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Panasonic CU-S12NKU-1 manual

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Table of contents for the manual

  • Page 1

    © Panasonic HA Air-Conditioni ng (M) Sdn. Bhd. 2011. Unauthorized copying and distribu tion is a violation of law. Order No: PHAAM1111084C1 Indoor Unit Outdoor Unit CS-S9NKUW-1 CS-S12NKUW-1 CS-S18NKU-1 CS-S22NKU-1 CU-S9NKU-1 CU-S12NKU-1 CU-S18NKU-1 CU-S22NKU-1 Please file and use this manual together with the service manual for Model No. CU-2S18NB[...]

  • Page 2

    2 TABLE OF CONTENTS 1. Safety Pr ecautions .............................................3 2. Specification .......................................................5 3. Location of Controls and Components ............9 3.1 Indoor Un it ....................................................9 3.2 Outdoor Unit .............................................[...]

  • Page 3

    3 1. Safety Precautions • Read the following “SAFETY PRECAUTIONS” carefully before per form any servicing. • Electrical work must be installed or servic ed by a licensed elec trician. Be sure to use the correct rating of the po we r plug a nd main circuit for the model installed. • The caution items stated here must be fo llo wed because [...]

  • Page 4

    4 WARNING 19. During installation, install the refrigerant piping properly bef ore run t he compressor. (Operation of compressor without fixing refrigeration piping and valves at opened condition will cause suck-in of air, abnormal high pressure in refrigeration c ycle and result in ex plosion, injury etc.). 20. During pump down operation, stop the[...]

  • Page 5

    5 2. S pecification Indoor CS-S9NKUW-1 CS-S12NKUW-1 Model Outdoor CU-S9NKU-1 CU-S12NKU-1 Performance Test Condition ARI ARI Phase, Hz Single, 60 Single, 60 Power Supply V 208 230 208 230 Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. kW 1.20 2.49 3.00 1.20 2.49 3.00 1.20 3.48 3.85 1.20 3.48 3.85 Capacity BTU/h 4100 8500 10200 4100 8500[...]

  • Page 6

    6 Control Device Capillary Tube Capillary Tube Refrigerant Oil cm 3 RB68A or Freol Alpha68M (320) RB68A or Freol Alpha68M (320) Refrigeration Cycle Refrigerant Type g (oz) R410A, 965 (34.1) R410A, 980 (34.6) Height(I/D / O/D) mm (inch) 290 (11-7/16) / 540 (21-9/32) 290 (11-7/16) / 540 (21-9/32) Width (I/D / O/D) mm (inch) 870 (34-9/32) / 780 (30-23[...]

  • Page 7

    7 Indoor CS-S18NKU-1 CS-S22NKU-1 Model Outdoor CU-S18NKU-1 CU-S22NKU-1 Performance Test Condition ARI ARI Phase, Hz Single, 60 Single, 60 Power Supply V 208 230 208 230 Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. kW 1.30 5.01 5.80 1.30 5.01 5.80 1.30 6.18 6.85 1.30 6.18 6.85 Capacity BTU/h 4400 17100 19800 4400 17100 19800 4400 2100[...]

  • Page 8

    8 Control Device Expansion Valve Expansion Valve Refrigerant Oil cm 3 RB68A or Freol Alpha68M (400) RB68A or Freol Alpha68M (400) Refrigeration Cycle Refrigerant Type g (oz) R410A, 1.18k (41.7) R410A, 1.37k (48.4) Height(I/D / O/D) mm (inch) 290 (11-7/16) / 795 (31-5/16) 290 (11-7/16) / 795 (31-5/16) Width (I/D / O/D) mm (inch) 1070 (42-5/32) / 875[...]

  • Page 9

    9 3. Location of Controls and Components 3.1 Indoor Unit 3.2 Outdoor Unit 3.3 Remote Control[...]

  • Page 10

    10 4. Dimensions 4.1 Indoor Unit 4.1.1 CS-S9NKUW-1 CS-S12NKUW-1[...]

  • Page 11

    11 4.1.2 CS-S18NKU-1 CS-S22NKU-1[...]

  • Page 12

    12 4.2 Outdoor Unit 4.2.1 CU-S9NKU-1 CU-S12NKU-1 4.2.2 CU-S18NKU-1 CU-S22NKU-1[...]

