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Panasonic CS-NZ12SKE Service Manual

Other manuals for CS-NZ12SKE: Operating Instructions Manual

Summary of CS-NZ12SKE

  • Page 1

    © panasonic corporation 2016 order no: papamy1607071ce indoor unit outdoor unit cs-nz9ske cs-nz12ske cs-qz9ske cu-nz9ske cu-nz12ske cu-qz9ske destination north europe caution r32 refrigerant – this air conditioner contains and operates with refrigerant r32. This product must only be installed or ser...

  • Page 2: Table of Contents

    2 table of contents page page 1. Safety precautions ............................................. 3 2. Precaution for using r32 refrigerant .............. 6 3. Specifications ................................................... 10 4. Features .............................................................

  • Page 3: 1. Safety Precautions

    3 1. Safety precautions  read the following “safety precautions” carefully before perform any servicing.  electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model installed.  the caution items state...

  • Page 4

    4 warning 13. Do not perform flare connection inside a building or dwelling or room, when joining the heat exchanger of indoor unit with interconnecting piping. Refrigerant connection inside a building or dwelling or room must be made by brazing or welding. Joint connection of indoor unit by flaring...

  • Page 5

    5 caution 5. Do not touch the sharp aluminium fin, sharp parts may cause injury. 6. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the furniture. 7. Select an installation location which is easy for maintenance. In...

  • Page 6

    6 warning caution 2. Precaution for using r32 refrigerant  the basic installation work procedures are the same as conventional refrigerant (r410a, r22) models. However, pay careful attention to the following points: 1. Since the working pressure is higher than that of refrigerant r22 models, some o...

  • Page 7

    7 caution 2-5. No ignition sources no person carrying out work in relation to a refrigeration system which involves exposing any pipe work that contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion. He/she...

  • Page 8

    8 caution 7. Leak detection methods electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity may not be adequate, or may need re- calibration. (detection equipment shall be calibrated in a refrigerant-free area.) ensure that the detector is not a potential source...

  • Page 9

    9 caution 11. Labelling equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant. The label shall be dated and signed. Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant. 12. Recovery when removing refrigerant fro...

  • Page 10: 3. Specifications

    10 3. Specifications model indoor cs-nz9ske cs-nz12ske outdoor cu-nz9ske cu-nz12ske performance test condition eurovent eurovent power supply phase, hz single, 50 single, 50 v 230 230 min. Mid. Max. Min. Mid. Max. Cooling capacity kw 0.85 2.50 3.00 0.85 3.50 4.00 btu/h 2900 8530 10200 2900 11900 136...

  • Page 11

    11 model indoor cs-nz9ske cs-nz12ske outdoor cu-nz9ske cu-nz12ske compressor type hermetic motor (rotary) hermetic motor (rotary) motor type brushless (4-poles) brushless (4-poles) output power w 900 900 indoor fan type cross-flow fan cross-flow fan material asg20k1 asg20k1 motor type dc / transisto...

  • Page 12

    12 model indoor cs-nz9ske cs-nz12ske outdoor cu-nz9ske cu-nz12ske piping pipe diameter (liquid / gas) mm (inch) 6.35 (1/4) / 9.52 (3/8) 6.35 (1/4) / 9.52 (3/8) standard length m (ft) 5.0 (16.4) 5.0 (16.4) length range (min – max) m (ft) 3 (9.8) ~ 20 (65.6) 3 (9.8) ~ 20 (65.6) i/d & o/d height differ...

  • Page 13

    13 model indoor cs-qz9ske outdoor cu-qz9ske performance test condition eurovent power supply phase, hz single, 50 v 230 min. Mid. Max. Cooling capacity kw 0.85 2.50 3.00 btu/h 2900 8530 10200 kcal/h 730 2150 2580 running current a – 2.45 – input power w 170 510 700 annual consumption kwh – 255 – eer...

  • Page 14

    14 model indoor cs-qz9ske outdoor cu-qz9ske compressor type hermetic motor (rotary) motor type brushless (4 poles) output power w 900 indoor fan type cross-flow fan material asg20k1 motor type dc / transistor (8-poles) input power w 47.3 output power w 40 speed qlo cool rpm 600 heat rpm 620 lo cool ...

  • Page 15

    15 model indoor cs-qz9ske outdoor cu-qz9ske piping pipe diameter (liquid / gas) mm (inch) 6.35 (1/4) / 9.52 (3/8) standard length m (ft) 5.0 (16.4) length range (min – max) m (ft) 3 (9.8) ~ 20 (65.6) i/d & o/d height different m (ft) 10.0 (32.8) additional gas amount g/m (oz/ft) 10 (0.1) length for ...

