Panasonic CU-4E23QBR Service Manual
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Panasonic CU-4E23QBR Service Manual

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Please file and use this manual together with the service manual for Model No. CS-MRE5QKR CS-MRE7QKR CS-MRE9QKR
CS-MRE12QKR CS-MRE18QKR CS-MRE24QKR, Order No. PAPAMY1404048CE
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
Order No: PAPAMY1404064CE
Air Conditioner
Outdoor Unit
CU-4E23QBR
CU-4E27QBR
CU-5E34QBR
Destination
Australia
New Zealand
© Panasonic Corporation 2014

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Summary of Contents for Panasonic CU-4E23QBR

  • 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 2014...

  • Page 2: Table Of Contents

    19. Exploded View and Replacement Parts List ..............144 11.1 Select the Best Location......46 11.2 Install the Outdoor Unit.......47 19.1 CU-4E23QBR .......... 144 11.3 Connect the Piping ........47 19.2 CU-4E27QBR CU-5E34QBR ....147 11.4 Evacuation of the Equipment .....48 11.5 Connect the Cable to the Outdoor Unit ..49...

  • 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 In case of the soldering iron with temperature control, please set it to 700 ± 20°F (370 ± 10°C). Pb free solder will tend to splash when heated too high (about 1100°F / 600°C). 7. CU-4E23QBR Power supply connection to the room air conditioner.

  • Page 5: Specifications

    2. Specifications CU-4E23QBR Item Unit OUTDOOR UNIT Indoor Unit Combination 1.6kW + 1.6kW + 1.6kW + 2.0kW Phase, Hz Single, 50 Power Source Min. Mid. Max. 1.90 6.80 8.80 Capacity BTU/h 6480 23200 30000 Running Current Power Input 0.34 1.68 2.47...
  • Page 6 Item Unit OUTDOOR UNIT Type Plate fin configuration forced draft type Tube Material Copper Heat Exchanger Fin Material Aluminium (Blue Coat) Row / Stage 2 x 36 Air Volume High (Cooling / Heating) m³/min (ft³/min) 42.5 (1500) / 44.1 (1557) Refrigerant Control Device Expansion Valve Refrigerant Oil...

  • Page 7: Cu-4E27Qbr

    CU-4E27QBR Item Unit OUTDOOR UNIT Indoor Unit Combination 2.0kW + 2.0kW + 2.0kW + 2.0kW Phase, Hz Single, 50 Power Source Min. Mid. Max. 3.00 8.00 9.20 Capacity BTU/h 10200 27300 31400 Running Current Power Input 0.53 2.15 2.87 Electrical Cooling Operation Data 5.66...
  • Page 8 Item Unit OUTDOOR UNIT Type Plate fin configuration forced draft type Tube Material Copper Heat Exchanger Fin Material Aluminium (Blue Coat) Row / Stage 2 x 46 Air Volume High (Cooling / Heating) m³/min (ft³/min) 50.4 (1779) / 55.6 (1962) Refrigerant Control Device Expansion Valve Refrigerant Oil...

  • Page 9: Cu-5E34Qbr

    CU-5E34QBR Item Unit OUTDOOR UNIT Indoor Unit Combination 2.0kW + 2.0kW + 2.0kW + 2.0kW + 2.0kW Phase, Hz Single, 50 Power Source Min. Mid. Max. 2.90 10.00 11.50 Capacity BTU/h 9890 34100 39200 Running Current 13.6 13.2 Power Input 0.55 2.86 3.86...
  • Page 10 Item Unit OUTDOOR UNIT Type Plate fin configuration forced draft type Tube Material Copper Heat Exchanger Fin Material Aluminium (Blue Coat) Row / Stage 2 x 46 Air Volume High (Cooling / Heating) m³/min (ft³/min) 60.8 (2146) / 70.1 (2475) Refrigerant Control Device Expansion Valve Refrigerant Oil...
  • Page 11  Multi Split Combination Possibility: A single outdoor unit enables air conditioning of up to four separate rooms for CU-4E23QBR.
  • Page 12 Multi Split Combination Possibility:  A single outdoor unit enables air conditioning of up to four separate rooms for CU-4E27QBR.  A single outdoor unit enables air conditioning of up to five separate rooms for CU-5E34QBR.
  • Page 13  Indoor Unit : CS-MRE5/7/9/12/18/24QKR, CS-E12/18QD3RW, CS- E12/18QB4RW  Outdoor Unit : CU-4E23QBR...
  • Page 15  Indoor Unit : CS-MRE5/7/9/12/18/24QKR, CS-E12/18QD3RW, CS- E12/18QB4RW  Outdoor Unit : CU-4E27QBR...
  • Page 17  Indoor Unit : CS-MRE5/7/9/12/18/24QKR, CS-E12/18QD3RW, CS- E12/18QB4RW  Outdoor Unit : CU-5E34QBR...

