Panasonic CS-C12EKF Service Manual Download Page 36 | Manualshive

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13 Troubleshooting Guide

13.1. 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 refrigera-
tion 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-C12EKF

Page 1: ...on Diagram 13 8 1 CS C12EKF CU C12EKF 13 9 Printed Circuit Board 14 9 1 Indoor Unit 14 9 2 Indicator 16 10 Installation Instruction 17 10 1 Select The Best Location 17 10 2 Indoor Unit 18 10 3 Outdoor Unit 20 11 Operation and Control 23 11 1 Cooling Operation 23 11 2 Soft Dry Operation 24 11 3 Automatic Operation 25 11 4 Operation Control 26 11 5 Indoor Fan Speed Control 29 11 6 Outdoor Fan Speed ...

Page 2: ...Instructions 38 14 1 Indoor Electronic Controllers Removal Procedures 38 14 2 Indoor Fan Motor and Cross Flow Fan Removal Procedures 40 15 Technical Data 42 15 1 Thermostat Characteristics 42 15 2 Operation Characteristics 43 15 3 Cooling Capacity perfomance Data 45 16 Exploded View and Replacement Parts List 47 16 1 Indoor Unit 47 16 2 Outdoor Unit 49 ...

Page 3: ...nstallation instruction An independent circuit and sin gle outlet must be used If electrical circuit capacity is not enough or defect found in electrical work it will cause electrical shock or fire 6 Use the specified cable and connect tightly for indoor outdoor connection Connect tightly and clamp the cable so that no external force will be acted on the terminal If connection or fixing is not per...

Page 4: ... supply is prohibited 1 Power supply connection to the receptacle using a power plug Use an approved power plug with earth pin for the connection to the socket 2 Power supply connection to a circuit breaker for the permanent connection Use an approved circuit breaker for the permanent connec tion It must be a double pole switch with a minimum 3 5 mm contact gap 3 Do not release refrigerant during ...

Page 5: ... L Liquid side 1 4 Drain Hose Inner diameter mm 16 Length mm 650 Power Cord Length m 2 0 Number of core wire 3 1 5 mm2 Dimensions Height inch mm 11 1 32 280 21 1 4 540 Width inch mm 31 15 32 799 30 23 32 780 Depth inch mm 7 7 32 183 11 3 8 289 Net Weight lb kg 18 8 82 37 Compressor Description Rotary 1 cylinder rolling piston type Motor Type Induction 2 poles Rated Output W 1000 Air Circulation De...

Page 6: ...tat Protection Device 2 Stage Overload Protector Capillary Tube Length mm 830 Flow Rate I min 14 0 Inner Diameter mm 1 7 Air Filter Material P P Style Honeycomb Capacity Control Capillary Tube Compressor Capacitor μF VAC 35 μF 370 440VAC Fan Motor Capacitor μF VAC 1 5 μF 440VAC 2 0 μF 440VAC Unit Indoor unit Outdoor unit ...

Page 7: ...s enhance the ability to col lect dust and dirt in the air Auto Refresh Deo Regenerated the deodorizing performance so it stays the same as when it was first used 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...

Page 8: ...8 4 Location of Controls and Components 4 1 Product Overview 4 1 1 Indoor Unit 4 1 2 Outdoor Unit 4 1 3 Remote Control ...

Page 9: ...9 5 Dimensions 5 1 Indoor Unit Remote Control 5 1 1 CS C12EKF ...

Page 10: ...10 5 2 Outdoor Unit 5 2 1 CU C12EKF ...

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

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

Page 13: ...Motor Windings Note Resistance at 26 C of ambient temperature Resistance of Compressor Windings Note Resistance at 20 C of ambient temperature MODEL CU C12EKF CONNECTION CWA951120 BLUE YELLOW 200 4 Ω YELLOW RED 252 5 Ω MODEL CU C12EKF CONNECTION 2KS210D3BA02 C R 1 930 Ω C S 2 449 Ω ...

Page 14: ...14 9 Printed Circuit Board 9 1 Indoor Unit TOP VIEW ...

Page 15: ...15 BOTTOM VIEW ...

Page 16: ...16 9 2 Indicator TOP VIEW BOTTOM VIEW ...

Page 17: ... the unit to prevent direct sunlight or rain be careful 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...

Page 18: ...other method is by putting measur ing 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 10 2 2 To Drill A Hole In The Wall And Install A Sleeve Of Piping 1 Insert the piping...

