Panasonic CS-KE12NB41, CU-KE12NK1, CU-KE18NKU service manual CS-KE18NB4UW & CZ-18BT1U

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Indoor Unit

: CS-KE18NB4UW & CZ-18BT1U

 

 

 

 

 

 

 

Outdoor Unit

: CU-KE18NKU

 

 

 

 

 

 

 

 

 

Power Supply : 230V Single Phase 60Hz

 

 

 

 

 

 

 

 

 

< Cooling Capacity >

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RATING CAPACITY:

17,500 BTU/h

 

AIR FLOW RATE:

341 CFM

 

INDOOR

 

 

 

 

OUTDOOR

 

 

 

 

 

ENT. TEMP. oF (oC)

 

 

AMBIENT TEMP. oF (oC)

 

 

 

WB

 

DB

 

65

75

85

 

95

105

115

 

 

 

 

 

(18.3)

(23.9)

(29.4)

 

(35.0)

(40.6)

(46.1)

 

 

 

 

TC

12,260

12,550

12,830

 

13,060

13,460

9,520

 

 

72

(22.2)

SHC

9,140

9,270

9,400

 

9,540

9,740

7,810

 

59

76

(24.4)

SHC

10,330

10,470

10,600

 

10,730

10,930

9,010

 

(15.0)

80

(26.7)

SHC

11,590

11,720

11,860

 

11,990

12,190

9,520

 

 

84

(28.9)

SHC

12,260

12,550

12,830

 

13,060

13,380

9,520

 

 

88

(31.1)

SHC

12,260

12,550

12,830

 

13,060

13,460

9,520

 

 

 

 

TC

18,110

17,790

17,400

 

17,000

14,080

9,650

 

 

72

(22.2)

SHC

10,400

10,200

10,000

 

9,800

8,340

6,290

 

63

76

(24.4)

SHC

11,590

11,390

11,190

 

11,000

9,540

7,480

 

(17.2)

80

(26.7)

SHC

12,850

12,650

12,450

 

12,260

10,800

8,740

 

 

84

(28.9)

SHC

14,040

13,850

13,650

 

13,450

11,990

9,650

 

 

88

(31.1)

SHC

15,240

15,110

14,840

 

14,640

13,180

9,650

 

 

 

 

TC

18,510

18,220

17,860

 

#

17,500

14,220

9,750

 

 

72

(22.2)

SHC

8,680

8,480

8,340

 

8,140

6,620

4,830

 

67

76

(24.4)

SHC

9,870

9,740

9,540

 

9,340

7,880

6,020

 

(19.4)

80

(26.7)

SHC

11,130

10,930

10,800

 

10,600

9,070

7,280

 

 

84

(28.9)

SHC

12,320

12,190

11,990

 

11,790

10,330

8,480

 

 

88

(31.1)

SHC

13,510

13,380

13,180

 

12,980

11,530

9,670

 

 

 

 

TC

18,820

18,570

18,260

 

17,940

14,290

9,810

 

 

72

(22.2)

SHC

6,750

6,690

6,550

 

6,420

4,900

3,240

 

71

76

(24.4)

SHC

7,950

7,880

7,750

 

7,610

6,090

4,430

 

(21.7)

80

(26.7)

SHC

9,210

9,140

9,010

 

8,870

7,350

5,690

 

 

84

(28.9)

SHC

10,470

10,330

10,200

 

10,070

8,540

6,890

 

 

88

(31.1)

SHC

11,660

11,530

11,390

 

11,260

9,740

8,080

 

 

 

 

TC

19,010

18,800

18,530

 

18,260

14,280

9,810

 

75

76

(24.4)

SHC

6,160

6,090

5,960

 

5,890

4,430

2,970

 

(23.9)

80

(26.7)

SHC

7,420

7,350

7,220

 

7,150

5,690

4,230

 

 

84

(28.9)

SHC

8,610

8,540

8,410

 

8,340

6,890

5,430

 

 

88

(31.1)

SHC

9,800

9,740

9,670

 