  • Page 21: Dimensions

    3. Dimensions CU-4E23QBR Space necessary for <Top View> installation 27.5 ( 131 ) 10 cm 10 cm 100 cm Anchor Bolt Pitch 620 x 380.5 <Side View> <Side View> <Front View> 23.8 Unit: mm CU-4E27QBR CU-5E34QBR Space necessary for <Top View>...

  • Page 22: Refrigeration Cycle Diagram

    4. Refrigeration Cycle Diagram CU-4E23QBR INDOOR A OUTDOOR PIPE EXPANSION TEMP. STRAINER VALVE A SENSOR LIQUID SIDE 3-WAY VALVE INTAKE TEMP. SENSOR PIPE PIPE TEMP. TEMP. SENSOR LIQUID SIDE SENSOR 3-WAY VALVE GAS SIDE EXPANSION STRAINER HEAT VALVE B EXCHANGER...

  • Page 23: Cu-4E27Qbr

    CU-4E27QBR INDOOR A OUTDOOR PIPE EXPANSION TEMP. STRAINER VALVE A SENSOR LIQUID SIDE 3-WAY VALVE INTAKE TEMP. SENSOR PIPE PIPE TEMP. TEMP. SENSOR LIQUID SIDE SENSOR 3-WAY VALVE GAS SIDE EXPANSION STRAINER HEAT VALVE B EXCHANGER 3-WAY VALVE PIPE (EVAPORATOR) TEMP.

  • Page 24: Cu-5E34Qbr

    CU-5E34QBR INDOOR A OUTDOOR PIPE EXPANSION TEMP. STRAINER VALVE A SENSOR LIQUID SIDE 3-WAY VALVE INTAKE TEMP. SENSOR PIPE PIPE TEMP. TEMP. SENSOR SENSOR LIQUID SIDE 3-WAY VALVE EXPANSION GAS SIDE STRAINER HEAT VALVE B EXCHANGER 3-WAY VALVE PIPE (EVAPORATOR) TEMP.

  • Page 25: Block Diagram

    5. Block Diagram CU-4E23QBR...

  • Page 26: Cu-4E27Qbr

    CU-4E27QBR...

  • Page 27: Cu-5E34Qbr

    CU-5E34QBR...

  • Page 28: Wiring Connection Diagram

    6. Wiring Connection Diagram CU-4E23QBR...

  • Page 29: Cu-4E27Qbr

    CU-4E27QBR...

  • Page 30: Cu-5E34Qbr

    CU-5E34QBR...

  • Page 31: Electronic Circuit Diagram

    7. Electronic Circuit Diagram CU-4E23QBR...

  • Page 32: Cu-4E27Qbr

    CU-4E27QBR...

  • Page 33: Cu-5E34Qbr

    CU-5E34QBR...

  • Page 34: Printed Circuit Board

    8. Printed Circuit Board Main Printed Circuit Board 8.1.1 CU-4E23QBR...
  • Page 35 8.1.2 CU-4E27QBR CU-5E34QBR...

  • Page 36: Noise Filter Printed Circuit Board

    Noise Filter Printed Circuit Board 8.2.1 CU-4E23QBR 8.2.2 CU-4E27QBR CU-5E34QBR...