Page 19: ...e embedded piping Pull out the piping and drain hose How to keep the cover Insert the connecting cable Install the Indoor unit Secure the Indoor Unit This can be used for left rear piping left bottom piping also ...

Page 20: ...o the control board with the holder clamper 10 3 Outdoor Unit 10 3 1 Install The Outdoor Unit 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 horizon tally by bolt nut ø10 mm 2 When installing at roof please consider strong wind and earthquake Please fasten the installation stand firmly ...

Page 21: ...oid the metal powder entering the pipe 3 Please make flare after inserting the flare nut onto the copper pipes 10 3 3 Air Purging Of The Pipings And Indoor Unit The remaining air in the Refrigeration cycle which contains moisture may cause malfunction on the compressor 1 Remove the caps from the 2 way and 3 way valves 2 Remove the service port cap from the 3 way valves 3 To open the valve turn the...

Page 22: ... back to the original posi tion with the screw 10 3 5 Pipe Insulation 1 Please carry out insulation 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 thick...

Page 23: ...the 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 cooling operation the compressor will stop running and restart as shown in below figure 11 1 1 Cooling Operation Time Diagram ...

Page 24: ...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 25: ... at determined operation mode until it is switched off using remote control with the setting temper ature as shown in below table The setting temperature for all the operations can be changed one level up or one level down from the standard temperature as shown in below table by pressing on the temperature up or temperature down button at remote control The operation mode judging temperature and s...

Page 26: ... the intake air temperature falls between the compres sor ON temperature A and compressor OFF temperature B during the period This phenomenon is to reduce the built up humidity inside a room 11 4 3 60 Seconds Forced Operation Once the air conditioner is turned on the compressor will not stop within 60 seconds in a normal operation although the intake air temperature has reached the thermo off temp...

Page 27: ...re Compressor will turn off when indoor temperature falls below 2 C for more than 4 minutes It will restart again when indoor heat exchanger temperature rises to 10 C Restart control Time Delay Safety Control will be applied in this control 11 4 6 Compressor Reverse Rotation Protection Control If the compressor is operating continuously for 5 minutes or longer and the temperature difference betwee...

Page 28: ...ngly 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 Note A Normal operation angle of rotation B Dew prevention angle of rotation Horizontal Louver Angle During dew prevention the horizontal louver angle in Auto control are as below figure During dew prevention the ho...

Page 29: ...c Fan Speed Control When set to Auto Fan Speed the fan speed is adjusted between maximum and minimum setting as shown in the table Fan speed rotates in the range of Hi and Me Deodorizing Control will be activated Speed Fan Speed rpm CS C12EKF S Hi 1320 Hi 1270 Me 1060 H Lo 960 C Lo 900 Lo 850 S Lo 820 Q Hi 1170 Q Me 960 Q Lo 800 ...

Page 30: ...ser noise envi ronment after 70 seconds from the restart of compressor Auto Fan Speed during Soft Dry operation 1 Indoor fan will rotate alternately between off and Lo 2 At the beginning of each compressor start operation indoor fan will increase fan speed gradually for deodorizing purpose 3 When compressor at turn off condition for 6 minutes indoor fan will start fan speed at Lo to circulate the ...

Page 31: ...ation using the remote control the discharge vent is reset and stop at the closing position 11 8 Horizontal Airflow Direction Control The horizontal airflow direction louvers can be adjusted manually by hand 11 9 Powerful Operation To achieve the setting temperature quickly When Powerful operation is set the setting temperature will be automatically decreased 3 C internally against the present set...

Page 32: ... Hi Me fan speed against the present operation sound level Dew formation become severe at Quiet Lo cool therefore Quiet Lo cool is operated only 1hr 30 min 1hr QLo 30 min QLo 50 rpm After that it goes back to Lo cool However Quiet LED remains on Manual Airflow Direction RPM control during Lo cool RPM control during Hi Me cool Auto Fan Speed Quiet operation stops when Quiet button is pressed again ...

Page 33: ...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 11 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 power is resumed It will start with previous operation mode and airflow direction If there ...

Page 34: ...d 12 1 2 Select Remote Control Transmission Code There are 4 type of remote control transmission code could be selected and stored in EEPROM of indoor unit The indoor unit will only operate when received signal with same transmission code from remote control This could prevent signal interference when there are 2 or more indoor unit installed nearby together To change remote control transmission c...

