Panasonic CS-RE18QKE Service Manual
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Panasonic CS-RE18QKE Service Manual

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This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
WARNING
PRECAUTION OF LOW TEMPERATURE
Indoor Unit
CS-RE18QKE
CS-RE24QKE
Order No: PAPAMY1312011CE
Outdoor Unit
CU-RE18QKE
CU-RE24QKE
Destination
Europe
E.Europe
L.America
Turkey
© Panasonic Corporation 2013.

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Summary of Contents for Panasonic CS-RE18QKE

  • Page 1 PRECAUTION OF LOW TEMPERATURE In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit. © Panasonic Corporation 2013.

  • Page 2: Table Of Contents

    18.2 Heat Mode Outdoor Air Temperature 7. Block Diagram ..........15 Characteristic..........91 18.3 Piping Length Correction Factor....93 CS-RE18QKE CU-RE18QKE.....15 CS-RE24QKE CU-RE24QKE.....16 19. Exploded View and Replacement Parts List. 94 8. Wiring Connection Diagram ......17 19.1 Indoor Unit ..........94 19.2...

  • Page 3: Safety Precautions

    1. Safety Precautions  Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing.  Electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model installed. ...
  • Page 4 WARNING During pump down operation, stop the compressor before remove the refrigeration piping. (Removal of compressor while compressor is operating and valves are opened will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.) After completion of installation or service, confirm there is no leakage or refrigerant gas.

  • Page 5: Specifications

    2. Specifications Indoor CS-RE18QKE CS-RE24QKE Model Outdoor CU-RE18QKE CU-RE24QKE Performance Test Condition EUROVENT EUROVENT Phase, Hz Single, 50 Single, 50 Power Supply Min. Mid. Max. Min. Mid. Max. 0.98 5.00 6.00 0.98 6.80 8.10 Capacity BTU/h 3340 17100 20500 3340...
  • Page 6 Indoor CS-RE18QKE CS-RE24QKE Model Outdoor CU-RE18QKE CU-RE24QKE Type Hermetic Motor (Rotary) Hermetic Motor (Rotary) Compressor Motor Type Brushless (4-poles) Brushless (4-poles) Output Power 1.7k Type Cross-Flow Fan Cross-Flow Fan Material ASG20K1 ASG20K1 Motor Type DC / Transistor (8 poles) DC / Transistor (8 poles) Input Power 94.8...
  • Page 7 Indoor CS-RE18QKE CS-RE24QKE Model Outdoor CU-RE18QKE CU-RE24QKE Fin Material Aluminium (Pre Coat) Aluminium (Pre Coat) Fin Type Slit Fin Slit Fin Indoor Heat Exchanger Row × Stage × FPI 2 × 15 × 17 2 × 15 × 21 Size (W × H × L) 810 ×...

  • Page 8: Features

    3. Features  Inverter Technology Wider output range Energy saving More precise temperature control  Environment Protection Non-ozone depletion substances refrigerant (R410A)  Long Installation Piping CS/CU-RE18QKE, long piping up to 20 meter CS/CU-RE24QKE, long piping up to 30 meter ...

  • Page 9: Location Of Controls And Components

    4. Location of Controls and Components Indoor Unit Outdoor Unit Remote Control...

  • Page 10: Dimensions

    5. Dimensions Indoor Unit & Remote Control...

  • Page 11: Outdoor Unit

    Outdoor Unit 5.2.1 CU-RE18QKE...
  • Page 12 5.2.2 CU-RE24QKE...

  • Page 13: Refrigeration Cycle Diagram

    6. Refrigeration Cycle Diagram 6.1.1 CS-RE18QKE CU-RE18QKE INDOOR OUTDOOR LIQUID EXPANSION SIDE RECEIVER VALVE PIPE TEMP. 2-WAY SENSOR VALVE PIPE TEMP. SENSOR [EVA INLET] INTAKE TEMP. TEMP. SENSOR SENSOR PIPE TEMP. SENSOR HEAT EXCHANGER HEAT EXCHANGER (EVAPORATOR) (CONDENSER) SIDE STRAINER...
  • Page 14 6.1.2 CS-RE24QKE CU-RE24QKE INDOOR OUTDOOR LIQUID EXPANSION SIDE RECEIVER STRAINER STRAINER VALVE PIPE TEMP. 2-WAY SENSOR VALVE PIPE TEMP. SENSOR [EVA INLET] INTAKE TEMP. TEMP. SENSOR SENSOR PIPE TEMP. SENSOR HEAT EXCHANGER HEAT EXCHANGER (EVAPORATOR) (CONDENSER) SIDE 4-WAY VALVE 3-WAY VALVE DISCHARGE MUFFLER...