  • Page 37: Display Printed Circuit Board

    Display Printed Circuit Board 8.3.1 CU-4E23QBR 8.3.2 CU-4E27QBR CU-5E34QBR...

  • Page 38: Installation Information

    9. Installation Information CU-4E23QBR 9.1.1 Check Points...

  • Page 39: Cu-4E27Qbr

    CU-4E27QBR 9.2.1 Check Points...

  • Page 40: Cu-5E34Qbr

    CU-5E34QBR 9.3.1 Check Points...

  • Page 41: Installation Instruction

    10. Installation Instruction 10.1 Select the Best Location (For CU-4E23QBR only)  If an awning is built over 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.

  • Page 42: Install The Outdoor Unit

    Outdoor Unit Installation Guidelines  Where a wall or other obstacle is in the path of outdoor unit’s intake or exhaust airflow, follow the installation guidelines below.  For any of the below installation patterns, the wall height on the exhaust side should be 1200 mm or less. 10.2 Install the Outdoor Unit ...

  • Page 43: Evacuation Of The Equipment

    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 is not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe. 3.

  • Page 44: Connect The Cable To The Outdoor Unit

    10.5 Connect the Cable to the Outdoor Unit 1. Remove the control board cover metal from 4. Connect the power supply cord and the unit by loosening two screws. connecting cable between indoor unit and 2. Cable connection to the power supply through outdoor unit according to the diagram as isolating Devices (Disconnecting means).

  • Page 45: Heat Insulation

    10.6 Heat Insulation Use a material with good heat-resistant properties as the heat insulation for the Material shall Liquid-side pipes pipes. Be sure to insulate both the gas-side and liquid-side pipes. If the pipes are withstand Gas-side pipes not adequately insulated, condensation or water leakages may occur. 120°C or higher 10.7 Disposal of Outdoor Unit Drain Water ...

  • Page 46: Installation Instruction

    11. Installation Instruction 11.1 Select the Best Location (For CU-4E27QBR and CU-5E34QBR only)  If an awning is built over 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.

  • Page 47: Install The Outdoor Unit

    Outdoor Unit Installation Guidelines  Where a wall or other obstacle is in the path of outdoor unit’s intake or exhaust airflow, follow the installation guidelines below.  For any of the below installation patterns, the wall height on the exhaust side should be 1200 mm or less. 11.2 Install the Outdoor Unit ...

  • Page 48: Evacuation Of The Equipment

    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 is not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe. 3.

  • Page 49: Connect The Cable To The Outdoor Unit

    11.5 Connect the Cable to the Outdoor Unit 1. Remove the particular plate from the unit by 4. Connect the power supply cord and loosening two screws. connection cable between indoor unit and 2. Cable connection to the power supply through outdoor unit according to the diagram as Isolating Devices (Disconnecting means).

  • Page 50: Heat Insulation

    5. For wire stripping and connection requirement, refer to the diagram below. 6. Secure the power supply cord and connection cables onto the control board with the holder. 7. Attach the particular plate back to the original position with screw. 11.6 Heat Insulation Use a material with good heat-resistant properties as the heat insulation for the Material shall...

  • Page 51: Operation Control

    12. Operation Control 12.1 Cooling Operation 12.1.1 Outdoor fan control  When cooling operation is enabled, based on outdoor ambient temperature, fan motor control will be adjusted according to figure below: 12.1.2 Annual Cooling control  This control is to enable cooling operation when outdoor ambient temperature is low. ...

  • Page 52: Heating Operation

    12.2 Heating Operation 12.2.1 Outdoor Fan Control  When heating operation is enabled, based on outdoor ambient temperature, fan motor control will be adjusted according to figure below for Heating overload control: 12.2.2 Heating Room Temp Sampling Control  To improve the judgment accuracy, indoor room temperature sampling starts when any indoor unit has stopped capability supplied (heating thermo-off) during heating operation with compressor ON, outdoor unit will send signal to all thermo-off indoor units to ON fan motor and get room temperature sample.

