9-15/32) 320 (12-5/8) Weight Net (I/D / O/D) kg (lb) 12 (26) 57 (126) Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 15.88 (5/8)
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Page 11: Location Of Controls And Components
3. Location of Controls and Components Indoor Unit Aluminium Fin Auto OFF/ON button • Use when remote control is misplaced or a malfunction occurs Air Filters Indicator Front panel (Green) (Green) POWER (Orange) TIMER (Green) AUTO COMFORT (Blue) Human Activity Sensor NANOE-G (Orange) POWERFUL... -
Page 12: Dimensions
4. Dimensions Indoor Unit 4.1.1 CS-S9NKV CS-S12NKV <Top View> <Side View> <Side View> <Front View> Air intake direction Left piping Air outlet Right piping hole direction hole <Bottom View> <Remote Control> <Rear View> (41 ~ 61) <Remote Control Holder> Liquid side Gas side Relative position between the indoor unit and the installation plate <Front... - Page 13 4.1.2 CS-S18NKV CS-S24NKV CS-S28NKV <Top View> <Side View> <Side View> <Front View> Air intake direction 1070 Left piping Air outlet Right piping hole direction hole <Bottom View> <Remote Control> <Rear View> (41 ~ 61) <Remote Control Holder> Liquid side Gas side Relative position between the indoor unit and the installation plate <Front View>...
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Page 14: Outdoor Unit
Outdoor Unit 4.2.1 CU-S9NKV <Top View> (650) Space necessary for installation 10 cm 10 cm 100 cm 2-way valve at Liquid side Anchor Bolt Pitch (High Pressure) 261 x 474 3-way valve at Gas side (Low Pressure) <Side View> <Side View> <Front View>... - Page 15 4.2.3 CU-S18NKV CU-S24NKV...
- Page 16 4.2.4 CU-S28NKV...
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Page 17: Refrigeration Cycle Diagram
5. Refrigeration Cycle Diagram CS-S9NKV CU-S9NKV CS-S12NKV CU-S12NKV... -
Page 18: Cs-S18Nkv Cu-S18Nkv Cs-S24Nkv Cu-S24Nkv
CS-S18NKV CU-S18NKV CS-S24NKV CU-S24NKV... -
Page 19: Cs-S28Nkv Cu-S28Nkv
CS-S28NKV CU-S28NKV... -
Page 20: Block Diagram
6. Block Diagram CS-S9NKV CU-S9NKV... -
Page 21: Cs-S12Nkv Cu-S12Nkv
CS-S12NKV CU-S12NKV... -
Page 22: Cs-S18Nkv Cu-S18Nkv Cs-S24Nkv Cu-S24Nkv
CS-S18NKV CU-S18NKV CS-S24NKV CU-S24NKV... -
Page 23: Cs-S28Nkv Cu-S28Nkv
CS-S28NKV CU-S28NKV... -
Page 24: Wiring Connection Diagram
7. Wiring Connection Diagram Indoor Unit 7.1.1 CS-S9NKV CS-S12NKV... - Page 25 7.1.2 CS-S18NKV CS-S24NKV...
- Page 26 7.1.3 CS-S28NKV...
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Page 27: Outdoor Unit
Outdoor Unit 7.2.1 CU-S9NKV YELLOW (YLW) BLUE (BLU) RED (RED) TRADE MARK COMP. TERMINAL Resistance of Compressor Windings MODEL CU-S9NKV CONNECTION 5RS092XCE21 1.152Ω 1.152Ω 1.152Ω... - Page 28 7.2.2 CU-S12NKV TO INDOOR UNIT YELLOW (YLW) TERMINAL (BLACK) (WHITE) (RED) BOARD REACTOR BLUE (BLU) RED (RED) TRADE MARK COMP. TERMINAL RAT2 RAT1 DATA (RED) OUTDOOR AIR TEMP. SENSOR (THERMISTOR) NOISE FILTER SENSOR CN-TH CIRCUIT COMPLETE (WHT) AC-BLK (BLK) PIPING TEMP. COMMUNICATION SENSOR (THERMISTOR) CIRCUIT...
