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Panasonic CU-4E24RBU Service Manual

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Please file and use this manual together with the service manual for Model No. CS-E9RKUAW CS-E12RKUAW CS-E18RKUAW,
CS-E24RKUAW,
CS-ME7RKUA,
PAPAMY1503094CE, PAPAMY1503095CE, PAPAMY1505112CE.
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.
There are special components used in this equipment which are important for safety. These parts are marked by
Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that these critical parts should be replaced
with manufacturer's specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of
manufacturer.
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
CS-E12RB4UW,
CS-E18RB4UW,
WARNING
IMPORTANT SAFETY NOTICE
PRECAUTION OF LOW TEMPERATURE
Order No: PAPAMY1505100CE

Air Conditioner

CS-ME5RKUA,
Order
No.
© Panasonic Corporation 2015

Outdoor Unit

CU-3E19RBU
CU-4E24RBU
Destination
U.S.A.
Canada
PAPAMY1501049CE,
in the Schematic
!

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Summary of Contents for Panasonic CU-4E24RBU

  • Page 1: Air Conditioner

    Do not modify the original design without permission of manufacturer. 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 2015...

  • Page 2: Table Of Contents

    13.13 Compressor Protection Control (Gas leak detection control 1) ....47 CU-3E19RBU ..........5 13.14 Compressor Protection Control CU-4E24RBU ..........7 (Gas leak detection control 2) ....47 3. Dimensions ............16 13.15 Valve close detection control ......48 13.16 Compressor discharge high pressure CU-3E19RBU ..........

  • 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 18. For R410A models, when connecting the piping, do not use any existing (R22) pipes and flare nuts. Using such same may cause abnormally high pressure in the refrigeration cycle (piping), and possibly result in explosion and injury. Use only R410A materials.

  • Page 5: Specifications

    2. Specifications CU-3E19RBU Item Unit OUTDOOR UNIT Indoor Unit Combination 1.6kW + 2.0kW + 2.0kW Power Source 1 Phase, 208-230V, 60Hz (Power supply from outdoor unit) 5.58 (1.8 ~ 7.3) Capacity BTU/h 19000 (6100 ~ 24800) Running Current 7.4 - 6.7 Power Input 1.51 (0.36 ~ 2.42) Electrical...
  • Page 6 Item Unit OUTDOOR UNIT Refrigerant (R410A) g (oz) 2.64k (93.2) Dry Bulb Wet Bulb Maximum °C (°F) 32 (89.6) 23 (73.4) Cooling Minimum °C (°F) 16 (60.8) 11 (51.8) Indoor Operation Range Maximum °C (°F) 30 (86.0) — Heating Minimum °C (°F) 16 (60.8) —...

  • Page 7: Cu-4E24Rbu

    CU-4E24RBU Item Unit OUTDOOR UNIT Indoor Unit Combination 1.6kW + 1.6kW + 2.0kW + 2.0kW Power Source 1 Phase, 208-230V, 60Hz (Power supply from outdoor unit) 7.02 (3.0 ~ 9.2) Capacity BTU/h 24000 (10200 ~ 31400) Running Current 9.9 - 8.9 Power Input 1.91 (0.53 ~ 2.87)
  • Page 8 Item Unit OUTDOOR UNIT Dry Bulb Wet Bulb Maximum °C (°F) 32 (89.6) 23 (73.4) Cooling Minimum °C (°F) 16 (60.8) 11 (51.8) Indoor Operation Range Maximum °C (°F) 30 (86.0) — Heating Minimum °C (°F) 16 (60.8) — Maximum °C (°F) 46 (114.8) 26 (78.8)
  • Page 9  Multi Split Combination Possibility: A single outdoor unit enables air conditioning of up to three separate rooms for CU-3E19RBU. A single outdoor unit enables air conditioning of up to four separate rooms for CU-4E24RBU. OUTDOOR UNIT CONNECTABLE INDOOR UNIT...
  • Page 10  ndoor Unit : C CS-ME5RKU UA, CS-ME7R RKUA, CS-E E9RKUAW, C CS-E12RKUA A W, CS-E18 8 RKUAW, CS-E12RB4U W, S-E18RB4U  utdoor Unit : : CU-3E19RB...
  • Page 12  ndoor Unit : C CS-ME5RKU UA, CS-ME7R RKUA, CS-E E9RKUAW, C CS-E12RKUA A W, CS-E18 8 RKUAW, CS S -E24RKUA A W, S-E12RB4U W, CS-E18R RB4UW  utdoor Unit : : CU-4E24RB...

  • Page 16: Dimensions

    34-15/32 (875) (59) 12-5/8 (320) 1-21/32 (42) 15/16 (23.8) 2-3/64 (52) Unit: inch (mm) CU-4E24RBU Space necessary for <Top View> installation 6-11/16 (170) 24-13/32 (620) 3-15/16 (10 cm) 3-15/16 (10 cm) 39-3/8 (100 cm) Anchor Bolt Pitch 24-13/32 (620) x 14-31/32 (380.5) <Side View>...

