Panasonic CU-4KE24NBU, CU-3KE19NBU service manual Connecting indoor unit for CU-4KE31NBU

Panasonic CU-4KE31NBU, CU-4KE24NBU, CU-3KE19NBU Case Refrigerant is Leaking, Welding leaking points, Recharging Panasonic CU-4KE24NBU Charging Additional Refrigerant, Retro-Fitting Existing Systems, When Tubes are Extended Panasonic CU-3KE19NBU, CU-4KE31NBU, CU-4KE24NBU service manual Panasonic CU-4KE31NBU, CU-4KE24NBU, CU-3KE19NBU service manual 852-6-4190-584-00-2 Panasonic CU-4KE24NBU, CU-4KE31NBU, CU-3KE19NBU service manual For Outdoor Unit, Contents Panasonic CU-3KE19NBU, CU-4KE31NBU, CU-4KE24NBU service manual Please Read Before Starting Panasonic CU-4KE31NBU Fins of the outdoor unit. You may get injured, ‡ 8VHWKHIODUHPHWKRGIRUFRQQHFWLQJWXELQJ Panasonic CU-4KE24NBU, CU-4KE31NBU, CU-3KE19NBU service manual General Panasonic CU-3KE19NBU Installation Site Selection, Indoor Unit, For wall-mounted units, For ceiling-mounted cassette units Panasonic CU-4KE31NBU, CU-4KE24NBU, CU-3KE19NBU service manual H1, H2, H3, H4 Panasonic CU-4KE24NBU, CU-4KE31NBU service manual Connecting Indoor Units, Connecting indoor unit for CU-3KE19NBU Panasonic CU-3KE19NBU, CU-4KE31NBU, CU-4KE24NBU service manual 815.88mm Locally purchased Panasonic CU-4KE24NBU, CU-3KE19NBU service manual Connecting indoor unit for CU-4KE31NBU Panasonic CU-4KE24NBU, CU-4KE31NBU, CU-3KE19NBU service manual CS-MKE24NKU Panasonic CU-3KE19NBU, CU-4KE31NBU Baffle Plate for the Outdoor Unit, It is recommended to use baffle plates, Front, Back Panasonic CU-4KE31NBU, CU-4KE24NBU, CU-3KE19NBU service manual Air Intake Baffle, Air Discharge Baffle Panasonic CU-4KE24NBU, CU-4KE31NBU, CU-3KE19NBU service manual Precautions for installation Panasonic CU-3KE19NBU service manual Outer Dimensions of Outdoor Unit, CU-4KE24NBU, CU-4KE31NBU Panasonic CU-4KE31NBU, CU-4KE24NBU Diagram of Outdoor Unit Installation, Never install only a single indoor unit Panasonic CU-4KE24NBU, CU-4KE31NBU Installation Process, Use of the Flaring Method, Flaring Procedure with a Flare Tool Panasonic CU-3KE19NBU, CU-4KE31NBU, CU-4KE24NBU Tubing Connections, To 0.5 mm Adjust so that the amount of tube Panasonic CU-4KE31NBU Insulation of Refrigerant Tubing, To prevent heat loss and wet floors due to dripping of con Panasonic CU-4KE24NBU, CU-4KE31NBU Air Purging with a Vacuum Pump for Test Run, Finishing the Installation Panasonic CU-3KE19NBU Adapter manual, and use the adapter correctly, External diameter of service port R410A 5/16 Panasonic CU-4KE31NBU, CU-4KE24NBU Pump Down, What is pump-down?, Pump-down procedure, If pump-down is not possible Panasonic CU-4KE24NBU Wiring Instructions, General Precautions on Wiring, Recommended Wire Length and Diameter Panasonic CU-3KE19NBU, CU-4KE31NBU, CU-4KE24NBU service manual Disconnect switch may be required by national or local codes Panasonic CU-4KE31NBU, CU-4KE24NBU How to connect wiring to the terminal, For Indoor Unit, For stranded wiring Panasonic CU-4KE24NBU, CU-4KE31NBU Wiring Instructions for the Outdoor Unit, Indoor unit D, Indoor unit B, Indoor unit C Panasonic CU-3KE19NBU, CU-4KE31NBU, CU-4KE24NBU service manual Test Run, Performing a test run, Checking tubing and wiring Panasonic CU-4KE31NBU, CU-4KE24NBU, CU-3KE19NBU service manual Connecting a Home Automation Device, Installation Check Sheet Panasonic CU-4KE24NBU, CU-4KE31NBU, CU-3KE19NBU service manual DC1111-0
Page 105

