Panasonic CS-A12HKD Service Manual Download Page 54 | Manualshive

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54

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 fan.
The normal outlet air temperature and pressure of the
refrigeration cycle depends on various conditions, the standard
values for them are shown in the table to the right.

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Summary of Contents for CS-A12HKD

Page 1: ...KD TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions 2 2 Specifications 5 2 1 CS A7HKD CU A7HKD 5 2 2 CS A9HKD CU A9HKD 7 2 3 CS A12HKD CU A12HKD 9 3 Features 11 4 Location of Controls and Components 12 4 1 Indoor Unit 12 4 2 Outdoor Unit 12 4 3 Outdoor Unit 12 5 Dimensions 13 5 1 Indoor Unit Remote Control 13 5 2 Outdoor Unit 14 6 Refrigeration Cycle Diagram 15 7 Block Diagram 16 7 1 CS A7HKD CU A...

Page 2: ...n Control 49 13 14 Deice Control 50 14 Servicing Mode 52 14 1 Auto OFF ON Button 52 14 2 Select Remote Control Transmission Code 52 14 3 Remote Control Button 53 15 Troubleshooting Guide 54 15 1 Refrigeration cycle system 54 16 Disassembly and Assembly Instructions 56 16 1 Indoor Electronic Controllers and Control Board Removal Procedures 56 16 2 Indoor Fan Motor and Cross Flow Fan Removal Procedu...

Page 3: ...1 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 electric shock in case equipment breakdown or insulation breakdown 12 When connecting the piping do not allow air or any substances other than the specified refrigerant to enter the refrigeration cycle Otherwise this may lower the capacity ca...

Page 4: ...roved power plug with earth pin for the connection to the socket ii Power supply connection to a circuit breaker for the permanent connection Use an approved circuit breaker for the permanent connection It must be a double pole switch with a minimum 3 5 mm contact gap 8 Do not release refrigerant during piping work for installation servicing reinstallation and during repairing a refrigerant parts ...

Page 5: ...ing 7 0 250 Heating 6 9 240 Hi m3 m ft3 m Cooling 7 8 280 Heating 9 0 320 Cooling 29 5 1040 30 0 1060 SHi m3 m ft3 m Cooling 9 1 320 Refrigerant Control Device Capillary Tube Refrigerant Oil Charged cm3 ATMOS NM56M or SUNISO 4GDID 290cm3 Refrigerant Charged R22 kg oz 0 71 25 0 Dimension Height mm inch 280 11 1 32 510 20 3 32 Width mm inch 799 31 15 32 650 25 19 32 Depth mm inch 183 7 7 32 230 9 1 ...

Page 6: ... Heat rpm 920 920 Hi Cool Heat rpm 1030 1200 800 830 SHi Cool Heat rpm 1200 Heat Exchanger Fin material Aluminium Pre Coat Aluminium Blue Coat Fin Type Slit Fin Corrugate Fin Row Stage FPI 2 15 21 1 19 17 Size W H L mm inch 610 315 25 4 22 483 576 Air Filter Type Material Polypropelene Style One touch Item Unit Power Source Phase Voltage Cycle ø Single Single V 220 230 Hz 50 50 Input power Cooling...

Page 7: ...ontrol Device Capillary Tube Refrigerant Oil Charged cm3 ATMOS M60 or SUNISO 4GDID 350cm3 Refrigerant Charged R22 kg oz 0 67 23 7 Dimension Height mm inch 280 11 1 32 510 20 3 32 Width mm inch 799 31 15 32 650 25 19 32 Depth mm inch 183 7 7 32 230 9 1 16 Net Weight kg lbs 9 20 27 60 Pipe Diameter Gas mm inch 9 52 3 8 Liquid mm inch 6 35 1 4 Height Difference m ft 5 16 4 Pipe Length Range m ft 3 9 ...

Page 8: ...e Coat Fin Type Slit Fin Corrugate Fin Row Stage FPI 2 15 21 1 19 17 Size W H L mm inch 610 315 25 4 22 483 576 Air Filter Type Material Polypropelene Style One touch Item Unit Power Source Phase Voltage Cycle ø Single Single V 220 230 Hz 50 50 Input power Cooling W 830 860 Heating W 700 740 Starting Current A 18 18 Running Current Cooling A 3 9 3 9 Heating A 3 3 3 3 Maximum Current A 5 1 5 1 Powe...

