Panasonic RE12SKUA Service Manual

© Panasonic Corporation 2016. Order No: PAPAMY1601005CE MODEPOWERFUL/QUIETTIMERCANCELOFF123FAN SPEEDSET CHECK CLOCK RESETACRCAUTOHEATCOOLDRYFANFANS

10 Model Indoor CS-RE18SKUA CS-RE24SKUA Outdoor CU-RE18SKUA CU-RE24SKUA DRY BULB WET BULB DRY BULB WET BULB Indoor Operation Range (Cooling)

100 17.4.27 F96 (IPM Overheating) Malfunction Decision Conditions  During operating of cooling and heating, when IPM temperature data (212°F) is de

101 17.4.28 F97 (Compress or Overheating) Malfunction Decision Conditions  During operation of cooling and heating, when compressor tank temperatur

102 17.4.29 F98 (Input Over Current Detection) Malfunction Decision Conditions  During operation of cooling and heating, when an input over-current

103 17.4.30 F99 (DC Peak Detection) Malfunction Decision Conditions During startup and operation of cooling and heating, when inverter DC peak data i

104 WARNING18. Disassembly and Assembly Instructions High Voltage is generated in the electrical parts area by the capacitor. Ensure that the capa

105 18.1.1.3 To Remove Power Electronic Controller 8. Pull out the mainelectronic controllerhalfway.the electonic controller. Then pull outmain cont

106 18.1.1.5 To Remove Control Board 12. Remove the 4 screws holding thecontrol board then pull out thecontrol board. Figure 6 18.1.1.6 To Remove

107 118. Fan motor can be removed after theremoval of cross flow fan.17. Remove the cross flow fan from the unit bypulling it to the left and downward

108 WARNING High Voltage is generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before p

109 CN-RMTCN-FMCN-STM1CN-STM2CN-MSENSCN-THCN-DISP Figure 13 Figure 14 18.2.1.3 To Remove Discharge Grille Figure 15

11 3. Features  Inverter Technology o Wider output power range o Energy saving o Quick Cooling o More precise temperature control  Environme

110 18.2.1.4 To Remove Control Board Figure 16 18.2.1.5 To Remove Cross Flow Fan and Indoor Fan Motor Figure 17 Figure 18

111 Figure 19 Figure 20

112 18.3 Outdoor Electronic Controller Removal Procedure 18.3.1 CU-RE9SKUA CU-RE12SKUA Caution! When handling electronic controller, be careful of

113 18.3.2 CU-RE18SKUA CU-RE24SKUA Caution! When handling electronic controller, be careful of electrostatic discharge. 1 Remove the 8 screws of

114 19. Technical Data Technical data provided are based on the air conditioner running under free frequency. 19.1 Cool Mode Performance Data Unit s

115 19.1.3 CS-RE18SKUA CU-RE18SKUA Indoor (°C / °F) Outdoor (°C / °F) DB WB -20 (-4) -10 (14) 0 (32) 5 (41) TC SHC IP TC SHC IP TC SHC

116 19.2 Heat Mode Performance Data Unit setting: Standard piping length, Hi Fan, Heat mode at 86°F Voltage: 230V 19.2.1 CS-RE9SKUA CU-RE9SKUA Indo

117 20. Service Data Service data provided are based on the air conditioner running under rated frequency during forced cooling / forced heating mode

118 20.3 CS-RE18SKUA CU-RE18SKUA Rated frequency (compressor speed is fixed during forced cooling for capacity measurement and diagnosis purpose) Ind

119 20.5 CS-RE9SKUA CU-RE9SKUA Rated frequency (compressor speed is fixed during forced heating for capacity measurement and diagnosis purpose) Indoo

12 4. Location of Controls and Components 4.1 Indoor Unit POWERTIMERPOWERFULQUIETFront Panel Air FiltersAluminium FinAuto OFF/ON button• Use when re

