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Panasonic CS-RE12NKX, Service Manual

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Panasonic CS-RE12NKX Service Manual Download Page 46

46 

 
 

1. After front grille is taking off, remove the cover of control board and holder, 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, 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. 

 

 

 
 
1.  Separate the drain hose and the drain plate.             2.  Pull out the discharge grille slightly. 
 
 
 
 
 
 
 
 
 
 
 

Removal Procedure for Main Electronic Controller 

Removal Procedure for Main Electronic Controller 

Control board cover

 

Holder

 

Supporting 

Hook

 

Main PCB

 

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-RE12NKX

Page 1: ...ndoor Unit 25 10 3 Outdoor Unit 27 11 Service Mode 30 11 1 Auto OFF ON Button 30 11 2 Select Remote Control Transmission Code 30 11 3 Operate and Display of Remote Control 31 12 Operation Control 33 12 1 Basic Function 33 12 2 Indoor Fan Motor Operation 34 12 3 Outdoor Fan Motor Operation 34 13 Protection control 37 13 1 Protection Control For All Operations 37 This service information is designed...

Page 2: ...Piping Air Temperature Control Heating 40 14 Troubleshooting Guide 42 14 1 Refrigeration cycle system 42 14 2 Breakdown Self Diagnosis Function 43 15 Disassembly and Assembly Instructions 45 16 Exploded View and Replacement Pars List 48 16 1 Indoor Unit 48 16 2 Outdoor Unit 50 ...

Page 3: ...se it may cause electrical 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 ...

Page 4: ... pole disconnection incorporated in the fixed wiring is to be provided 1 Do not install the unit at place where leakage of flammable gas may occur In case gas leaks and accumulates at surrounding of the unit it may cause fire 2 Carry out drainage piping as mentioned in installation instructions If drainage is not perfect water may enter the room and damage the furniture 3 Do not touch outdoor unit...

Page 5: ...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 30 1 350k 8 40 1 600k Starting Current A 4 00 5 40 Type Hermetic Motor Hermetic Motor Motor Type BRUSHLESS 6 poles BRUSHLESS 6 poles Compressor Output Power W 750 900 Type Cross flow fan Cross flow fan Material AS GF30 A...

Page 6: ... 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 1 x 24 x 19 2 x 24 x 17 Outdoor Heat Exchanger Size W x H x D mm 661 x 504 x 18 19 703x 504 x 18 19 Material P P HONEY COMB P P HONEY COMB Ai...

Page 7: ...Hi 51 Lo HEATING Outdoor Noise Power Level 67 Max Current A Max Input Power W 10 5 2 280k Starting Current A 6 40 Type Hermetic Motor Motor Type BRUSHLESS 6 poles Compressor Output Power W 700 Type Cross flow fan Material AS GF30 Motor Type DC 8 poles Input Power W Output Power W 30 O Lo rpm 730 Lo rpm 800 Me rpm 1040 Speed COOLIN G Hi rpm 1320 O Lo rpm 740 Lo rpm 900 Me rpm 1060 Indoor Fan Speed ...

Page 8: ...door Heat Exchanger Size W x H x L mm 610 x 315 x 25 4 Fin Material Pre coated Fin Type Slit Fin Row x Stage x FPI 2 x 24 x 17 Outdoor Heat Exchanger Size W x H x D mm 703x 504 x 18 19 Material P P HONEY COMB Air Filter Type One touch Power Supply Indoor Power Supply Cord A 16A Thermostat Protection Device COOLING HEATING TEMPERATURE C DRY BULB WET BULB DRY BULB WET BULB Maximum 32 23 30 Indoor Op...

Page 9: ...ty Improvement o Random 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 Funct...

Page 10: ...ET button to restore the remote control s default setting POWER GREEN TIMER ORANGE QUIET GREEN INDICATOR POWERFUL RED Air inlet side Air outlet Air inlet rear OFF ON Airflow direction adjustment Timer setting Temperature setting Transmitter Fan speed selection Front Panel Air Filter Vertical airflow direction louver Horizontal airflow direction louver Receiver ...

Page 11: ...11 5 Dimensions 5 1 Indoor Unit Unit mm ...