Page 9: ...Control Device Capillary Tube Refrigerant Oil Charged cm3 ATMOS NM56M or SUNISO 4GDID 350cm3 Refrigerant Charged R22 kg oz 1 01 35 7 Dimension Height mm inch 280 11 1 32 540 21 9 32 Width mm inch 799 31 15 32 780 30 23 32 Depth mm inch 183 7 7 32 289 11 13 32 Net Weight kg lbs 9 20 34 75 Pipe Diameter Gas mm inch 12 70 1 2 Liquid mm inch 6 35 1 4 Height Difference m ft 5 16 4 Pipe Length Range m f...

Page 10: ... Coat Fin Type Slit Fin Corrugate Fin Row Stage FPI 2 15 21 2 24 17 Size W H L mm inch 610 315 25 4 36 38 504 713 684 Air Filter Type Material Polypropelene Style One touch Item Unit Power Source Phase Voltage Cycle ø Single Single V 220 230 Hz 50 50 Input power Cooling W 1 08 1 12 Heating W 1 09 1 12 Starting Current A 20 20 Running Current Cooling A 5 1 5 1 Heating A 5 2 5 1 Maximum Current A 6 ...

Page 11: ...er CS CU A12HK long piping up to 15 meter Easy to use remote control Quality Improvement Random auto restart after power failure for safety restart operation Gas leakage protection Prevent compressor reverse cycle Inner protector to protect Compressor Noise prevention during soft dry operation Blue Coated Condenser for high resistance to corrosion Operation Improvement Quiet mode to reduce the ind...

Page 12: ...12 4 Location of Controls and Components 4 1 Indoor Unit 4 2 Outdoor Unit 4 3 Outdoor Unit ...

Page 13: ...13 5 Dimensions 5 1 Indoor Unit Remote Control 5 1 1 CS A7HKD CS A9HKD CS A12HKD ...

Page 14: ...14 5 2 Outdoor Unit 5 2 1 CU A7HKD CU A9HKD 5 2 2 CU A12HKD ...

Page 15: ...15 6 Refrigeration Cycle Diagram ...

Page 16: ...16 7 Block Diagram 7 1 CS A7HKD CU A7HKD CS A9HKD CU A9HKD ...

Page 17: ...17 7 2 CS A12HKD CU A12HKD ...

Page 18: ...ndings Note Resistance at 25 C of ambient temperature Resistance of Compressor Windings Note Resistance at 20 C of ambient temperature MODEL CS A7HK CS A9HK CONNECTION CWA921373 BLUE YELLOW 390 0 Ω YELLOW RED 394 0 Ω MODEL CU A7HK CU A9HK CONNECTION CWA951526 BLUE YELLOW 309 Ω YELLOW RED 210 Ω MODEL CU A7HK CU A9HK CONNECTION 2RS122D5BG02 2PS156D3BB02 C R 5 193 Ω 3 501 Ω C S 5 557 Ω 3 405 Ω ...

Page 19: ... Windings Note Resistance at 25 C of ambient temperature Resistance of Compressor Windings Note Resistance at 20 C of ambient temperature MODEL CS A12HK CONNECTION CWA921373 BLUE YELLOW 390 0 Ω YELLOW RED 394 0 Ω MODEL CU A12HK CONNECTION CWA951117J BLUE YELLOW 230 Ω YELLOW RED 255 Ω MODEL CU A12HK CONNECTION 2PS206D2BA02 C R 3 207 Ω C S 3 256 Ω ...

Page 20: ...20 9 Electronic Circuit Diagram ...

Page 21: ...21 10 Printed Circuit Board 10 1 Main Printed Circuit Board ...

Page 22: ...22 10 2 Power Printed Circuit Board TOP VIEW BOTTOM VIEW ...

Page 23: ...23 10 3 Indicator Printed Circuit Board 10 4 Patrol Printed Circuit Board ...

Page 24: ...that heat radiation from the condenser 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 ...

Page 25: ... method is by putting measuring tape at position as shown in the diagram above The hole centre is obtained by measuring the distance namely 150 mm and 125 mm for left and right hole respectively Drill the piping hole at either the right or the left and the hole should be slightly slanted to the outdoor side 11 3 2 TO DRILL A HOLE IN THE WALL AND INSTALL A SLEEVE OF PIPING 1 Insert the piping sleev...

Page 26: ...26 3 For the embedded piping This can be used for left rear piping and left bottom piping also ...

