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Panasonic CS-ME5RKUA Service Manual

Summary of CS-ME5RKUA

  • Page 1

    © panasonic corporation 2015. Order no: papamy1503085ae indoor unit cs-me5rkua cs-me7rkua destination usa canada please file and use this manual together with the service manual for model no. Cu-2e18nbu, cu-5e36qbu and cu-3e19rbu cu-4e24rbu, order no. Phaam1111120a1, papamy1312037ce and papamy150510...

  • Page 2: Table of Contents

    2 table of contents 1. Safety precautions ............................................. 3 2. Specification ....................................................... 5 3. Features ............................................................... 9 4. Location of controls and components .......... 10 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 warning caution 21. After completion of installation, confirm there is no leakage of refrigerant gas. It may generate toxic gas when the refrigerant contacts with fire. 22. Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when the refrigerant contacts with fir...

  • Page 5: 2. Specification

    5 2. Specification model indoor cs-me5rkua cs-me7rkua outdoor cu-3e19rbu cu-3e19rbu performance test condition ahri ahri power supply phase, hz single, 60 single, 60 v 208 230 208 230 min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Cooling capacity kw 1.30 1.62 2.30 1.30 1.62 2.30 1.80 2...

  • Page 6

    6 model indoor cs-me5rkua cs-me7rkua outdoor cu-3e19rbu cu-3e19rbu indoor heat exchanger fin material aluminium (pre coat) aluminium (pre coat) fin type slit fin slit fin row x stage x fpi 2 x 15 x 21 2 x 15 x 21 size (w x h x l) inch 1 x 12-13/32 x 24 1 x 12-13/32 x 24 air filter material polyprope...

  • Page 7

    7 model indoor cs-me7rkua cs-me7rkua outdoor cu-2e18nbu cu-5e36qbu performance test condition ahri ahri power supply phase, hz single, 60 single, 60 v 208 230 208 230 min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Cooling capacity kw 1.80 2.01 2.90 1.80 2.01 2.90 1.80 2.01 2.90 1.80 2.0...

  • Page 8

    8 model indoor cs-me7rkua cs-me7rkua outdoor cu-2e18nbu cu-5e36qbu indoor heat exchanger fin material aluminium (pre coat) aluminium (pre coat) fin type slit fin slit fin row x stage x fpi 2 x 15 x 21 2 x 15 x 21 size (w x h x l) inch 1 x 12-13/32 x 24 1 x 12-13/32 x 24 air filter material polyprope...

  • Page 9: 3. Features

    9 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 feet (25 meters) for 1 room, 164 feet (50 ...

  • Page 10

    10 4. Location of controls and components 4.1 indoor unit 4.2 outdoor unit 4.3 remote control power timer econavi auto co mfort powerf ul quiet horizontal airflow direction louver • manually adjustable. Aluminium fin auto off/on button air purifying filter human activity sensor front panel remote co...

  • Page 11: 5. Dimensions

    11 5. Dimensions 5.1 indoor unit 7/8 1-7/8 5- 1/ 4 remote control remote control holder 2 2-3 /8 a uto co mfo rt m o d e pow erful/ q uiet t e m p o f f / o n t i m e r s e t c a n c e l o n o f f 1 2 3 air sw ing fan speed set check clock reset ac rc e c o na v i f a n sp e ed a ir sw in g a u t o ...

  • Page 12

    12 6. Wiring connection diagram 6.1 indoor unit m rectification circuit communication circuit grounding terminal 1 w 2 3 bl evaporator ac303 (wht) ac306 (blk) ac304 (red) g301 (grn) fuse301 t3.15a l250v noise filter circuit temp. Fuse 102°c (3a) to outdoor unit terminal board r y/g g auto sw (sw01) ...

  • Page 13

    13 7. Electronic circuit diagram 7.1 indoor unit bz201 bz 5v_ r209 47 ic201 c202 0.01u c201 47u r218 0 c e jp201 r210 jp200 r211 jp203 r212 jp204 powerful/quiet (orange/green) 1 3 2 led205 r207 620 sen201 pcb3 r216 0 r206 2.7k r217 0 b c e q202 q201 4.7k 10k r213 r208 gnd-a + 1 2 3 vout vcc gnd gnd ...