Page 12: ...12 5 2 Outdoor Unit CU RE9NKX Unit mm CU RE12NKX CU RE15NKX ...

Page 13: ...13 6 Refrigeration Cycle Diagram CS CU RE9NKX CS CU RE12NKX CU CU RE15NKX COOLING HEATING ...

Page 14: ...14 7 Block Diagram CS CU RE9NKX CS CU RE12NKX ...

Page 15: ...15 CS CU RE15NKX ...

Page 16: ...16 8 Wiring Diagram CS CU RE9NKX ...

Page 17: ...17 CS CU RE12NKX ...

Page 18: ...18 CS CU RE15NKX ...

Page 19: ...19 9 Printed Circuit Board 9 1 Indoor Unit 9 1 1 Main Printed Circuit Board TOP VIEW BOTTOM VIEW ...

Page 20: ...20 9 1 2 Indicator receiver TOP VIEW BOTTOM VIEW ...

Page 21: ...21 9 2 Outdoor Unit 9 2 1 CU RE9NKX TOP VIEW BOTTOM VIEW ...

Page 22: ...22 CU RE12NKX TOP VIEW BUTTOM VIEW ...

Page 23: ...23 CU RE15NKX TOP VIEW BUTTOM VIEW ...

Page 24: ...cted 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 installed at a 10...

Page 25: ...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 26: ...26 10 2 3 Indoor Unit Installation ...

Page 27: ...t 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 unit Please make flare after inserting flare nut locate at joint portion of tube assembly onto the copper pipe In case of using long piping Connect the piping Align the center of piping and sufficiently tighten the fl...

Page 28: ... 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 IN ORDER TO AVOID REFRIGEANT GAS LEAKAG 5 Disconnect the charging horse from the vacuum pump and from the service port of the ...

Page 29: ...lamper 4 Attach the control board cover back to the original position with the screw 5 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 Outdoor Unit Installation Diagram Please warp the insulated piping end to prevent water from going inside the piping 2 ...

Page 30: ...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 with same transmiss...

Page 31: ... changes as follows by pressing the AIR SWING button 11 3 5 AIR SWING button To adjust vertical airflow directions by pressing AIR SWING button 5 options 11 3 6 QUIET AND POWERFULL button Start Quiet operation Press QUIET button until QUIET displaying on remote control display to identify Quiet mode operating Start POWERFUL operation Press POWERFUL button until POWERUL displays on remote control d...

Page 32: ...etting can operate only once If the OFF ON button on the remote control or the 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 th...

Page 33: ... Dry Operation 12 1 3 1 Thermostat control The same as Cooling mode 12 1 4 Heating operation 12 1 4 1 Thermostat control Compressor is OFF when Intake Air Temperature Internal Setting Temperature 2 0 Compressor is ON after waiting for 3 minutes if the Intake Air Temperature Internal Setting Temperature Compressor OFF point 12 1 5 Automatic Operation Once AUTO mode is selected operation mode is det...

Page 34: ...EATING rpm 1300 1140 1060 980 900 740 ii Auto Fan Speed Cooling Soft Dry Mode According to room temperature and setting temperature indoor fan speed is determined automatically The indoor fan will operate according to pattern below Fan speed Higher Medium Lower A b c d e f g h a b B Feedback control Immediately after the fan motor started feedback control is performed once every second During fan ...

Page 35: ...de 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 operation To cooling or heating the room faster comparing to normal operation The POWERFUL operation can be ac...

Page 36: ...ation Panel LED POWER TIMER QUIET POWERFUL Color Green Orange GREEN RED Light ON Operation ON Timer setting ON Quiet mode ON Powerful mode ON Light OFF Operation OFF Timer setting OFF Quiet mode OFF Powerful mode OFF Note If POWER LED blinks the possible operation of the unit is operating mode judgment or ON timer sampling If Timer LED blinks there is an abnormal operation occurs 12 3 7 Timer cont...

Page 37: ... not stop within 30 seconds in a normal operation 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 out...