  • Page 15: Block Diagram

    7. Block Diagram CS-RE18QKE CU-RE18QKE...

  • Page 16: Cs-Re24Qke Cu-Re24Qke

    CS-RE24QKE CU-RE24QKE...

  • Page 17: Wiring Connection Diagram

    8. Wiring Connection Diagram Indoor Unit GROUNDING TERMINAL ELECTRONIC CONTROLLER CN-RMT (MAIN) (WHT) TERMINAL BOARD RY-PWR RY-PWR2 FUSE301 UP DOWN CN-STM1 LOUVER MOTOR (WHT) T3.15A L250V AC304 (RED) AC303 TEMP. (WHT) FUSE NOISE 102°C (3A) G301 FILTER TEMP. (GRN) OUTDOOR CIRCUIT FUSE UNIT...

  • Page 18: Outdoor Unit

    Outdoor Unit 8.2.1 CU-RE18QKE TO INDOOR UNIT YELLOW TERMINAL REACTOR (BLK) (WHT) (RED) BOARD BLUE TRADE MARK COMP. TERMINAL L2-I L2-O (GRAY) (GRAY) REMARKS COM3 (RED) BLU: BLUE COMMUNICATION ELECTRONIC CONTROLLER BLK: BLACK CIRCUIT WHT: WHITE RED: RED AC-BLK FUSE2 (BLACK) YLW: YELLOW (T3.15A L250V)
  • Page 19 8.2.2 CU-RE24QKE REACTOR REACTOR ACL1 L1-I L2-I L1-O L2-O CN-BLK AC-BLK (GREEN) (BLACK) (GRAY) (GRAY) (BLACK) (BLACK) (BLACK) (BLACK) (RED) NOISE FILTER FUSE3 CN-WHT AC-WHT (BLU) (25A 250V) CIRCUIT (WHITE) (WHITE) TERMINAL (YELLOW) BOARD ACN1 (WHITE) FUSE2 CN-FM COMPRESSOR T3.15A (WHITE) L250V COMMUNICATION...

  • Page 20: Electronic Circuit Diagram

    9. Electronic Circuit Diagram Indoor Unit...

  • Page 21: Outdoor Unit

    Outdoor Unit 9.2.1 CU-RE18QKE TO INDOOR UNIT REACTOR TERMINAL (BLK) (WHT) (RED) BOARD L2-I L2-O (GRAY) (GRAY) COMP. TEMP. SENSOR R410 1µ 4.99k (THERMISTOR) COM3 (RED) (50kΩ 3950) COMMUNICATION OUTDOOR AIR TEMP. CIRCUIT SENSOR (THERMISTOR) R101 R100 15.8k 15.0k (15kΩ 3950) AC-BLK (BLACK) FUSE3...
  • Page 22 9.2.2 CU-RE24QKE REACTOR REACTOR ACL1 L1-I L2-I L1-O L2-O CN-BLK AC-BLK (BLACK) (GREEN) (GRAY) (GRAY) (BLACK) (BLACK) (BLACK) (BLACK) TERMINAL NOISE FILTER FUSE3 CN-WHT AC-WHT BOARD (RED) (WHITE) (WHITE) (25A 250V) CIRCUIT (BLU) ACN1 (YELLOW) (WHITE) COMMUNICATION FUSE2 COMPRESSOR COM3 CIRCUIT T3.15A CN-FM...

  • Page 23: Printed Circuit Board

    10. Printed Circuit Board 10.1 Indoor Unit 10.1.1 Main Printed Circuit Board AC304 AC303 G301 RY-PWR2 RY-PWR CN-FM CN-RMT CN-STM2 CN-STM1 CN-DISP CN-TH JP1 (Random Auto Restart enable/disable) 10.1.2 Indicator Printed Circuit Board CN-DISP...