  • Page 13

    13 5. Refrigeration Cycle Diagram 5.1 CS-S9NKUW-1 CU-S9NKU-1 CS-S12NKUW-1 CU-S12NKU-1[...]

  • Page 14

    14 5.2 CS-S18NKU-1 CU-S18NKU-1 CS-S22NKU-1 CU-S22NKU-1[...]

  • Page 15

    15 6. Block Diagram 6.1 CS-S9NKUW-1 CU-S9NKU-1 CS-S12NKUW-1 CU-S12NKU-1[...]

  • Page 16

    16 6.2 CS-S18NKU-1 CU-S18NKU-1 CS-S22NKU-1 CU-S22NKU-1[...]

  • Page 17

    17 7. Wiring Connection Diagram 7.1 Indoor Unit 7.1.1 CS-S9NKUW-1 CS-S12NKUW-1[...]

  • Page 18

    18 7.1.2 CS-S18NKU-1 CS-S22NKU-1[...]

  • Page 19

    19 7.2 Outdoor Unit 7.2.1 CU-S9NKU-1 CU-S12NKU-1[...]

  • Page 20

    20 7.2.2 CU-S18NKU-1[...]

  • Page 21

    21 7.2.3 CU-S22NKU-1[...]

  • Page 22

    22 8. Electronic Circuit Diagram 8.1 Indoor Unit 8.1.1 CS-S9NKUW-1 CS-S12NKUW-1[...]

  • Page 23

    23 8.1.2 CS-S18NKU-1 CS-S22NKU-1[...]

  • Page 24

    24 8.2 Outdoor Unit 8.2.1 CU-S9NKU-1 CU-S12NKU-1[...]

  • Page 25

    25 8.2.2 CU-S18NKU-1[...]

  • Page 26

    26 8.2.3 CU-S22NKU-1[...]

  • Page 27

    27 9. Printed Circuit Board 9.1 Indoor Unit 9.1.1 Main Printed Circuit Board[...]

  • Page 28

    28 9.1.2 Power Printed Circuit Board 9.1.3 Indicator Prin ted Circuit Board[...]

  • Page 29

    29 9.2 Outdoor Unit 9.2.1 Main Printed Circuit Board 9.2.1.1 CU-S9NKU- 1 CU-S12NKU-1[...]

  • Page 30

    30 9.2.1.2 CU-S18NKU-1 CU-S22NKU-1[...]

  • Page 31

    31 10. Inst allation Instruction 10.1 S9NKUW-1 S12NKUW-1 10.1.1 Select the Best Location 10.1.1.1 Indoor Unit • Do not in stall the unit in excessive oil fume area such as kitchen, workshop and etc. • There sh ould not be any heat source or steam near the unit. • There sh ould not be any ob stacles bl ocking the air circulation. • A place w[...]

  • Page 32

    32 10.1.3 Indoor Unit 10.1.3.1 How to Fix Installation Plate The mounting wall shall be stron g and solid enough to prevent if from the vibratio n. The centre of installation plate sho uld be at more than c at right and left of the wall. The distance from installation plate edge to ceiling sho uld more than d . From installation plate left edge to [...]

  • Page 33

    33 10.1.3.3 Indoor Unit Installation 10.1.3.4 For the right rear piping 10.1.3.5 For the right bottom piping 10.1.3.6 For the embedded piping (This can be used for left rear pipi ng and bottom piping also.)[...]

  • Page 34

    34 10.1.3.7 Connect the Cable to the Indoor Unit 1. The inside and outside con necting cable can be connected without remo ving the front grille. 2. Unscrew the conduit cover and fix the conduit connector to conduit cover with lock nut, then secure it against chassi s. 3. Connecting wire between indoor unit and outdoor unit should be UL listed or C[...]

  • Page 35

    35 10.1.3.8 Wire Stripping and connecting requirement 10.1.3.9 Cutting and flaring the piping 1 Please cut using pipe cutter and then re move the burrs. 2 Remove the burrs by using reamer . If burrs is not removed, gas l eakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe. 3 Please make flare after inserting t[...]