  • Page 17: Refrigeration Cycle Diagram

    4. Refrigeration Cycle Diagram CU-3E19RBU 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 STRAINER EXPANSION GAS SIDE HEAT VALVE B EXCHANGER 3-WAY VALVE PIPE (EVAPORATOR)

  • Page 18: Cu-4E24Rbu

    CU-4E24RBU 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 STRAINER EXPANSION GAS SIDE HEAT VALVE B EXCHANGER 3-WAY VALVE PIPE (EVAPORATOR) TEMP.

  • Page 19: Block Diagram

    5. Block Diagram CU-3E19RBU...

  • Page 20: Cu-4E24Rbu

    CU-4E24RBU...

  • Page 21: Wiring Connection Diagram

    6. Wiring Connection Diagram CU-3E19RBU...

  • Page 22: Cu-4E24Rbu

    CU-4E24RBU...

  • Page 23: Electronic Circuit Diagram

    7. Electronic Circuit Diagram CU-3E19RBU...

  • Page 24: Cu-4E24Rbu

    CU-4E24RBU...

  • Page 25: Printed Circuit Board

    8. Printed Circuit Board Main Printed Circuit Board 8.1.1 CU-3E19RBU POWER TRANSISTOR (IPM) CURRENT TRANSFORMER (CT) CN-DISP2 CN-EV1 CN-TH1 CN-NMODE CN-EV2 CN-DIS CN-TH3 CN-EV3 CN-TH2 CN-TH4 CN-PSW1 CN-DISP1 CN-FM1...
  • Page 26 8.1.2 CU-4E24RBU POWER TRANSISTOR (IPM) CURRENT TRANSFORMER (CT) CN-DISP2 CN-EV1 CN-TH1 CN-NMODE CN-EV2 CN-DIS CN-TH3 CN-EV3 CN-TH2 CN-EV4 CN-EV5 CN-TH4 CN-PSW1 CN-DISP1 CN-FM1...

  • Page 27: Noise Filter Printed Circuit Board

    Noise Filter Printed Circuit Board 8.2.1 CU-3E19RBU CN-COM CN-DATA CN-WHT CN-BLK 8.2.2 CU-4E24RBU CN-COM CN-DATA CN-WHT CN-BLK...

  • Page 28: Display Printed Circuit Board

    Display Printed Circuit Board 8.3.1 CU-3E19RBU CN-DISP1 CN-NMODE1 CN-NMODE2 LED1 LED2 LED3 LED4 LED5 LED6 8.3.2 CU-4E24RBU CN-NMODE1 CN-DISP1...

  • Page 29: Installation Information

    9. Installation Information CU-3E19RBU 9.1.1 Check Points Indoor/outdoor unit connection cables (Not included in the unit) Flexible cord x 4 core Unit C (polychloroprene sheathed) Outdoor unit power supply: Single-phase 208-230V, 60Hz (Not included in the unit) Allowable Unit B elevation: 15 m (49.2 ft) max.

  • Page 30: Cu-4E24Rbu

    CU-4E24RBU 9.2.1 Check Points Indoor/outdoor unit connection cables (Not included in the unit) Flexible cord x 4 core Unit D (polychloroprene sheathed) (Not included in the unit) Flexible cord x 4 core Unit C (polychloroprene sheathed) Outdoor unit power supply:...

  • Page 31: Installation Instruction

    10. Installation Instruction 10.1 CU-3E19RBU 10.1.1 Select The Best Location  If an awning is built over the unit to prevent direct sunlight or rain, be careful that heat radiation from 10.1.1.1 Outdoor Unit Installation the condenser is not obstructed. Diagram ...
  • Page 32 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 47-1/4" (1200 mm) or less.
  • Page 33 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 34 10.1.5 Connect The Cable To The Outdoor Unit 1. Remove Control Board Cover (Metal) by loosening 2 screws. 2. Remove Valve Cover (Metal) by loosening 2 Outdoor Unit Terminal Terminal 208/230V min AWG16 screws. 208/230V min AWG16 Indoor 3. Remove Plugs. Unit A 208/230V min AWG16 Unit A...
  • Page 35 10.1.6 Heat Insulation Use a material with good heat-resistant properties as the heat insulation for the Liquid-side pipes Material shall pipes. Be sure to insulate both the gas-side and liquid-side pipes. If the pipes are withstand 248°F Gas-side pipes not adequately insulated, condensation or water leakages may occur. (120°C) or higher 10.1.7 Disposal Of Outdoor Unit Drain Water...

