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Panasonic CS-E12NKUAW Service Manual

Summary of CS-E12NKUAW

  • Page 1

    © panasonic corporation 2013 order no: papamy1312045ce indoor unit cs-me7qkua destination u.S.A. Canada please file and use this manual together with the service manual for model no. Cu-5e36qbu, order no. Papamy1312037ce. Precaution of low temperature in order to avoid frostbite, be assured of no re...

  • Page 2: Table of Contents

    2 table of contents 1. Safety precautions ............................................. 3 2. Specification ....................................................... 5 3. Features ............................................................... 7 4. Location of controls and components ............ 8 4.1...

  • Page 3: 1. Safety Precautions

    3 caution warning warning 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

    4 caution 19. 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 e...

  • Page 5: 2. Specification

    5 2. Specification model indoor cs-me7qkua outdoor cu-5e36qbu performance test condition ari power supply phase, hz single, 60 v 208 230 min. Mid. Max. Min. Mid. Max. Cooling capacity kw 1.80 2.01 2.90 1.80 2.01 2.90 btu/h 6100 6900 9900 6100 6900 9900 running current a - 2.8 - - 2.5 - input power w...

  • Page 6

    6 model indoor cs-me7qkua outdoor cu-5e36qbu drain hose inner diameter mm (inch) 16.7 (5/8) length mm (inch) 650 (25-5/8) indoor heat exchanger fin material aluminium (pre coat) fin type slit fin row x stage x fpi 2 x 15 x 21 size (w x h x l) mm (inch) 25.4 x 315 x 610 (1 x 12-3/8 x 24) air filter m...

  • Page 7: 3. Features

    7 3. Features  inverter technology o wider output power range o energy saving o quick cooling o more precise temperature control  environment protection o non-ozone depletion substances refrigerant (r410a)  long installation piping o long piping up to 82 ft (25 meters) for 1 room  easy to use re...

  • Page 8

    8 4. Location of controls and components 4.1 indoor unit 4.2 outdoor unit 4.3 remote control.

  • Page 9: 5. Dimensions

    9 5. Dimensions 5.1 indoor unit.

  • Page 10

    10 6. Refrigeration cycle diagram.

  • Page 11: 7. Block Diagram

    11 7. Block diagram.

  • Page 12

    12 8. Wiring connection diagram 8.1 indoor unit.

  • Page 13

    13 9. Electronic circuit diagram 9.1 indoor unit.

  • Page 14: 10.  Printed Circuit Board

    14 10. Printed circuit board 10.1 indoor unit 10.1.1 main printed circuit board.

  • Page 15

    15 10.1.2 power printed circuit board 10.1.3 indicator printed circuit board.

  • Page 16: 11. Installation

    16 11. Installation instruction 11.1 select the best location 11.1.1 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 17

    17 11.2 indoor unit 11.2.1 how to fix installation plate the mounting wall shall be strong and solid enough to prevent it from the vibration. The center of installation plate should be at more than  at right and left of the wall. The distance from installation plate edge to ceiling should more than...

  • Page 18

    18 11.2.3 indoor unit installation 11.2.3.1 for the right rear piping 11.2.3.2 for the right bottom piping 11.2.3.3 for the embedded piping (this can be used for left rear piping and bottom piping also.).

  • Page 19

    19 11.2.4 connect the cable to the indoor unit 1. The inside and outside connection cable can be connected without removing the front grille. 2. Unscrew the conduit cover and fix the conduit connector to conduit cover with lock nut, then secure it against chassis. 3. Connection cable between indoor ...

  • Page 20

    20 11.2.5 wiring stripping and connecting requirement 11.2.5.1 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 are not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering...

  • Page 21: 12. Operation

    21 12. Operation control 12.1 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 maintai...

  • Page 22

    22 12.1.4.2 automatic operation  this mode can be set using remote control and the operation is decided by remote control setting temperature, remote control operation mode and indoor intake air temperature.  during operation mode judgment, indoor fan motor (with speed of lo-) is running for 30 se...

  • Page 23

    23 [heating] o according to indoor pipe temperature, automatic heating fan speed is determined as follows.  feedback control o immediately after the fan motor started, feedback control is performed once every second. O during fan motor on, if fan motor feedback ≥ 2550 rpm or error counter increase,...

  • Page 24

    24 12.4.2 horizontal airflow the horizontal airflow direction louvers can be adjusted manually by hand. 12.5 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 ...

  • Page 25

    25  control contents o fan speed auto indoor fm rpm depends on pipe temperature sensor of indoor heat exchanger. Auto fan speed is changed from normal setting to quiet setting of respective fan speed. This is to reduce sound of hi, me, lo for 3db. O fan speed manual manual fan speed for quiet opera...

  • Page 26

    26 12.10 indication panel note:  if power led is blinking, the possible operation of the unit are hot start, during deice operation, operation mode judgment, or on timer sampling.  if timer led is blinking, there is an abnormality operation occurs..

  • Page 27

    27 13. Operation control (for multi split connection) during multi split connection, indoor unit’s operation controls are same with single split connection unless specified in this chapter. 13.1 cooling operation 13.1.1 thermostat control  capability supply to indoor unit is off (expansion valve cl...