(3)Connecting indoor unit for CU-4KE31NBU

(A)

 

(1/2"(12.70mm)

 

3/8"(9.52mm)) Supplied Reducer

 

Flare 1/2"(12.70mm)

Union 3/8"(9.52mm)

 

Outdoor unit

 

 

Indoor unit

 

D

 

3/8"(9.52mm)

 

 

 

(CS-MKE7NKU,CS-MKE9NKU,CS-MKE12NKU)

1/2"(12.70mm)

1/4"(6.35mm)

(CS-MKE9NB4U,CS-MKE12NB4U)

 

 

3/8"(9.52mm)

 

C

 

 

 

 

 

(CS-MKE7NKU,CS-MKE9NKU,CS-MKE12NKU)

1/2"(12.70mm)

1/4"(6.35mm)

 

 

(CS-MKE9NB4U,CS-MKE12NB4U)

 

3/8"(9.52mm)

 

 

 

B

 

 

 

 

(CS-MKE7NKU,CS-MKE9NKU,CS-MKE12NKU)

3/8"(9.52mm)

1/4"(6.35mm)

 

 

(CS-MKE9NB4U,CS-MKE12NB4U)

 

3/8"(9.52mm)

 

 

 

A

 

 

 

 

(CS-MKE7NKU,CS-MKE9NKU,CS-MKE12NKU)

3/8"(9.52mm)

1/4"(6.35mm)

 

 

(CS-MKE9NB4U,CS-MKE12NB4U)

 

 

 

 

 

 

 

 

 

 

 

Fig. 4g

(B)

 

 

 

 

 

(1/2"(12.70mm

 

3/8"(9.52mm)) Supplied Reducer

 

Flare 1/2"(12.70mm)

Union 3/8"(9.52mm)

 

Outdoor unit

 

 

Indoor unit

 

D

 

1/2"(12.70mm)

 

 

 

(CS-MKE18NKU)

1/2"(12.70mm)

1/4"(6.35mm)

 

(CS-KE18NB4UW)

3/8"(9.52mm)

 

 

C

 

 

(CS-MKE7NKU,CS-MKE9NKU,CS-MKE12NKU)

1/2"(12.70mm)

1/4"(6.35mm)

 

 

(CS-MKE9NB4U,CS-MKE12NB4U)

 

3/8"(9.52mm)

 

 

 

B

 

 

 

 

(CS-MKE7NKU,CS-MKE9NKU,CS-MKE12NKU)

3/8"(9.52mm)

1/4"(6.35mm)

 

 

(CS-MKE9NB4U,CS-MKE12NB4U)

 

3/8"(9.52mm)

 

 

 

A

 

 

 

 

(CS-MKE7NKU,CS-MKE9NKU,CS-MKE12NKU)

3/8"(9.52mm)

1/4"(6.35mm)

 

 

(CS-MKE9NB4U,CS-MKE12NB4U)

 

 

 

 

 

 

 

Fig. 4h

(C)

Outdoor unit

 

Indoor unit

D

 

 

 

 

 

1/2"(12.70mm)

 

(CS-MKE18NKU)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1/2"(12.70mm)

 

 

 

 

 

 

 

 

(CS-KE18NB4UW)

 

 

 

 

 

 

 

 

C

 

 

 

 

1/4"(6.35mm)

1/2"(12.70mm)

 

(CS-MKE18NKU)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1/2"(12.70mm)

 

 

 

 

 

 

 

 

(CS-KE18NB4UW)

 

 

 

 

 

 

 

 

B

 

 

 

 

1/4"(6.35mm)

3/8"(9.52mm)

 

 

(CS-MKE7NKU,CS-MKE9NKU,CS-MKE12NKU)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3/8"(9.52mm)

 

 

 

 

 

 

 

 

(CS-MKE9NB4U,CS-MKE12NB4U)

 

 

 

 

 

 

 

 

 

 

 

 

1/4"(6.35mm)

3/8"(9.52mm)

 

 

 

A

 

 

 

 

 

 

(CS-MKE7NKU,CS-MKE9NKU,CS-MKE12NKU)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3/8"(9.52mm)

 

 

 

 

 

 

 

 

(CS-MKE9NB4U,CS-MKE12NB4U)

 

 

 

 

 

 

 

 

 

 

 

 