Page 35: ...peration and display changes as Celsius or Fahrenheit Above condition will not happen when Timer is set 12 3 Test Mode Timer Table Test Mode Name Time When test point Remarks Short circuited 1 hr 1 min Real Timer 10 min 10 sec 1 min 1 sec Timer Delay Safety Control 2 min 58 sec 0 sec Forced Operation 60 sec 0 sec Timer Save Control 7 min 4 2 sec Anti Freezing 4 min 0 sec Auto Mode Judgement 20 sec...

Page 36: ...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 refrigera tion cycle depends on various conditions the standard values for them are shown in the table to the right ...

Page 37: ...logged capillary tube or Strainer Short circuit in the indoor unit Heat radiation deficiency 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 pre...

Page 38: ...s Remove the 2 caps and 2 screws at the bottom of the Front Grille Fig 1 Fig 1 Remove the Front Grille Complete Fig 2 Fig 2 Release the taps on the top and on the right side of Control Board Front Cover Fig 3 Then remove the Control Board Front Cover Fig 3 Remove the Indicator Complete Fig 3 Fig 3 ...

Page 39: ...cular piece Fig 4 Release CN DISP Fig 4 Release CN STM Fig 4 Release CN TH Fig 4 Release CN SONIC Fig 4 Release CN FB Fig 4 Release CN DATA Fig 4 Release CN FM Fig 4 Remove RY PWR connector black and brown and AC WHT connector from power PCB Pull the hooks and remove the PCBs Fig 4 ...

Page 40: ...g 5 Fig 5 Remove the earth wire from the evaporator Fig 6 Remove 2 screws on the right and 1 screw at the left side of control board Fig 6 Then pull out the control board from the unit Fig 6 Fig 6 Remove the cross flow fan bushing from the chassis Fig 7 Loosen the fan boss screw at the cross flow fan Fig 7 ...

Page 41: ...41 Pull the hook at the left side of evaporator Fig 7 Then push up the evaporator and remove cross flow fan by pulling both cross flow fan and fan motor Fig 8 Fig 8 ...

Page 42: ...42 15 Technical Data 15 1 Thermostat Characteristics Cooling Soft Dry ...

Page 43: ...43 15 2 Operation Characteristics 15 2 1 CS C12EKF CU C12EKF ...

Page 44: ...44 ...

Page 45: ... 9963 1 1120 32 19 3 7469 3 8100 1 0246 3 6157 3 7130 1 1120 3 4110 3 5028 1 1897 22 4 0617 3 4220 1 1460 3 9253 3 3843 1 2431 3 7154 3 2819 1 3305 Indoor Air Temperature entering Condenser C D B Model Power Ambient 40 C 43 C 52 C Source Temp TC SHC IPT TC SHC IPT TC SHC IPT D B W B KW KW KW KW KW KW KW KW KW 17 2 9702 2 1933 1 2528 2 7918 2 1232 1 3257 2 4759 1 7584 1 5726 23 19 3 2116 1 8807 1 3...

Page 46: ...46 ...

Page 47: ...6 Exploded View and Replacement Parts List 16 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 48: ... 21 TERMINAL BOARD COMPLETE 1 CWA28C2152 22 POWER SUPPLY CORD W OUT PLUG 1 CWA20C2253 23 ELECTRONIC CONTROLLER MAIN 1 CWA73C2029 0 24 ELECTRONIC CONTROLLER POWER 1 CWA744057 0 25 SENSOR COMPLETE 1 CWA50C2122 0 26 CONTROL BOARD FRONT COVER 1 CWH131207 27 INDICATOR COMPLETE 1 CWE39C1149 28 INDICATOR HOLDER 1 CWD932609 29 INDICATOR HOLDER 1 CWD932610 30 CONTROL BOARD TOP COVER 1 CWH13C1120 31 REMOTE ...

Page 49: ...49 16 2 Outdoor Unit 16 2 1 CU C12EKF 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 50: ...ILLARY TUBE ASS Y 1 CWB15K1165 14 STRAINER 1 CWB111011 15 HOLDER COUPLING 1 CWB351023 16 2 WAY VALVE LIQUID 1 CWB021116 0 17 3 WAY VALVE GAS 1 CWB011148 0 18 OVERLOAD PROTECTOR 1 CWA121202J 19 TERMINAL COVER 1 CWH171011 20 NUT TERMINAL COVER 1 CWH7080300J 21 SOUND PROOF BOARD 1 CWH151023 22 CONTROL BOARD 1 CWH102202 23 TERMINAL BOARD ASS Y 1 CWA28K1064J 24 CAPACITOR COMPRESSOR 35μF 370V 1 DS371356...

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