Page 27: ...HKD C9HKD C12HKD or 5 A7HKD A9HKD A12HKD x 1 5 mm2 flexible cord type designation 245 IEC 57 or heavier cord Ensure the colour of wires of outdoor unit and the terminal Nos are the same to the indoor s respectively Earth lead wire shall be longer than the other lead wires as shown in the figure for the electrical safety in case of the slipping out of the cord from the anchorage Secure the cable on...

Page 28: ...torque as stated in the table Connecting The Piping To Outdoor Unit Decide piping length and then cut by using pipe cutter Remove burrs from cut edge Make flare after inserting the flare nut locate at valve onto the copper pipe Align center of piping to valves and then tighten with torque wrench to the specified torque as stated in the table CUTTING AND FLARING THE PIPING 1 Please cut using pipe c...

Page 29: ...ten the service port caps of the 3 way valve at a torque of 18 NO m with a torque wrench 7 Remove the valve caps of both of the 2 way valve and 3 way valve Position both of the valves to OPEN using a hexagonal wrench 4 mm 8 Mount valve caps onto the 2 way valve and the 3 way valve Be sure to check for gas leakage 11 4 4 CONNECT THE CABLE TO THE OUTDOOR UNIT 1 Remove the control board cover from th...

Page 30: ...ation at pipe connection portion as mentioned in Indoor Outdoor Unit Installation Diagram Please wrap the insulated piping end to prevent water from going inside the piping 2 If drain hose or connecting piping is in the room where dew may form please increase the insulation by using POLY E FOAM with thickness 6 mm or above ...

Page 31: ...room temperature reaches the setting temperature set on the remote control The remote control setting temperature which takes the reading of intake air temperature sensor can be adjusted from 16 C to 30 C During heating operation the compressor will stop running and restart as shown in below figure 12 1 1 Heating Operation Time Diagram ...

Page 32: ...perature reaches the setting temperature set on the remote control The remote control setting temperature which takes the reading of intake air temperature sensor can be adjusted from 16 C to 30 C During cooling operation the compressor will stop running and restart as shown in below figure 12 2 1 Cooling Operation Time Diagram ...

Page 33: ...egins Soft Dry will be switched ON for a maximum 10 minutes then Soft Dry operation will be turned OFF for a minimum 6 minutes After that the Soft Dry operation will be ON and OFF based on the setting temperature as shown in below figure However after 3 minutes of compressor off during Soft Dry OFF within 6 minutes Soft Dry restart control the indoor unit will start to operate at normal Cooling mo...

Page 34: ...eration mode will be determine again for judgement after 1 hour of operation if the room temperature reaches to set temperature and compressor off time is over 7 minutes 30 seconds continuously Automatic Set Temperature For each operation set temperature will automatically set as shown below However it can be selected 2 C higher or 2 C lower from standard set temperature by pressing the Room Tempe...

Page 35: ...mperature can be increased by 2 C permanently by open the circuit of JX03 at indoor electronic controller 12 5 Indoor Fan Speed Control Indoor Fan Speed can be set using remote control 12 5 1 Fan Speed Rotation Chart Fan Speed rpm CS A7HKD CS A9HKD CS A12HKD S Hi 1200 1310 1320 Hi 1030 1210 1300 Me 920 1000 1120 H Lo 840 890 860 C Lo 780 830 800 Lo 750 780 750 S Lo 700 750 700 SS Lo 300 300 300 Q ...

Page 36: ...an will increase fan speed gradually for deodorizing purpose 3 For the first time the compressor operate indoor fan will be switched to Hi fan speed from Lo after 70 seconds from the start of compressor This cause the room temperature to achieve the setting temperature quickly 4 During compressor stop indoor fan will operate at Lo for the beginning 3 minutes to prevent higher volume of refrigerant...

Page 37: ... Speed selection button at the remote control There are 3 types of fan speed settings Lo Me Hi 12 6 Outdoor Fan Speed Control There is only one speed for outdoor fan motor When the air conditioner is turned on the compressor and the outdoor fan will operate simultaneously Likewise both compressor and outdoor fan will stop at the same time if the unit is turned off 12 7 Vertical Airflow Direction C...

Page 38: ...der Cooling and Soft Dry operation mode Cooling and Soft Dry Operation Heating Operation 12 8 Horizontal Airflow Direction Control The horizontal airflow direction louvers can be adjusted manually by hand 12 9 Powerful Operation To achieve the setting temperature quickly Cooling and Soft Dry Operation condition When Powerful operation is set the setting temperature will be automatically decreased ...