- Page 29 7.2.3 CU-S18NKV CU-S24NKV TO INDOOR UNIT YELLOW (YLW) TERMINAL (BLACK) (WHITE) (RED) BOARD REACTOR BLUE (BLU) RED (RED) TRADE MARK COMP. TERMINAL L2-1 L2-0 COM3 (RED) OUTDOOR AIR TEMP. SENSOR (THERMISTOR) NOISE FILTER SENSOR CN-TH1 CIRCUIT COMPLETE (WHT) AC-BLK (BLK) PIPING TEMP.
- Page 30 7.2.4 CU-S28NKV REMARKS REACTOR BLU : BLUE BLK : BLACK WHT: WHITE RED: RED YLW : YELLOW GRY: GR AY GRN: GREEN TERMINAL ORG: ORANGE BOARD Y/G : YELLOW/GREEN L2-1 L2-0 CORE ACL1 CN-BLK AC-BLK FUSE3 CORE (250V, 25A) RY-PWR2 ACN1 AC-WHT RY-C...
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Page 31: Electronic Circuit Diagram
8. Electronic Circuit Diagram Indoor Unit 8.1.1 CS-S9NKV CS-S12NKV... - Page 32 8.1.2 CS-S18NKV CS-S24NKV...
- Page 33 8.1.3 CS-S28NKV...
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Page 34: Outdoor Unit
Outdoor Unit 8.2.1 CU-S9NKV Sensor (Thermistor) Compressor Temp. Sensor Characteristics (Thermistor) Characteristics Outdoor Air Sensor Outdoor Heat Exchanger Sensor Temperature ( Temperature (... - Page 35 8.2.2 CU-S12NKV TO INDOOR UNIT REACTOR TERMINAL (BLACK) (WHITE) (RED) BOARD RAT2 RAT1 DATA (RED) OUTDOOR TEMP. SENSOR NOISE FILTER CIRCUIT AC-BLK (BLK) PIPING TEMP. COMMUNICATION SENSOR1 CIRCUIT FUSE101 (20A 250V) FUSE102 T3.15A L250V AC-WHT (WHT) (GRN) TANK TEMP. SENSOR RECTIFICATION SWITCHING POWER (GRN)
- Page 36 8.2.3 CU-S18NKV CU-S24NKV TO INDOOR UNIT REACTOR TERMINAL (BLACK) (WHITE) (RED) BOARD L2-1 L2-0 R101 R100 COM3 OUTDOOR TEMP. (RED) SENSOR NOISE FILTER CIRCUIT AC-BLK PIPING TEMP. (BLK) SENSOR1 COMMUNICATION CIRCUIT FUSE3 (20A 250V) FUSE2 T3.15A L250V SWITCHING AC-WHT POWER (WHT) SUPPLY CIRCUIT...
- Page 37 8.2.4 CU-S28NKV REACTOR TERMINAL BOARD L2-1 L2-0 CORE ACL1 CN-BLK AC-BLK FUSE3 CORE (250V, 25A) RY-PWR2 ACN1 AC-WHT RY-C CORE COMPRESSOR TERMINAL CORE CN-WHT RY-PWR1 BOARD PTC1 FUSE1 T2.5A L250V PTC2 FUSE2 COM3 T3.15A L250V SSR1 CORE OUTDOOR TEMP. SENSOR R101 R100 (15k Ohm.
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Page 38: Printed Circuit Board
9. Printed Circuit Board Indoor Unit 9.1.1 Main Printed Circuit Board 9.1.1.1 CS-S9NKV CS-S12NKV AC304 G301 AC303 RY-PWR CN-PCFM SW01 CN-FB CN-CNT CN-RMT CN-STM2 CN-STM1 CN-DISP CN-MSENS CN-TH CN-CLN... - Page 39 9.1.1.2 CS-S18NKV CS-S24NKV CS-S28NKV AC304 AC303 G301 RY-PWR SW01 CN-FM CN-CNT CN-RMT CN-STM2 CN-STM1 CN-DISP CN-MSENS CN-TH CN-CLN...