  • Page 24: Outdoor Unit

    10.2 Outdoor Unit 10.2.1 Main Printed Circuit Board 10.2.1.1 CU-RE18QKE L1-0 L2-0 POWER TRANSISTOR (IPM) L2-1 CURRENT TRANSFORMER (CT) CN-HOT CN-DCFM COM3 CN-TANK CN-EV CN-TH1 AC-BLK AC-WHT...
  • Page 25 10.2.1.2 CU-RE24QKE L1-0 L2-0 POWER TRANSISTOR (IPM) CURRENT TRANSFORMER (CT) AC-WHT AC-BLK CN-HOT CN-FM CN-COM CN-TANK CN-TH1 CN-EV...
  • Page 26 10.2.2 Noise Filter Printed Circuit Board 10.2.2.1 CU-RE24QKE CN-COM COM3 CN-BLK ACL1 ACN1 CN-WHT...

  • Page 27: Installation Instruction

    11. Installation Instruction 11.1 Select the Best Location 11.1.1 Indoor Unit 11.1.3 Indoor/Outdoor Unit Installation  Diagram Do not install the unit in excessive oil fume area such as kitchen, workshop and etc.  There should not be any heat source or steam Piping direction Attention not to bend near the unit.

  • Page 28: Indoor Unit

    11.2 Indoor Unit 11.2.1 How to Fix Installation Plate The mounting wall shall be strong and solid enough to prevent if from the vibration. Wall Wall Wall More than More than 1 More screw than 128 mm DISTANCE TO PIPE HOLE CENTER 128 mm 241.5 mm Installation plate...
  • Page 29 11.2.3 Indoor Unit Installation ● Do not turn over the unit without it’s shock absorber during pull out the piping. It may cause intake grille damage. ● Use shock absorber during pull out the piping to protect the intake grille from damage. Piping Piping Shock absorber...
  • Page 30 Replace the drain hose Rear view for left piping installation Connection Drain hose cable Piping More than Connection cable 1150 mm Drain hose Drain hose Drain cap Sleeve for piping hole Adjust the piping slightly downwards. • • How to pull the piping and drain hose out, in case In case of left piping how to insert of the embedded piping the connection cable and drain...
  • Page 31 Remove the tapes and connect the power supply cord and connection cable between indoor unit and outdoor unit according to the diagram below. Terminals on the outdoor unit Colour of wires (connection cable) WARNING Terminals on the indoor unit (Power supply cord) This equipment must be properly earthed.
  • Page 32 Wire stripping Conductor not Conductor Conductor WIRE STRIPPING, fully inserted fully inserted over inserted Indoor/outdoor CONNECTING connection terminal board REQUIREMENT 5 mm No loose strand or more when inserted ACCEPT PROHIBITED PROHIBITED (gap between wires) RISK OF FIRE JOINING OF WIRES MAY CAUSE WARNING OVERHEATING...

  • Page 33: Outdoor Unit

    11.3 Outdoor Unit 11.3.1 Install the Outdoor Unit  After selecting the best location, start installation according to Indoor/Outdoor Unit Installation Diagram. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm). When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or nails.
  • Page 34 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 following procedure. Liquid side Indoor unit Two-way valve Outdoor unit Close Gas side Three-way valve OPEN Close Vacuum CLOSE...
  • Page 35 11.3.4 Connect the Cable to the Outdoor Unit Remove the control board cover from the unit by loosening the screw. Terminal Connection cable between indoor unit and Board outdoor unit shall be approved polychloroprene sheathed 4 1.5 mm (1.0 ~ ×...

  • Page 36: Operation And Control

    12. Operation and Control 12.1 Basic Function Inverter control, which equipped with a microcomputer in determining the most suitable operation mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operation mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature shifting.
  • Page 37 12.1.5 Automatic Operation  This mode can be set using remote control and the operation is decided by remote control setting temperature, remote control operation mode and indoor intake air temperature.  During operation mode judgment, indoor fan motor (with speed of Lo-) is running for 30 seconds to detect the indoor intake air temperature.

  • Page 38: Airflow Direction

    [Heating]  According to indoor pipe temperature, automatic heating fan speed is determined as follows. B. Feedback control  Immediately after the fan motor started, feedback control is performed once every second.  During fan motor on, if fan motor feedback ≥ 2550 rpm or < 50 rpm continue for 10 seconds, then fan motor error counter increase, fan motor is then stop and restart.
  • Page 39 Manual vertical airflow direction can be set using remote control; the angles of the vane are as stated above and the positions of the vane are as Figure 2 below. When the air conditioner is stopped using remote control, the vane will shift to close position. 12.2.2 Horizontal Airflow Automatic horizontal airflow direction can be set using remote control;...