  • Page 36: Cu-4E24Rbu

    10.2 CU-4E24RBU 10.2.1 Select The Best Location  If an awning is built over the unit to prevent direct sunlight or rain, be careful that heat radiation from 10.2.1.1 Outdoor Unit Installation the condenser is not obstructed. Diagram  There should not be any animal or plant which could be affected by hot air discharged.
  • Page 37 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 47-1/4" (1200 mm) or less.
  • Page 38 CUTTING AND FLARING THE PIPING 1. Please cut using pipe cutter and then remove the burrs. 2. Remove the burrs by using a reamer. If burrs are not removed, gas leakage may occur. Turn the piping end down to avoid the metal powder entering the pipe. 3.
  • Page 39 10.2.5 Connect The Cable To The Outdoor Unit 1. Remove Plugs. Outdoor Unit Terminal Terminal 208/230V min AWG16 2. Fix the conduit connectors to the knock out 208/230V min AWG16 Indoor 208/230V min AWG16 Unit A holes with lock-nuts, then secure them. Unit A Grounding wire min AWG16 3.
  • Page 40 10.2.6 Heat Insulation Use a material with good heat-resistant properties as the heat insulation for the Liquid-side pipes Material shall pipes. Be sure to insulate both the gas-side and liquid-side pipes. If the pipes are withstand 248°F Gas-side pipes not adequately insulated, condensation or water leakages may occur. (120°C) or higher 10.2.7 Disposal Of Outdoor Unit Drain Water...

  • Page 41: Operation Control

    11. Operation Control 11.1 Cooling Operation 11.1.1 Outdoor fan control  When cooling operation is enabled, based on outdoor ambient temperature, fan motor control will be adjusted according to figure below: RPM free 59.0°F (15°C) 55.4°F (13°C) RPM controlled 8.6°F (-13°C) Stopped OD temp.

  • Page 42: Heating Operation

    11.2 Heating Operation 11.2.1 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: RPM controlled 53.6°F (12°C) 50.0°F (10°C) RPM free OD temp.

  • Page 43: Simultaneous Operation Control

    12. 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 44: Protection Control

    13. Protection Control 13.1 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 45: Cooling Overload Control (Cool)

    13.5 Cooling overload control (Cool)  This control detect outdoor pipe temperature and perform the compressor frequency restriction during cooling operation. Comp stop 147.2°F (64°C) Comp freq restricted 140°F (60°C) 134.6°F (57°C) Comp freq free OD Pipe temp  The compressor will be stopped to avoid compressor overloading. COMP.

  • Page 46: Extreme Low Temperature Compressor Low Pressure Protection Control (Heat)

    If the running current does not exceed X value for 5 seconds, compressor frequency will increase.  However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for 3 minutes. CU-3E19RBU CU-4E24RBU Operation Mode X (A) Y (A) X (A) Y (A) 14.0...

  • Page 47: Ipm (Power Transistor) Protection Control

     The first 30 minutes of cooling operation, (A) will be applied. 102.2°F (39°C) 100.4°F (38°C) Outdoor air temperature 13.12 IPM (power transistor) Protection Control  Overheating Prevention Control If IPM temperature rises to 176°F (80°C), outdoor fan speed will be increased. When the IPM temperature rises to 203°F (95°C), compressor operation will stop immediately.

  • Page 48: Valve Close Detection Control

    13.15 Valve close detection control  This control detects 3-way valve close condition to prevent damage to refrigerant cycle.  Start conditions: For all connected indoor units, if Indoor intake temperature — indoor piping temperature are between 28.4°F (-2°C) and 35.6°F (2°C) continuously for 5 minutes after compressor ON at first cooling operation. The first cooling operation is defined as cooling operation is ON for less than 8 minutes after new installation or after pump down.

  • Page 49: Servicing Mode

    14. Servicing Mode 14.1 CU-3E19RBU Fig. 1 JP1 (COOL ONLY) SW1 (PUMP DOWN) OFF ON SW4 (POWER SW2 (OPERATION SAVE) TEST) OFF ON SW5 (MODE SW3 (WIRING PRIORITY) CHECK) 14.1.1 Pump down operation (SW1)  Operate the pump down process according to the following procedure. Confirm the valve on the liquid side and gas side are open.
  • Page 50 14.1.3 Wiring Error Check  The unit capable to correct the wiring error automatically by following procedures. Confirm the valve on the liquid side and gas side is open. Press WIRING CHECK button (SW3) on the Display PCB inside the outdoor unit for more than 10 seconds to start wiring check operation.

  • Page 51: Cu-4E24Rbu

    14.2 CU-4E24RBU Fig. 1 SW5 (MODE PRIORITY) SW4 (POWER SAVE) SW1 (PUMP DOWN) SW2 (OPERATION TEST) SW3 (WIRING CHECK) OFF ON OFF ON Unit A Unit B Unit C JP1 (COOL ONLY) Unit D 14.2.1 Pump down operation (SW1) ...
  • Page 52 14.2.3 Wiring Error Check  The unit capable to correct the wiring error automatically by following procedures. Confirm the valve on the liquid side and gas side is open. Press WIRING CHECK button (SW3) on the Display PCB inside the outdoor unit for more than 10 seconds to start wiring check operation.

  • Page 53: Troubleshooting Guide

    15. Troubleshooting Guide 15.1 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 54 Abnormality Diagnosis Abnormality Protection LED 6 LED 5 LED 4 LED 3 LED 2 LED 1 Problem Check location display protection judgment operation control  Check indoor Indoor heat exchanger operating unit Indoor freeze  Air filter dirty freeze protection (Cooling) ...