  • Page 16: 4. Features

    16 4. Features  inverter technology o wider output power range o energy saving o quick cooling o quick heating o more precise temperature control  environment protection o non-ozone depletion substances refrigerant (r32)  long installation piping o long piping up to 20 meters during single split ...

  • Page 17

    17 5. Location of controls and components 5.1 indoor unit timer +8/15°c heat deice front panel air filters auto off/on button use when remote control is misplaced or a malfunction occurs. Vertical airflow direction louver do not adjust by hand. Horizontal airflow direction louver manually adjustable...

  • Page 18: 6. Dimensions

    18 6. Dimensions 6.1 indoor unit (194) 919 295 2 ±0.5 2 ±0.5 194 45 61 60 60 139 149 (41-61) 590 16.4 264.6 unit: mm b a c pipe hole center pipe hole center 128mm to pipe hole center 128mm to pipe hole center 496.6 128 266 266 128 right piping hole left piping hole installation plate indoor unit ext...

  • Page 19

    19 6.2 outdoor unit (23) 69 61 622 298 37 space necessary for installation anchor bolt pitch 330 x 540 unit: mm 2-way valve at liquid side (high pressure) 3-way valve at gas side (low pressure) 100 cm 10 cm 10 cm 540 21.9 (124) 68.5 823.4 97 167 330 32 53.4 160

  • Page 20

    20 7. Refrigeration cycle diagram indoor outdoor intake air temp. Sensor air temp. Sensor pipe temp. Sensor 1 pipe temp. Sensor 2 tank sensor pipe temp. Sensor liquid side 2-way valve 3-way valve gas side cooling heat exchanger (evaporator) heating compressor 4-ways valve condenser muffler muffler s...

  • Page 21: 8. Block Diagram

    21 8. Block diagram ic19 fuse101 ms 3 ~ react or ms 3 ~ noise filter fuse103 single phase power suppl y fuse104 c103 4-w a ys va lv e sc th1 u ntc ct101 r y -pwr r y -ac ptc ptc1 3 2 1 l n (indoor unit) (outdoor unit) outdoor power suppl y connection single phase power suppl y 1Ø 230v 50hz indoor po...

  • Page 22

    22 9. Wiring connection diagram 9.1 indoor unit tº tº tº m m m remarks: b: blue p: pink br: brown o: orange bl: black y: yellow w: white g: green r: red gr: gray y/g: yellow/green l n l n 1 2 3 cn-th (red) cn-disp (wht) cn-disp (ylw) cn-rcv (ylw) cn-rcv (wht) cn-fm (wht) g301 (grn) ac306 (blk) ac306...

  • Page 23

    23 9.2 outdoor unit tº tº tº electronic controller reactor m ms 3~ ms 3~ fuse 104 t3.15a l250v fuse 103 (20a 250v) switching power supply circuit communication circuit rectification circuit noise filter circuit pfc circuit rectification circuit fuse 101 t3.15a l250v remarks: black: (blk) blue: (blu)...

  • Page 24

    24 10. Electronic circuit diagram 10.1 indoor unit tº tº tº m m m l n l n 1 2 3 cn-th (red) cn-disp (wht) cn-disp (ylw) cn-rcv (ylw) cn-rcv (wht) cn-fm (wht) g301 (grn) ac306 (blk) ac306 (black) acn501 (gray) acl501 (brown) acn502 (white) ac303 (wht) ac304 (red) (sw01) fuse301 t3.15a l250v electroni...

  • Page 25

    25 10.2 outdoor unit sensor (thermistor) characteristics 70 60 50 40 30 20 10 0 -10 0 10 temperature ( o c) resistance (kΩ) 20 30 40 50 1 2 1 2 outdoor air sensor outdoor heat exchanger sensor compressor temp. Sensor (thermistor) characteristics 70 60 50 40 30 20 10 0 20 40 60 temperature ( o c) res...

  • Page 26: 11.  Printed Circuit Board

    26 11. Printed circuit board 11.1 indoor unit 11.1.1 main printed circuit board ac303 cn-stm1 cn-stm3 cn-rcv cn-disp cn-rmt cn-th jp1 (random auto restart enable/disable) cn-cnt cn-fm.

  • Page 27

    27 11.1.2 indicator printed circuit board led201 led203 led206 led204 led202 led205 cn-disp 11.1.3 receiver printed circuit board cn-rcv 11.1.4 sub printed circuit board acn502 acn501 acl501 ac306.

