Panasonic CS-KS18NB4UW, CZ-18BT1U + CU-KS18NKUA service manual CS-KS12NB41, 8FA2-5250-46900-2

Page 36

TO OUTDOOR UNIT

 

Indoor Unit

CS-KS18NB4UW

CS-KS12NB41 &

& CZ-

CZ-18BT1U

6-2. Electric Wiring Diagrams

36

12 3 TERMINAL BASE

 

 

 

 

 

 

DRAIN PUMP

GND

 

 

 

FAN MOTOR

 

 

FERRITE CORE

 

 

 

 

FM

DP

GRN/YEL

 

 

 

 

 

BLK

WHT

RED

RED

BLK WHT YEL BLU

YEL/(RED) YEL/(RED)

BRN

RED

ORG

YEL

PNK

BLU

VLT

IND LAMP ASSY

 

1

2

3

4

5

 

6

7

 

8

9

10

 

 

1

2

3

4

5

 

6

7

 

8

9

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHT

BLK

GRN

BRN

RED

 

ORG

YEL

 

PNK

BLU

 

VLT

 

 

FLAP (W)

 

1

 

2

 

3

 

4

 

5

 

1

 

2

 

3

 

4

 

5

 

BLK

 

ORG

 

BLU

 

BRN

 

WHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

2

 

3

 

4

 

5

6

1

 

2

 

3

 

4

 

5

6

 

 

 

 

 

 

 

 

 

 

BLK

 

ORG

 

BLU

 

BRN

 

WHT

 

FLAP (R)

1

 

2

3

 

4

 

5

1

 

2

3

 

4

 

5

 

 

 

 

 

 

 

 

BLK

 

WHT

BRN

 

BLU

 

ORG

 

THERMISTOR

FLOAT SWITCH

ROOM

COIL-1

BLK BLK

BLK BLK

BLK BLK

18BT1U

 

1

2

3

4

5

6

 

1

3

 

 

1

2

3

4

5

6

 

1

3

 

AC1 AC2 SI

 

 

DCM

 

 

 

DP

 

 

6P (BLU)

 

3P (BLU)

 

 

6P (WHT)

 

3P (RED)

CONTROLLER

 

1

2

3

4

5

6

7

 

 

 

1

2

3

4

5

6

7

 

 

PWM/POW 7P (RED)

 

 

 

 

 

SERIAL 1

1

RED

 

 

 

2P (WHT) 2

2

WHT

 

 

 

 

BOX

 

 

 

GRN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

3

4

5

6

7

 

1

2

3

4

 

1

2

3

4

 

5

6

7

 

1

2

3

4

5

 

 

 

1

2

3

4

5

6

7

 

1

2

3

4

 

1

2

3

4

 

5

6

7

 

1

2

3

4

5

 

 

 

PWM/POW 7P (RED)

 

RC

 

 

 

 

 

IND

 

 

 

 

 

FLAP

 

 

1

1

 

SERIAL

 

 

 

 

 

4P (WHT)

 

 

7P

(WHT)

 

 

5P (WHT)

 

 

 

 

 

 

 

 

 

 

 

 

2

2

 

2P (WHT)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONTROLLER

BOX

 

1

3

 

 

1

2

 

 

1

2

 

 

1

3

 

 

1

2

 

 

1

2

 

 

FS

ROOM

COIL-1

3P (RED)

2P (YEL) 2P (RED)