  • Page 40: On Timer Control

    12.3 ON Timer Control ON timer can be set using remote control, 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. 60 minutes before the set time, indoor (at fan speed of Lo-) and outdoor fan motor start operate for 30 seconds to determine the indoor intake air temperature and outdoor air temperature in order to judge the operation starting time.

  • Page 41: Protection Control

    13. Protection Control 13.1 Protection Control For All Operations 13.1.1 Time Delay Safety Control The compressor will not start for three minutes after stop of operation. This control is not applicable if the power supply is cut off and on again or after 4-way valve deices condition. 13.1.2 Total Running Current Control When the outdoor unit total running current (AC) exceeds X value, the frequency instructed for compressor operation will be decreased.
  • Page 42 13.1.4 Compressor Overheating Prevention Control Instructed frequency for compressor operation will be regulated by compressor top temperature. The changes of frequency are as below figure. If compressor discharge temperature exceeds 107°C (RE18QK) and 112°C (RE24QK), compressor will be stop, occurs 4 times per 20 minutes, timer LED will be blinking (“F97” is to be confirmed). 13.1.5 Low Pressure Prevention Control (Gas Leakage Detection) ...

  • Page 43: Protection Control For Cooling & Soft Dry Operation

    13.2 Protection Control For Cooling & Soft Dry Operation 13.2.1 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.

  • Page 44: Protection Control For Heating Operation

    13.2.6 Odor Cut Control  To reduce the odor released from the unit. Start Condition  AUTO FAN Speed is selected during COOL or DRY operation.  During freeze prevention control and timer preliminary operation, this control is not applicable. Control content ...

  • Page 45: Servicing Mode

    14. Servicing Mode 14.1 Auto OFF/ON Button AUTO OPERATION MODE The Auto Operation will be activated immediately once the Auto OFF/ON button is pressed. This operation can be used to operate air conditioner with limited function if remote control is misplaced or malfunction. TEST RUN OPERATION (FOR PUMP DOWN/SERVICING PURPOSE) The Test Run operation will be activated if the Auto OFF/ON button is pressed continuously for more than 5 seconds.

  • Page 46: Remote Control Button

    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 continuously for more than 16 seconds (4 “beep” sounds will occur at 16th seconds to identify the Remote Control Receiving Sound Off/On Mode is in standby condition) and press “AC Reset”...

  • Page 47: Troubleshooting Guide

    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 on the right.

  • Page 48: Relationship Between The Condition Of The Air Conditioner And Pressure And Electric Current

    15.2 Relationship Between The Condition Of The Air Conditioner And Pressure And Electric Current Cooling Mode Heating Mode Condition of the Electric current Electric current air conditioner Low Pressure High Pressure Low Pressure High Pressure during operation during operation Insufficient refrigerant ...

  • Page 49: Breakdown Self Diagnosis Function

    15.3 Breakdown Self Diagnosis Function 15.3.1 Self Diagnosis Function (Three Digits Alphanumeric Code)  When the latest abnormality code on the main Once abnormality has occurred during operation, unit and code transmitted from the remote the unit will stop its operation, and Timer LEDs controller are matched, power LED will light blink.

  • Page 50: Error Codes Table

    15.4 Error Codes Table Diagnosis Abnormality / Abnormality Protection Problem Check location display Protection control Judgment Operation No memory of failure — Normal operation — — Indoor fan only  Indoor/outdoor wire terminal Indoor/outdoor operation can Indoor/outdoor After operation for abnormal communication not ...
  • Page 51 Diagnosis Abnormality / Abnormality Protection Problem Check location display Protection control Judgment Operation  Check indoor/outdoor Wrong wiring and connection wire and connection Abnormal wiring or — — connecting pipe, expansion pipe piping connection valve abnormality  Expansion valve and lead wire and connector ...