120 20.9 Cool Mode Outdoor Air Temperature Characteristic Condition - Indoor room temperature: 80°F Dry Bulb/67°F Wet Bulb - Unit setting: Standard p

121 20.9.2 CS-RE12SKUA CU-RE12SKUA Outdoor Air Temperature (°F)Outlet Air(°F)-4 3 1017243138455259667380879410110811556.50057.00057.50058.00058.5005

122 20.9.3 CS-RE18SKUA CU-RE18SKUA Outdoor Air Temperature (°F)Outlet Air(°F)-4 3 1017243138455259667380879410110811553.30054.50055.70056.90058.1005

123 20.9.4 CS-RE24SKUA CU-RE24SKUA Outdoor Air Temperature (°F)Outlet Air(°F)-4 3 1017243138455259667380879410110811550.00051.50053.00054.50056.0005

124 20.10 Heat Mode Outdoor Air Temperature Characteristic Condition - Indoor room temperature: 68°F Dry Bulb/-°F Wet Bulb - Unit setting: Standard

125 20.10.2 CS-RE12SKUA CU-RE12SKUA Outdoor Air Temperature (°F)Outlet Air(°F)-4 2 8 14 20 26 32 38 44 50 56 62 68 7576.00078.00080.00082.00084.0008

126 20.10.3 CS-RE18SKUA CU-RE18SKUA Outdoor Air Temperature (°F)Outlet Air(°F)-4 2 8 14 20 26 32 38 44 50 56 62 68 7582.50084.00085.50087.00088.5009

127 20.10.4 CS-RE24SKUA CU-RE24SKUA Outdoor Air Temperature (°F)Outlet Air(°F)-4 2 8 14 20 26 32 38 44 50 56 62 68 7589.00090.50092.00093.50095.0009

128 20.11 Piping Length Correction Factor The characteristic of the unit has to be corrected in accordance with the piping length. 20.11.1 CS-RE9SKUA

129 20.11.2 CS-RE18SKUA CU-RE18SKUA CS-RE24SKUA CU-RE24SKUA 20.11.2.1 Cooling Capacity CoolingCorrection FactorPipe Length (m/ft)0.950.970.991.011.

13 5. Dimensions 5.1 Indoor Unit 5.1.1 CS-RE9SKUA CS-RE12SKUA 7/81-7/85-1/4Remote controlRemote control holder22-3/85/810-3/8Relative position betw

130 21. Exploded View and Replacement Parts List 21.1 Indoor Unit 21.1.1 CS-RE9SKUA CS-RE12SKUA I/I I/IO/ICWH55025JCWH55051J1224153655334546 47 48

131 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CS-RE9SKUA CS-RE12SKUA REMARK 1 CHASSIS COMPLETE 1 CWD50C1633 ← 2 FAN MOTOR 1 L6CB

132 21.1.2 CS-RE18SKUA CS-RE24SKUA CWH55025JCWH55051J28I/I I/IO/I35303129342513166140345837383927441023111224431546 47 48323626334142459721455 Not

133 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CS-RE18SKUA CS-RE24SKUA REMARK 1 CHASSIS COMPLETE 1 CWD50C1637 ← 2 FAN MOTOR 1

134 21.2 Outdoor Unit 21.2.1 CU-RE9SKUA CU-RE12SKUA 242723194205261518891013617221632331421129672130331283739431234424413413850 Note The above expl

135 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-RE9SKUA CU-RE12SKUA REMARK 1 CHASSIS COMPLETE 1 CWD50K2081A ← 2 FAN MOTOR BRAC

136 21.2.2 CU-RE18SKUA CU-RE24SKUA 466741632423124710591145916022744225870531308254849x 2x 22019646214281527431833403863 Note The above exploded vi

137 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-RE18SKUA CU-RE24SKUA REMARK 1 CHASSIS COMPLETE 1 CWD52K1347A ← 2 ANTI - VIBRAT