  • Page 28

    28 11.2 outdoor unit cn-hot cn-stm cn-th1 cn-mtr1 cn-mtr2 cn-tank ac-blk data ac-wht power transistor (ipm) current transformer (ct).

  • Page 29: 12. Installation

    29 12. Installation instruction 12.1 select the best location 12.1.1 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.  there should not be any obstacles blocking the air circulation.  a...

  • Page 30

    30 12.2 indoor unit 12.2.1 how to fix installation plate the mounting wall shall be strong and solid enough to prevent it from vibration. 3 4 b a c 5 6 wall wall wall installation plate 1 2 screw more than 1 more than 1 indoor unit 266 mm 128 mm more than 2 for best strength of indoor unit installat...

  • Page 31

    31 12.2.3 indoor unit installation ● do not turn over the unit without it’s shock absorber during pull out the piping. It may cause intake grille damage. ● use shock absorber during pull out the piping to protect the intake grille from damage. Intake grille piping pull ou t th e p ipin g piping shoc...

  • Page 32

    32 • how to pull the piping and drain hose out, in case of the embedded piping. • in case of left piping how to insert the connection cable and drain hose. Rear view for left piping installation drain cap drain hose adjust the piping slightly downwards. Drain hose connection cable pvc tube for drain...

  • Page 33

    33 9 remove the tapes and connect the power supply cord and connection cable between indoor unit and outdoor unit according to the diagram below. Terminals on the outdoor unit l n 1 2 3 colour of wires (connection cable) terminals on the indoor unit l n 1 2 3 (power supply cord) terminals on the iso...

  • Page 34

    34 terminal board control board recommended length (mm) tape earth wire longer than others ac wires for safety reason holder indoor & outdoor connection cable outdoor unit recommended length (mm) a b c d 50 40 35 60 connection cable 6 secure the connection cable onto the control board with the holde...

  • Page 35

    35 12.3 outdoor unit 12.3.1 install the outdoor unit  after selecting the best location, start installation to indoor/outdoor unit installation diagram. 1 fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm). 2 when installing at roof, please consider strong wind and...

  • Page 36

    36 air purging method is prohibited for r32 system 12.3.3 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. Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation. ...

  • Page 37

    37 12.3.3.1 cutting and flaring the piping 1 please cut using pipe cutter and then remove the burrs. 2 remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe. 3 please make flare after inserting the f...

  • Page 38

    38 in case of outdoor power supply 3 cable connection to the power supply through isolating devices (disconnecting means). O connect approved type polychloroprene sheathed power supply cord 3 x 1.5 mm 2 type designation 60245 iec 57 or heavier cord to the terminal board, and connect the others end o...

  • Page 39

    39 12.3.6 how to take out front grille please follow the steps below to take out front grille if necessary such as when servicing. 1 set the vertical airflow direction louvers to the horizontal position. 2 remove the 2 caps on the front grille as shown in the illustration at right, and then remove t...

  • Page 40

    40 12.3.10 check the drainage  open front panel and remove air filters. (drainage checking can be carried out without removing the front grille.)  pour a glass of water into the drain tray-styrofoam.  ensure that water flows out from drain hose of the indoor unit. Drain tray-styrofoam 12.3.11 eva...

  • Page 41

    41 13. Installation and servicing air conditioner using r32 13.1 about r32 refrigerant for air conditioning refrigerants such as r410a, the refrigerants were collected back in order to prevent their air dissipation, to curbe the global warming impact, in case they were released into the atmosphere. ...

  • Page 42

    42 2. Characteristic of pressure as shown in table 2, r32 does not have much difference in vapor pressure at the same refrigerant temperature comparing to r410a, but comparing to r22, it is higher at 1.6 times more. Thus, the same as in case of r410a, it is necessary to do installation and service u...

  • Page 43

    43 13.3 refrigerant piping installation • tools used in services 13.3.1 required tools r32 refrigerant air conditioners use the common parts as r410a air conditioners for two-way valves and three-way valves (diameters of service ports); thus, they maintain commonality in the maintenance of the compr...

  • Page 44

    44 3. Torque wrenches (diameters 1/2, 5/8) in order to strengthen the compressive strength, the diameters of wrenches change depending on the flare nut sizes. Torque wrenches differences in torque wrenches r32 (common r410a) r22 1/2 (diameter × torque) 26 mm × 55 n•m (550 kgf•m) 24 mm × 55 n•m (550 ...

  • Page 45

    45 7. Hfc refrigerant_electric gas leakage tester r32 refrigerant is often used for other mixed refrigerant (r410a, r404a, r407c etc.). Therefore, the usage of existing hfc detectors is possible, but in order to detect more accurately, we recommend to use detectors specially set and adjusted for r32...