  • Page 14: 8. Printed Circuit Board

    14 8. Printed circuit board 8.1 indoor unit 8.1.1 main printed circuit board 8.1.2 indicator printed circuit board cn-rmt cn-fm cn-cnt cn-stm1 cn-msens cn-th jp1 (random auto restart enable/disable) cn-disp cn-disp.

  • Page 15

    15 8.1.3 comparator printed circuit board cn-sens1 cn-sens2 cn-msens.

  • Page 16: 9. Installation Instruction

    16 9. Installation instruction 9.1 select the best location 9.1.1 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 pl...

  • Page 17

    17 9.2 indoor unit 9.2.1 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 9.2.3 indoor unit installation 9.2.3.1 for the right rear piping 9.2.3.2 for the right bottom piping 9.2.3.3 for the embedded piping (this can be used for left rear piping and bottom piping also.) do not turn over the unit without it’s shock absorber during pull out the piping. It may cause intak...

  • Page 19

    19 9.2.4 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 u...

  • Page 20

    20 9.2.5 wiring stripping and connecting requirement 9.2.5.1 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 is not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering th...

  • Page 21: 10. Operation

    21 10. Operation control 10.1 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 10.4.2 temperature sampling control  temperature sampling is controlled by outdoor unit where room temperature for all power supply on indoor unit could be obtained.  when capability supply to the indoor unit is off and the compressor is on during heating operation, the indoor fan motor is stop...

  • Page 23

    23 10.7 indoor fan motor operation 10.7.1 residual heat removal control  to prevent high pressure at indoor unit, when heating mode thermostat-off condition or power supply off, indoor fan continue to operate at controlled fan speed for maximum 30 seconds then stop. 10.7.2 basic rotation speed (rpm...

  • Page 24

    24 10.8 outdoor fan motor operation outdoor fan motor is operated with fan speed number of rotation. It starts when compressor starts operation and it stops 30 seconds after compressor stops operation. On on compressor off on fan speed on outdoor fan 30 sec off 10.9 airflow direction  there are t...

  • Page 25

    25 10.10 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 “quiet” button at remote control is pressed. Quiet led illuminates. O quiet operation stop condition...

  • Page 26

    26 10.13 timer control 10.13.1 on timer control  on timer can be set using remote control, where the unit with timer set will start operation earlier than the setting time. This is to provide a comfortable environment when reaching the set on time.  60 minutes before the set on time, indoor (at fa...

  • Page 27

    27 10.16 econavi and auto comfort operation  a pyoelectric infrared sensor is used to detect injection strength variation of infrared at setting area to determine the presence or absence of human and its activity level. Human detection area is shown in figure below:  econavi and auto comfort opera...

  • Page 28

    28  econavi and auto comfort demo mode to enable eco demo mode, during unit is off (power standby): to disable eco demo mode:  transmit eco demo signal again. Control details:  during econavi and auto comfort demo mode, operation led on and horizontal vane will set to auto swing.  when hi activi...

  • Page 29

    29  timer operation when unit is turn on by on timer and econavi and auto comfort operation is on during previous operation before off, econavi and auto comfort operation will not be on automatically. When unit is turn on by on timer and econavi and auto comfort operation is off during previous ope...

  • Page 30: 11. Servicing

    30 11. Servicing mode 11.1 auto off/on button auto off/on button pressed auto off/on button pressed auto off/on button pressed 5 sec 5 sec auto operation test run operation (forced cooling operation) stop test run operation (forced cooling operation) stop beep beep x 2 1 auto operation mode the auto...

  • Page 31

    31 press auto off/on button to toggle remote control receiving sound. - short “beep”: turn off remote control receiving sound. - long “beep”: turn on remote control receiving sound. After auto off/on button is pressed, the 20 seconds counter for remote control receiving sound off/on mode is restarte...

  • Page 32: 12. Troubleshooting

    32 12. Troubleshooting guide 12.1 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 33

    33 12.1.1 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. E d o m g n it a e h e d o m g n il o o c low pressure high pressure electr...

  • Page 34

    34 12.2 breakdown self diagnosis function 12.2.1 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 35

    35 12.3 error code table abnormality / protection control abnormality judgement protection operation problem check location diagnosis display — — n o it a r e p o l a m r o n — e r u li a f f o y r o m e m o n 0 0 h h11 indoor/outdoor abnormal communication after operation for 1 minute indoor fan on...