  • Page 55: Self-Diagnosis Method

    15.2 Self-diagnosis Method 15.2.1 H11 (Indoor/Outdoor Abnormal Communication) Malfunction Decision Conditions  During standby 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 outdoor unit PCB.
  • Page 56 Communication voltage measurement: about 50Vdc Indoor signal about 20Vdc Outdoor signal To determine if outdoor PCB or indoor PCB is faulty:  Start with outdoor terminal first.  Remove terminal 3 wire.  Measure with a multimeter (voltage in DC range). ...
  • Page 57 15.2.2 H12 (Indoor Unit Capacity Unmatched) Malfunction Decision Conditions  Occur when connect in a multi free inverter system.  However, for single split system (ONLY: CS-E21~24DKE; I/D capacity more than 5.0kW), when indoor and outdoor are disconnected from one another, H12 will appear but with conditions. Malfunction Caused ...
  • Page 58 15.2.3 H15 (Compressor Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the compressor discharge temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection.  Faulty sensor.
  • Page 59 15.2.4 H16 (Outdoor Current Transformer (CT) Abnormality) Malfunction Decision Conditions  A current transformer (CT) is detected by checking the compressor running frequency (≥ rated frequency) and CT detected input current (less than 1.25A) for continuously 20 seconds. Malfunction Caused ...
  • Page 60 15.2.5 H27 (Outdoor Air Temperature Sensor Abnormality) Malfunction Decision Conditions  During startup and operation of cooling and heating, the temperatures detected by the outdoor intake air temperature sensor are used to determine sensor errors. Malfunction Caused  Faulty connector connection. ...
  • Page 61 15.2.6 H28 (Outdoor Heat Exchanger Temperature Sensor 1 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 62 15.2.7 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 pipe temperature sensor 2 are used to determine sensor errors. Malfunction Caused  Faulty connector connection.
  • Page 63 15.2.8 H33 (Indoor / Outdoor Misconnection Abnormality) 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. Troubleshooting For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.
  • Page 64 15.2.9 H36 (Outdoor Gas Pipe Temperature 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 65 15.2.10 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 66 15.2.11 H97 (Outdoor Fan 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 stop due to short circuit inside the fan motor winding. ...
  • Page 67 15.2.12 H98 (Indoor High Pressure Protection) Malfunction Decision Conditions  During heating operation, the temperature detected by the indoor pipe temperature sensor is above 60°C (140°F). Malfunction Caused  Clogged air filter of the indoor unit.  Dust accumulation on the indoor unit heat exchanger. ...
  • Page 68 15.2.13 H99 (Indoor Operating Unit Freeze Protection) Malfunction Decision Conditions  During cooling operation, anti-freezing control take place when indoor pipe temperature is lower than 0°C (32°F). Malfunction Caused  Clogged air filter of the indoor unit.  Dust accumulation on the indoor unit heat exchanger. ...
  • Page 69 15.2.14 F11 (4-Way Valve Switching Abnormality) Malfunction Decision Conditions  During heating operation, when (liquid pipe temperature – outdoor pipe temperature) is below -5°C (23°F).  During cooling operation, when (outdoor pipe temperature – liquid pipe temperature) is below -5°C (23°F). Malfunction Caused ...
  • Page 70 15.2.15 F17 (Indoor Standby Units Freezing Abnormality) Malfunction Decision Conditions  When the difference between indoor intake air temperature and indoor pipe temperature is above 10°C (50°F) or indoor pipe temperature is below -1.0°C (30.2°F). Malfunction Caused  Wrong wiring connection. ...
  • Page 71 15.2.16 F90 (Power Factor Correction (PFC) Circuit Protection) Malfunction Decision Conditions  During startup and operation of cooling and heating, when PFC protection circuitry at the outdoor unit main PCB senses low DC voltage level (below 280Vdc). Malfunction Caused  Low DC voltage due to power supply drop.
  • Page 72 15.2.17 F91 (Refrigeration Cycle Abnormality) Malfunction Decision Conditions  Gas shortage detection I: A gas shortage is detected by checking the CT-detected input current value and the compressor running frequency. During startup and operating of cooling and heating, input current < 8.78/256 (A/Hz) x compressor running frequency + 0.25.
  • Page 73 15.2.18 F93 (Compressor Abnormal Revolution) 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. Abnormality Judgment:  4 times happen within 20 minutes. Troubleshooting For safety reason and to prevent component breakdown, always switch off the power before...
  • Page 74 15.2.19 F94 (Compressor Discharge Pressure Overshoot Protection) Malfunction Decision Conditions  During operation of cooling and heating, when the outdoor unit high pressure switch is open (4.15MPa and above). Malfunction Caused  Clogged air filter of indoor unit.  Dust accumulation on the indoor/outdoor unit heat exchanger. ...
  • Page 75 15.2.20 F96 (Power Transistor Module Overheating Protection) Malfunction Decision Conditions  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 (194°F)) is detected by the heat sink temperature sensor.
  • Page 76 15.2.21 F97 (Compressor Overheating Protection) Malfunction Decision Conditions  During operation of cooling and heating, when compressor discharge pipe temperature data (120°C (248°F)) is detected by the compressor discharge pipe temperature sensor. Malfunction Caused  Refrigerant shortage (refrigerant leakage).  2/3 way valve closed.
  • Page 77 15.2.22 F98 (Total Running Current Protection) Malfunction Decision Conditions  During operation of cooling and heating, when an input over-current (20.0A) is detected by checking the input current value being detected by current transformer (CT) with the compressor running. Malfunction Caused ...
  • Page 78 15.2.23 F99 (Outdoor Direct Current (DC) Peak Protection) Malfunction Decision Conditions  During operation of cooling and heating, when an output over-current is detected by checking the current that flows in the inverter DC Peak sensing circuitry. Malfunction Caused  DC peak due to compressor failure.