  • Page 52: Self-Diagnosis Method

    15.5 Self-diagnosis Method 15.5.1 H11 (Indoor/Outdoor Abnormal Communication) Malfunction Decision Conditions  During startup and operation of cooling and heating, the data received from outdoor unit in indoor unit signal transmission is checked whether it is normal. Malfunction Caused  Faulty indoor unit PCB.
  • Page 53 15.5.2 H12 (Indoor/Outdoor Capacity Rank Mismatched) Malfunction Decision Conditions  During startup, error code appears when different types of indoor and outdoor units are interconnected. Malfunction Caused  Wrong models interconnected.  Wrong indoor unit or outdoor unit PCBs mounted. ...
  • Page 54 15.5.3 H14 (Indoor Intake Air Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the indoor intake air temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 55 15.5.4 H15 (Compressor Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor compressor temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection.  Faulty sensor.
  • Page 56 15.5.5 H16 (Outdoor Current Transformer) Malfunction Decision Conditions  An input current, detected by Current Transformer CT, is below threshold value when the compressor is operating at certain frequency value for 3 minutes. Malfunction Caused  Lack of gas  Broken CT (current transformer) ...
  • Page 57 15.5.6 H19 (Indoor Fan Motor – DC Motor Mechanism Locked) Malfunction Decision Conditions  The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor (feedback of rotation > 2550rpm or < 50rpm). Malfunction Caused ...
  • Page 58 15.5.7 H23 (Indoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 59 15.5.8 H27 (Outdoor Air Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor air temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 60 15.5.9 H28 (Outdoor Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 61 15.5.10 H30 (Compressor Discharge Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 62 15.5.11 H32 (Outdoor Heat Exchanger Temperature Sensor 2 Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor heat exchanger temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection.
  • Page 63 15.5.12 H33 (Unspecified Voltage between Indoor and Outdoor) Malfunction Decision Conditions  The supply power is detected for its requirement by the indoor/outdoor transmission. Malfunction Caused  Wrong models interconnected.  Wrong indoor unit and outdoor unit PCBs used.  Indoor unit or outdoor unit PCB defective.
  • Page 64 15.5.13 H34 (Outdoor Heat Sink Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor heat sink temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 65 15.5.14 H36 (Outdoor Gas Pipe Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor gas pipe temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 66 15.5.15 H37 (Outdoor Liquid Pipe Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor liquid pipe temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 67 15.5.16 H97 (Outdoor Fan Motor – DC Motor Mechanism Locked) Malfunction Decision Conditions  The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor. Malfunction Caused  Operation stops due to short circuit inside the fan motor winding. ...
  • Page 68 15.5.17 H98 (Error Code Stored in Memory and no alarm is triggered / no TIMER LED flashing) Malfunction Decision Conditions  Indoor high pressure is detected when indoor heat exchanger is detecting very high temperature when the unit is operating in heating operation. ...
  • Page 69 15.5.18 H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry) Error code will not display (no TIMER LED blinking) but store in EEPROM Malfunction Decision Conditions  Freeze prevention control takes place (when indoor pipe temperature is lower than 2°C). Malfunction Caused ...
  • Page 70 15.5.19 F11 (4-way valve Abnormality) Malfunction Decision Conditions  When indoor heat exchanger is cold during heating (except deice) or when indoor heat exchanger is hot during cooling and compressor operating, the 4-way valve is detected as malfunction. Malfunction Caused ...
  • Page 71 15.5.20 F17 (Indoor Standby Units Freezing Abnormality) Malfunction Decision Conditions  When the different between indoor intake air temperature and indoor pipe temperature is above 10°C or indoor pipe temperature is below -1.0°C. Remark: When the indoor standby unit is freezing, the outdoor unit transfers F17 error code to the corresponding indoor unit and H39 to other indoor unit(s).
  • Page 72 15.5.21 F90 (Power Factor Correction Protection) Malfunction Decision Conditions  To maintain DC voltage level supply to power transistor.  To detect high DC voltage level after rectification. Malfunction Caused  During startup and operation of cooling and heating, when Power Factor Correction (PFC) protection circuitry at the outdoor unit main PCB senses abnormal DC voltage level for power transistors.
  • Page 73 15.5.22 F91 (Refrigeration Cycle Abnormality) Malfunction Decision Conditions  The input current is low while the compressor is running at higher than the setting frequency. Malfunction Caused  Lack of gas.  3-way valve close. Troubleshooting...
  • Page 74 15.5.23 F93 (Compressor Rotation Failure) Malfunction Decision Conditions A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Caused  Compressor terminal disconnect.  Outdoor PCB malfunction. Troubleshooting...
  • Page 75 15.5.24 F95 (Outdoor High Pressure Protection: Cooling or Soft Dry) Malfunction Decision Conditions  During operation of cooling or soft dry, when outdoor unit heat exchanger high temperature data is detected by the outdoor unit heat exchanger thermistor. Malfunction Caused ...
  • Page 76 15.5.25 F96 (IPM Overheating) Malfunction Decision Conditions  During operating of cooling and heating, when IPM temperature data (100°C) is detected by the IPM temperature sensor. Multi Models Only Compressor Overheating: During operation of cooling and heating, when the compressor OL is activated. Heat Sink Overheating: During operation of cooling and heating, when heat sink temperature data (90°C) is detected by the heat sink temperature sensor.
  • Page 77 15.5.26 F97 (Compressor Overheating) Malfunction Decision Conditions During operation of cooling and heating, when compressor tank temperature data (112°C) is detected by the compressor tank temperature sensor. Malfunction Caused  Refrigerant shortage (refrigerant leakage).  2/3 way valve closed.  Detection error due to faulty compressor tank temperature sensor.
  • Page 78 15.5.27 F98 (Input Over Current Detection) Malfunction Decision Conditions During operation of cooling and heating, when an input over-current (X value in Total Running Current Control) is detected by checking the input current value being detected by current transformer (CT) with the compressor running. Malfunction Caused ...
  • Page 79 15.5.28 F99 (DC Peak Detection) Malfunction Decision Conditions During startup and operation of cooling and heating, when inverter DC peak data is received by the outdoor internal DC Peak sensing circuitry. Malfunction Caused  DC current peak due to compressor failure. ...