- Page 40 9.1.2 Indicator Printed Circuit Board CN-DISP 9.1.3 High Voltage Power Supply Printed Circuit Board 9.1.4 Comparator Printed Circuit Board CN-SENS1 CN-SENS2 CN-MSENS...
- Page 41 9.1.5 Human Activity Sensor Printed Circuit Board...
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Page 42: Outdoor Unit
Outdoor Unit 9.2.1 Main Printed Circuit Board 9.2.1.1 CU-S9NK... - Page 43 9.2.1.2 CU-S12NK...
- Page 44 9.2.1.3 CU-S18NK CU-S24NK...
- Page 45 9.2.1.4 CU-S28NK...
- Page 46 9.2.2 Noise Filter Printed Circuit Board 9.2.2.1 CU-S9NKV...
- Page 47 9.2.2.2 CU-S28NKV...
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Page 48: Installation Instruction
10.1.3 Indoor/Outdoor Unit Installation 10. Installation Instruction Diagram 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 49: 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*** 485 mm 82 mm 165 mm 158 mm 43 mm 95 mm... - Page 50 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 51 10.2.1 Connect the Cable to the Indoor Unit The inside and outside connection cable can be connected without removing the front grille. Connection cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 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...
- Page 52 10.2.1.1 Wire Stripping, Connecting Requirement 10.2.1.2 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.
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Page 53: 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 (ø10 mm). When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or nails. - Page 54 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 55 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.
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Page 56: 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 57: Indoor Fan Motor Operation
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 ○ ○ ○ ○ ○ • Auto Fan Speed According to room temperature and setting temperature, indoor fan speed is determined automatically. The indoor fan will operate according to pattern below. -
Page 58: Airflow Direction
11.5 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 59: Quiet Operation (Cooling Mode/Cooling Area Of Dry Mode)
CS-S9, 12NK Pattern Airflow Direction Patterns at Remote Control Vane Angle (°) 77.5 102.5 CS-S18, 24, 28NK Pattern Airflow Direction Patterns at Remote Control Vane Angle (°) 11.6 Quiet Operation (Cooling Mode/Cooling Area of Dry Mode) • Purpose To provide quiet cooling operation compare to normal operation. •... -
Page 60: Timer Control
11.8 Timer Control • There are 2 sets of ON and OFF timer is available to turn the unit ON or OFF at different preset time. • If more than one timer had been set, the upcoming timer will be display and will activated in sequence. 11.8.1 ON Timer Control ON Timer 1 and ON Timer 2 can be set using remote control, where the unit with timer set will start operation earlier... -
Page 61: Nanoe-G Operation
11.11 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 62 • nanoe-G check mode To enable nanoe-G check mode, during nanoe-G operation ON: Remote control normal mode Press continously for 15s Transmit ECO demo code and after 2 seconds return to normal mode. Transmit check code and after 2 seconds return to normal mode.
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Page 63: Mild Dry Cooling Operation
nanoe-G breakdown error Judgment method • Hi-feedback voltage (at microcontroller) supplied to the nanoe-G system when nanoe-G operation is OFF; nanoe-G breakdown error show immediately. • It is due to indoor PCB or nanoe-G high voltage power supply damage. • Operations except nanoe-G continue. -
Page 64: Auto Comfort And Eco Navi Operation
11.13 AUTO COMFORT and ECO NAVI Operation • Area of human availability, activity level and absent is judged based on pulses by using 2 infrared sensors. The internal setting temperature shift, fan speed and horizontal airflow direction are adjusted in order to provide comfort environment while maintain the energy saving level. - Page 65 • Human activity judgment is as following Signal Detection Information Log Area of Living Classification Judgment Human Position Analysis Target Area & Position Judgment Human Activity Level Judgment Setting Position Judgment 11.13.1.1 Signal Detection 120º • Human Activity sensor will turns on according to infrared sensors signal detection. Signal detection Human Activity Indicator Possible detected human...