  • Page 36

    36 10.1.4 Outdoor Unit 10.1.4.1 Install the Outdoor Unit • After selecting the best location, start installa tion to Indoor/Outdo or Unit Installation Diagram. 1 Fix the unit on concrete or rigid frame fi rmly and horizontally by bolt nut (ø13/32”). 2 When installing at roof, please con sider strong wind and earth quake. Please fasten the inst[...]

  • Page 37

    37 10.1.4.2.4 Gas leak checking Pressure test to system to 400 PSIG with dry nitr ogen, in stages. Thoro ughly leak check the system. If the pressure holds, release the nitrogen and proceed to section 1 0.1.4.3. 10.1.4.3 Evacuation of the equipment When installing an air conditioner, be sure to evacuate the air inside the indoor unit and pipes in t[...]

  • Page 38

    38 9. Secure the wire onto the control boa rd with the holder (clamper). 10. After completing wiring connections, reattach the control board cover (Metal and Resin) and the top panel to the original position with the screws. 11. For wire stripping and connectio n requirement, refer to instruction g of indoor unit. This equipment must be properly ea[...]

  • Page 39

    39 10.2 S18NKU-1 S22NKU-1 10.2.1 Select the Best Location 10.2.1.1 Indoor Unit • Do not install the unit in excessive oil fume areas such as kitch ens, worksho ps etc. • There should not be any heat source or steam near the unit. • There should not be any ob stacles blocki ng the air circulation. • A place where air circulation in the room [...]

  • Page 40

    40 10.2.3 Indoor Unit 10.2.3.1 How to Fix Installation Plate The mounting wall must be strong and solid enough to prevent if from the vibration. The centre of installation plate sho uld be at more than c at right and left of the wall. The distance from installation plate edge to ceiling sho uld more than d . From installation plate left edge to uni[...]

  • Page 41

    41 10.2.3.3 Indoor Unit Installation 10.2.3.4 For the right rear piping 10.2.3.5 For the right bottom piping 10.2.3.6 For the embedded piping (This can be used for left rear pipi ng and bottom piping also.)[...]

  • Page 42

    42 10.2.3.7 Connect the Cable to the Indoor Unit 1. The inside and outside con necting cable can be connected without remo ving the front grille. 2. Unscrew the conduit cover and fix the conduit connector to conduit cover with lock nut, then secure it against chassi s. 3. Connecting wire between indoor unit and outdoor unit should be UL listed or C[...]

  • Page 43

    43 10.2.3.8 Wire Stripping and connecting requirement 10.2.3.9 Cutting and flaring the piping 1 Please cut using pipe cutter and then re move the burrs. 2 Remove the burrs by using reamer . If burrs is not removed, gas l eakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe. 3 Please make flare after inserting t[...]

  • Page 44

    44 10.2.4 Outdoor Unit 10.2.4.1 Install the Outdoor Unit • After selecting the best location, start installa tion to Indoor/Outdo or Unit Installation Diagram. 1 Fix the unit on concrete or rigid frame fi rmly and horizontally by bolt nut (ø13/32”). 2 When installing at roof, please con sider strong wind and earth quake. Please fasten the inst[...]

  • Page 45

    45 10.2.4.3 Evacuation of the equipment When installing an air conditioner, be sure to evacuate the air inside the indoor unit and pipes in the following procedures. 1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-wa y valve. 2. Connect the micron gauge between vacuum pump an d service port[...]

  • Page 46

    46 9. Secure the wire onto the contro l board with the holder (cla mper). 10. After completing wiring connections, reattach the particular plate an d control board cover (metal and resin ) to the original position with the screws. 11. For wire stripping and connectio n requirement, refer to instruction g of indoor u nit. This equipment must be prop[...]

  • Page 47

    47 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 fo r maximum comfort always. In order to achieve the suitabl e operation mode, the microcomputer maintains the set temperatur e by measuring the tempera[...]

  • Page 48

    48 11.2 Indoor Fan Motor Operation 11.2.1 Basic Rotation Speed • Manual Fan Speed o Fan motor’s number of rotation is determ ined according to remote control setting. Remote control ○ ○ ○ ○ ○ Tab Hi Me+ Me Me- Lo • Auto Fan Speed o According to room temperature an d setting temperature, indoor fan speed is det ermined automatically.[...]