  • Page 53: Simultaneous Operation Control

    13. Simultaneous Operation Control  Operation modes which can be selected using the remote control unit: Automatic, Cooling, Dry, Heating and e-ion operation mode.  Types of operation modes which can be performed simultaneously Cooling operation and Cooling, Dry or e-ion operation. Heating operation and Heating operation.

  • Page 54: Protection Control

    14. Protection Control 14.1 Freeze Prevention Control (Cool)  When received freeze prevention signal from indoor unit, the compressor frequency changes according to indoor heat exchanger temperature.  When indoor unit request capability OFF due to freeze condition, immediately the capability supply to targeted indoor unit stops.

  • Page 55: Cooling Overload Control (Cool)

    14.5 Cooling Overload Control (Cool)  This control detect outdoor pipe temperature and perform the compressor frequency restriction during cooling operation. 14.6 Heating Overload Control (Heat)  This control detect indoor pipe temperature and perform the compressor frequency restriction during heating operation.

  • Page 56: Deice Control

    14.8 Deice Control  When outdoor pipe temperature and outdoor air temperature is low, deice operation starts where indoor fan motor and outdoor fan motor stop, indoor unit horizontal vane close and operation LED blink with compressor ON. 14.9 Time Delay Safety Control (Restart Control) ...

  • Page 57: Compressor Protection Control (Gas Leak Detection Control 1)

    14.13 Compressor Protection Control (Gas Leak Detection Control 1)  Control start conditions For 5 minutes, the compressor continuously operates and total current is low. During Cooling or Soft Dry operation: Indoor intake temperature — indoor piping temperature is below 4°C. During Heating operation: Indoor pipe temperature —...

  • Page 58: Servicing Mode

    ODOUR WASH operation is disabled. (Odour cut operation is still enabled.) To revert back the setting to heat pump operation, switch OFF the equipment power, reconnect JP1 (COOL ONLY) back to short circuit condition and switch ON the equipment power. CU-4E23QBR CU-4E27QBR 5E34QBR 15.1.1 Pump Down Operation ...
  • Page 59 CU-4E23QBR CU-4E27QBR 5E34QBR 15.1.2 Test Run Operation  Test operation can be carried out using TEST OPERATION button (SW2) on the Service PCB inside the outdoor unit.  For Cooling test, press the TEST OPERATION button (SW2) for 5 seconds or more but less than 10 seconds, LED1 and LED 2 will illuminate when shift into cooling test operation.
  • Page 60 1. For two rooms, LED 4 and 5 are not illuminated and for three rooms, LED 5 is not illuminated after wiring operation complete. (CU-4E23QBR) 2. For two rooms, LED 4,5 and 6 are not illuminated, for three rooms, LED 5 and 6 are not illuminated and for four rooms, LED 6 is not illuminated after wiring operation complete.

  • Page 61: Troubleshooting Guide

    16. Troubleshooting Guide 16.1 Self Diagnosis Function  The display screen of wireless remote control unit and the self-diagnosis LEDs (green) on the outdoor printed circuit board in the outdoor unit can be used to identify the location of the problem. Refer to the table below to identify and solve the cause of the problem, and then re-start the air conditioner system.

  • Page 64: Disassembly And Assembly Instructions

    High voltages 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. 17.1 Outdoor Unit Removal Procedure (CU-4E23QBR) Caution! When handling electronic controller, be careful of electrostatic discharge.
  • Page 65 17.1.2 Remove the Control Board Cover and Particular Plates 3. Remove the control board cover (remove 3 screws). 4. Remove the particular plate (remove 2 screws). 5. Remove the particular plate (remove 2 screws). 17.1.3 Removing the Control P.C. Board 6.
  • Page 66 17.1.4 Removing the Propeller Fan and Fan Motor 1. Follow the steps in 18.2.1 for removing the cabinet top plate and cabinet front plate. 2. Remove the propeller fan by removing the nut turning clockwise at its center. 3. Disconnect the fan motor connector from the control P.C.