138 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-RE18SKUA CU-RE24SKUA REMARK 67 STRAINER 1 CWB111076 ← 70 BAG - COMPLETE (L-TUB

14 5.1.2 CS-RE18SKUA CS-RE24SKUA 7/8Remote controlRemote control holder22-3/85/810-3/8Relative position between the indoor unit and the installatio

15 5.2 Outdoor Unit 5.2.1 CU-RE9SKUA CU-RE12SKUA <Side View><Side View> <Front View><Top View>Unit : inch30-23/3212-5/81/22

16 6. Refrigeration Cycle Diagram 6.1 CU-RE9SKUA CU-RE12SKUA INDOOR OUTDOORINTAKETEMP.SENSORPIPETEMP.SENSORINTAKETEMP.SENSORPIPETEMP.SENSORLIQUIDSI

17 6.2 CU-RE18SKUA CU-RE24SKUA INDOOR OUTDOORINTAKETEMP.SENSORPIPETEMP.SENSOR 1PIPETEMP.SENSOR 2INTAKETEMP.SENSORPIPETEMP.SENSORLIQUIDSIDE2-WAYVALV

18 7. Block Diagram 7.1 CS-RE9SKUA CU-RE9SKUA CS-RE12SKUA CU-RE12SKUA FUSE 301RY-ACPTC1CT1024-WAYSVALVEPTCNTCTH3REACTORIC19RY-PWRFUSE101(INDOOR UNI

19 7.2 CS-RE18SKUA CU-RE18SKUA CS-RE24SKUA CU-RE24SKUA (INDOOR UNIT) (OUTDOOR UNIT)M S3 ~FUSE 301FUSE3UTEMP.FUSESINGLE PHASEPOWER SUPPLY1ø208/230V,

2 TABLE OF CONTENTS 1. Safety Precautions ... 32. Specification ...

20 8. Wiring Connection Diagram 8.1 Indoor Unit 8.1.1 CS-RE9SKUA CS-RE12SKUA REMARKSB : BLUE P : PINKBR : BROWN O : ORANGEBL : BLACK Y : YE

21 8.1.2 CS-RE18SKUA CS-RE24SKUA REMARKSB : BLUE P : PINKBR : BROWN O : ORANGEBL : BLACK Y : YELLOWW : WHITE G : GREENR : RED Y/G : YEL

22 8.2 Outdoor Unit 8.2.1 CU-RE9SKUA CU-RE12SKUA TERMINALBOARDTO INDOOR UNITCOMPRESSOROUTDOOR AIR TEMP.SENSOR(THERMISTOR)PIPING TEMP. SENSOR(THERMI

23 8.2.2 CU-RE18SKUA CU-RE24SKUA TO INDOOR UNITYLW/GRNBLKBLKWHTWHT2(WHT)1(BLK)(WHT)(BLK)SINGLE PHASEPOWER SUPPLYL2L1GROUNDING TERMINALRED (RED)(TRA

24 9. Electronic Circuit Diagram 9.1 Indoor Unit 9.1.1 CS-RE9SKUA CS-RE12SKUA MGROUNDINGTERMINAL1W23BLEVAPORATORAC303(WHT)AC306(BLK)AC304(RED)G301(

25 9.1.2 CS-RE18SKUA CS-RE24SKUA MGROUNDINGTERMINAL1W23BLEVAPORATORAC303(WHT)AC306(BLK)AC304(RED)G301(GRN)FUSE301T3.15A L250VTEMP.FUSE102°C(3A)TOOU

26 9.2 Outdoor Unit 9.2.1 CU-RE9SKUA CU-RE12SKUA Sensor (Thermistor)Characteristics706050403020100-10 0 10Temperature (oC)Resistance (kΩ)20 30 40 5

27 9.2.2 CU-RE18SKUA CU-RE24SKUA TO INDOOR UNITYLW/GRNBLKBLKWHTWHT2(WHT)1(BLK)(WHT)(BLK)SINGLE PHASEPOWER SUPPLYL2L1GROUNDING TERMINALYLW/GRNCONTRO

