Panasonic CZ-18BT1U + CU-KS18NKU, CS-KS12NB41, CS-KS18NB4UW service manual Lamp colors, Timer backup

Page 49

HIGH POWER

This function acts to raise the power but keeps the AC system in the same operating mode.

This function is set with the HIGH POWER button on the remote controller.

(It can be set regardless of the temperature and fan speed settings.)

HIGH POWER operation from remote controller

The unit operates at maximum output for 30 minutes, regardless of the desired temperature.

The fan speed is 1 step above "High."

Frequency

MAX

NIGHT SETBACK

When NIGHT SETBACK operation is set, the temperature and fan speed settings will be adjusted automatically to allow comfortable sleep.

When NIGHT SETBACK operation is set, " mark" appears on the remote controller. The main unit display lamp also becomes dimmer.

COOL and DRY modes

When the night setback mode is selected, the air conditioner automatically raises the temperature setting 2°F(1°C) when 30 minutes have passed after the selection was made, and then another 2°F(1°C) after another 30 minutes have passed, regardless of the indoor temperature when night setback was selected. This enables you to save energy without sacrificing comfort. This function is convenient when gentle cooling is needed.

0

Time

30 min. 5 min.

Start End

NOTE

When HIGH POWER operation ends, the unit operates at low Hz for 5 minutes, regardless of the thermostat OFF conditions.

When in DRY mode, operation is in the cooling zone.

Lamp colors

OPERATION lamp

 

DRY operation

Orange

COOL operation

Green

FAN operation

Green

OPERATION lamp

Green

TIMER lamp

Green

HIGH POWER lamp

Green

Timer backup

Operation stops if there are no operator controls for 25 hours or longer after unit operation switched from OFF to ON by use of ON timer operation.

Setting temperature

Press the NIGHT SETBACK button

2°F(1°C)

 

 

2°F(1°C)

 

 

30 min.

30 min.

Time

 

 

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Contents DC Inverter Split System AIR Conditioner Safety Precautions Prohibit Table of Contents Checking Electrical Components Models CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU Operating RangeModels CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A Unit Specifications SpecificationsIndoor Unit Outdoor UnitDimensions & Weight Indoor Unit 208V Unit Dimensions Height Inch mm 12-5/16 Outdoor Unit CU-KS12NK1A CS-KS12NB41 & CZ-18BT1UCU-KS12NK1A Outdoor Unit CU-KS18NKUA 230V CU-KS18NKUA Indoor Unit Outdoor Unit CU-KS18NKUA 208V Indoor Unit Major Component SpecificationsIndoor Unit Body CS-KS12NB41 Indoor Unit Panel CZ-18BT1UCB-CS-KS18NB4U Indoor Unit Body CS-KS18NB4UWOutdoor Unit CU-KS18NKU Outdoor UnitControl Circuit Fuse 125V 25A Outdoor Unit CU-KS18NKUA Other Component Specifications Unit inch mm Dimensional DataUnit inch mm 852-0-0010-12600-0 CU-KS18NKUA Refrigerant Flow Diagram Refrigerant Flow DiagramIndoor unit Outdoor unit Indoor Unit CS-KS18NB4UW & CZ-18BT1U Outdoor Unit CU-KS18NKULow pressure performance chart Temperature ChartsOperating current performance chart Indoor discharge air performance chartTube Cooling Capacity Power Supply 115V Single Phase 60Hz Cooling CapacityCS-KS18NB4UW & CZ-18BT1U Power Supply 230V Single Phase 60Hz Cooling CapacityCU-KS18NKU or CU-KS18NKUA Cooling Capacity Low Ambient TC Total Cooling Capacity BTU/h Electrical Data Electrical CharacteristicsCooling Outdoor Unit Complete Unit Fan Motor 18BT1U CS-KS12NB418FA2-5250-46900-2 Outdoor Unit CU-KS12NK1A 8FA2-5251-12300-2 BLK Outdoor Unit CU-KS18NKU CU-KS18NKUAAddress Setting of the Remote Controller MaintenanceHow to Connect How to DisconnectDisconnect the connectors in the control box Disassembly ProcedureRemove the air intake grill Remove the ceiling panel Remove the power box and control box Remove the indoor air temperature sensorScrew Ground cable CN07 CN03 CN09 CN06 Remove the main body lower section Remove the heat exchanger sensor Remove the drain pump and float switchRemove the heat exchanger Remove the turbo fan and fan motorOperation Functions FunctionsEmergency operation PAM- controlLamp colors Timer backupProtective Functions Compressor discharge temperature controlFreeze prevention CT Peak current cut-off controlPrecautions before Performing Inspection or Repair Troubleshooting Before Calling for ServiceMethod of Self-Diagnostics Indoor Unit Self-diagnostics LampsChecking the Indoor and Outdoor Units Using the TEST/T-RUN terminalsReplace the controller Replace the circuit board or the fuseOff Blinking Illuminated Serial Communication Error Identification ProcedureBefore the Operation Condition E01From the previous page a Condition E12 Indoor Fan Motor Trouble Diagnosis of Fan MotorOutdoor Fan Motor Noise malfunction Noise Malfunction and Electromagnetic InterferenceElectromagnetic interference Checking Electrical Components Power Supply CordMeasurement of Insulation Resistance Measurement of Insulation Resistance for Electrical PartsChecking Continuity of Fuse on PCB Assy Characteristics of New Refrigerant R410A Refrigerant R410A Special Precautions When Servicing UnitWhat is New Refrigerant R410A? CharacteristicsChecklist 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 Welding leaking points Case Refrigerant is LeakingRecharging Charging Additional Refrigerant When Tubes are ExtendedRetro-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.