  • Page 67: Outdoor Unit Removal Procedure (Cu-4E27Qbr Cu-5E34Qbr)

    17.2 Outdoor Unit Removal Procedure (CU-4E27QBR CU-5E34QBR) Caution! When handling electronic controller, be careful of electrostatic discharge. 17.2.1 Removing the Cabinet Top Plate 3. Remove the cabinet top plate (remove the 11 screws). Fig. 1 17.2.2 Remove the Control Board Cover and Particular Plates 2.
  • Page 68 10. Remove the particular plate (remove the 3 screws). Fig. 3 11. Remove the particular plate (remove the 8 screws). Fig. 4 17.2.3 Removing the Cabinet Front Plate 12. Remove the cabinet front plate (remove the 7 screws). Fig. 5...
  • Page 69 17.2.4 Removing the Control P.C. Board 13. Remove the cover by release the screw. Fig. 6 14. Disconnect the connectors (lead wires of the compressor, sensors, and others). 15. Release the Control P.C. Board tab to remove the Control P.C. Board. Fig.

  • Page 70: Technical Data

    18. Technical Data 18.1 Operation Characteristics (CU-4E23QBR) 18.1.1 One Indoor Unit Operation  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Cooling (2.0: CS-MRE7QKR), service mode frequency = 32 Hz...
  • Page 71  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz B) Indoor unit capacity: Cooling (2.5: CS-MRE9QKR), service mode frequency = 32 Hz...
  • Page 72  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Cooling (3.2: CS-MRE12QKR), service mode frequency = 35 Hz...
  • Page 73  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Heating (2.0: CS-MRE7QKR), service mode frequency = 49 Hz...
  • Page 74  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz B) Indoor unit capacity: Heating (2.5: CS-MRE9QKR), service mode frequency = 49 Hz...
  • Page 75  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Heating (3.2: CS-MRE12QKR), service mode frequency = 49 Hz...
  • Page 76 18.1.2 Two Indoor Units Operation  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Cooling (3.2 + 2.5: CS-MRE12QKR + CS-MRE9QKR), service mode frequency = 42 Hz...
  • Page 77  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Heating (3.2 + 2.5: CS-MRE12QKR + CS-MRE9QKR), service mode frequency = 75 Hz...
  • Page 78 18.1.3 Three Indoor Units Operation  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Cooling (3.2 + 2.5 + 2.0: CS-MRE12QKR + CS-MRE9QKR + CS-MRE7QKR), service mode frequency = 49 Hz...
  • Page 79  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Heating (3.2 + 2.5 + 2.0: CS-MRE12QKR + CS-MRE9QKR + CS-MRE7QKR), service mode frequency = 75 Hz...
  • Page 80 18.1.4 Four Indoor Units Operation  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Cooling (3.2 + 2.5 + 2.5 + 2.0: CS-MRE12QKR + CS-MRE9QKR x2 + CS-MRE7QKR), service mode frequency = 59 Hz...
  • Page 81  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Heating (3.2 + 2.5 + 2.5 + 2.0: CS-MRE12QKR + CS-MRE9QKR x2 + CS-MRE7QKR), service mode frequency = 90 Hz...

  • Page 82: Operation Characteristics (Cu-4E27Qbr)