28 10. Printed Circuit Board 10.1 Indoor Unit 10.1.1 Main Printed Circuit Board CN-RMTCN-FMCN-STM2(RE18/24SKUA only)CN-STM1CN-MSENSCN-THJP1 (Random

29 10.2 Outdoor Unit 10.2.1 Main Printed Circuit Board 10.2.1.1 CU-RE9SKUA CU-RE12SKUA CN-HOTCN-STMCN-THCN-MTR1CN-MTR2CN-TANKAC-BLKDATAAC-WHTPOWERT

3 CAUTION WARNINGWARNING 1. Safety Precautions  Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing.  Electrical work m

30 10.2.1.2 CU-RE18SKUA CU-RE24SKUA CN-TANKCN-EVCN-DCFMCN-HOTCOM3AC-BLKAC-WHTCN-TH1POWERTRANSISTOR(IPM)CURRENTTRANSFORMER(CT)

31 11. Installation Instruction (RE9SKUA and RE12SKUA) 11.1 Select the Best Location 11.1.1 Indoor Unit  Do not install the unit in excessive oil

32 11.2 Indoor Unit 11.2.1 How to Fix Installation Plate The mounting wall shall be strong and solid enough to prevent it from the vibration. 345621

33 11.2.3 Indoor Unit Installation PUSH PUSHPipingIntake grillepulloutthepipingDo not turn over the unit without it’s shock absorber during pull out

34 Rear view for left piping installationDrain capDrain hoseAdjust the pipingslightly downwards.Drain hoseConnectioncable•How to pull the piping and d

35 11.2.4 Connect the Cable to the Indoor Unit 1. The inside and outside connection cable can be connected without removing the front grille. 2. Un

36 11.2.4.2 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 a

37 11.3 Outdoor Unit 11.3.1 Install the Outdoor Unit  After selecting the best location, start installation according to Indoor/Outdoor Unit Instal

38 11.3.3 Evacuation of the Equipment WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the followi

39 11.3.3.1 Connect the Cable to the Outdoor Unit 1. Remove Top panel. 2. Remove Control Board Cover (Resin and Metal). 3. Remove Plugs. 4. Fix t

4 CAUTIONWARNING 19. During installation, install the refrigerant piping properly before run the compressor. (Operation of compressor without fixing r

40 12. Installation Instruction (RE18SKUA and RE24SKUA) 12.1 Select the Best Location 12.1.1 Indoor Unit  Do not install the unit in excessive oi

41 12.2 Indoor Unit 12.2.1 How to Fix Installation Plate The mounting wall shall be strong and solid enough to prevent it from the vibration. 3456Wa

42 12.2.3 Indoor Unit Installation PUSH PUSHPipingIntake grillepulloutthepipingDo not turn over the unit without it’s shock absorber during pull out

43 Rear view for left piping installationDrain capDrain hoseAdjust the pipingslightly downwards.Drain hoseConnectioncable•How to pull the piping and d

44 12.2.4 Connect the Cable to the Indoor Unit 1. The inside and outside connection cable can be connected without removing the front grille. 2. U

45 12.2.4.2 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 a

46 12.3 Outdoor Unit 12.3.1 Install the Outdoor Unit  After selecting the best location, start installation to Indoor/Outdoor Unit Installation Dia

47 12.3.3 Evacuation of the Equipment WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the followi

48 12.3.3.1 Connect the Cable to the Outdoor Unit 1. Remove control board cover (Resin and Metal). 2. Remove particular plate. 3. Remove plugs. 4.