  • Page 80: Disassembly And Assembly Instructions

    16. Disassembly and Assembly Instructions WARNING High Voltage are generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks. 16.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures 16.1.1 To remove front grille...
  • Page 81 16.1.3 To remove electronic controller Figure 3 Figure 4...
  • Page 82 16.1.4 To remove discharge grille Figure 5 16.1.5 To remove control board Figure 6...
  • Page 83 16.1.6 To remove cross flow fan and indoor fan motor Figure 7 Figure 8 Figure 9...
  • Page 84 Figure 10...

  • Page 85: Outdoor Electronic Controller Removal Procedure

    16.2 Outdoor Electronic Controller Removal Procedure 16.2.1 CU-RE18QKE 1 Remove the 8 screws of the Top Panel. 4 Remove the Control Board. Fig. 1 2 Remove the 8 screws of the Front Panel. Fig. 4 5 Remove the 6 screws of the Electronic Controller. Fig.
  • Page 86 16.2.2 CU-RE24QKE Remove the 8 screws of the Top Panel. Fig. 4 Remove the 6 screws of the Electronic Controller. Fig. 1 Remove the 8 screws of the Front Panel. Fig. 5 Fig. 2 Caution! When handling electronic controller, be careful of Remove the Top Cover of the Electronic electrostatic discharge.

  • Page 87: Technical Data

    17.1 Cool Mode Performance Data Unit setting: Standard piping length, Hi Fan, Cool mode at 16°C Voltage: 230V CS-RE18QKE/CU-RE18QKE Indoor (°C) Outdoor DB (°C) 19.0 5707 4196 1028 5959 4294 938 5528 4143 1106 5716 4200 1019 5620 4200 1013 5229 3971 1273 5000 4040 1470 22.0 6546 3429 898 6270 3275 1014 6053 3254 1155 5853 3163 1071 6062 3341 1016 5686 3142 1287 5242 2398 1489...

  • Page 88: Heat Mode Performance Data

    17.2 Heat Mode Performance Data Unit setting: Standard piping length, Hi Fan, Heat mode at 30°C Voltage: 230V 17.2.1 CS- RE18QKE/CU-RE18QKE Indoor (°C) Outdoor WB (°C) 3497 1973 4717 2505 5431 2452 5368 1628 5908 1735 3600 1901 4980 2410 5800 2350 5800...