    18.2 Operation Characteristics (CU-4E27QBR) 18.2.1 One Indoor Unit Operation  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Cooling (2.0: CS-MRE7QKR), service mode frequency = 20 Hz...
  • Page 83  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz B) Indoor unit capacity: Cooling (2.5: CS-MRE9QKR), service mode frequency = 20 Hz...
  • Page 84  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Cooling (3.2: CS-MRE12QKR), service mode frequency = 34 Hz...
  • Page 85  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz D) Indoor unit capacity: Cooling (5.0: CS-MRE18QKR), service mode frequency = 49 Hz...
  • Page 86  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Heating (2.0: CS-MRE7QKR), service mode frequency = 39 Hz...
  • Page 87  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz B) Indoor unit capacity: Heating (2.5: CS-MRE9QKR), service mode frequency = 39 Hz...
  • Page 88  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Heating (3.2: CS-MRE12QKR), service mode frequency = 47 Hz...
  • Page 89  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz D) Indoor unit capacity: Heating (5.0: CS-MRE18QKR), service mode frequency = 55 Hz...
  • Page 90 18.2.2 Two Indoor Units Operation  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Cooling (2.0 + 2.5: CS-MRE7QKR + CS-MRE9QKR), service mode frequency = 49 Hz...
  • Page 91  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz B) Indoor unit capacity: Cooling (2.0 + 3.2: CS-MRE7QKR + CS-MRE12QKR), service mode frequency = 49 Hz...
  • Page 92  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Cooling (2.0 + 5.0: CS-MRE7QKR + CS-MRE18QKR), service mode frequency = 51 Hz...
  • Page 93  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz D) Indoor unit capacity: Cooling (2.5 + 3.2: CS-MRE9QKR + CS-MRE12QKR), service mode frequency = 49 Hz...
  • Page 94  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz E) Indoor unit capacity: Cooling (2.5 + 5.0: CS-MRE9QKR + CS-MRE18QKR), service mode frequency = 51 Hz...
  • Page 95  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz F) Indoor unit capacity: Cooling (3.2 + 5.0: CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 53 Hz...
  • Page 96  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Heating (2.0 + 2.5: CS-MRE7QKR + CS-MRE9QKR), service mode frequency = 58 Hz...
  • Page 97  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz B) Indoor unit capacity: Heating (2.0 + 3.2: CS-MRE7QKR + CS-MRE12QKR), service mode frequency = 64 Hz...
  • Page 98  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Heating (2.0 + 5.0: CS-MRE7QKR + CS-MRE18QKR), service mode frequency = 68 Hz...
  • Page 99  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz D) Indoor unit capacity: Heating (2.5 + 3.2: CS-MRE9QKR + CS-MRE12QKR), service mode frequency = 64 Hz...
  • Page 100  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz E) Indoor unit capacity: Heating (2.5 + 5.0: CS-MRE9QKR + CS-MRE18QKR), service mode frequency = 68 Hz...
  • Page 101  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz F) Indoor unit capacity: Heating (3.2 + 5.0: CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 73 Hz...
  • Page 102 18.2.3 Three Indoor Units Operation  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Cooling (2.0 + 2.5 + 3.2: CS-MRE7QKR + CS-MRE9QKR + CS-MRE12QKR), service mode frequency = 55 Hz...
  • Page 103  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz B) Indoor unit capacity: Cooling (2.0 + 2.5 + 5.0: CS-MRE7QKR + CS-MRE9QKR + CS-MRE18QKR), service mode frequency = 57 Hz...
  • Page 104  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Cooling (2.0 + 3.2 + 5.0: CS-MRE7QKR + CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 59 Hz...
  • Page 105  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz D) Indoor unit capacity: Cooling (2.5 + 3.2 + 5.0: CS-MRE9QKR + CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 59 Hz...
  • Page 106  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Heating (2.0 + 2.5 + 3.2: CS-MRE7QKR + CS-MRE9QKR + CS-MRE12QKR), service mode frequency = 77 Hz...
  • Page 107  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz B) Indoor unit capacity: Heating (2.0 + 2.5 + 5.0: CS-MRE7QKR + CS-MRE9QKR + CS-MRE18QKR), service mode frequency = 77 Hz...
  • Page 108  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Heating (2.0 + 3.2 + 5.0: CS-MRE7QKR + CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 82 Hz...
  • Page 109  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz D) Indoor unit capacity: Heating (2.5 + 3.2 + 5.0: CS-MRE9QKR + CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 82 Hz...
  • Page 110 18.2.4 Four Indoor Units Operation  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Cooling (2.0 + 2.5 + 3.2 + 5.0: CS-MRE7QKR + CS-MRE9QKR + CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 65 Hz...
  • Page 111  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Heating (2.0 + 2.5 + 3.2 + 5.0: CS-MRE7QKR + CS-MRE9QKR + CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 86 Hz...