  • Page 46

    46 11. Tools used for refrigerant piping installations and services tools for r410a common with r32 possibility of usage for r22 1. Pipe cutters, reamers or scrapers ○ ○ 2. Flare tools (clutch type) ○ ○ 3. Torque wrench (1/4, 3/8) ○ ○ 4. Torque wrench (1/2, 5/8) ○ × 5. Manifold gauges・charging hoses...

  • Page 47

    47 13.4 new installation, relocation, repairing of refrigerant cycle system the procedures operation testing new installation relocation repairing refrigerant cycle pump down refrigerant recovery prevention of impurity leakage checking insertion of refrigerant • dismantling indoor / outdoor units • ...

  • Page 48

    48 13.5 piping installation of r32 13.5.1 pipe materials used and flaring copper pipes are used for refrigerant piping. Pipes which comply with jis regulations need to be used. Room air conditioners which use r410a and r32 have higher pressure; thus, using pipes which comply with the regulations is ...

  • Page 49

    49 13.6 installation, relocation, and service 13.6.1 air purge and gas leak test for new installation (using new refrigerant pipes) using vacuum pump (from the point of view of global environment protection, do not release cfcs into the atmosphere during installation work) 1. Connect the charging ho...

  • Page 50

    50 13.6.2 process of refrigerant recovery 1. Connect the center charging hose of manifold gauge to the in-let side of recovery device. 2. Connect the valves of the discharge side of recovery device and liquid side of refrigerant cylinder with red hose (charging hose). 3. Connect the yellow float swi...

  • Page 51

    51 13.6.3 relocation 1. Removing the air conditioning unit a) recovery of outdoor unit refrigerant by pumping down press “forced cooling button” (as a general rule, since 1998 the name of cooling testing button is changed, and this name is unified within the air conditioning industry), and then you ...

  • Page 52

    52 13.6.6 re-insertion of refrigerant in service when re-insertion is needed, follow the procedures to ensure the insertion of new refrigerant at correct amount. 1. Attach charging hose (blue) to the service port of the outdoor unit. 2. Attach charging hose (red) to the vacuum pump. Fully open the 2...

  • Page 53

    53 13.7 repairing of refrigerant cycle / brazing point 13.7.1 preparation for repairing of refrigerant cycle / brazing brazing which is a technique needed for repairing refrigerant cycle requires advanced technique and experience, and this brazing procedure can only be performed by the workers who c...

  • Page 54

    54 2. Cylinder without adjustment valve 2 nd side gauge pressure is adjusted by the adjuster. Check the both side valves of the torch and open the cylinder valve to check the remaining refrigerant in the cylinder. Caution: do not attach oil component on the connection port of the adjuster. Especiall...

  • Page 55

    55 13.7.5 types of flame types of flame change based on the proportion of propane and oxygen. [neutral flame] perform brazing with this flame (this is a flame when oxygen and propane are mixed at proper proportion, and has lesser effect on the brazed metals) white core flame 10 ~ 15 mm outer flame (...

  • Page 56

    56 13.7.7 selection of brazing material use bag brazing material (silver solder) to increase the welding performance. Category jis standard number composition of ingredients (%) temperature (°c) tensile strength (reference) characteristics and applications ag cu zu cd ni p solidus liquidus brazing t...

  • Page 57

    57 13.7.10 checking of brazing (insert) points 1. No impurity on the brazing point if dirt or oil is attached on the brazing point, the brazing filler metal does not reach to junction, and it may cause poor welding. 2. Adequate gap space in the brazing point the advantage of capillary current situat...

  • Page 58

    58 (reference) melting temperature of copper • • • • • • • approx. 1083°c maximum temperature obtained in propane and oxygen • • • • • • • approx. 1083°c the important point is to heat the bonding part uniformly within a short period of time until reaching to the brazing temperature in the following...

  • Page 59

    59 13.8 analysis method for no error code, no cooling / no warming 13.8.1 preparation for appropriate diagnosis in order to obtain appropriate operation characteristics, minimum 15 minutes or more operation time [testing operation (rated operation)] is required. 1. Method of rated operation (rated o...

  • Page 60

    60 1. Measuring temperature 1) indoor unit suction temperature, release temperature, temperature difference, → measure by thermometer 2) 2-way valve pipe temperature in cooling mode is low temperature (benchmark：5 ~ 10°c), in heating mode is medium temperature (benchmark：25 ~ 35°c). 3) 3-way valve p...

  • Page 61: 14. Operation

    61 14. Operation control 14.1 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 maintai...

  • Page 62

    62 14.1.5 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 seco...