1/4"(6.35mm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 4i

9

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Contents DC Inverter MULTI-SYSTEM AIR Conditioner Safety Precautions Prohibit Table of Contents Appendix a Semi-Concealed Type Wall Mounted TypeOperating Range Outdoor Unit CU-3KE19NBU Unit SpecificationsIndoor Unit CS-MKE9NKU × Duct Less Type Rated 230VIndoor Unit Outdoor Unit208V CU-4KE24NBU Running Amperes 10.1 Running Amperes 10.0 11.1 CU-4KE31NBU Running Amperes 12.3 10.3 Running Amperes 12.7 11.4 Outdoor Unit Major Component SpecificationsOutdoor Unit CU-4KE24NBU Outdoor Unit CU-4KE31NBU CU-3KE19NBU CU-4KE24NBU CU-4KE31NBU Other Component SpecificationsDimensional Data Unit inchmm 852-0-0010-20400-0 Unit inchmm 852-0-0010-20300-0 Refrigerant Flow Diagram Insulation of Refrigerant TubingIndoor unit Outdoor unit Valve Narrow tube Curve because it can cause the tube to break or crack Temperature Charts Temperature Charts CU-3KE19NBUIndoor Unit CS-MKE7NKU × F21 Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE12NKU × Heating CharacteristicsIndoor Unit CS-MKE18NKU × Indoor Unit CS-MKE9NB4U × Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE12NB4U × Indoor Unit CS-KE12NB4UW × Temperature Charts CU-4KE24NBU 188 Lo fan Hi fan HH fan Outdoor Unit CU-4KE24NBU Indoor Unit CS-MKE12NKU × Indoor Unit CS-MKE18NKU × Indoor Unit CS-MKE24NKU × 23C 73F Current 21C Temp 70F 17C Air Indoor 63F Outdoor Unit CU-4KE24NBU Indoor Unit CS-MKE12NB4U × Indoor Unit CS-KE12NB4UW × Temperature Charts CU-4KE31NBU Wide 362 Pressure 290 High 218 Outdoor air temperature F C 73F 23C Temp Indoor 73F 23C Air Temp 86F 30C Temp Air Indoor 63F Wide 362 Current Indoor Outdoor Cooling CapacityCS-MKE12NB4U × Power Supply 230V Single Phase 60Hz Cooling CapacityCS-MKE9NKU × CS-KE18NB4UW + CS-MKE12NB4U + CS-MKE12NB4U 30,600 BTU/h CS-MKE9NB4U × Cooling Capacity Low Ambient TC Total Cooling Capacity BTU/h ENT. TEMP. o F o C Ambient TEMP. o F o C 12.8 23,390 23,310 18,570 22,160 24,260 30,760 22,560 28,790 22,730 TH Total Heating Capacity BTU/h Heating CapacityPower Supply 230V Single Phase 60Hz Heating Capacity 29,200 BTU/h 28,400 BTU/h 32,000 BTU/h 000 CFM Outdoor Unit CU-3KE19NBU 8FA2-5251-11700-1 Electric Wiring DiagramsOutdoor Unit CU-4KE24NBU 8FA2-5251-11500-1 Outdoor Unit CU-4KE31NBU 8FA2-5251-11300-1 Explanation of Functions FunctionsStop Cool Frequency control Fluctuation fanFluctuation fan Low Ambient Cooling Operation Protective Functions Clean defrostDefrost Detection and Release Non-stop defrostingDescription of function Current ControlAutomatic frequency control Current controlReset conditions Compressor Temperature ControlLow Start Current Control at Heat Start-upPrecautions before Performing Inspection or Repair Troubleshooting Before Calling for ServiceTrouble Diagnosis by Error Monitor Lamps Location of the Error Monitor LampsDisplay of the Error Monitor Lamps Checking the Outdoor System Work procedure Check items unit operationChecking the outdoor unit Checking the defrost operationTrouble Diagnosis of Each Part Problems of Each Part and Inspection PointsInspection Points for Each Part CU-3KE19NBU MV0 MV1 MV2 CU-4KE24NBU CU-4KE31NBU Electric expansion valveBranch tubing temperature sensor BreakerRefrigerant gas pressure Diagnostic results Diagnostic procedureRemedy for symptom 3 to Trouble Diagnosis of Fan MotorWhat is New Refrigerant R410A? Characteristics of New Refrigerant R410ACharacteristics Components mixing proportionsChecklist before Servicing Tools Specifically for R410A Tubing Installation ProceduresCase of Compressor Malfunction Procedure for Replacing CompressorExample Amount in the charging cylinder is less than 20%To prevent the composition R410A from changingCase Refrigerant is Leaking Welding leaking pointsRecharging Charging Additional Refrigerant When Tubes are ExtendedRetro-Fitting Existing Systems Use of Existing UnitsPage 852-6-4190-584-00-2 For Outdoor Unit ContentsPlease Read Before Starting ‡ 8VHWKHIODUHPHWKRGIRUFRQQHFWLQJWXELQJ Fins of the outdoor unit. You may get injuredGeneral Indoor Unit Installation Site SelectionFor wall-mounted units For ceiling-mounted cassette unitsH1, H2, H3, H4 Connecting Indoor Units Connecting indoor unit for CU-3KE19NBUConnecting indoor unit for CU-4KE24NBU 815.88mm Locally purchased Connecting indoor unit for CU-4KE31NBU CS-MKE24NKU It is recommended to use baffle plates Baffle Plate for the Outdoor UnitFront BackAir Discharge Baffle Air Intake BafflePrecautions for installation CU-3KE19NBU Outer Dimensions of Outdoor UnitCU-4KE24NBU CU-4KE31NBUNever install only a single indoor unit Diagram of Outdoor Unit InstallationInstallation Process Flaring Procedure with a Flare ToolUse of the Flaring Method Tubing Connections To 0.5 mm Adjust so that the amount of tubeTo prevent heat loss and wet floors due to dripping of con Insulation of Refrigerant Tubing For wall-mounted units  For ceiling-mounted cassette unitsFinishing the Installation Air Purging Air Purging with a Vacuum Pump for Test Run Adapter manual, and use the adapter correctly External diameter of service port R410A 5/16Pump-down procedure What is pump-down? Pump Down If pump-down is not possibleWiring Instructions General Precautions on WiringRecommended Wire Length and Diameter Disconnect switch may be required by national or local codes For Outdoor Unit  For solid core wiring or F-cable How to connect wiring to the terminal For stranded wiring For Indoor UnitIndoor unit D Wiring Instructions for the Outdoor UnitIndoor unit B Indoor unit CChecking tubing and wiring Test RunPerforming a test run Installation Check Sheet Connecting a Home Automation DeviceDC1111-0
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CU-3KE19NBU, CU-4KE24NBU, CU-4KE31NBU specifications

