Panasonic CU-4KE31NBU, CU-4KE24NBU, CU-3KE19NBU service manual 32,000 BTU/h

Page 66

Outdoor Unit

: CU-4KE31NBU

 

 

 

 

 

 

 

 

 

Indoor Unit

: CS-MKE9NKU × 4

 

 

 

 

 

 

 

Power Supply : 230V Single Phase 60Hz

 

 

 

 

 

 

 

 

< Heating Capacity >

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RATING CAPACITY:

32,000 BTU/h

 

AIR FLOW RATE:

1,130 CFM

 

 

OUTDOOR

 

 

 

 

 

INDOOR

 

 

 

ENT. TEMP. o F (o C)

 

 

 

 

AMBIENT TEMP. o F (o C)

 

 

 

 

 

WB

 

 

 

60

65

 

70

75

80

 

 

 

 

 

 

 

(15.6)

(18.3)

 

(21.1)

(23.9)

(26.7)

 

 

0

(-17.8)

 

TH

 

17,980

17,970

 

17,950

17,910

17,870

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

(-16.1)

 

TH

 

18,570

18,560

 

18,540

18,510

18,460

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

(-13.3)

 

TH

 

19,990

19,980

 

19,950

19,920

19,870

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13

(-10.6)

 

TH

 

21,450

21,440

 

21,420

21,380

21,330

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18

(-7.8)

 

TH

 

23,060

23,050

 

23,030

22,990

22,940

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

23

(-5.0)

 

TH

 

24,760

24,750

 

24,720

24,680

24,620

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

28

(-2.2)

 

TH

 

26,520

26,510

 

26,480

26,430

26,370

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

33

(0.6)

 

TH

 

28,340

28,330

 

28,300

28,250

28,180

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

38

(3.3)

 

TH

 

30,140

30,130

 

30,100

30,040

29,970

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

43

(6.1)

 

TH

 

32,050

32,040

 

#

32,000

31,940

31,870

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

48

(8.9)

 

TH

 

33,990

33,970

 

33,930

33,870

33,790

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

53

(11.7)

 

TH

 

35,940

35,920

 

35,880

35,820

35,730

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

58

(14.4)

 

TH

 

37,820

37,800

 

37,760

37,690

37,600

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

63

(17.2)

 

TH

 

39,770

39,750

 

39,700

39,630

39,530

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

65

(18.3)

 

TH

 

40,520

40,500

 

40,460

40,380

40,290

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TH : Total Heating Capacity (BTU/h)

NOTE

1.Rating conditions (#) : Indoor Unit Entering Air Temp. 70 °F (21.1 °C) DB

:Outdoor Ambient Temp. 47 °F (8.3 °C) DB / 43 °F (6.1 °C) WB

2.Above data does not take Defrost Operation, Overload Prevention Protection, and/or Cold Air Prevention Protection during heating operation into account. For this reason, the value may vary from the actual heating characteristics.

3.Above data represents the value when the operation frequency of a compressor is fixed.

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Contents DC Inverter MULTI-SYSTEM AIR Conditioner Safety Precautions Prohibit Table of Contents Appendix a Wall Mounted Type Semi-Concealed TypeOperating Range Indoor Unit CS-MKE9NKU × Unit SpecificationsOutdoor Unit CU-3KE19NBU Duct Less Type Rated 230VOutdoor Unit Indoor 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 Major Component Specifications Outdoor UnitOutdoor Unit CU-4KE24NBU Outdoor Unit CU-4KE31NBU Other Component Specifications CU-3KE19NBU CU-4KE24NBU CU-4KE31NBUDimensional 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 Heating Characteristics Outdoor Unit CU-3KE19NBU Indoor Unit CS-MKE12NKU ×Indoor 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 Cooling Capacity Indoor OutdoorPower Supply 230V Single Phase 60Hz Cooling Capacity CS-MKE12NB4U ×CS-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 Heating Capacity TH Total Heating Capacity BTU/hPower Supply 230V Single Phase 60Hz Heating Capacity 29,200 BTU/h 28,400 BTU/h 32,000 BTU/h 000 CFM Electric Wiring Diagrams Outdoor Unit CU-3KE19NBU 8FA2-5251-11700-1Outdoor Unit CU-4KE24NBU 8FA2-5251-11500-1 Outdoor Unit CU-4KE31NBU 8FA2-5251-11300-1 Functions Explanation of FunctionsStop Cool Fluctuation fan Frequency controlFluctuation fan Low Ambient Cooling Operation Defrost Detection and Release Clean defrostProtective Functions Non-stop defrostingAutomatic frequency control Current ControlDescription of function Current controlLow Start Current Compressor Temperature ControlReset conditions Control at Heat Start-upTroubleshooting Before Calling for Service Precautions before Performing Inspection or RepairTrouble Diagnosis by Error Monitor Lamps Location of the Error Monitor LampsDisplay of the Error Monitor Lamps Checking the outdoor unit Work procedure Check items unit operationChecking the Outdoor System Checking the defrost operationProblems of Each Part and Inspection Points Trouble Diagnosis of Each PartInspection Points for Each Part Electric expansion valve CU-3KE19NBU MV0 MV1 MV2 CU-4KE24NBU CU-4KE31NBUBranch tubing temperature sensor BreakerRefrigerant gas pressure Remedy for symptom 3 to Diagnostic procedureDiagnostic results Trouble Diagnosis of Fan MotorCharacteristics Characteristics of New Refrigerant R410AWhat is New Refrigerant R410A? Components mixing proportionsChecklist before Servicing Tubing Installation Procedures Tools Specifically for R410AProcedure for Replacing Compressor Case of Compressor MalfunctionTo prevent the composition Amount in the charging cylinder is less than 20%Example R410A from changingCase Refrigerant is Leaking Welding leaking pointsRecharging Retro-Fitting Existing Systems When Tubes are ExtendedCharging Additional Refrigerant Use of Existing UnitsPage 852-6-4190-584-00-2 Contents For Outdoor UnitPlease Read Before Starting Fins of the outdoor unit. You may get injured ‡ 8VHWKHIODUHPHWKRGIRUFRQQHFWLQJWXELQJGeneral For wall-mounted units Installation Site SelectionIndoor Unit 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 Front Baffle Plate for the Outdoor UnitIt is recommended to use baffle plates BackAir Intake Baffle Air Discharge BafflePrecautions for installation CU-4KE24NBU Outer Dimensions of Outdoor UnitCU-3KE19NBU CU-4KE31NBUDiagram of Outdoor Unit Installation Never install only a single indoor unitInstallation Process Flaring Procedure with a Flare ToolUse of the Flaring Method To 0.5 mm Adjust so that the amount of tube Tubing Connections For wall-mounted units Insulation of Refrigerant TubingTo prevent heat loss and wet floors due to dripping of con  For ceiling-mounted cassette unitsFinishing the Installation Air Purging Air Purging with a Vacuum Pump for Test Run External diameter of service port R410A 5/16 Adapter manual, and use the adapter correctly Pump Down What is pump-down?Pump-down procedure 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 stranded wiring How to connect wiring to the terminalFor Outdoor Unit  For solid core wiring or F-cable For Indoor UnitIndoor unit B Wiring Instructions for the Outdoor UnitIndoor unit D Indoor unit CChecking tubing and wiring Test RunPerforming a test run Connecting a Home Automation Device Installation Check SheetDC1111-0
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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.