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Panasonic CS-RE12NKR, Service Manual, Page: 39 / 54

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Panasonic CS-RE12NKR Service Manual Download Page 39

39 

 

 

 
 
 
 
 
 
 
 
 
 
 
 

 
 
 

1. After front grille is taking off, remove the cover of control board and holder, and then the Main PCB can be seen. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3.  Drag out the supporting hook to the right side and pull up a bit the main PCB. Then release the lead wire 

connecting to CN-FM, CN-STM3, earth wire (Yellow/Green) on main PCB, and take out the sensor from the 
holder on evaporator. Release the CN1 connector on indicator PCB. Pull out the whole electronic controller. Be 
sure to avoid cracking of the supporting hook. 

 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
4.  Remove the control board complete 

Loose the screws of control board complete, then the whole control board can be pulled out. 

Removal Procedure for Main Electronic Controller 

Front grille 

Main PCB 

Control board cover 

Holder 

Supporting 

Hook 

Indicator & receiver 

CN-FM: Fan motor connector 

Auto OFF/ON 
switch 

CN-STM3: Air swing motor connector 

CN-TH: Sensor connector 

CN1: Indicator connector 

Summary of Contents for CS-RE12NKR

Page 1: ... Control Transmission Code 22 11 3 Operate and Display of Remote Control 23 12 Operation Control 25 12 1 Basic Function 25 12 2 Indoor Fan Motor Operation 27 12 3 Outdoor Fan Motor Operation 28 13 Protection control 30 13 1 Protection Control for All Operations 30 13 2 Protection Control For Cooling and Soft Dry Operation 32 13 3 Indoor Piping Air Temperature Control Heating 33 14 Troubleshooting ...

Page 2: ...36 15 Disassembly and Assembly Instructions 38 15 1 Indoor unit 38 15 2 Outdoor Unit Electronic Controller Complete Removal Procedure 41 16 Technical Data 43 16 1 Operation Characteristic 43 17 Exploded View and Replacement Pars List 51 17 1 Indoor Unit 51 17 2 Outdoor Unit 53 ...

Page 3: ...ectrical shock and fire in case equipment breakdown or insulation breakdown 8 This equipment must be properly earthed Earth line must not be connected to gas pipe water pipe earth of lightning rod and telephone Otherwise it may cause electrical shock in case equipment breakdown or insulation breakdown 9 Do not use joint cable for indoor outdoor connection cable Use the specified indoor outdoor con...

Page 4: ...e 3 Do not touch outdoor unit air inlet and aluminums fin It may cause injury 4 Select an installation location which is easy for maintenance 5 Power supply connection to the air conditioner Connect the power supply cord of the air conditioner to the mains using one of the following methods Power supply point should be in easily accessible place for power disconnection in case of emergency In some...

Page 5: ... Factor 92 90 95 93 dB A H L QLo Hi 42 Lo 27 QLo 25 Hi 42 Lo 33 QLo 25 Indoor Noise Power Level 58 58 dB A H L Hi 48 Lo Hi 50 Lo HEATING Outdoor Noise Power Level 64 66 Max Current A Max Input Power W 6 00 1 420k 8 10 1 920k Starting Current A 4 20 6 40 Type Hermetic Motor compressor Hermetic Motor compressor Motor Type BRUSHLESS 6 poles BRUSHLESS 6 poles Compressor Output Power W 750 1100 Type Cr...

Page 6: ... 16 Drain Hose Length mm 500 500 Fin Material Pre coated Pre coated Fin Type Slit Fin Slit Fin Row x Stage x FPI 2 x 15 x 19 2 x 15 x 19 Indoor Heat Exchanger Size W x H x L mm 610 x 315 x 25 4 610 x 315 x 25 4 Fin Material Pre coated Pre coated Fin Type Slit Fin Slit Fin Row x Stage x FPI 2 x 24 x 17 2 x 24 x 19 Outdoor Heat Exchanger Size W x H x D mm 702 x 504 x 18 19 674 3 777 9 x 504 x 18 19 ...

Page 7: ... auto restart after power failure for safety restart operation o Gas leakage protection o Prevent compressor reverse cycle o Inner protector to protect compressor Operation Improvement o Quiet mode to reduce the indoor unit operating sound o Powerful mode to reach the desired room temperature quickly o 12 hour timer Serviceability Improvement o Breakdown Self Diagnosis Function ANTI BACTERIAL FILT...