  • Page 112: Operation Characteristics (Cu-5E34Qbr)

    18.3 Operation Characteristics (CU-5E34QBR) 18.3.1 One Indoor Unit Operation  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Cooling (2.0: CS-MRE7QKR), service mode frequency = 20 Hz...
  • Page 113  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz B) Indoor unit capacity: Cooling (2.5: CS-MRE9QKR), service mode frequency = 20 Hz...
  • Page 114  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Cooling (3.2: CS-MRE12QKR), service mode frequency = 34 Hz...
  • Page 115  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz D) Indoor unit capacity: Cooling (5.0: CS-MRE18QKR), service mode frequency = 49 Hz...
  • Page 116  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Heating (2.0: CS-MRE7QKR), service mode frequency = 39 Hz...
  • Page 117  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz B) Indoor unit capacity: Heating (2.5: CS-MRE9QKR), service mode frequency = 39 Hz...
  • Page 118  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Heating (3.2: CS-MRE12QKR), service mode frequency = 47 Hz...
  • Page 119  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz D) Indoor unit capacity: Heating (5.0: CS-MRE18QKR), service mode frequency = 55 Hz...
  • Page 120 18.3.2 Two Indoor Units Operation  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Cooling (2.0 + 2.5: CS-MRE7QKR + CS-MRE9QKR), service mode frequency = 49 Hz...
  • Page 121  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz B) Indoor unit capacity: Cooling (2.0 + 3.2: CS-MRE7QKR + CS-MRE12QKR), service mode frequency = 49 Hz...
  • Page 122  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Cooling (2.0 + 5.0: CS-MRE7QKR + CS-MRE18QKR), service mode frequency = 51 Hz...
  • Page 123  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz D) Indoor unit capacity: Cooling (2.5 + 3.2: CS-MRE9QKR + CS-MRE12QKR), service mode frequency = 49 Hz...
  • Page 124  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz E) Indoor unit capacity: Cooling (2.5 + 5.0: CS-MRE9QKR + CS-MRE18QKR), service mode frequency = 51 Hz...
  • Page 125  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz F) Indoor unit capacity: Cooling (3.2 + 5.0: CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 53 Hz...
  • Page 126  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Heating (2.0 + 2.5: CS-MRE7QKR + CS-MRE9QKR), service mode frequency = 58 Hz...
  • Page 127  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz B) Indoor unit capacity: Heating (2.0 + 3.2: CS-MRE7QKR + CS-MRE12QKR), service mode frequency = 64 Hz...
  • Page 128  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Heating (2.0 + 5.0: CS-MRE7QKR + CS-MRE18QKR), service mode frequency = 68 Hz...
  • Page 129  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz D) Indoor unit capacity: Heating (2.5 + 3.2: CS-MRE9QKR + CS-MRE12QKR), service mode frequency = 64 Hz...
  • Page 130  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz E) Indoor unit capacity: Heating (2.5 + 5.0: CS-MRE9QKR + CS-MRE18QKR), service mode frequency = 68 Hz...
  • Page 131  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz F) Indoor unit capacity: Heating (3.2 + 5.0: CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 73 Hz...
  • Page 132 18.3.3 Three Indoor Units Operation  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Cooling (2.0 + 2.5 + 3.2: CS-MRE7QKR + CS-MRE9QKR + CS-MRE12QKR), service mode frequency = 55 Hz...
  • Page 133  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz B) Indoor unit capacity: Cooling (2.0 + 2.5 + 5.0: CS-MRE7QKR + CS-MRE9QKR + CS-MRE18QKR), service mode frequency = 57 Hz...
  • Page 134  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Cooling (2.0 + 3.2 + 5.0: CS-MRE7QKR + CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 59 Hz...
  • Page 135  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz D) Indoor unit capacity: Cooling (2.5 + 3.2 + 5.0: CS-MRE9QKR + CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 59 Hz...
  • Page 136  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Heating (2.0 + 2.5 + 3.2: CS-MRE7QKR + CS-MRE9QKR + CS-MRE12QKR), service mode frequency = 77 Hz...
  • Page 137  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz B) Indoor unit capacity: Heating (2.0 + 2.5 + 5.0: CS-MRE7QKR + CS-MRE9QKR + CS-MRE18QKR), service mode frequency = 77 Hz...
  • Page 138  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz C) Indoor unit capacity: Heating (2.0 + 3.2 + 5.0: CS-MRE7QKR + CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 82 Hz...
  • Page 139  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz D) Indoor unit capacity: Heating (2.5 + 3.2 + 5.0: CS-MRE9QKR + CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 82 Hz...
  • Page 140 18.3.4 Four Indoor Units Operation  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Cooling (2.0 + 2.5 + 3.2 + 5.0: CS-MRE7QKR + CS-MRE9QKR + CS-MRE12QKR + MRE18QKR), service mode frequency = 65 Hz...
  • Page 141  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Heating (2.0 + 2.5 + 3.2 + 5.0: CS-MRE7QKR + CS-MRE9QKR + CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 86 Hz...
  • Page 142 18.3.5 Five Indoor Units Operation  Cooling Characteristic [Condition] Room temperature: 27°C (DBT), 19°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Cooling (2.0 + 2.5 + 3.2 + 3.2 + 5.0: CS-MRE7QKR + CS-MRE9QKR + CS-MRE12QKR + CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 75 Hz...
  • Page 143  Heating Characteristic [Condition] Room temperature: 20°C (DBT), 12°C (WBT) Operation condition: High fan speed Piping Length: 5 m 230V 50Hz A) Indoor unit capacity: Heating (2.0 + 2.5 + 3.2 + 3.2 + 5.0: CS-MRE7QKR + CS-MRE9QKR + CS-MRE12QKR + CS-MRE12QKR + CS-MRE18QKR), service mode frequency = 95 Hz...