  • Page 49

    49 11.5.1 Vertical Airflow Vane Angle (°) Operation Mode Airflow Direction 1 2 3 4 5 Auto 20 ~ 45 Cooling Manual 20 26 32 37 45 Auto 20 ~ 45 Soft Dry Manual 20 26 32 37 45 • Automatic vertical airflow direction can be set using re mote control; the vane swings up and down withi n the angles as stated above. It does not swing during fan moto r st[...]

  • Page 50

    50  When quiet operation is stoppe d, operation is sh ifted to normal operation with previous setting .  When fan speed is changed, quiet ope ration is sh ifted to quiet operation of the new fan speed.  When operation mode is changed, quiet operation is shifted to quiet operation of the new mode.  During quiet operation, if ON timer ac [...]

  • Page 51

    51 11.10 Indication Panel LED POWER TIMER QUIET POWERFUL Color Green Orange Orange Orange Light ON Operation ON Timer Setting ON Quiet Mode ON Powerful Mode ON Light OFF Operation OFF Timer Setting OFF Quiet Mode OFF Powerful Mode OFF Note: • If POWER LED blinks, the possible operation of the uni t is operation mode judg ment, or ON timer samplin[...]

  • Page 52

    52 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 re mote control within this p eriod. • This control is not applicable if the power supply is cut off and on again. • Th[...]

  • Page 53

    53 12.4.2 S18NK, S22NK • Overheating Prevention Control o When the IPM temperature rises to 212°F, compressor operation w ill stop immediately. o Compressor operation rest arts after 3 minut es the temperatu re decreases to 203°F. • DC Peak Current Control o When electric current to IPM exceeds set value of 29.9A, the compressor will st op op[...]

  • Page 54

    54 12.9 Outdoor Air Temperature Control • The compressor operating frequency is regulated in a cco rdance to the outdoor air temperature as shown in the diagram below. • This control will begin 1 minute after the compressor start s. • Compressor f requency will adjust based on outdoor air temperature. 12.10 Cooling Overload Control • Pipe t[...]

  • Page 55

    55 13. Servicing Mode 13.1 Auto Off/On Button Auto OFF/ON Button Pressed Auto OF F/ON Button Pressed 5 sec Auto Operation Test Run Operation (Forced Cooling Operation) Stop 1 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 wi th limite[...]

  • Page 56

    56 13.2 Remote Control Button 13.2.1 SET Button • To check remote control transmission co de and store the transmission code to EEPROM o Press “Set” button continu ously for 10 seconds by usi ng pointer o Press “Timer Set” button unit a “beep ” sound is heard as confirmati on of transmission code ch ange. 13.2.2 RESET (RC) • To clea[...]

  • Page 57

    57 14. T roubleshooting Guide 14.1 Refrigeration Cycle System In order to diagnose malfunctions, ensu re the air conditioner is free from electrical problems bef ore inspecting the refrigeration cycle. Such problems include in sufficient insulation, problem with the power source, malfunction of a compressor a nd a fan. The normal outlet air tempera[...]

  • Page 58

    58 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 oper ation Insufficient refrigerant (gas leakage) Ô Ô Ô Clogged capillary tube or strainer Ô Ô Ô Short circuit in the indoor unit Ô Ô Ô Heat r[...]

  • Page 59

    59 14.2 Breakdown Self Diagnosis Function 14.2.1 Self Diagnosis Function (Thr ee Digits Alphanumeric Code) • Once error occurred during operation, the uni t will stop its operation, and Timer LED blinks. • Although Timer LED goes off when power supply is turn ed off, if the unit is ope rated under a breakdown condition, the LED will ON again. ?[...]

  • Page 60

    60 14.3 Error Code Table Diagnosis display Abnormality / Protecti on control Abnormality Judgment Emergency Operation Primary location to v erify H00 No abnormality detected - Normal operation H11 Indoor / Outdoor abnormal communication > 1 min after starting operation Indoor fan operation only • Internal / external cable connection • Indoor[...]

  • Page 61

    61 14.4 Troubleshooting Flowchart 14.4.1 H11 (Indoor/Outdoor Abnormal Communication) Malfunction Decision Conditions • During startup and operation of cooling and heating, t he data received from outdoor unit in ind oor unit signal transmission is checked whether it is no rmal. Malfunction Caused • Faulty indoor unit PCB. • Faulty outdoor uni[...]