49 12.3.3.2 Piping Insulation 1. Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Ple

5 2. Specification Model Indoor CS-RE9SKUA CS-RE12SKUA Outdoor CU-RE9SKUA CU-RE12SKUA Performance Test Condition ARI ARI Power Supply Phase, Hz

50 13. Operation Control 13.1 Basic Function Inverter control, which equipped with a microcomputer in determining the most suitable operation mode as

51 13.1.4.2 Automatic Operation  This mode can be set using remote control and the operation is decided by remote control setting temperature, remot

52 13.3 Indoor Fan Motor Operation 13.3.1 Basic Rotation Speed (rpm)  Manual Fan Speed [Cooling, Dry] o Fan motor’s number of rotation is determi

53 13.5 Airflow Direction  There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by vert

54 13.5.3 Horizontal Airflow (CU-RE18SKUA CU-RE24SKUA)  Automatic horizontal airflow direction can be set using remote control; the vane swings le

55 13.7 Quiet Operation (Heating)  Purpose o To provide quiet heating operation compare to normal operation.  Control condition o Quiet operat

56 13.10 Auto Restart Control  When the power supply is cut off during the operation of air conditioner, the compressor will re-operate within three

57 14. Protection Control (RE9SK and RE12SK) 14.1 Protection Control For All Operations 14.1.1 Restart Control (Time Delay Safety Control)  The c

58 14.1.5 Compressor Overheating Prevention Control  Instructed frequency for compressor operation will be regulated by compressor discharge temper

59 14.2 Protection Control For Cooling & Soft Dry Operation 14.2.1 Outdoor Air Temperature Control  The maximum current value is regulated whe

6 Model Indoor CS-RE9SKUA CS-RE12SKUA Outdoor CU-RE9SKUA CU-RE12SKUA Outdoor Fan Type Propeller Propeller Material PP PP Motor Type DC

60 14.2.5 Dew Prevention Control 1  To prevent dew formation at indoor unit discharge area.  This control will be activated if: o Outdoor air te

61 14.2.6.3 Overload Protection Control  The compressor operating frequency is regulated in accordance to indoor heat exchanger temperature as shown

62 15. Protection Control (RE18SK and RE24SK) 15.1 Protection Control For All Operations 15.1.1 Restart Control (Time Delay Safety Control)  The

63 15.1.5 Compressor Overheating Prevention Control  Instructed frequency for compressor operation will be regulated by compressor discharge temper

64  The compressor will be stopped at outdoor air temperature ≤ -4°F. The unit still operate within the temperature range. -0.4°F-4°FCompressor OFF

65 15.2.6 Protection Control For Heating Operation 15.2.6.1 Intake Air Temperature Control Compressor will operate at limited freq., if indoor intak

66 16. Servicing Mode 16.1 Auto Off/On Button Auto OFF/ON Button pressed Auto OFF/ON Button pressed Auto OFF/ON Button pressed 5 sec 5 sec A

67 4 REMOTE CONTROL RECEIVING SOUND OFF/ON MODE The Remote Control Receiving Sound OFF/ON Mode will be activated if the Auto OFF/ON button is pressed

68 16.3 Remote Control Button 16.3.1 SET Button  To check remote control transmission code and store the transmission code to EEPROM o Press “Set”

69 17. Troubleshooting Guide 17.1 Refrigeration Cycle System In order to diagnose malfunctions, make sure that there are no electrical problems befo

7 Model Indoor CS-RE9SKUA CS-RE12SKUA Outdoor CU-RE9SKUA CU-RE12SKUA DRY BULB WET BULB DRY BULB WET BULB Indoor Operation Range (Cooling) (°F

70 17.1.1 Relationship between the condition of the air conditioner and pressure and electric current edoMgnitaeHedoMgnilooCLow Pressure High Pressu

71 17.2 Breakdown Self Diagnosis Function 17.2.1 Self Diagnosis Function (Three Digits Alphanumeric Code)  Once error occurred during operation, t

72 17.3 Error Code Table Abnormality /Protection controlAbnormalityJudgementProtectionoperationProblem Check locationDiagnosisdisplay——noitarepolamr