  • Page 144: Exploded View And Replacement Parts List

    19. Exploded View and Replacement Parts List 19.1 CU-4E23QBR 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 145 SAFETY REF. NO. DESCRIPTION & NAME QTY. CU-4E23QBR REMARK CHASSY ASSY CWD52K1212 SOUND PROOF BOARD CWH151194 FAN MOTOR BRACKET CWD541127 SCREW-BRACKET FAN MOTOR CWH551217 CONDENSER COMPLETE CWB32C3999 FAN MOTOR, DC 60W 3PH EHDS80C60AC SCREW-FAN MOTOR MOUNT CWH551323 PROPELLER FAN ASSY...
  • Page 146 SAFETY REF. NO. DESCRIPTION & NAME QTY. CU-4E23QBR REMARK CABINET TOP PLATE CWE031083A CONTROL BOARD COVER CWH13C1194 CABINET FRONT PLATE CWE06K1065 CABINET SIDE PLATE CWE041317A CABINET SIDE PLATE CWE041395A WIRE NET CWD041128A HANDLE CWE161010 TERMINAL COVER CWH171035 NUT-TERMINAL COVER CWH7080300J...

  • Page 147: Cu-4E27Qbr Cu-5E34Qbr

    19.2 CU-4E27QBR CU-5E34QBR 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 148 SAFETY REF. NO. DESCRIPTION & NAME QTY. CU-4E27QBR CU-5E34QBR REMARK BASE PAN ASS'Y CWD52K1345A ← SOUND-PROOF BOARD CWH151367 ← FAN MOTOR BRACKET CWD54K1081 ← SCREW-BRACKET FAN MOTOR CWH551217 ← CONDENSER COMPLETE CWB32C4000 ← FAN MOTOR L6CBYYYL0098 ← SCREW-FAN MOTOR MOUNT CWH551323 ←...
  • Page 149 SAFETY REF. NO. DESCRIPTION & NAME QTY. CU-4E27QBR CU-5E34QBR REMARK CABINET SIDE PLATE-COMPLETE CWE04C1462 ← CABINET FRONT PLATE CWE06C1475 ← CABINET SIDE PLATE CWE041734A ← CABINET FRONT PLATE-COMPLETE CWE06C1476 ← WIRE NET CWD041203A ← HANDLE CWE161021 ← TERMINAL COVER CWH171039A ←...

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