  • Page 62

    62 14.4.2 H12 (Indoor/Outdoor Cap acity Rank Mismatched) Malfunction Decision Conditions • During startup, error code appears wh en different ty pes of indoor and outdoor units are inte rconnected. Malfunction Caused • Wrong models interconnected. • Wrong indoor unit or outdoor unit PCBs mounted. • Indoor unit or outdoor unit PCBs defective[...]

  • Page 63

    63 14.4.3 H14 (Indoor Intake Air Temp erature Sensor Abnormality) Malfunction Decision Conditions • During startup and operation of cooling and heating, t he temperatures detected by the indoor intake ai r temperature sensor are used to determine sensor e rrors. Malfunction Caused • Faulty conne ctor conn ection. • Faulty sensor. • Faulty P[...]

  • Page 64

    64 14.4.4 H15 (Compressor Temper ature Sensor Abnormality) Malfunction Decision Conditions • During startup and operation of cooling and heating, t he temperatures detected by the outdoor com pressor temperature sensor are used to determine sensor e rrors. Malfunction Caused • Faulty conne ctor conn ection. • Faulty sensor. • Faulty PCB. Tr[...]

  • Page 65

    65 14.4.5 H16 (Outdoor Current Transformer Open Circuit) Malfunction Decision Conditions • A current transformer (CT) is detected by checking the compressor runnin g frequency ( ≥ rated frequency) and CT detected input current (less than 1.14A) for continuou sly 20 seconds. Malfunction Caused • CT defective • Outdoor PCB defective • Compr[...]

  • Page 66

    66 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 67

    67 14.4.7 H23 (Indoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions • During startup and operation of cooling and heating, t he temperatures detected by the indoor heat exch anger temperature sensor are used to determine sensor e rrors. Malfunction Caused • Faulty conne ctor conn ection. • Faulty sensor. • Faulty PCB.[...]

  • Page 68

    68 14.4.8 H27 (Outdoor Air Temper ature Sensor Abnormality) Malfunction Decision Conditions • During startup and operation of cooling and heating, the temperatures detected by the outdoor air tempe rature sensor are used to determine sensor errors. Malfunction Caused • Faulty conne ctor conn ection. • Faulty sensor. • Faulty PCB. Troublesho[...]

  • Page 69

    69 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 temp erature sensor are used to determine sensor errors. Malfunction Caused • Faulty conne ctor conn ection. • Faulty sensor. • Faulty PCB. Troublesh[...]

  • Page 70

    70 14.4.10 H30 (Compressor Discharge Temperature Sensor Abnormalit y ) Malfunction Decision Conditions • During startup and operation of cooling and heating, t he temperatures detected by the outdoo r discharge pipe temperature sensor are used to determine sensor e rrors. Malfunction Caused • Faulty conne ctor conn ection. • Faulty sensor. ?[...]

  • Page 71

    71 14.4.11 H33 (Unspecified Volt age between Indoor and Outdoor) Malfunction Decision Conditions • The supply power is detected for its requir em ent 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. Troubleshoot[...]

  • Page 72

    72 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. • Operation stops due to breaking of wire insi[...]

  • Page 73

    73 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 p ipe temperature sensor is above 140°F. Malfunction Caused • Clogged air filter of the indoor unit • Dust accumulation on [...]

  • Page 74

    74 14.4.14 H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry) Malfunction Decision Conditions • Freeze prevention control takes place (when indoor pi pe temperature is lower than 35.6°F) Malfunction Caused • Clogged air filter of the indoor unit • Dust accumulation on the indoor unit heat exchanger • Air short circuit • Detec[...]

  • Page 75

    75 14.4.15 F11 (Indoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions • When cooling operation, when indoor pipe tempe rature or indoor heat exchanger temperature sensor is above 113°F. Malfunction Caused • Faulty conne ctor conn ection. • Faulty indoor pipe temperature sensor. • Faulty indoor main PCB. Troubleshootin[...]

  • Page 76

    76 14.4.16 F90 (Power Fact or Correction Protection) Malfunction Decision Conditions • During startup and operation of cooling and heating, when Power Factor Co rrection (P FC) protection circuitry at the outdoor unit main PCB senses abnormal high DC voltage level. Malfunction Caused • DC voltage peak due to power supply su rge. • DC voltage [...]