- Page 66 11.13.1.3 Area of Living Classification Judgment • The system is able to judge area of living according to human activity database, classified as following: Living Area – In front of television, dining table, etc. Walkway – Human detection is relatively less. Non-Living Area –...
- Page 67 11.13.1.8 Setting Temperature and Fan Speed Shift • Cooling Dual Sensor To optimize energy ECONAVI saving AUTO To maximize comfort AUTO COMFORT COMFORT Heat Source & Movement High Normal None COOL/DRY Mode +2°C Set Temperature +1°C -1°C +1 tap* ≤ Medium Set Fan Speed +1 tap * For first 15 minutes or until set temperature is reached.
- Page 68 11.13.1.9 ECO NAVI and AUTO COMF Demo Mode • To enable ECO DEMO mode: Remote control normal mode Press continously for 15s Transmit ECO demo code and after 2 seconds return to normal mode. Transmit check code and after 2 seconds return to normal mode.
- Page 69 11.13.1.10 Infrared Sensor Abnormality • Abnormality detection: Connector disconnection / Wire cut abnormality o Sensor judge Hi level continuously for 25 seconds Circuit abnormality o 70 seconds after power ON, if infrared sensor judge Lo level continuously for 25 seconds •...
- Page 70 11.13.2 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 Sunlight intensity reset Judge sunlight intensity Judge ambient condition Temperature shift...
- Page 71 11.13.2.2 Judge Sunlight Intensity • Based on sunlight sensor output voltage, the sunlight intensity value will be computed and logged to sunlight intensity database. • The sunlight sensor sensitivity could be adjusted: Remote control normal mode Press & release within 10s Sensitivity Level 1: Less sensitive to sunlight intensity Default: (Battery insert) Sensitivity Level 3: Default sensitive level...
- Page 72 11.13.2.5 Sunlight Sensor Check Mode • To enable sunlight sensor check mode, during unit is OFF (power standby): Remote control normal mode Press continously for 15s Transmit ECO demo code and after 2 seconds return to normal mode. Transmit check code and after 2 seconds return to normal mode.
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Page 73: 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. •... -
Page 74: Compressor Overheating Prevention Control (For S18, S24, 28Nk Only)
12.5 Compressor Overheating Prevention Control (For S18, S24, 28NK only) • Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The changes of frequency are as below. • If compressor discharge temperature exceeds 112°C, compressor will be stopped, occurs 4 times per 20 minutes, timer LED will be blinking. -
Page 75: Outdoor Air Temperature Control
12.10 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. • Compressor frequency will adjust based on outdoor air temperature. Free 38°C 37°C... -
Page 76: Odor Cut Control
12.15 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 77: 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) Beep 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 78: 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 continuously for 10 seconds by using pointer Press “Timer Set” button unit a “beep” sound is heard as confirmation of transmission code change. Confirm setting by pressing “Timer Set”... -
Page 79: 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 80 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...
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Page 81: 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 82: 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 •... -
Page 83: 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 84 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 85 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 86 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 87 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 88 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 89 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 90 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. •...
- Page 91 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. •...
- Page 92 14.4.10 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 93 14.4.11 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 94 14.4.12 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 95 14.4.13 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 96 14.4.14 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 97 14.4.15 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 98 14.4.16 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 99 14.4.17 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 100 14.4.18 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 101 14.4.19 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 102 14.4.20 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 103 14.4.21 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 104 14.4.22 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 105 14.4.23 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. •...