Page 39: ...tton is pressed Stopped by OFF ON operation button Timer OFF activates Operation mode is changed 12 10 Quiet Operation For Cooling Operation or cooling region of Soft Dry Operation To provide quiet cooling operation condition compare to normal operation Once the Quiet Mode is set at the remote control the Quiet Mode LED illuminated The sound level will reduce around 2 dB A for Lo fan speed or 3 dB...

Page 40: ...tion condition When the Quiet Mode is set at the remote control Quiet Mode LED illuminates The sound level will reduce either around 2 dB Lo or 3 dB Hi Me against the present sound level operation Quiet setting of fan speed rpm refer to Indoor Fan Speed Control Manual Fan Speed Rpm control during Lo Me Hi Cool Auto Fan Speed Rpm control depends on the piping air temperature sensor of Indoor heat e...

Page 41: ...ON Timer or OFF Timer setting will not be cancelled 2 To cancel the previous timer setting press CANCEL button 3 To activate the previous timer setting press SET button 4 If main power supply is switched off the Timer setting will be cancelled 12 12 Random Auto Restart Control If there is a power failure during operation the air conditioner will automatically restart after 3 to 4 minutes when the ...

Page 42: ...ling only operation Patrol button is pressed Patrol operation stops condition when any of the following condition is fulfilled When OFF ON button is pressed During any operation with Patrol Patrol button is pressed again When e ion button is pressed When OFF Timer activates Patrol operation disable To disable the Patrol Operation during unit starts default with OFF ON button press Patrol button an...

Page 43: ...splay if remote control does not operate for 30 seconds e ion Control e ion operation starts condition When dirtiness at level 2 Patrol LED turns red e ion operation time If dirtiness level improves from level 2 to level 1 Patrol LED turns from red to orange the unit carries out level change after 60 seconds When dirtiness level returns to level 0 Patrol LED turns blue continuously for 11 minutes ...

Page 44: ...n operation resume immediately Error Detection Control The Patrol error detection control starts once the power is supplied to Patrol sensor However the error will display when the Patrol operation is ON Error detection method If the Patrol sensor is opened circuit continuously for 6 hours Patrol sensor error occurs However the error will display only when the Patrol operation is ON Patrol Sensor ...

Page 45: ...ake temperature 40 C continuously for 30 minutes Indoor fan control During any operation mode combines with e ion operation fan speed follows respective operation mode During e ion individual operation only Auto Fan Speed and no Powerful operation is allowed Even if Fan Speed button is pressed no signal is sent to air conditioner and no change on LCD display Auto Fan Speed for e ion operation swit...

Page 46: ...udged abnormal discharge and stops power supplies to the active e ion Air Purifying system Abnormal discharge is caused by ionizer or filter s high voltage power supply short circuits due to water or dust adhesion and so forth When abnormal discharge occurred every 30 minutes the unit supplies power to the active e ion Air Purifying system When abnormal discharge occurs for 24 times continuously e...

Page 47: ...ture has reached the thermo off temperature However force stop by pressing the OFF ON operation button at the remote control is permitted The reason for the compressor to force operate at minimum 60 seconds is to allow the refrigerant oil run in a full cycle and return back to the outdoor unit 13 4 Starting current Control When the compressor outdoor fan motor and indoor fan motor are simultaneous...

Page 48: ... adjusted accordingly in this control Fan speed will be increased slowly if the unit is in quiet mode but no change in normal cooling mode The angle of horizontal louver will be changed as below figure Dew prevention stop condition Remote control setting temperature is more than 25 C Fan speed is not set to CLo or QLo Select Powerful operation 13 8 30 Minutes Time Save Control The compressor will ...

Page 49: ...ion for 5 minutes This is to prevent the refrigerant flow process sound for being occur 13 11 Outdoor Fan Motor Control When compressor stops reaches room temperature outdoor fan will operate for 30 seconds forced operation This is to release the heat and to obtain the lowest pressure as fast as possible 13 12 Hot Start Control Hot Start Control is to prevent cool air discharge into the room when ...

Page 50: ...g temperature drops to 3 C TRS CLOSE or less for 50 sec continuously during compressor is in operation deice will start There is no detection during Outdoor Fan stops Overload Deice During heating operation if the outdoor Fan OFF duration due to overload protection control is accumulated up to 60 minutes and after compressor starts for 1 minutes deice starts Deice ends when 1 12 minutes after deic...

Page 51: ...51 Normal Deice Time Diagram Overload Deice Time Diagram ...