  • Page 63

    63 ii auto fan speed [cooling, dry]  according to room temperature and setting temperature, indoor fan speed is determined automatically.  when set temperature is not achieved, the indoor fan will operate according to pattern below.  when set temperature achieved, the indoor fan speed will be fix...

  • Page 64

    64 14.3 outdoor fan motor operation  it starts when compressor starts operation and it stops 30 seconds after compressor stops operation.  during cooling operation, and outdoor ambient temperature is below 8°c, outdoor fan speed will be controlled according to outdoor piping temperature as followi...

  • Page 65

    65 14.4 airflow direction  there are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by vertical vanes).  control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger temperature and intake ...

  • Page 66

    66 step 5 step 4 step 3 step 2 step 1 reference point 128° closed position step 5 step 4 step 3 step 2 step 1 reference point 128° 28° closed position figure 2 14.4.2 horizontal airflow  automatic horizontal airflow direction can be set using remote control; the vane swings left and right within th...

  • Page 67

    67 14.5 quiet operation (cooling mode/cooling area of dry mode)  purpose o to provide quiet cooling operation compare to normal operation.  control condition o quiet operation start condition when “powerful/quiet” button at remote control is pressed twice. Quiet will be shown on remote control dis...

  • Page 68

    68 14.8 timer control  there are 2 sets of on and off timer 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 displayed and will activate in sequence. 14.8.1 on timer control  on timer 1 and on timer 2 can be set using ...

  • Page 69

    69 14.11 econavi operation  econavi start condition: o when econavi button is pressed.  econavi stop conditions: o when econavi button is pressed again. O when unit is off by off/on button. O when unit is off when off timer activates. O when unit is off by auto off/on button at indoor unit. O when...

  • Page 70

    70 14.11.3 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: set press & release press to choose no.2 remote control normal mode set sensiti...

  • Page 71

    71 14.11.4 judge ambient condition  according to sunlight intensity over a period of time, the system will analyze the ambient condition is sunny, cloudy or night. 14.11.5 temperature shift set temperature heat cool/dry +1 °c -1 °c -1 °c ambient condition mode econavi ; detecting sunlight intensity...

  • Page 72

    72  to disable sunlight sensor check mode o after check mode is ended (5 minutes counter elapsed), press auto off/on button at indoor unit. O if the sunlight sensor detected sunlight intensity is at abnormal range, the check mode will be ended. Please check for error code. 14.11.7 sunlight sensor a...

  • Page 73

    73 14.12 +8/15°c heat operation  +8/15°c heat operation provides heating at low setting temperature in unoccupied houses during winter for the purpose of protecting equipments or housing appliances which may be destroyed by the extreme cold weather.  this operation can be on by pressing the +8/15°...

  • Page 74: 15. Protection

    74 15. Protection control 15.1 protection control for all operations 15.1.1 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 per...

  • Page 75

    75 compressor = off compressor frequency reduce compressor frequency limited free comp. Temperature 103°c 99°c 96°c 88°c 87°c 86°c 15.1.5 low pressure prevention control (gas leakage detection)  control start conditions o for 5 minutes, the compressor continuously operates and outdoor total current...

  • Page 76

    76 15.2 protection control for cooling & soft dry operation 15.2.1 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.  compresso...

  • Page 77

    77 15.2.6 odor cut control  to reduce the odor released from the unit. O 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. O control content depends on compressor conditions: 1. ...

  • Page 78: 16. Servicing

    78 16. Servicing mode 16.1 auto off/on button 16.1.1 mode setting by emergency sw emergency operation emergency sw is pressed emergency sw is pressed emergency sw is pressed emergency sw is pressed operation time check 5s 5s 5s 5s pit pit pit pit pit pit stop stop stop forced cooling operation force...

  • Page 79

    79 3 remote control number switch mode the remote control number switch mode will be activated if the auto off/on button is pressed continuously for more than 11 seconds (3 “beep” sounds will occur at 11th seconds to identify the remote control number switch mode is in standby condition) and press “...

  • Page 80

    80  auto restart enable/disable selection normal display mode transmit “enable or disable” code control disable control enable press sw to enter customer zone & press sw’s to choose function 10 1 press sw, special setting is immediately cancelled and normal mode starts. 2 if no sw is pressed for 30...

  • Page 81

    81  new deice judgement selection normal display mode press sw (t 0secs) when sw pressed continuously for t 5secs to enter service zone & press sw’s to choose function 60 transmit “no or yes” code switching = no switching = yes note: by default is new deice judgement. 16.2.2 reset (rc)  to clear a...