  • Page 77

    77 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 < 39.2 °F. Malfunction Caused • Refrigerant shortage (refrigerant leakage) • Po[...]

  • Page 78

    78 14.4.18 F93 (Compressor Rotation Failure) Malfunction Decision Conditions A compressor rotation failure is detected by checkin g the compressor running condition throug h the position detection circuit. Malfunction Caused • Compressor terminal disconnect • Outdoor PCB malfunction Troubleshooting[...]

  • Page 79

    79 14.4.19 F95 (Cooling High Pressure Abnormality) Malfunction Decision Conditions During operation of cooli ng, when outdoor unit heat e xchanger high temperature data (141.8°F) 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 [...]

  • Page 80

    80 14.4.20 F96 (IPM Overheating) Malfunction Decision Conditions During operating of cooli ng and heating, when IPM temper ature data (212° F) 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 du[...]

  • Page 81

    81 14.4.21 F97 (Compressor Overheating) Malfunction Decision Conditions During operation of cooli ng and heating, when compre ssor tank temperature data (233.6°F) is detected by the compressor tank temperature sen sor. Malfunction Caused • Refrigerant shortage (refrigerant leakage). • 2/3 way valve closed. • Detection error due to faulty com[...]

  • Page 82

    82 14.4.22 F98 (Input Over Current Detection) Malfunction Decision Conditions During cooling and heating operatio n, when an input over-curr ent (16.8A) is detected by checking the input current value being detected by current tran sforme r (CT) with the compressor running. Malfunction Caused • Over-current due to compressor failure. • Over-cur[...]

  • Page 83

    83 14.4.23 F99 (Output O ver Current Detection) Malfunction Decision Conditions During operation of cooli ng and heating, when an output over-cur rent (18.5A) is detecte d 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 transi [...]

  • Page 84

    84 WA RN ING 15. Disassembly an d Assembly Instructions High Voltage is generated in the electrical parts area by the capacitor. Ensure that t he capac itor has discharged sufficiently before proceeding with repair work. Failure to heed this cauti on may result in electric shocks. 15.1 Indoor Electronic Controllers, Cro ss Flow Fan and Indoor Fan M[...]

  • Page 85

    85 15.1.1.2 To remove discharge grille[...]

  • Page 86

    86 15.1.1.3 To remove control board 15.1.1.4 To remove cross flow fan and indoor fan motor[...]

  • Page 87

    87[...]

  • Page 88

    88 16. T echnical Dat a 16.1 Operation Characteristics 16.1.1 CS-S9NKUW-1 CU-S9NKU-1 • Cooling Characteristic o Room temperature: 81°F (DBT), 66°F (WBT) o Operation condition: High fan speed o Piping length: 24.6ft o Compressor Freq: Fc[...]

  • Page 89

    89 • Piping Length Characteristic o Room temperature: 81°F (DBT), 66°F (WBT) o Operation condition: High fan speed o Outdoor temperature: 95°F (DBT) o Compressor Freq: Fc[...]

  • Page 90

    90 16.1.2 CS-S12NKUW-1 CU-S12NKU-1 • Cooling Characteristic o Room temperature: 81°F (DBT), 66°F (WBT) o Operation condition: High fan speed o Piping length: 24.6ft o Compressor Freq: Fc[...]

  • Page 91

    91 • Piping Length Characteristic o Room temperature: 81°F (DBT), 66°F (WBT) o Operation condition: High fan speed o Outdoor temperature: 95°F (DBT) o Compressor Freq: Fc[...]

  • Page 92

    92 16.1.3 CS-S18NKU- 1 CU-S18NKU-1 • Cooling Characteristic o Room temperature: 81°F (DBT), 66°F (WBT) o Operation condition: High fan speed o Piping length: 16.4ft o Compressor Freq: Fc[...]

  • Page 93

    93 • Piping Length Characteristic o Room temperature: 81°F (DBT), 66°F (WBT) o Operation condition: High fan speed o Outdoor temperature: 95°F (DBT) o Compressor Freq: Fc[...]