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Page 106: 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-S9NK CS-S12NK 15.1.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal... - Page 107 9. Pull out the main 10. Detach 6 connectors as labeled from electronic controller the electronic controller. Then pull out controller halfway. main controller gently AC303 (WHT) RY-PWR Remove screw to remove terminal board complete. CN-FM AC304 (RED) Detach the HV+ (White) & HV- (Black) terminal wires, CN1 and GND then CN-STM2...
- Page 108 15.1.1.4 To remove control board 15. Remove 4 screws holding the control board then pull out the control board. Figure 6 15.1.1.5 To remove cross flow fan and indoor fan motor 16. Remove the screw that holding the cross flow fan and fan motor axis.
- Page 109 19. Push the holdfast to the left and lift up the evapo rator. Evaporator 21. Fan motor can be removed after the Cross flow fan removal of cross flow fan. Reminder: To reinstall the fan motor, adjust 20. Remove the cross flow fan from the unit by the fan motor connector to 45°...
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Page 110: Cs-S18Nk Cs-S24Nk Cs-S28Nk
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-S18NK CS-S24NK CS-S28NK 15.2.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 15.2.1.1... - Page 111 15.2.1.3 To remove power electronic controller 2 Hooks (left hand side) Remove the control board cover by releasing the 2 hooks. Figure 13 9. Pull out the main 10. Detach 6 connectors as labeled from electronic controller the electronic controller. Then pull out controller halfway.
- Page 112 15.2.1.4 To remove discharge grille 13. Pull out to remove the drain hose from the discharge grille 14. Then pull the discharge grille downward gently to dismantle it Figure 16 15.2.1.5 To remove control board 15. Remove 4 screws holding the control board then pull out the control board.
- Page 113 18. Remove the bearing by pulling it out gently 17. Remove the screw from the evaporator. Figure 19 19. Push the holdfast to the left and lift up the evapo rator. Evaporator 20. Remove the cross flow fan from 21. Fan motor can be removed after the the unit by pulling it to the left and removal of cross flow fan.
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Page 114: Technical Data
16. Technical Data 16.1 Operation Characteristics 16.1.1 CS-S9NKV CU-S9NKV • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 7.5m Compressor Frequency = Fc... - Page 115 • Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT), 24°C (WBT) Compressor Frequency = Fc...
- Page 116 16.1.2 CS-S12NKV CU-S12NKV • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: 7.5m Compressor Frequency = Fc...
- Page 117 • 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...
- Page 118 16.1.3 CS-S18NKV CU-S18NKV • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: Compressor Frequency = Fc...
- Page 119 • Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT), 24°C (WBT) Compressor Frequency = Fc...
- Page 120 16.1.4 CS-S24NKV CU-S24NKV • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: Compressor Frequency = Fc...
- Page 121 • 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...
- Page 122 16.1.5 CS-S28NKV CU-S28NKV • Cooling Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping length: Compressor Frequency = Fc...
- Page 123 • Piping Length Characteristic Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Outdoor temperature: 35°C (DBT), 24°C (WBT) Compressor Frequency = Fc...
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Page 124: Exploded View And Replacement Parts List124
17. Exploded View and Replacement Parts List 17.1 Indoor Unit 17.1.1 CS-S9NKV CS-S12NKV 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 125 REF. PART NAME & DESCRIPTION QTY. CS-S9NKV CS-S12NKV REMARK CHASSIS COMPLETE CWD50C1666 ← FAN MOTOR CWA921443 ← CROSS-FLOW FAN COMPLETE CWH02C1076 ← BEARING ASSY CWH64K007 ← SCREW - CROSS-FLOW FAN CWH551146 ← GENERATOR COMPLETE CWH94C0043 ← EVAPORATOR CWB30C3646 CWB30C3396 FLARE NUT (LIQUID) CWT251030 ←...
- Page 126 REF. PART NAME & DESCRIPTION QTY. CS-S9NKQ CS-S12NKQ REMARK CWG861497 ← SHOCK ABSORBER ( L ) CWG713386 ← SHOCK ABSORBER ( R ) CWG713387 ← C.C.CASE CWG567350 ← (Note) • All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488). •...