  • Page 28

    28  for the 2nd judgment onwards o if indoor intake temperature - remote control setting temperature  5.4°f, if previous operate in dry mode, then continue in dry mode, otherwise cool mode is decided. O if -3.6°f ≤ indoor intake temperature - remote control setting temperature mode. O if indoor in...

  • Page 29: 14. Servicing

    29 14. Servicing mode 14.1 auto off/on button 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 with limited function if remote control is misplaced or malfunction. 2 test run operation...

  • Page 30

    30 4 remote control receiving sound off/on mode the remote control receiving sound off/on mode will be activated if the auto off/on button is pressed continuously for more than 16 seconds (4 “beep” sounds will occur at 16 th seconds to identify the remote control receiving sound off/on mode is in st...

  • Page 31: 15. Troubleshooting

    31 15. Troubleshooting guide 15.1 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 32

    32 15.1.1 relationship between the condition of the air conditioner and pressure and electric current  carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started..

  • Page 33

    33 15.2 breakdown self diagnosis function 15.2.1 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 bre...

  • Page 34

    34 15.3 error code table.

  • Page 35

    35 note: “○” – frequency measured and fan speed fixed the memory data of error code is erased when the power supply is cut off, or press the auto switch until “beep” sound heard following by pressing the check button at remote control. Although operation forced to stop when abnormality detected, eme...

  • Page 36

    36 15.4 self-diagnosis method 15.4.1 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 37

    37 15.4.2 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 38

    38 15.4.3 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 39

    39 15.4.4 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 40

    40 15.4.5 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 0.65a) for continuously 20 seconds. Malfunction caused  ct defe...

  • Page 41

    41 15.4.6 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 malfunction caused  operation stops due to short circuit in...

  • Page 42

    42 15.4.7 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 43

    43 15.4.8 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 44

    44 15.4.9 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 45

    45 15.4.10 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 46

    46 15.4.11 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 47

    47 15.4.12 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 48

    48 15.4.13 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.  fa...

  • Page 49

    49 15.4.14 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 connecto...

  • Page 50

    50 15.4.15 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.  op...

  • Page 51

    51 15.4.16 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 140°f. Malfunction caused  clogged air filter ...

  • Page 52

    52 15.4.17 h99 (indoor freeze prevention protection: cooling or soft dry) malfunction decision conditions  freeze prevention control takes place (when indoor pipe temperature is lower than 35.6°f) malfunction caused  clogged air filter of the indoor unit  dust accumulation on the indoor unit heat...

  • Page 53

    53 15.4.18 f11 (indoor pipe temperature sensor abnormality) malfunction decision conditions  when cooling operation, when indoor pipe temperature or indoor heat exchanger temperature sensor is above 113°f. Malfunction caused  faulty connector connection.  faulty indoor pipe temperature sensor.  ...

  • Page 54

    54 15.4.19 f17 (indoor standby units freezing abnormality) malfunction decision conditions  when the different between indoor intake air temperature and indoor pipe temperature is above 50°f or indoor pipe temperature is below 30.2°f remark: when the indoor standby unit is freezing, the outdoor uni...

  • Page 55

    55 15.4.20 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 ...

  • Page 56

    56 15.4.21 f91 (refrigeration cycle abnormality) malfunction decision conditions  during cooling, compressor frequency = fcmax.  during cooling and heating operation, running current: 0.65a  during cooling, indoor intake - indoor pipe malfunction caused  refrigerant shortage (refrigerant leakage...

  • Page 57

    57 15.4.22 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 58

    58 15.4.23 f95 (cooling high pressure abnormality) malfunction decision conditions during operation of cooling, when outdoor unit heat exchanger high temperature data (141.8°f) is detected by the outdoor pipe temperature sensor. Malfunction caused  outdoor pipe temperature rise due to short circuit...

  • Page 59

    59 15.4.24 f96 (ipm overheating) malfunction decision conditions during operating of cooling and heating, when ipm temperature 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 o...

  • Page 60

    60 15.4.25 f97 (compressor overheating) malfunction decision conditions during operation of cooling and heating, when compressor tank temperature data (233.6°f) is detected by the compressor tank temperature sensor. Malfunction caused  refrigerant shortage (refrigerant leakage).  2/3 way valve clo...

  • Page 61

    61 15.4.26 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-cur...

  • Page 62

    62 15.4.27 f99 (output over current detection) malfunction decision conditions during operation of cooling and heating, when an output over-current (18.5a) is detected by checking the current that flows in the inverter dc peak sensing circuitry. Malfunction caused  dc peak due to compressor failure...

  • Page 63

    63 warning 16. 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. 16.1 indoor electronic c...

  • Page 64

    64 16.1.1.2 to remove discharge grille.

  • Page 65

    65 16.1.1.3 to remove control board 16.1.1.4 to remove cross flow fan and indoor fan motor.

  • Page 66

    66.

  • Page 67

    67 17. Exploded view and replacement parts list 17.1 indoor unit 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 68

    68 safety ref. No. Part name & description qty. Cs-me7qkua remark 1 chassis complete 1 cwd50c1633 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 cwb30c3504 8 flare nut (liquid) 1 cwt251030 9 flare nut...