  • Page 82: 17. Troubleshooting

    82 17. Troubleshooting guide 17.1 refrigeration cycle system in order to diagnose malfunctions, make sure that there are no electrical problems before inspecting the refrigeration cycle. Such problems include insufficient insulation, problem with the power source, malfunction of a compressor and a f...

  • Page 83

    83 17.1.1 relationship between the condition of the air conditioner and pressure and electric current condition of the air conditioner cooling mode heating mode low pressure high pressure electric current during operation low pressure high pressure electric current during operation insufficient refr...

  • Page 84

    84 17.2 breakdown self diagnosis function 17.2.1 self diagnosis function (three digits alphanumeric code)  once abnormality has 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 u...

  • Page 85

    85 17.3 error codes table diagnosis display abnormality / protection control abnormality judgment protection operation problem check location h00 no memory of failure — normal operation — — h11 indoor/outdoor abnormal communication after operation for 1 minute indoor fan only operation can start by ...

  • Page 86

    86 diagnosis display abnormality / protection control abnormality judgment protection operation problem check location h41 abnormal wiring or piping connection — — wrong wiring and connecting pipe, expansion valve abnormality  check indoor/outdoor connection wire and connection pipe  expansion val...

  • Page 87

    87 17.4 self-diagnosis method 17.4.1 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 ...

  • Page 88

    88 17.4.2 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.  indo...

  • Page 89

    89 17.4.3 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 con...

  • Page 90

    90 17.4.4 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 connectio...

  • Page 91

    91 17.4.5 h16 (outdoor current transformer) malfunction decision conditions  an input current, detected by current transformer ct, is below threshold value when the compressor is operating at certain frequency value for 3 minutes. Malfunction caused  lack of gas  broken ct (current transformer) ...

  • Page 92

    92 17.4.6 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 > 2550 rpm or malfunction caused  operation stops due to short circuit i...

  • Page 93

    93 17.4.7 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 conne...

  • Page 94

    94 17.4.8 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.  f...

  • Page 95

    95 17.4.9 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 96

    96 17.4.10 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 conn...

  • Page 97

    97 17.4.11 h32 (outdoor heat exchanger temperature sensor 2 abnormality) malfunction decision conditions  during startup and operation of cooling and heating, the temperatures detected by the outdoor heat exchanger temperature sensor are used to determine sensor errors. Malfunction caused  faulty ...

  • Page 98

    98 17.4.12 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 ou...

  • Page 99

    99 17.4.13 h34 (outdoor heat sink temperature sensor abnormality) malfunction decision conditions  during startup and operation of cooling and heating, the temperatures detected by the outdoor heat sink temperature sensor are used to determine sensor errors. Malfunction caused  faulty connector co...

  • Page 100

    100 17.4.14 h36 (outdoor gas pipe sensor abnormality) malfunction decision conditions  during startup and operation of cooling and heating, the temperatures detected by the outdoor gas pipe temperature sensor are used to determine sensor errors. Malfunction caused  faulty connector connection.  f...

  • Page 101

    101 17.4.15 h37 (outdoor liquid pipe temperature sensor abnormality) malfunction decision conditions  during startup and operation of cooling and heating, the temperatures detected by the outdoor liquid pipe temperature sensor are used to determine sensor errors. Malfunction caused  faulty connect...

  • Page 102

    102 17.4.16 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.  o...

  • Page 103

    103 17.4.17 h98 (error code stored in memory and no alarm is triggered / no timer led flashing) malfunction decision conditions  indoor high pressure is detected when indoor heat exchanger is detecting very high temperature when the unit is operating in heating operation.  phenomena: unit is stopp...

  • Page 104

    104 17.4.18 h99 (indoor freeze prevention protection: cooling or soft dry) error code will not display (no timer led blinking) but store in eeprom malfunction decision conditions  freeze prevention control takes place (when indoor pipe temperature is lower than 2°c) malfunction caused  air short c...

  • Page 105

    105 17.4.19 f11 (4-way valve switching failure) malfunction decision conditions  when indoor heat exchanger is cold during heating (except deice) or when indoor heat exchanger is hot during cooling and compressor operating, the 4-way valve is detected as malfunction. Malfunction caused  indoor hea...

  • Page 106

    106 17.4.20 f17 (indoor standby units freezing abnormality) malfunction decision conditions  when the different between indoor intake air temperature and indoor pipe temperature is above 10°c or indoor pipe temperature is below -1.0°c. Remark: when the indoor standby unit is freezing, the outdoor u...

  • Page 107

    107 17.4.21 f90 (power factor correction protection) malfunction decision conditions  to maintain dc voltage level supply to power transistor.  to detect high dc voltage level after rectification. Malfunction caused  during startup and operation of cooling and heating, when power factor correctio...