Page 8: ...ess RESET button to restore the remote control s default setting POWER GREEN TIMER ORANGE QUIET GREEN INDICATOR POWERFUL RED OFF ON Operation mode Airflow direction adjustment Timer setting Transmitter Fan speed selection Front Panel Air Filter Vertical airflow direction louver Horizontal airflow direction louver Temperature setting Quiet mode Powerful mode ...

Page 9: ...9 5 Dimensions 5 1 Indoor Unit Unit mm ...

Page 10: ...10 5 2 Outdoor Unit Unit mm ...

Page 11: ...11 6 Refrigeration Cycle Diagram COOLIN HEATING ...

Page 12: ...12 7 Block Diagram ...

Page 13: ...13 8 Wiring Diagram CS RE9NKR CU RE9NKR ...

Page 14: ...14 CS RE12NKR CU RE12NKR ...

Page 15: ...15 9 Printed Circuit Board 9 1 Indoor Unit 9 1 1 Main Printed Circuit Board ...

Page 16: ...r is not obstructed There should not be any animal or plant which could be affected by hot air discharged Keep the spaces indicated by arrows from wall ceiling fence or other obstacles Do not place any obstacles which may cause a short circuit of the discharged air If piping length is over the rated length additional refrigerant should be added as shown in the table below Example If the unit is in...

Page 17: ...all with 5 screws or more If mounting the unit on the wall consider using anchor bolts Always mount the installation plate horizontally by aligning the marking off line with the thread and using a level gauge 2 Drill the piping plate hole with ø70 mm hole core drill Put measuring tape at position as shown in the diagram above The hole centre is obtained by measuring the distance namely 115 mm and ...

Page 18: ...18 10 2 3 Indoor Unit Installation ...

Page 19: ...it After selecting the best location start installation according 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 earthquake Please fasten the installation stand firmly with bolt or nails 10 3 2 Connecting the Piping 10 3 2 1 Connecting the piping to indoor uni...

Page 20: ...vacuum pump adaptor 3 Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from 0 cmHg 0 Mpa to 76 cmHg 0 1 Mpa Then evacuate the air approximately ten minutes 4 Close the Low side valve of the charging set and turn off the vacuum pump Make sure that the needle in the gauge does not move after approximately five minutes Note BE SURE TO FOLLOW THIS PROCEDURE ...

Page 21: ...flexible cord where the maximum allowable length is 30m 4 Secure the cable onto the control board with the holder clamper 5 Attach the control board cover back to the original position with the screw 6 For wiring stripping and connection requirement refer to instruction 10 2 4 of indoor unit 10 3 5 Pipe Insulation 1 Please carry out insulation at pipe connection portion as mentioned in Indoor Outd...

Page 22: ...ER ACTION When the switch is continuously pressed between 16 to 21 seconds either H14 error detection selection mode or remote controller s signal receiving sound can be cancelled or turned on 11 2 Select Remote Control Transmission Code There are 4 types of remote control transmission code could be selected and stored in EEPROM of indoor PCB The indoor unit will only operate when received signal ...

Page 23: ...tions by pressing AIR SWING button 5 options 11 3 6 QUIET button and POWERFULL button Start Quiet operation Press QUIET button on remote control and then QUIET display on remote control display QUIET indicator on indoor unit lights up to identify Quiet mode has been activated Start Powerful operation Press POWERUL button on remote control and then POWERFUL displays on remote control display POWERF...

Page 24: ...ly once after setting If OFF ON button on the remote control or AUTO Switch on the indoor unit is pressed the timer setting will be cancelled If Auto Restart Control occurs timer setting will be cancelled During the operation if the ON Timer or ON OFF Timer is set the operation will be stopped 11 3 8 About Cursor Key Which Points To OFF On Remote Control When the ON OFF button on the remote contro...

Page 25: ...en Intake Air Temperature Internal Setting Temperature 1 5 Compressor is ON after waiting for 3 minutes if the Intake Air Temperature Internal Setting Temperature Compressor OFF point 0 5K 12 1 3 Soft Dry Operation 12 1 3 1 Thermostat control Compressor is OFF when Intake Air Temperature Internal Setting Temperature 2 5 Compressor is ON after waiting for 3 minutes if the Intake Air Temperature Int...