  • Page 79: Disassembly And Assembly Instructions

    16. Disassembly and Assembly Instructions WARNING 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. 16.1 Outdoor Unit Removal Procedure (CU-3E19RBU) Caution! When handling electronic controller, be careful of electrostatic discharge.
  • Page 80 16.1.3 Removing the Control P.C. Board 6. Remove the drip proof cover. 7. Disconnect the connectors (lead wires of the compressor, sensor, and others). 8. Remove the screw at the right side of the control box, and pull out the entire control box. 9.

  • Page 81: Outdoor Unit Removal Procedure (Cu-4E24Rbu)

    16.2 Outdoor Unit Removal Procedure (CU-4E24RBU) Caution! When handling electronic controller, be careful of electrostatic discharge. 16.2.1 Removing the Cabinet Top Plate 1. Remove the cabinet top plate (remove the 11 screws). Fig. 1 16.2.2 Remove the Control Board Cover and Particular Plates 2.
  • Page 82 4. Remove the particular plate (remove the 8 screws). Fig. 4 16.2.3 Removing the Cabinet Front Plate 5. Remove the cabinet front plate (remove the 7 screws). Fig. 5 16.2.4 Removing the Control P.C. Board 6. Remove the cover by release the screw. Fig.

  • Page 83: Fan Motor

    7. Disconnect the connectors (lead wires of the compressor, sensors, and others). 8. Release the Control P.C. Board tab to remove the Control P.C. Board. Fig. 7 16.2.5 Removing the Propeller Fan and Fan Motor 9. Remove the propeller fan by removing the nut turning clockwise as its center.

  • Page 84: Technical Data

    17. Technical Data 17.1 CU-3E19RBU 17.1.1 Operation Characteristics 17.1.1.1 One Indoor Unit Operation  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz A) Indoor unit capacity: Cooling (2.0: CS-ME7RKUA), service mode frequency = 32Hz ME7RKUA 61.0 (16.1) 60.0 (15.5)
  • Page 85  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz B) Indoor unit capacity: Cooling (2.5: CS-E9RKUAW), service mode frequency = 32Hz E9RKUAW 59.0 (15.0) 58.0 (14.4) 57.0 (13.8) 56.0 (13.3) 55.0 (12.7)
  • Page 86  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz C) Indoor unit capacity: Cooling (3.2: CS-E12RKUAW), service mode frequency = 35Hz E12RKUAW 57.0 (13.8) 56.0 (13.3) 55.0 (12.7) 54.0 (12.2) 53.0 (11.6)
  • Page 87  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz A) Indoor unit capacity: Heating (2.0: CS-ME7RKUA), service mode frequency = 49Hz ME7RKUA 115.0 (46.1) 110.0 (43.3) 105.0 (40.5) 100.0 (37.7) 95.0 (35.0)
  • Page 88  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz B) Indoor unit capacity: Heating (2.5: CS-E9RKUAW), service mode frequency = 49Hz E9RKUAW 120.0 (48.8) 115.0 (46.1) 110.0 (43.3) 105.0 (40.5) 100.0 (37.7)
  • Page 89  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz C) Indoor unit capacity: Heating (3.2: CS-E12RKUAW), service mode frequency = 49Hz E12RKUAW 115.0 (46.1) 110.0 (43.3) 105.0 (40.5) 100.0 (37.7) 95.0 (35.0)
  • Page 90 17.1.1.2 Two Indoor Unit Operation  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz A) Indoor unit capacity: Cooling (3.2 + 2.5: CS-E12RKUAW + CS-E9RKUAW), service mode frequency = 42Hz E9RKUAW E12RKUAW 62.0 (16.6)
  • Page 91  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz A) Indoor unit capacity: Heating (3.2 + 2.5: CS-E12RKUAW + CS-E9RKUAW), service mode frequency = 75Hz E9RKUAW E12RKUAW 105.0 (40.5)
  • Page 92 17.1.1.3 Three Indoor Unit Operation  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz A) Indoor unit capacity: Cooling (3.2 + 2.5 + 2.0: CS-E12RKUAW + CS-E9RKUAW + CS-ME7RKUA), service mode frequency = 49Hz ME7RKUA E9RKUAW...
  • Page 93  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz A) Indoor unit capacity: Heating (3.2 + 2.5 + 2.0: CS-E12RKUAW + CS-E9RKUAW + CS-ME7RKUA), service mode frequency = 75Hz ME7RKUA E9RKUAW E12RKUAW...
  • Page 94 17.1.2 Capacity Table 17.1.2.1 Cooling Cooling: 60Hz, 230V Maximum capacity and Input power Indoor Air Temp. °F (°C) WB Outdoor 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Air Temp. Total Input Total Input Total Input Total Input...
  • Page 95 Indoor Air Temp. °F (°C) WB Outdoor 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Air Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 96 Indoor Air Temp. °F (°C) WB Outdoor 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Air Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 97 Indoor Air Temp. °F (°C) WB Outdoor 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Air Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 98 Indoor Air Temp. °F (°C) WB Outdoor 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Air Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 99 Indoor Air Temp. °F (°C) WB Outdoor 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Air Temp. (Capacity) °F (°C) Total Input Total Input Total Input Total Input Total Input Total Input Capacity Power Capacity Power Capacity Power...
  • Page 100 Indoor Air Temp. °F (°C) WB Outdoor 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Air Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 101 Indoor Air Temp. °F (°C) WB Outdoor 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Air Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 102 17.1.2.2 Heating Heating: 60Hz, 230V Maximum capacity and Input power Outdoor Air Temp. °F (°C) WB Indoor Air 59.0 (15) 50.0 (10) 42.8 (6) 32.0 (0) 23.0 (-5) 14.0 (-10) 5.0 (-15) Combination Temp. Total Input Total Input Total Input Total Input Total...
  • Page 103 Outdoor Air Temp. °F (°C) WB Indoor Air 59.0 (15) 50.0 (10) 42.8 (6) 32.0 (0) 23.0 (-5) 14.0 (-10) 5.0 (-15) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity...
  • Page 104 Outdoor Air Temp. °F (°C) WB Indoor Air 59.0 (15) 50.0 (10) 42.8 (6) 32.0 (0) 23.0 (-5) 14.0 (-10) 5.0 (-15) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity...
  • Page 105 Outdoor Air Temp. °F (°C) WB Indoor Air 59.0 (15) 50.0 (10) 42.8 (6) 32.0 (0) 23.0 (-5) 14.0 (-10) 5.0 (-15) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity...
  • Page 106 Outdoor Air Temp. °F (°C) WB Indoor Air 59.0 (15) 50.0 (10) 42.8 (6) 32.0 (0) 23.0 (-5) 14.0 (-10) 5.0 (-15) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity...
  • Page 107 Outdoor Air Temp. °F (°C) WB Indoor Air 59.0 (15) 50.0 (10) 42.8 (6) 32.0 (0) 23.0 (-5) 14.0 (-10) 5.0 (-15) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity...