  • Page 108

    108 17.4.22 f91 (refrigeration cycle abnormality) malfunction decision conditions  the input current is low while the compressor is running at higher than the setting frequency. Malfunction caused  lack of gas.  3-way valve close. Troubleshooting.

  • Page 109

    109 17.4.23 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  faulty outdoor pcb  faulty compressor ...

  • Page 110

    110 17.4.24 f95 (outdoor high pressure protection: cooling or soft dry) malfunction decision conditions  during operation of cooling or soft dry, when outdoor unit heat exchanger high temperature data is detected by the outdoor unit heat exchanger thermistor. Malfunction caused  outdoor heat excha...

  • Page 111

    111 17.4.25 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. Multi models only o compressor overheating: during operation of cooling and heating, when the compressor ol is act...

  • Page 112

    112 17.4.26 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  faulty compressor tank temperature sensor  2/3 way valve clos...

  • Page 113

    113 17.4.27 f98 (input over current detection) malfunction decision conditions  during operation of cooling and heating, when an input over-current (x value in total running current control) is detected by checking the input current value being detected by current transformer (ct) with the compress...

  • Page 114

    114 17.4.28 f99 (dc peak detection) malfunction decision conditions during startup and operation of cooling and heating, when inverter dc peak data is received by the outdoor internal dc peak sensing circuitry. Malfunction caused  dc current peak due to compressor failure.  dc current peak due to ...

  • Page 115

    115 warning 18. 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. 18.1 indoor electronic ...

  • Page 116

    116 18.1.2 to remove electronic controller 4. Remove control board cover by releasing 3 hooks. 3 hooks (top, left and right hand side) figure 2 6. Detach lead wires acn501 (grey), acn502 (white), ac302 (yellow), acl501 (brown) and ac304 (red) from the terminal board. 10. Detach all connectors as lab...

  • Page 117

    117 18.1.3 to remove discharge grille 11. Remove the screw and pull out the hvu unit. Hvu unit figure 6 13. Then pull the discharge grille downward gently to dismantle it. 12. Pull out and remove the drain hose from the discharge grille. Figure 7 18.1.4 to remove control board 14. Remove the 4 screw...

  • Page 118

    118 18.1.5 to remove cross flow fan and indoor fan motor figure 9 17. Remove the bearing by pulling it gently. 16. Remove the screw from the evaporator. Figure 10

  • Page 119

    119 19. Remove the cross flow fan from the unit by pulling it to the left and downward. 18. Push the holdfast to the left and lift up the evaporator. Cross flow fan 20. Fan motor can be removed after the removal of the cross flow fan. Evaporator reminder: to reinstall the fan motor, adjust the fan m...

  • Page 120

    120 18.1.6 to assemble the front grille do not directly fix the front grille complete, to avoid hitting the receiver pcb. Caution receiver pcb figure 13 21. Gently assemble the right side of the front grille first then fix the left side. Figure 14.

  • Page 121

    121 18.1.7 to assemble the intake grille 22. Align the intake grille hooks into the slot. 23. Place in the hook to the slot. 24. Then slightly bend the intake grille and push in the hooks into the slot. Hook intake grille hook figure 15.

  • Page 122

    122 18.2 outdoor electronic controller removal procedure caution! When handling electronic controller, be careful of electrostatic discharge. 1 remove the 5 screws of the top panel. Fig. 1 2 remove the 8 screws of the front panel. Fig. 2 3 remove the screw of the terminal board cover. 4 remove the t...

  • Page 123: 19. Technical

    123 19. Technical data technical data provided are based on the air conditioner running under free frequency. 19.1 cool mode performance data unit setting: standard piping length, hi fan, cool mode at 16°c voltage: 230v 19.1.1 cs-nz9ske/cu-nz9ske cs-qz9ske/cu-qz9ske indoor (°c) outdoor db (°c) db wb...

  • Page 124

    124 19.2 heat mode performance data unit setting: standard piping length, hi fan, heat mode at 30°c voltage: 230v 19.2.1 cs-nz9ske/cu-nz9ske cs-qz9ske/cu-qz9ske indoor (°c) outdoor wb (°c) db -20 -15 -7 2 7 tc ip tc ip tc ip tc ip tc ip 24 2379 1484 3021 1675 3407 1578 3800 1400 4754 1595 20 2470 13...

  • Page 125: 20. Service

    125 20. Service data service data provided are based on the air conditioner running under rated frequency during forced cooling / forced heating mode. 20.1 cool mode outdoor air temperature characteristic condition - indoor room temperature: 27°c dry bulb/19°c wet bulb - unit setting: standard pipin...