9,540

8,080

6,620

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

1.Rating conditions (#) : Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB

:Outdoor Ambient Temp. 95 °F (35 °C) DB

2.Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

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

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Contents Outdoor Model No. Product Code No 852 361Safety Precautions Prohibit Table of Contents CS-KE12NB41 & CZ-18BT1U + CU-KE12NK1 CZ-RD515UTemperature Indoor Air Intake Temp Outdoor Air Intake Temp Operating RangeSpecifications Unit SpecificationsIndoor Unit CS-KE12NB41 & CZ-18BT1UDimensions & Weight Indoor Unit Dimensions & Weight Outdoor UnitCU-KE18NKU 230VCU-KE18NKU 208V CZ-KE18NB4UW & CZ-18BT1U Major Component Specifications Indoor UnitIndoor Unit Body CS-KE12NB41 Indoor Unit Panel CZ-18BT1UIndoor Unit Body CS-KE18NB4UW CB-CS-KE18NB4UOutdoor Unit Outdoor Unit CU-KE12NK1Compressor External FinishOutdoor Unit CU-KE18NKU Other Component Specifications Indoor Unit CS-KE12NB41 & CZ-18BT1UIndoor air temp sensor ModelKTEC-35-S98 Outdoor air temp sensorDimensional Data Unit inch mmUnit inch mm 852-0-0010-12700-0 Unit inch mm 852-0-0010-13200-0 Refrigerant Flow Diagram Refrigerant Flow DiagramOutdoor unit Outdoor unit Performance Data Temperature ChartsIndoor Unit CS-KE12NB41 & CZ-18BT1U Outdoor Unit CU-KE12NK1 High pressure performance chart Indoor Unit CS-KE18NB4UW & CZ-18BT1U Outdoor Unit CU-KE18NKU At wide Pressure Cooling Capacity Power Supply 115V Single Phase 60Hz Cooling CapacityCU-KE12NK1 Power Supply 230V Single Phase 60Hz Cooling Capacity CS-KE18NB4UW & CZ-18BT1UCooling Capacity Low Ambient 740 11,860 800 24.4 Heating Capacity Power Supply 115V Single Phase 60Hz Heating CapacityTH Total Heating Capacity BTU/h Power Supply 230V Single Phase 60Hz Heating Capacity Electrical Characteristics Electrical DataCooling HeatingVoltage230V Cooling Voltage208V Cooling18BT1U CS-KE12NB418FA2-5250-46900-2 Outdoor Unit CU-KE12NK1 8FA2-5251-12200-2 Controller Maintenance Address Setting of the Remote ControllerHow to Disconnect How to ConnectDisconnect the connectors in the control box Disassembly ProcedureRemove the air intake grill Remove the ceiling panel Remove the indoor air temperature sensor Remove the power box and control boxScrew Ground cable CN07 CN03 CN09 CN06 Remove the main body lower section Remove the drain pump and float switch Remove the heat exchanger sensorRemove the turbo fan and fan motor Remove the heat exchangerFunctions Operation FunctionsEmergency operation Auto cooling/heating operationTimer backup Lamp colorsCompressor discharge temperature control Protective FunctionsOverload prevention during heating Freeze preventionCT Peak current cut-off control Defrost detection and releaseReverse-Cycle Defrosting Precautions before Performing Inspection or Repair Troubleshooting Before Calling for ServiceMethod of Self-Diagnostics Self-diagnostics Lamps Indoor UnitUsing the TEST/T-RUN terminals Checking the Indoor and Outdoor UnitsReplace the controller Replace the circuit board or the fuseSerial Communication Error Identification Procedure Off Blinking IlluminatedBefore the Operation Condition E01From the previous page a Condition E12 Trouble Diagnosis of Fan Motor Indoor Fan MotorOutdoor Fan Motor Noise Malfunction and Electromagnetic Interference Noise malfunctionElectromagnetic interference Locations most susceptible to noise Trouble CorrectionPower Supply Cord Checking Electrical ComponentsMeasurement of Insulation Resistance Measurement of Insulation Resistance for Electrical PartsChecking Continuity of Fuse on PCB Assy Refrigerant R410A Special Precautions When Servicing Unit Characteristics of New Refrigerant R410AWhat is New Refrigerant R410A? CharacteristicsChecklist before Servicing Tubing Installation Procedures Tools Specifically for R410AProcedure for Replacing Compressor Case of Compressor MalfunctionConfiguration and characteristics of cylinders Amount in the charging cylinder is less than 20%Example To prevent the compositionWelding leaking points Case Refrigerant is LeakingRecharging When Tubes are Extended Charging Additional RefrigerantRetro-Fitting Existing Systems Use of Existing Units
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CZ-18BT1U, CS-KE12NB41, CS-KE18NB4UW, CU-KE18NKU, CU-KE12NK1 specifications

The Panasonic CS-KE18NB4UW and CU-KE12NK1, along with the CS-KE12NB41, CZ-18BT1U, and CU-KE18NKU, represent a suite of advanced air conditioning solutions built with cutting-edge technologies designed to provide optimal comfort, energy efficiency, and air quality in various settings.

One of the standout features of this lineup is the inverter technology. Inverter air conditioners adjust the compressor speed to maintain the desired temperature efficiently. This leads to significant energy savings compared to traditional air conditioners, which tend to frequently cycle on and off, consuming more power. By continuously regulating the temperature, the Panasonic units not only save electricity but also prolong the lifespan of the compressor.

Another noteworthy characteristic is the nanoe™ technology integrated into some of these models. Nanoe™ technology uses hydroxyl radicals to purify the air, minimizing harmful bacteria and allergens. This makes the Panasonic units particularly suitable for users with allergies or respiratory issues, providing a cleaner and healthier indoor environment.

In terms of design, these models are sleek and compact, allowing them to fit seamlessly into any room decor, whether in a home, office, or commercial space. The quiet operation is another advantage, making them ideal for bedrooms and study areas where minimal noise is essential.

Furthermore, the CS-KE18NB4UW and CU-KE12NK1 offer a range of powerful cooling and heating capacities, making them versatile solutions for various climate conditions. The cold climate performance ensures consistent heating in colder regions, while the robust cooling capabilities make them perfect for hot summer months.

The user-friendly features include a smart remote control system, allowing users to adjust settings with ease from a distance. Some models are equipped with Wi-Fi capability, enabling integration with smart home systems for enhanced control and programmability.

In conclusion, the Panasonic CS-KE18NB4UW, CU-KE12NK1, CS-KE12NB41, CZ-18BT1U, and CU-KE18NKU air conditioning units exemplify innovation and efficiency. With their inverter technology, air purification features, compact designs, and smart functionalities, they stand out as ideal choices for maintaining comfortable and healthy indoor environments throughout the year.