The Panasonic CU-4KE24NBU, CU-4KE31NBU, and CU-3KE19NBU are high-efficiency air conditioning units that represent Panasonic's commitment to innovative climate control solutions. These models integrate advanced technologies to deliver superior performance, energy savings, and user comfort, making them ideal for both residential and commercial applications.

The CU-4KE24NBU, a part of the ECOi series, is designed for medium-sized spaces. It boasts an impressive cooling capacity, ensuring optimal temperature regulation. Its inverter technology adjusts the compressor speed according to the needs of the environment, resulting in reduced energy consumption and consistent comfort levels. The unit operates quietly, making it suitable for bedrooms, offices, or other noise-sensitive environments. Additionally, it features a robust air filtration system that improves indoor air quality by removing dust and allergens.

The CU-4KE31NBU offers a slightly higher capacity, making it perfect for larger areas. Like its counterpart, it utilizes inverter technology, which not only enhances energy efficiency but also minimizes wear and tear on the components, leading to a longer lifespan. Its multi-split capability allows for the connection of multiple indoor units to a single outdoor unit, providing flexibility in installation. The CU-4KE31NBU also integrates smart technology that allows users to control the system remotely via smartphones, giving them greater convenience and control over their environment.

For applications requiring a more compact option, the CU-3KE19NBU is an excellent choice. This model balances size and power, offering a competitive cooling capacity that can easily service small to medium-sized rooms. The unit is designed for easy installation and maintenance, featuring a lightweight construction that simplifies handling by technicians. The efficient inverter technology ensures that users benefit from lower energy bills while maintaining a consistent indoor climate.

All three models are equipped with Panasonic’s advanced refrigerants, which contribute to their eco-friendly performance. These refrigerants help reduce greenhouse gas emissions while maintaining high efficiency. Moreover, the units come with built-in diagnostic capabilities, allowing for quick detection of any issues, thus ensuring that the systems operate at peak efficiency throughout their lifespan.

In summary, the Panasonic CU-4KE24NBU, CU-4KE31NBU, and CU-3KE19NBU are exemplary air conditioning solutions that combine cutting-edge technology with user-friendly features, ensuring that they meet the varying needs of today's consumers while promoting energy efficiency and sustainability.
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