Page 26: ...eration Once AUTO mode is selected operation mode is determined by set temperature of remote control and indoor intake temperature 1st judgment JUDGE CONDITION REFERANCE MODE If indoor intake temp Remote control temp setting 2 Cool mode If 2 indoor intake temp Remote control Temp setting 2 Dry mode If indoor intake temp Remote control temp setting 2 Heat mode 2nd following judgment every 10 minute...

Page 27: ...tion Speed i Manual Fan speed Fan motor s number of rotation is determined according to remote control setting Remote control O O O O O QUIET Model Tab Hi Me Me Me Lo QLo COOLING rpm 1170 1030 920 810 700 600 CS RE9NKR HEATING rpm 1120 890 830 770 710 650 COOLING rpm 1170 1060 970 880 790 620 CS RE12NKR HEATING rpm 1150 1010 950 890 830 680 ii Auto Fan Speed Cooling Soft Dry Mode According to room...

Page 28: ... horizontal airflow direction louvers can be adjusted manually by hand 12 3 3 Quiet operation To provide quiet operation comparing to normal operation The Quiet operation can be active or stop by pressing QUIET button on remote control Once Quiet mode is active the unit will continuously operate in QUIET Mode until cancel the mode by pressing QUIET button on remote control 12 3 4 Powerful operatio...

Page 29: ...D blinks the possible operation of the unit is operation mode judgment or ON timer sampling If Timer LED blinks there is an abnormal operation occurs 12 3 7 Timer control Delay ON Timer can be set using remote controller the unit with timer set will start operate earlier than the setting time This is to provide a comfortable environment when reaching the set ON time Seventy minutes before the set ...

Page 30: ...peration although the intake air temperature has reached the thermo off temperature However force stop by pressing the OFF ON button at the remote control is permitted or the Auto OFF ON button at indoor unit The reason for the compressor to force operation for minimum 30 seconds is to allow the refrigerant oil run in a full cycle and return back to the outdoor unit 13 1 3 Total running current co...

Page 31: ...ature The change of frequency is as below CU RE9NKR CU RE12NKR 13 1 6 Low Operation Frequency Protection Control When the compressor operation frequency is lower than 24Hz and continuing for 240 minutes the operation frequency will be changed to 23Hz for 2 minutes This is to prevent the compressor in too low frequency for long time If all following conditions fulfilled the compressor will run in t...

Page 32: ... 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 Compressor frequency will adjust base on outdoor air temperature CU RE9NKR CU RE12NKR 13 2 2 Freeze Prevention Control 1 Frequency of the compressor For prevention of freezing of th...

Page 33: ...ration Frequency for the compressor will change according to the outdoor piping temperature CU RE9NKR CU RE12NKR 13 3 Indoor Piping Air Temperature Control Heating 13 3 1 Indoor Fan Control 1 Indoor fan is controlled by the indoor piping temperature Manual Fan Speed Piping Temperature K0 K1 K2 K3 K4 K5 K6 K7 K8 K9 K10 K11 16 19 24 32 32 36 36 39 54 54 57 60 Auto Fan Speed 2 During heating operatio...

Page 34: ...eted 13 3 2 Overload Protection Control The frequency for the compressor is determined by indoor piping temperature CU RE9NKR CU RE12NKR 13 3 3 Demand Control When the air conditioner connected to Demand Response Enabling Devices DRED the power consumption especially during peak hours could be controlled Three Demand response modes DRM are available DRM1 Compressor cut off DRM2 Operate at 50 of ra...

Page 35: ...utdoor temperature 35 C at cooling mode and 7 C at heating mode Compressor operates at rated frequency Different in the intake and outlet air temperatures Normal Value of electric current during operation Dusty condenser preventing heat radiation Excessive amount of refrigerant Measuring the air temperature different Measuring electric current during operation Measuring gas side pressure More than...

Page 36: ...n be restarted using AUTO Switch on the indoor unit In forced operation the frequency for compressor and fan speed can not be changed and the signal receiving sound is different Normal Operation ON pep Forced Operation ON pep pep pep pep Stop pep Note Refer to the Diagnosis Code Table for the malfunction when forced operation is not available 14 2 2 Display of Error Code 1 Keeping the CHECK button...

Page 37: ...disconnected H33 Incorrect connection of Indoor Outdoor cable Indoor outdoor supply voltage H97 Outdoor fan motor lock Twice within 30 minutes Outdoor fan motor H98 Indoor high pressure protection Air filter dirty Air circulation short circuit H99 Indoor heat exchanger anti freezing protection Indoor heat exchanger freezing Insufficient refrigerant Air filter dirty F11 Cooling Heating cycle change...