8FA2-5250-46900-2

Page 35 Page 37
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Page 35 Page 37
Contents DC Inverter Split System AIR Conditioner Safety Precautions Prohibit Table of Contents Checking Electrical Components Operating Range Models CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUModels CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A Specifications Unit SpecificationsIndoor Unit Outdoor UnitDimensions & Weight Indoor Unit 208V Unit Dimensions Height Inch mm 12-5/16 CS-KS12NB41 & CZ-18BT1U Outdoor Unit CU-KS12NK1ACU-KS12NK1A Outdoor Unit CU-KS18NKUA 230V CU-KS18NKUA Indoor Unit Outdoor Unit CU-KS18NKUA 208V Major Component Specifications Indoor UnitIndoor Unit Body CS-KS12NB41 Indoor Unit Panel CZ-18BT1UIndoor Unit Body CS-KS18NB4UW CB-CS-KS18NB4UOutdoor Unit Outdoor Unit CU-KS18NKUControl Circuit Fuse 125V 25A Outdoor Unit CU-KS18NKUA Other Component Specifications Dimensional Data Unit inch mmUnit inch mm 852-0-0010-12600-0 CU-KS18NKUA Refrigerant Flow Diagram Refrigerant Flow DiagramIndoor Unit CS-KS18NB4UW & CZ-18BT1U Outdoor Unit CU-KS18NKU Indoor unit Outdoor unitTemperature Charts Low pressure performance chartOperating current performance chart Indoor discharge air performance chartTube Power Supply 115V Single Phase 60Hz Cooling Capacity Cooling CapacityPower Supply 230V Single Phase 60Hz Cooling Capacity CS-KS18NB4UW & CZ-18BT1UCU-KS18NKU or CU-KS18NKUA Cooling Capacity Low Ambient TC Total Cooling Capacity BTU/h Electrical Characteristics Electrical DataCooling Outdoor Unit Complete Unit Fan Motor CS-KS12NB41 18BT1U8FA2-5250-46900-2 Outdoor Unit CU-KS12NK1A 8FA2-5251-12300-2 Outdoor Unit CU-KS18NKU CU-KS18NKUA BLKMaintenance Address Setting of the Remote ControllerHow to Disconnect How to ConnectDisassembly Procedure Disconnect the connectors in the control boxRemove 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 PAM- controlTimer backup Lamp colorsCompressor discharge temperature control Protective FunctionsFreeze prevention CT Peak current cut-off controlTroubleshooting Before Calling for Service Precautions before Performing Inspection or RepairMethod 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 Power 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 MalfunctionAmount in the charging cylinder is less than 20% ExampleTo prevent the composition Case Refrigerant is Leaking Welding leaking pointsRecharging When Tubes are Extended Charging Additional RefrigerantRetro-Fitting Existing Systems Use of Existing Units

CZ-18BT1U + CU-KS18NKU, CZ-18BT1U + CU-KS12NK1A, CZ-18BT1U + CU-KS18NKUA, CS-KS18NB4UW, CS-KS12NB41 specifications

The Panasonic CZ-18BT1U indoor unit, when paired with the appropriate outdoor units like CU-KS18NKU, CU-KS18NKUA, CU-KS12NK1A, CS-KS18NB4UW, and CS-KS12NB41, offers a robust solution for maintaining optimal indoor climates. These units are designed for residential and commercial applications, ensuring reliable heating and cooling performance.

One of the standout features of the Panasonic CZ-18BT1U is its energy efficiency. This model boasts a high Seasonal Energy Efficiency Ratio (SEER), enabling users to enjoy a comfortable environment without incurring excessive energy costs. This is further complemented by advanced inverter technology, which allows for variable speed operation, adjusting the compressor activity based on the cooling or heating needs of the space. This feature not only enhances comfort but also minimizes energy consumption.

The outdoor unit options, CU-KS18NKU, CU-KS18NKUA, and CU-KS12NK1A, support this efficiency with high-performance compressors designed for reduced noise levels. They are built to withstand varied weather conditions, ensuring durability and longevity. The outdoor units also feature high-efficiency heat exchangers that improve thermal performance, enhancing overall system efficiency.

Noise reduction is a critical consideration in HVAC systems, and the Panasonic CS-KS18NB4UW and CS-KS12NB41 outdoor units are engineered with this in mind. They operate at low decibel levels, making them ideal for residential areas where noise can be a concern. Additionally, these units come equipped with a wide range of operational modes, such as cooling, heating, and dehumidification, providing users with year-round comfort.

Flexibility and installation convenience are enhanced by the compact design of both the indoor and outdoor units. This versatility allows for various placement options, making them suitable for different room layouts.

Moreover, these systems incorporate air purification technologies, which help to improve indoor air quality by filtering out pollutants. This feature is especially beneficial for users with allergies or respiratory conditions, ensuring a healthier living environment.

In summary, the Panasonic CZ-18BT1U paired with CU-KS18NKU, CU-KS18NKUA, CU-KS12NK1A, CS-KS18NB4UW, and CS-KS12NB41 units offer an efficient and quiet HVAC solution. With advanced technologies, energy-saving features, and health-oriented design, they are a smart investment for maintaining comfort and improving air quality in any indoor space.
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