  • Page 108: Cu-4E24Rbu

    17.2 CU-4E24RBU 17.2.1 Operation Characteristics 17.2.1.1 One Indoor Unit Operation  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz A) Indoor unit capacity: Cooling (2.0: CS-ME7RKUA), service mode frequency = 20Hz ME7RKUA 64.0 (17.7)
  • Page 109  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz B) Indoor unit capacity: Cooling (2.5: CS-E9RKUAW), service mode frequency = 20Hz E9RKUAW 64.0 (17.7) 63.0 (17.2) 62.0 (16.6) 61.0 (16.1) 60.0 (15.5)
  • Page 110  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz C) Indoor unit capacity: Cooling (3.2: CS-E12RKUAW), service mode frequency = 34Hz E12RKUAW 60.0 (15.5) 59.0 (15.0) 58.0 (14.4) 57.0 (13.8) 56.0 (13.3)
  • Page 111  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz D) Indoor unit capacity: Cooling (5.0: CS-E18RKUAW), service mode frequency = 49Hz E18RKUAW 61.0 (16.1) 60.0 (15.5) 59.0 (15.0) 58.0 (14.4) 57.0 (13.8)
  • Page 112  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz A) Indoor unit capacity: Heating (2.0: CS-ME7RKUA), service mode frequency = 39Hz ME7RKUA 115.0 (46.1) 110.0 (43.3) 105.0 (40.5) 100.0 (37.7) 95.0 (35.0)
  • Page 113  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz B) Indoor unit capacity: Heating (2.5: CS-E9RKUAW), service mode frequency = 39Hz E9RKUAW 115.0 (46.1) 110.0 (43.3) 105.0 (40.5) 100.0 (37.7) 95.0 (35.0)
  • Page 114  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz C) Indoor unit capacity: Heating (3.2: CS-E12RKUAW), service mode frequency = 47Hz E12RKUAW 115.0 (46.1) 110.0 (43.3) 105.0 (40.5) 100.0 (37.7) 95.0 (35.0)
  • Page 115  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz D) Indoor unit capacity: Heating (5.0: CS-E18RKUAW), service mode frequency = 55Hz E18RKUAW 115.0 (46.1) 110.0 (43.3) 105.0 (40.5) 100.0 (37.7) 95.0 (35.0)
  • Page 116 17.2.1.2 Two Indoor Unit Operation  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz A) Indoor unit capacity: Cooling (2.0 + 2.5: CS-ME7RKUA + CS-E9RKUAW), service mode frequency = 49Hz ME7RKUA E9RKUAW 62.0 (16.6)
  • Page 117  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz B) Indoor unit capacity: Cooling (2.0 + 3.2: CS-ME7RKUA + CS-E12RKUAW), service mode frequency = 49Hz ME7RKUA E12RKUAW 62.0 (16.6)
  • Page 118  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz C) Indoor unit capacity: Cooling (2.0 + 5.0: CS-ME7RKUA + CS-E18RKUAW), service mode frequency = 51Hz ME7RKUA E18RKUAW 64.0 (17.7)
  • Page 119  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz D) Indoor unit capacity: Cooling (2.5 + 3.2: CS-E9RKUAW + CS-E12RKUAW), service mode frequency = 49Hz E9RKUAW E12RKUAW 62.0 (16.6)
  • Page 120  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz E) Indoor unit capacity: Cooling (2.5 + 5.0: CS-E9RKUAW + CS-E18RKUAW), service mode frequency = 51Hz E9RKUAW E18RKUAW 65.0 (18.3)
  • Page 121  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz F) Indoor unit capacity: Cooling (3.2 + 5.0: CS-E12RKUAW + CS-E18RKUAW), service mode frequency = 53Hz E12RKUAW E18RKUAW 64.0 (17.7)
  • Page 122  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz A) Indoor unit capacity: Heating (2.0 + 2.5: CS-ME7RKUA + CS-E9RKUAW), service mode frequency = 58Hz ME7RKUA E9RKUAW 110.0 (43.3)
  • Page 123  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz B) Indoor unit capacity: Heating (2.0 + 3.2: CS-ME7RKUA + CS-E12RKUAW), service mode frequency = 64Hz ME7RKUA E12RKUAW 110.0 (43.3)
  • Page 124  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz C) Indoor unit capacity: Heating (2.0 + 5.0: CS-ME7RKUA + CS-E18RKUAW), service mode frequency = 68Hz ME7RKUA E18RKUAW 110.0 (43.3)
  • Page 125  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz D) Indoor unit capacity: Heating (2.5 + 3.2: CS-E9RKUAW + CS-E12RKUAW), service mode frequency = 64Hz E9RKUAW E12RKUAW 110.0 (43.3)
  • Page 126  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz E) Indoor unit capacity: Heating (2.5 + 5.0: CS-E9RKUAW + CS-E18RKUAW), service mode frequency = 68Hz E9RKUAW E18RKUAW 110.0 (43.3)
  • Page 127  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz F) Indoor unit capacity: Heating (3.2 + 5.0: CS-E12RKUAW + CS-E18RKUAW), service mode frequency = 73Hz E12RKUAW E18RKUAW 110.0 (43.3)
  • Page 128 17.2.1.3 Three Indoor Unit Operation  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz A) Indoor unit capacity: Cooling (2.0 + 2.5 + 3.2: CS-ME7RKUA + CS-E9RKUAW + CS-E12RKUAW), service mode frequency = 55Hz ME7RKUA E9RKUAW...
  • Page 129  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz B) Indoor unit capacity: Cooling (2.0 + 2.5 + 5.0: CS-ME7RKUA + CS-E9RKUAW + CS-E18RKUAW), service mode frequency = 57Hz ME7RKUA E9RKUAW E18RKUAW...
  • Page 130  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz C) Indoor unit capacity: Cooling (2.0 + 3.2 + 5.0: CS-ME7RKUA + CS-E12RKUAW + CS-E18RKUAW), service mode frequency = 59Hz ME7RKUA E12RKUAW E18RKUAW...
  • Page 131  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz D) Indoor unit capacity: Cooling (2.5 + 3.2 + 5.0: CS-E9RKUAW + CS-E12RKUAW + CS-E18RKUAW), service mode frequency = 59Hz E9RKUAW E12RKUAW E18RKUAW...
  • Page 132  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz A) Indoor unit capacity: Heating (2.0 + 2.5 + 3.2: CS-ME7RKUA + CS-E9RKUAW + CS-E12RKUAW), service mode frequency = 77Hz ME7RKUA E9RKUAW E12RKUAW...