73 F91 Refrigeration cycleabnormality2 times happenwithin 20 minutes— Refrigeration cycle abnormal • Insufficient refrigerant or valvecloseF93 Compres

74 17.4 Self-diagnosis Method 17.4.1 H11 (Indoor/Outdoor Abnormal Communication) Malfunction Decision Conditions  During startup and operation of c

75 17.4.2 H12 (Indoor/Outdoor Capacity Rank Mismatched) Malfunction Decision Conditions  During startup, error code appears when different types of

76 17.4.3 H14 (Indoor Intake Air Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heati

77 17.4.4 H15 (Compressor Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the

78 17.4.5 H16 (Outdoor Current Transformer) Malfunction Decision Conditions  An input current, detected by Current Transformer CT, is below thresho

79 17.4.6 H19 (Indoor Fan Motor – DC Motor Mechanism Locked) Malfunction Decision Conditions  The rotation speed detected by the Hall IC during fan

8 Model Indoor CS-RE18SKUA CS-RE24SKUA Outdoor CU-RE18SKUA CU-RE24SKUA Performance Test Condition ARI ARI Power Supply Phase, Hz Single, 60 Si

80 17.4.7 H23 (Indoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, th

81 17.4.8 H27 (Outdoor Air Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, th

82 17.4.9 H28 (Outdoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, t

83 17.4.10 H30 (Compressor Discharge Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and h

84 17.4.11 H32 (Outdoor Heat Exchanger Temperature Sensor 2 Abnormality) Malfunction Decision Conditions  During startup and operation of cooling a

85 17.4.12 H33 (Unspecified Voltage between Indoor and Outdoor) Malfunction Decision Conditions  The supply power is detected for its requirement b

86 17.4.13 H36 (Outdoor Gas Pipe Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temp

87 17.4.14 H37 (Outdoor Liquid Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and he

88 17.4.15 H59 (Human Activity Sensor Abnormality) Malfunction Decision Conditions  Feedback signal of human activity sensor. Malfunction Caused 

89 17.4.16 H70 (Light Sensor Abnormality) Malfunction Decision Conditions  Feedback signal of light sensor. Malfunction Caused  Feedback value i

9 Model Indoor CS-RE18SKUA CS-RE24SKUA Outdoor CU-RE18SKUA CU-RE24SKUA Outdoor Fan Type Propeller Propeller Material PP PP Motor Type D

90 17.4.17 H97 (Outdoor Fan Motor – DC Motor Mechanism Locked) RE9SKUA/RE12SKUA Malfunction Decision Conditions  The rotation speed detected by the

91 17.4.18 H97 (Outdoor Fan Motor – DC Motor Mechanism Locked) RE18SKUA/CU-RE24SKUA Malfunction Decision Conditions  The rotation speed detected by

92 17.4.19 H98 (Error Code Stored in Memory and no alarm is triggered / no TIMER LED flashing) Malfunction Decision Conditions  Indoor high pressur

93 17.4.20 H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry) Error Code will not display (no Timer LED blinking) but store in EEPROM Ma

94 17.4.21 F11 (4-way Valve Switching Failure) Malfunction Decision Conditions  When indoor heat exchanger is cold during heating (except deice) or

95 17.4.22 F17 (Indoor Standby Units Freezing Abnormality) Malfunction Decision Conditions  When the different between indoor intake air temperatur

96 17.4.23 F90 (Power Factor Correction Protection) Malfunction Decision Conditions  To maintain DC voltage level supply to power transistor.  To

97 17.4.24 F91 (Refrigeration Cycle Abnormality) Malfunction Decision Conditions  The input current is low while the compressor is running at highe

98 17.4.25 F93 (Compressor Rotation Failure) Malfunction Decision Conditions  A compressor rotation failure is detected by checking the compressor

99 17.4.26 F95 (Outdoor High Pressure Protection: Cooling or Soft Dry) Malfunction Decision Conditions  During operation of cooling or soft dry, wh