Page 52: ...occur at to identify the starting of Remote Control Receiving Sound Off On Mode Press Auto OFF ON button to toggle remote control receiving sound Short beep Turn ON remote control receiving sound Long beep Turn OFF remote control receiving sound After Auto OFF ON button is pressed the 20 seconds counter for Remote Control Receiving Sound OFF ON Mode is restarted 14 2 Select Remote Control Transmis...

Page 53: ...und will be heard LCD returns to original display after 2 seconds LCD returns to original display if remote control does not operate for 30 seconds 14 3 2 CLOCK BUTTON To change the remote control s time format Press for more than 5 seconds 14 3 3 RESET To clear and restore the remote control setting to factory default Press once to clear the memory 14 3 4 TIMER To change indoor unit indicator s L...

Page 54: ... problems before inspecting the refrigeration cycle Such problems include insufficient insulation problem with the power source malfunction of a compressor and a fan The normal outlet air temperature and pressure of the refrigeration cycle depends on various conditions the standard values for them are shown in the table to the right ...

Page 55: ...ency of the outdoor unit Inefficient compression Nature of fault Symptom Electric current during operation becomes approximately 20 lower than the normal value Insufficient compressing of a compressor The discharge tube of the compressor becomes abnormally hot normally 70 to 90 C The difference between high pressure and low pressure becomes almost zero Electric current reaches a high level abnorma...

Page 56: ...s WARNING Cautions When handling electronic controller be careful of electrostatic discharge Be sure to return the wiring to its original position There are many high voltage components within the heat sink cover so never touch the interior during operation Wait at least two minutes after power has been turned off ...

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Page 58: ...58 16 2 Indoor Fan Motor and Cross Flow Fan Removal Procedures ...

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Page 60: ...60 17 Technical Data 17 1 Thermostat Characteristics Cooling Soft Dry Heating ...

Page 61: ...61 17 2 Operation Characteristics 17 2 1 CS A7HKD CU A7HKD ...

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Page 65: ...65 17 2 2 CS A9HKD CU A9HKD ...

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Page 69: ...69 17 2 3 CS A12HKD CU A12HKD ...

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Page 73: ...8 Exploded View and Replacement Parts List 18 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 74: ...AP DRAIN TRAY 1 CWH521096 18 HORIZONTAL VANE COMPLETE 1 CWE24C1183 19 BACK COVER CHASSIS 1 CWD932454 20 CONTROL BOARD CASING 1 CWH102321 21 TERMINAL BOARD COMPLETE 1 CWA28C2312 CWA28C2313 22 P S CORD W OUT PLUG 1 CWA20C2590 23 ELECTRONIC CONTROLLER MAIN 1 CWA73C2989 CWA73C2991 CWA73C2990 24 ELECTRONIC CONTROLLER POWER 1 CWA744529 25 SENSOR COMPLETE 1 CWA50C2122 CWA50C2401 26 CONTROL BOARD FRONT CO...

Page 75: ...75 18 2 Outdoor Unit 18 2 1 CU A7HKD CU A9HKD 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 76: ... 18 OVERLOAD PROTECTOR 1 CWA121050J CWA121210J 19 HOLDER O L P 1 CWH7041200 20 TERMINAL COVER 1 CWH171011 21 NUT TERMINAL COVER 1 CWH7080300J 22 SOUND PROOF BOARD 1 CWH151074 24 TERMINAL BOARD ASS Y 1 CWA28K1021J 25 CAPACITOR COM 1 DS371206CPNA F0GAH306A004 26 HOLDER CAPACITOR 1 CWH301038 CWH301035 27 CAPACITOR F M 1 DS441205NPQA 28 CABINET SIDE PLATE L 1 CWE041110A 29 CABINET SIDE PLATE COMP 1 CW...

Page 77: ...77 18 2 2 CU A12HKD 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 78: ...ECTOR 1 CWA121251 19 HOLDER O L P 1 CWH7041200 20 TERMINAL COVER 1 CWH171011 21 NUT TERMINAL COVER 1 CWH7080300J 22 SOUND PROOF BOARD 1 CWH151023 24 TERMINAL BOARD ASS Y 1 CWA28K1034J 25 CAPACITOR COMP 1 F0GAH356A001 26 HOLDER CAPACITOR 1 CWH30060 27 CAPACITOR F M 1 DS441205NPQA 28 CABINET SIDE PLATE L 1 CWE041248A 29 CABINET SIDE PLATE COMP 1 CWE04C1118 30 CABINET FRONT PLATE ASS Y 1 CWE06K1034 3...

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