Page 38: ...ssor discharge temperature The change of frequency is as below 13 1 6 Low Operation Frequency Protection Control When the compressor operate frequency lower than 24Hz continued for 240 minutes the operation frequency will be changed to 23Hz for 2 minutes 13 1 7 Low Operation Frequency Protection Control If all following conditions exists the compressor will run with the frequency of 30 Hz Models R...

Page 39: ...uency will adjust base on outdoor air temperature RE9NKX RE12NKX RE15NKX 13 2 2 Freeze Prevention Control 1 Frequency of the compressor For prevention of freezing of the indoor evaporator the frequency of the compressor will be changed according to the indoor piping temperature 2 Indoor Fan Control Indoor fan speed changes according to the indoor piping temperature 13 2 3 Dew Prevention Control To...

Page 40: ...operation the indoor fan will run at the following speed when the compressor stops 3 Hot Start When the heating operation starts the indoor fan stops and the compressor runs with a certain frequency This is to prevent the cold airflow from blowing If the piping temperature rises to 19 and the indoor fan speed varies with the indoor piping temperature the hot start control is stopped 1 2 3 4 5 6 7 ...

Page 41: ...41 13 3 2 Overload Protection Control The frequency for the compressor is determined by indoor piping temperature Indoor piping temp RE9NKX RE12NKX RE15NKX Indoor piping temp Indoor piping temp ...

Page 42: ...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 43: ...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 44: ...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 45: ...Failure to heed this caution may result in electric shocks 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 Grille Cap Scr...

Page 46: ...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 1 Separate the drain hose and the drain plate 2 Pull out the discharge grille slightly Removal Procedure for Main Electronic Controller Removal Procedure for Main Electronic Controller Control ...

Page 47: ...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 Cross Flow Fan Fixing Screw Fixing board Bearing Fan motor ...

Page 48: ...48 16 Exploded View and Replacement Pars List 16 1 Indoor Unit CS RE9NKX CS RE12NKX CS RE15NKX ...

Page 49: ...46 CWA28C2547 CWA28C2546 17 POWER SUPPLY CORD COMPLETE 1 CWA20C3068 CWA20C3068 CWA20C3074 18 MAIN PCB 1 CWA73C5921 CWA73C5922 CWA73C5923 19 SENSOR 1 CWA50C2883 CWA50C2883 CWA50C2883 20 INDICATOR HOLDER 1 CWD933546 CWD933546 CWD933546 21 INDICATOR PCB 1 CWA746860 CWA746860 CWA746860 22 CONTROL BOARD TOP COVER 1 CWH131523 CWH131523 CWH131523 23 CONTROL BOARD BACK COVER 1 CWH131526 CWH131526 CWH13152...

Page 50: ...50 16 2 Outdoor Unit CU RE9NKX ...

Page 51: ... 1 CWB111026 17 TERMINAL COVER 1 CWH171041 18 SOUND PROOF BOARD 1 CWH15K1048 19 SOUND PROOF MATERIAL 1 CWG302731 20 SOUND PROOF MATERIAL 1 CWG302732 21 TUBE NOISE SUPPRESSOR 1 CWB141023 22 REACTOR 1 G0C193J00014 23 CONTROL BOX COMPLETE 1 CWH14C9273 24 TERMINAL BOARD ASS Y 1 CWA28K1248 25 SENSOR COMPLETE COMP 1 CWA50C2848 26 SENSOR COMPLETE PIPING 1 CWA50C2835 27 TUBE ASS Y CAPILLARY 1 CWT01C6046 2...

Page 52: ...52 CU RE12NKX CU RE15NKX ...

Page 53: ...AL COVER 1 CWH171048 CWH171048 18 SOUND PROOF BOARD 1 CWH15K1034 CWH15K1034 19 SOUND PROOF MATERIAL 1 CWG302703 CWG302609 20 SOUND PROOF MATERIAL 1 CWG302605 CWG302605 21 SOUND PROOF MATERIAL 1 CWG302693 22 TUBE NOISE SUPPRESSOR 1 CWB141023 CWB141023 23 REACTOR 1 G0C103J00034 G0C193J00011 24 CONTROL BOX COMPLETE 1 CWH14C9612 CWH14C9270 25 TERMINAL BOARD ASS Y 1 CWA28K1248 CWA28K1248 26 SENSOR COMP...

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