  • Page 133  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz B) Indoor unit capacity: Heating (2.0 + 2.5 + 5.0: CS-ME7RKUA + CS-E9RKUAW + CS-E18RKUAW), service mode frequency = 77Hz ME7RKUA E9RKUAW E18RKUAW...
  • Page 134  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz C) Indoor unit capacity: Heating (2.0 + 3.2 + 5.0: CS-ME7RKUA + CS-E12RKUAW + CS-E18RKUAW), service mode frequency = 82Hz ME7RKUA E12RKUAW E18RKUAW...
  • Page 135  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz D) Indoor unit capacity: Heating (2.5 + 3.2 + 5.0: CS-E9RKUAW + CS-E12RKUAW + CS-E18RKUAW), service mode frequency = 82Hz E9RKUAW E12RKUAW E18RKUAW...
  • Page 136 17.2.1.4 Four Indoor Unit Operation  Cooling Characteristic [Condition] Room temperature: 80.0°F (26.7°C) (DBT), 67.0°F (19.4°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz A) Indoor unit capacity: Cooling (2.0 + 2.5 + 3.2 + 5.0: CS-ME7RKUA + CS-E9RKUAW + CS-E12RKUAW + CS-E18RKUAW), service mode frequency = 65Hz ME7RKUA E9RKUAW...
  • Page 137  Heating Characteristic [Condition] Room temperature: 70.0°F (21.1°C) (DBT), 60.0°F (15.6°C) (WBT) Operation condition: High fan speed Piping Length: 7.5m (24.6 ft) 230V 60Hz A) Indoor unit capacity: Heating (2.0 + 2.5 + 3.2 + 5.0: CS-ME7RKUA + CS-E9RKUAW + CS-E12RKUAW + CS-E18RKUAW), service mode frequency = 86Hz ME7RKUA E9RKUAW...
  • Page 138 17.2.2 Capacity Table 17.2.2.1 Cooling Cooling: 60Hz, 230V Maximum capacity and Input power Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input...
  • Page 139 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 140 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 141 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 142 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 143 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 144 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 145 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 146 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 147 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 148 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. (Capacity) °F (°C) Total Input Total Input Total Input Total Input Total Input Total Input Capacity Power Capacity Power Capacity Power...
  • Page 149 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 150 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 151 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 152 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 153 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 154 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 155 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 156 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 157 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 158 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 159 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 160 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 161 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 162 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 163 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 164 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 165 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 166 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 167 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 168 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 169 Indoor Air Temp. °F (°C) WB Outdoor Air 60.8 (16) 63.5 (17.5) 64.4 (18) 66.2 (19) 71.6 (22) 75.2 (24) Combination Temp. Total Input Total Input Total Input Total Input Total Input Total Input (Capacity) °F (°C) Capacity Power Capacity Power Capacity Power...
  • Page 170 17.2.2.2 Heating Heating: 60Hz, 230V Maximum capacity and Input power Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp.
  • Page 171 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 172 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 173 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 174 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 175 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 176 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 177 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 178 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 179 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 180 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 181 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 182 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 183 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 184 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 185 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 186 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 187 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 188 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 189 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...
  • Page 190 Outdoor Air Temp. °F (°C) WB Indoor 60.8 (16) 59.0 (15) 50.0 (10) 44.6 (7) 42.8 (6) 35.6 (2) 32.0 (0) 23.0 (-5) 19.4 (-7) 14.0 (-10) 5.0 (-15) Combination Temp. (Capacity) Total Input Total Input Total Input Total Input Total Input Total...