  • Page 126

    126 20.1.2 cs-nz12ske cu-nz12ske outlet air (°c) outdoor air temperature (°c) low pressure (mpa) outdoor air temperature (°c) current (a) outdoor air temperature (°c) 10.00 10.50 11.00 11.50 12.00 12.50 13.00 13.50 14.00 14.50 15.00 15 20 25 30 35 40 45 50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 15 20 25...

  • Page 127

    127 20.2 heat mode outdoor air temperature characteristic condition - indoor room temperature: 20°c dry bulb/ -°c wet bulb - unit setting: standard piping length, forced heating at 30°c, hi fan - compressor frequency: rated for heating operation - piping length: 5m - voltage: 230v 20.2.1 cs-nz9ske c...

  • Page 128

    128 20.2.2 cs-nz12ske cu-nz12ske outlet air (°c) outdoor air temperature (°c) high pressure (mpa) outdoor air temperature (°c) current (a) outdoor air temperature (°c) 1.50 2.00 2.50 3.00 3.50 4.00 4.50 -25 -20 -15 -10 -5 0 5 10 1.4 1.6 1.8 2.0 2.2 2.4 2.8 2.6 -25 -20 -15 -10 -5 0 5 10 20 24 28 32 3...

  • Page 129

    129 20.3 piping length correction factor the characteristic of the unit has to be corrected in accordance with the piping length. 20.3.1 cs-nz9ske cu-nz9ske cs-qz9ske cu-qz9ske cs-nz12ske cu-nz12ske cooling capacity correction factor heating capacity correction factor pipe length (m) pipe length (m)...

  • Page 130

    130 21. Exploded view and replacement parts list 21.1 indoor unit a a a a 3 2 7 4 5 47 27 14 10 46 34 38 11 35 26 41 40 43 1 19 17 28 6 13 18 42 45 44 12 32 33 15 16 29 30 36 39 48 cwh55025j cwh55051j 9 8 45 o/i 50 i/i 51 i/i 53 i/i 52 i/i 54 i/i 55 49 note the above exploded view is for the purpose...

  • Page 131

    131 safety ref. No. Part name & description qty. Cs-nz9ske cs-nz12ske remark 1 chassis complete 1 acxd50c00200 ← 2 fan motor 1 arw7628accb ← o 3 cross-flow fan complete 1 cwh02c1076 ← 4 bearing assy 1 cwh64k1010 ← 5 screw - cross-flow fan 1 cwh551146 ← 6 particular piece 1 cwd933067b ← 7 evaporator ...

  • Page 132

    132 safety ref. No. Part name & description qty. Cs-qz9ske remark 1 chassis complete 1 acxd50c00200 2 fan motor 1 arw7628accb o 3 cross-flow fan complete 1 cwh02c1076 4 bearing assy 1 cwh64k1010 5 screw - cross-flow fan 1 cwh551146 6 particular piece 1 cwd933067b 7 evaporator 1 acxb30c01970 8 flare ...

  • Page 133

    133 21.2 outdoor unit 32 30 31 36 9 16 17 20 21 22 29 26 35 27 2 15 3 8 7 5 6 4 11 33 28 34 19 1 10 39 49 48 51 14 38 50 18 23 52 53 12 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 134

    134 safety ref. No. Part name & description qty. Cu-nz9ske remark 1 chassis complete 1 cwd52k1310 2 sound proof material 1 cwg302630 3 fan motor bracket 1 cwd541167 4 screw - fan motor bracket 2 cwh551217 5 fan motor 1 ars6411ac o 6 screw - fan motor mount 4 cwh55252j 7 propeller fan assy 1 cwh03k10...

  • Page 135

    135 safety ref. No. Part name & description qty. Cu-nz12ske remark 1 chassis complete 1 cwd52k1359 2 sound proof material 1 cwg302630 3 fan motor bracket 1 cwd541167 4 screw - fan motor bracket 2 cwh551217 5 fan motor 1 ars6411ac o 6 screw - fan motor mount 4 cwh55252j 7 propeller fan assy 1 cwh03k1...

  • Page 136

    136 safety ref. No. Part name & description qty. Cu-qz9ske remark 1 chassis complete 1 cwd52k1310 2 sound proof material 1 cwg302630 3 fan motor bracket 1 cwd541167 4 screw - fan motor bracket 2 cwh551217 5 fan motor 1 ars6411ac o 6 screw - fan motor mount 4 cwh55252j 7 propeller fan assy 1 cwh03k10...