- Page 127 17.1.2 CS-S18NKV CS-S24NKV CS-S28NKV 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 128 REF. PART NAME & DESCRIPTION QTY. CS-S18NKV CS-S24NKV CS-S28NKV REMARK CHASSIS COMPLETE CWD50C1604 ← ← FAN MOTOR ARW7628AC ARW7627AC ← CROSS-FLOW FAN COMPLETE CWH02C1077 ← ← BEARING ASSY CWH64K007 ← ← SCREW - CROSS-FLOW FAN CWH551146 ← ← GENERATOR COMPLETE CWH94C0043 ←...
- Page 129 REF. PART NAME & DESCRIPTION QTY. CS-S18NKV CS-S24NKV CS-S28NKV REMARK CWG861498 ← ← SHOCK ABSORBER ( L ) CWG713402 ← ← SHOCK ABSORBER ( R ) CWG713403 ← ← C.C.CASE CWG567453 ← ← (Note) • All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488). •...
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Page 130: Outdoor Unit
17.2 Outdoor Unit 17.2.1 CU-S9NKV 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 131 REF. PART NAME & DESCRIPTION CU-S9NKV REMARK CHASSIS COMPLETE CWD50K2107 FAN MOTOR BRACKET CWD541074 SCREW - FAN MOTOR BRACKET CWH551217 FAN MOTOR CWA951734 SCREW - FAN MOTOR MOUNT CWH55252J PROPELLER FAN ASSY CWH03K1020 NUT - PROPELLER FAN CWH56053J COMPRESSOR 5RS092XCE21 ANTI - VIBRATION BUSHING CWH50077 NUT - COMPRESSOR MOUNT...
- Page 132 17.2.2 CU-S12NKV Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
- Page 133 REF. PART NAME & DESCRIPTION CU-S12NKV REMARK CHASSIS COMPLETE CWD50K2071 FAN MOTOR BRACKET CWD541030 SCREW - FAN MOTOR BRACKET CWH551217 FAN MOTOR CWA951466 SCREW - FAN MOTOR MOUNT CWH55406J PROPELLER FAN ASSY CWH03K1010 NUT - PROPELLER FAN CWH56053J COMPRESSOR 5RS092XCD21 ANTI - VIBRATION BUSHING CWH50077 NUT - COMPRESSOR MOUNT...
- Page 134 17.2.3 CU-S18NKV CU-S24NKV 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 135 REF. PART NAME & DESCRIPTION QTY. CU-S18NKV CU-S24NKV REMARK CHASSIS COMPLETE CWD52K1249 ← ANTI - VIBRATION BUSHING CWH50077 ← COMPRESSOR 5RD132XBA21 ← NUT - COMPRESSOR MOUNT CWH56000J ← SOUND PROOF MATERIAL CWG302600 ← FAN MOTOR BRACKET CWD541154 ← FAN MOTOR CWA951762 ←...
- Page 136 17.2.4 CU-S28NKV Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.
- Page 137 REF. DESCRIPTION & NAME QTY. CU-S28NKV REMARK CHASSIS COMPLETE CWD52K1230 ANTI - VIBRATION BUSHING CWH50055 PACKING CWB81043 COMPRESSOR 5KD240XAF21 NUT - COMPRESSOR MOUNT CWH561049 FAN MOTOR BRACKET CWD541126 FAN MOTOR CWA951712 SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH551040J PROPELLER FAN ASSY CWH001019...
- Page 138 REF. DESCRIPTION & NAME QTY. CU-S28NKV REMARK SHOCK ABSORBER (RIGHT) CWG712880 C.C.CASE CWG567776 (Note) • All parts are supplied from PHAAM, Malaysia (Vendor Code: 00029488). • “O” marked parts are recommended to be kept in stock. Printed in Malaysia SB0112-1...