  • Page 191: Exploded View And Replacement Parts List

    18. Exploded View and Replacement Parts List 18.1 CU-3E19RBU 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 192 SAFETY REF. NO. DESCRIPTION & NAME QTY. CU-3E19RBU REMARK CHASSIS ASSY CWD52K1239A SOUND PROOF BOARD CWH151230 FAN MOTOR BRACKET CWD541127 SCREW-BRACKET FAN MOTOR CWH551217 CONDENSER COMPLETE CWB32C4269 FAN MOTOR EHDS80CAC SCREW-FAN MOTOR MOUNT CWH551323 PROPELLER FAN ASSY CWH00K1006 NUT - PROPELLER FAN CWH561092 COMPRESSOR 5KD184XAB21...
  • Page 193 SAFETY REF. NO. DESCRIPTION & NAME QTY. CU-3E19RBU REMARK CABINET TOP PLATE CWE031131A CONTROL BOARD COVER CO. CWH13C1209 CABINET FRONT PLATE ASSY CWE06K1071 CABINET SIDE PLATE (L) CWE041490A CABINET SIDE PLATE CWE041499A WIRE NET CWD041128A HANDLE CWE161010 TERMINAL COVER CWH171035 NUT-TERMINAL COVER CWH7080300J INSTALLATION INSTRUCTION...

  • Page 194: Cu-4E24Rbu

    18.2 CU-4E24RBU 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 195 SAFETY REF.NO. DESCRIPTION & NAME QTY. CU-4E24RBU REMARK CHASSIS ASS'Y CWD52K1364A SOUND-PROOF BOARD CWH151367 FAN MOTOR BRACKET CWD54K1081 SCREW-BRACKET FAN MOTOR CWH551217 CONDENSER COMPLETE CWB32C3961 FAN MOTOR L6CBYYYL0116 SCREW-FAN MOTOR MOUNT CWH551323 PROPELLER FAN ASSY CWH03K1075 CWH561092 COMPRESSOR 5KD240XAL21 BUSHING - COMPRESSOR MOUNT...
  • Page 196 SAFETY REF.NO. DESCRIPTION & NAME QTY. CU-4E24RBU REMARK CABINET FRONT PLATE-COMPLETE CWE06C1510 CABINET SIDE PLATE CWE041792A CABINET FRONT PLATE-COMPLETE CWE06C1511 WIRE NET CWD041203A HANDLE CWE161021 TERMINAL COVER CWH171039A NUT - TERMINAL COVER CWH7080300J INSTALLATION INSTRUCTION CWF616781 INSTALLATION INSTRUCTION CWF616782 ACCESSORY CO. (DRAIN ELBOW)

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