  • Page 36

    36 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 37

    37 12.4 self-diagnosis method 12.4.1 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 38

    38 12.4.2 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 39

    39 12.4.3 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 40

    40 12.4.4 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 41

    41 12.4.5 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 42

    42 12.4.6 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 43

    43 12.4.7 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 44

    44 12.4.8 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 45

    45 12.4.9 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 46

    46 12.4.10 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 47

    47 12.4.11 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 48

    48 12.4.12 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 49

    49 12.4.13 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 50

    50 12.4.14 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.  fa...

  • Page 51

    51 12.4.15 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 connecto...

  • Page 52

    52 12.4.16 h59 (human activity sensor abnormality) malfunction decision conditions  feedback signal of human activity sensor. Malfunction caused  feedback signal is fixed at 0 vdc or 5 vdc continuously for 25 seconds during econavi or auto comfort operation.  feedback signal is detected during ec...

  • Page 53

    53 12.4.17 h70 (light sensor abnormality) malfunction decision conditions  feedback signal of light sensor. Malfunction caused  feedback value is 0 vdc continuously. Troubleshooting is the connector connection normal? When abnormality indication starts again. For safety reason and to prevent compo...

  • Page 54

    54 12.4.18 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 55

    55 12.4.19 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 stoppi...

  • Page 56

    56 12.4.20 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 57

    57 12.4.21 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 heat...

  • Page 58

    58 12.4.22 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 59

    59 12.4.23 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 correction...

  • Page 60

    60 12.4.24 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 when f91 indication happens. For safety reason and ...

  • Page 61

    61 12.4.25 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 62

    62 12.4.26 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 exchan...

  • Page 63

    63 12.4.27 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. Multi models only o compressor overheating: during operation of cooling and heating, when the compressor ol is acti...

  • Page 64

    64 12.4.28 f97 (compress or 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  faulty compressor tank temperature sensor  2/3 way valve cl...

  • Page 65

    65 12.4.29 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 compresso...

  • Page 66

    66 12.4.30 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 d...

  • Page 67

    67 warning 13. 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. 13.1 indoor electronic c...

  • Page 68

    68 figure 3 figure 4 13.1.3 to remove discharge grille figure 5 13.1.4 to remove control board figure 6 cn-rmt cn-fm cn-cnt cn-stm1 cn-msens cn-th cn-disp 7. Detach the cn-disp connector then remove the indicator complete. 10. Detach connectors as labeled from the electronic controller. Then pull ou...

  • Page 69

    69 13.1.5 to remove cross flow fan and indoor fan motor figure 7 figure 8 figure 9 14. Remove the screw that holding the cross flow fan and fan motor axis. 16. Remove the bearing by pulling it out gently 15. Remove the screw from the evaporator. 17. Push the holdfast to the left and lift up the evap...

  • Page 70

    70 figure 10 reminder: to reinstall the cross flow fan, ensure cross flow fan is in line as shown in figure 10 cross flow fan.

  • Page 71

    71 14. Exploded view and replacement parts list 14.1 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. I/i i/i o/i cwh55025j cwh55051j 12 24 15 36 55 33 45 46 47 48 40 44 3 4 2 5 1 27 23 11...

  • Page 72

    72 safety ref. No. Description & name qty cs-me5rkua remark 1 chassis complete 1 cwd50c1633 2 fan motor 1 l6cbyyyl0055 o 3 cross flow fan complete 1 cwh02c1076 4 bearing 1 cwh64k007 5 screw 1 cwh551146 7 evaporator co. 1 cwb30c3504 8 flare nut (1/4) - liquid 1 cwt251030 9 flare nut (3/8) - gas 1 cwt...

  • Page 73

    73 safety ref. No. Part name & description qty. Cs-me7rkua 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 6 particular piece 1 cwd933067 7 evaporator 1 cwb30c5033 8 flare nut...

  • Page 74

    74 safety ref. No. Part name & description qty. Cs-me7rkua remark 54 air purifying filter 1 cwd00c1141 55 bag complete (tube connector) 1 cwh82c2030 (note)  all parts are supplied from phaam, malaysia (vendor code: 00029488).  “o” marked parts are recommended to be kept in stock. Printed in malays...