  • Page 94

    94 16.1.4 CS-S22NKU- 1 CU-S22NKU-1 • Cooling Characteristic o Room temperature: 81°F (DBT), 66°F (WBT) o Operation condition: High fan speed o Piping length: 16.4ft o Compressor Freq: Fc[...]

  • Page 95

    95 • Piping Length Characteristic o Room temperature: 81°F (DBT), 66°F (WBT) o Operation condition: High fan speed o Outdoor temperature: 95°F (DBT) o Compressor Freq: Fc[...]

  • Page 96

    96 17. Exploded View and Replacement Part s List 17.1 Indoor Unit 17.1.1 CS-S9NKUW-1 CS-S12NKUW-1 Note The above exploded view is for the purp os e of parts disassembly and replaceme nt. The non-numbered pa rts are not kept as standard service parts.[...]

  • Page 97

    97 REF. NO. P A RT NAME & DESCRIPTI ON QTY. CS-S9NKUW-1 CS-S12NKUW-1 REMARK 1 CHASSIS COMPLETE 1 CWD50C163 3 ← 2 FAN MOTOR 1 L6CBYYYL0055 ← O 3 CROSS-FLOW FAN COMPLETE 1 CWH02C1076 ← 4 BEARING ASSY 1 CWH64K007 ← 5 SCREW - CROSS-FLOW FAN 1 CWH551146 ← 7 EVAPORATOR 1 CWB30C3181 CWB30C3182 8 FLARE NUT (LIQUID) 1 CWT251030 ← 9 FLARE NUT[...]

  • Page 98

    98 17.1.2 CS-S18NKU-1 CS-S22NKU-1 Note The above exploded view is for the purp os e of parts disassembly and replaceme nt. The non-numbered pa rts are not kept as standard service parts.[...]

  • Page 99

    99 REF. NO. P A RT NAME & DESCRIPTI ON QTY. CS-S18NKU-1 CS-S22NKU-1 REMARK 1 CHASSIS COMPLETE 1 CWD50C163 7 ← 2 FAN MOTOR 1 L6CBYYYL0056 ← O 3 CROSS-FLOW FAN COMPLETE 1 CWH02C1077 ← 4 BEARING ASSY 1 CWH64K007 ← 5 SCREW - CROSS-FLOW FAN 1 CWH551146 ← 7 EVAPORATOR 1 CWB30C3771 CWB30C3772 8 FLARE NUT (LIQUID) 1 CWT251030 ← 9 FLARE NUT [...]

  • Page 100

    100 17.2 Outdoor Unit 17.2.1 CU-S9NKU-1 CU-S12NKU-1 Note The above exploded view is for the purp os e of parts disassembly and replaceme nt. The non-numbered pa rts are not kept as standard service parts.[...]

  • Page 101

    101 REF. NO. PA RT NAME & DESCRIPTION QTY. CU-S9NKU-1 CU-S12N KU-1 REMARK 1 CHASSIS ASSY 1 CWD50K2206A ← 2 FAN MOTOR BRACKET 1 CWD541030 ← 3 SCREW - FAN MOTOR BRACKET 2 CWH551217 ← 4 FAN MOTOR 1 CWA951466 ← O 5 SCREW - FAN MOTOR MOUNT 4 CWH55406J ← 6 PROPELLER FA N ASSY 1 CWH03K1010 ← 7 NUT - PROPELLER FAN 1 CWH56053J ← 8 COMPRESS[...]

  • Page 102

    102 17.2.2 CU-S18NKU-1 CU-S22NKU-1 Note The above exploded view is for the purp os e of parts disassembly and replaceme nt. The non-numbered pa rts are not kept as standard service parts.[...]

  • Page 103

    103 REF. NO. PA RT NAME & DESCRIPTION QTY. CU-S18NKU-1 CU-S22NKU-1 REMARK 1 CHASSIS ASSY 1 CWD52K1227A ← 2 ANTI - VIBRATION BUSHING 3 CWH50077 ← 3 COMPRESSOR 1 5CS130XAD04 ← O 4 NUT - COMPRESSOR MOUNT 3 CWH56000J ← 5 FAN MOTOR BRACKET 1 CWD541126 ← 6 FAN MOTOR 1 CWA951686 ← O 7 SCREW - FAN MOTOR BRACKET 2 CWH551217 ← 8 SCREW - FAN[...]