Page 38: ...ilure to heed this caution may result in electric shocks 15 1 Indoor unit 1 Open the intake grille and pull it to the horizontal position 2 Pull up the intake grille until it falls off 1 Remove the two caps at the discharge port right and left and then release the two screws on both sides 2 Pull out the front grille form the unit body Removal Procedure for Intake Grille Removal Procedure for Front...

Page 39: ...n evaporator Release the CN1 connector on indicator PCB Pull out the whole electronic controller Be sure to avoid cracking of the supporting hook 4 Remove the control board complete Loose the screws of control board complete then the whole control board can be pulled out Removal Procedure for Main Electronic Controller Front grille Main PCB Control board cover Holder Supporting Hook Indicator rece...

Page 40: ...orator on the left side and pull out the whole evaporator 2 Loose the fixing screw of the cross flow fan 3 After removing the bearing indoor fan can be taken out from the left side 4 Lift up the indoor fan slightly and then pull the fan motor out Removal Procedure for Discharge grille Removal Procedure for Cross Flow Fan Fixing Screw Fixing board Bearing Fan motor ...

Page 41: ...ng can be released 2 Release the 8 pieces screws on top panel and remove the top panel 3 Release L shape front panel by releasing the 8 pieces screws 4 Disconnect the wires from CN HOT CN TH CN TANK connector on outdoor PCB fan motor wire connector and wires from reactor screws Screws screws screws Screws Screws Screws of terminal cover Disconnect wires from the terminal Fan motor wire connector C...

Page 42: ...ion board and two screws fixing on terminal supporting board and the earth wire fixing screw Be aware to hold the c box complete to avoid falling after all screws are released Then the c box can be taken out Terminal cover for compressor Screw on sound prevention board Terminal connectors Screws on terminal supporting board Earth wire screw ...

Page 43: ...43 16 Technical Data 16 1 Operation Characteristic 16 1 1 CS RE9NKR CU RE9NKR Cooling Characteristic at Different Outdoor Air Temperature ...

Page 44: ...44 Cooling Characteristic at Different Piping Length ...

Page 45: ...45 Heating Characteristic at Different Outdoor Air Temperature ...

Page 46: ...46 Heating Characteristic at Different Piping Length ...

Page 47: ...47 16 1 2 CS RE12NKR CU RE12NKR Cooling Characteristic at Different Outdoor Air Temperature ...

Page 48: ...48 Cooling Characteristic at Different Piping Length ...

Page 49: ...49 Heating Characteristic at Different Outdoor Air Temperature ...

Page 50: ...50 Heating Characteristic at Different Piping Length ...

Page 51: ...51 17 Exploded View and Replacement Pars List 17 1 Indoor Unit CS RE9NKR CS RE12NKR ...

Page 52: ... COMPLETE 1 CWA28C2547 CWA28C2547 16 POWER SUPPLY CORD COMPLETE 1 CWA20C3067 CWA20C3067 17 MAIN PCB 1 CWA73C6074 CWA73C6075 18 SENSOR 1 CWA50C2883 CWA50C2883 19 INDICATOR HOLDER FRONT 1 CWD933546 CWD933546 20 INDICATOR PCB 1 CWA746860 CWA746860 21 CONTROL BOARD TOP COVER 1 CWH131523 CWH131523 22 CONTROL BOARD BACK COVER 1 CWH131526 CWH131526 23 REMOTE CONTROL 1 CWA75C3755 CWA75C3755 24 FRONT GRILL...

Page 53: ...53 17 2 Outdoor Unit CU RE9NKR CU RE12NKR ...

Page 54: ...TE SPRING 1 CWH71044 19 SOUND PROOF BOARD 1 CWH15K1034 CWH15K1060 20 SOUND PROOF MATERIAL 1 CWG302412 CWG302609 21 SOUND PROOF MATERIAL 1 CWG302471 CWG302682 22 STRAITER 1 CWB141023 CWB141023 23 REACTOR 1 G0C193J00011 G0C193J00014 24 CONTROL BOX COMPLETE 1 CWH14C9415 CWH14C9417 25 ELECTRONIC CONTROLLER DRED 1 CWA746902 CWA746902 26 TERMINAL BOARD ASS Y 1 CWA28K1248 CWA28K1248 27 TERMINAL BOARD ASS...

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