  • Page 89: Service Data

    18. Service Data Service data provided are based on the air conditioner running under rated frequency during forced cooling / forced heating mode. 18.1 Cool Mode Outdoor Air Temperature Characteristic Condition Indoor room temperature: 27°C DryBulb/19°C Wet Bulb Unit setting: Standard piping length, forced cooling at 16°C, Hi fan Compressor frequency: Rated for cooling operation Voltage: 230V 18.1.1...
  • Page 90 18.1.2 CS/CU-RE24QKE 14.0 13.5 13.0 12.5 12.0 11.5 11.0 10.5 10.0 Outdoor Air Temperature (°C) 15.00 14.00 13.00 12.00 11.00 10.00 9.00 8.00 7.00 6.00 5.00 4.00 Outdoor Air Temperature (°C) 1.00 0.95 0.90 0.85 0.80 0.75 0.70 0.65 0.60 0.55 0.50 Outdoor Air Temperature (°C)

  • Page 91: Heat Mode Outdoor Air Temperature Characteristic

    18.2 Heat Mode Outdoor Air Temperature Characteristic Condition Indoor room temperature: 20°C DryBulb/ -°C Wet Bulb Unit setting: Standard piping length, forced heating at 30°C, Hi fan Compressor frequency: Rated for Heating operation Voltage: 230V 18.2.1 CS/CU-RE18QKE 55.00 50.00 45.00 40.00 35.00 30.00...
  • Page 92 18.2.2 CS/CU-RE24QKE 55.00 50.00 45.00 40.00 35.00 30.00 25.00 Outdoor Air Temperature (°C) 16.00 15.00 14.00 13.00 12.00 11.00 10.00 9.00 8.00 Outdoor Air Temperature (°C) 3.40 3.20 3.00 2.80 2.60 2.40 2.20 2.00 Outdoor Air Temperature (°C)

  • Page 93: Piping Length Correction Factor

    18.3 Piping Length Correction Factor The characteristic of the unit has to be corrected in accordance with the piping length. 18.3.1 CS/CU-RE18QKE CS/CU-RE24QKE 1.03 1.01 0.99 0.97 0.95 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Pipe Length (m) 1.01 1.00...

  • Page 94: Exploded View And Replacement Parts List

    19. Exploded View and Replacement Parts List 19.1 Indoor Unit CWH55025 J CWH55051 J 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 95 <Model: CS-RE18QKE CS-RE24QKE SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CS-RE18QKE CS-RE24QKE REMARK CHASSIS COMPLETE CWD50C1654 ← FAN MOTOR ARW7627AC ← CROSS-FLOW FAN COMPLETE CWH02C1077 ← BEARING ASSY CWH64K1010 ← SCREW - CROSS-FLOW FAN CWH551146 ← EVAPORATOR CWB30C4396 CWB30C4424...
  • Page 96 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CS-RE18QKE CS-RE24QKE REMARK INSTALLATION INSTRUCTION CWF616275 ← INSTALLATION INSTRUCTION CWF616276 ← INSTALLATION INSTRUCTION CWF616277 ← INSTALLATION INSTRUCTION CWF616278 ← INSTALLATION INSTRUCTION CWF616279 ← INSTALLATION INSTRUCTION CWF616280 ← ANTI-BACTERIAL FILTER CWD00C1280 ← (Note) ...

  • Page 97: Outdoor Unit

    19.2 Outdoor Unit 19.2.1 CU-RE18QKE Note: The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service part.
  • Page 98 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-RE18QKE REMARK CHASSIS COMPLETE CWD52K1261 ANTI - VIBRATION BUSHING CWH50077 COMPRESSOR 5RD132XBA21 NUT - COMPRESSOR MOUNT CWH56000J SOUND PROOF MATERIAL CWG302632 FAN MOTOR BRACKET CWD541153 FAN MOTOR ARW8401AC SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH551106J...
  • Page 99 19.2.2 CU-RE24QKE Note: The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service part.
  • Page 100 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-RE24QKE REMARK CHASSIS COMPLETE CWD52K1190 ANTI - VIBRATION BUSHING CWH50055 PACKING CWB81043 COMPRESSOR 5KD240XAF21 NUT - COMPRESSOR MOUNT CWH561049 FAN MOTOR BRACKET CWD541127 FAN MOTOR EHDS80C60AC SCREW - FAN MOTOR BRACKET CWH551217 SCREW - FAN MOTOR MOUNT CWH551323 PROPELLER FAN ASSY...
  • Page 101 SAFETY REF. NO. PART NAME & DESCRIPTION QTY. CU-RE24QKE REMARK SHOCK ABSORBER (LEFT) CWG712880 C.C.CASE CWG568361 (Note)  All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488).  “O” marked parts are recommended to be kept in stock. [PAPAMY] Printed in Malaysia SB1213-0...

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