Panasonic CU-S18NKU-1, CU-S9NKU-1 Operation Control, Basic Function, Internal Setting Temperature

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11. Operation Control

11.1 Basic Function

Inverter control, which equipped with a microcomputer in determining the most suitable operation mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operation mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature shifting. The compressor at outdoor unit is operating following the frequency instructed by the microcomputer at indoor unit that judging the condition according to internal setting temperature and intake air temperature.

11.1.1Internal Setting Temperature

Once the operation starts, remote control setting temperature will be taken as base value for temperature shifting processes. These shifting processes are depending on the air conditioner settings and the operation environment. The final shifted value will be used as internal setting temperature and it is updated continuously whenever the electrical power is supplied to the unit.

Remote Control Setting Temperature

60.8°F ~ 86°F

Indoor Air Temperature Shifting

Outdoor Air Temperature Shifting

Powerful Mode Shifting

Setting Temperature Limit Checking

(Min: 60.8°F; Max: 91.4°F)

Internal Setting Temperature

11.1.2Cooling Operation

11.1.2.1Thermostat control

Compressor is OFF when intake Air Temperature - Internal Setting Temperature < 29.3°F.

Compressor is ON after waiting for 3 minutes, if the Intake Temperature - Internal Setting Temperature > Compressor OFF point.

11.1.3Soft Dry Operation

11.1.3.1Thermostat control

Compressor is OFF when Intake Temperature - Internal Setting Temperature < 28.4°F.

Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF point.

11.1.3.2Automatic Operation

This mode can be set using remote control and the operation is decided by indoor intake air temperature.

During operation mode judgment at the beginning of the Auto Mode operation, indoor fan motor (with speed of Lo-) is running for 30 seconds to detect the indoor intake air temperature.

The operation mode is decided based on below chart.

 

 

Cooling

73.4°F

 

operation

 

Soft Dry

 

 

 

 

operation

Indoor intake

Air Temp

After the operation mode is decided, the unit operation will follow the respective operation mode control.

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Contents CS-S18NKU-1 CU-S18NKU-1 CS-S22NKU-1 CU-S22NKU-1 Indoor Unit Outdoor UnitCU-S12NKU-1 Table of Contents Items to be followed are classified by the symbols Safety PrecautionsPage CU-S9NKU-1 CU-S12NKU-1 ARI SpecificationDRY Bulb WET Bulb CS-S18NKU-1 CS-S22NKU-1 Piping Location of Controls and Components Indoor Unit Outdoor Unit Remote ControlCS-S9NKUW-1 CS-S12NKUW-1 DimensionsIndoor Unit CS-S18NKU-1 CS-S22NKU-1 CU-S9NKU-1 CU-S12NKU-1 CU-S18NKU-1 CU-S22NKU-1 Refrigeration Cycle Diagram CS-S18NKU-1 CU-S18NKU-1 CS-S22NKU-1 CU-S22NKU-1 Block Diagram CS-S18NKU-1 CU-S18NKU-1 CS-S22NKU-1 CU-S22NKU-1 Wiring Connection Diagram CS-S18NKU-1 CS-S22NKU-1 CU-S9NKU-1 CU-S12NKU-1 CU-S18NKU-1 CU-S22NKU-1 Electronic Circuit Diagram CS-S18NKU-1 CS-S22NKU-1 Outdoor Unit CU-S18NKU-1 CU-S22NKU-1 Main Printed Circuit Board Printed Circuit BoardPower Printed Circuit Board Indicator Printed Circuit Board CU-S9NKU-1 CU-S12NKU-1 CU-S18NKU-1 CU-S22NKU-1 Select the Best Location Installation InstructionIndoor/Outdoor Unit Installation Diagram 10.1 S9NKUW-1 S12NKUW-1Indoor Unit How to Fix Installation PlateThis can be used for left rear piping and bottom piping also Connect the Cable to the Indoor Unit Page Outdoor Unit Install the Outdoor UnitGas leak checking Piping Insulation 10.2 S18NKU-1 S22NKU-1 How to Fix Installation Plate This can be used for left rear piping and bottom piping also Connect the Cable to the Indoor Unit Page Model S18NKU-1 Evacuation of the equipment Piping Insulation Cooling Operation Internal Setting TemperatureOperation Control Basic FunctionAirflow Direction Indoor Fan Motor OperationOutdoor Fan Motor Operation For S9NK and S12NK Outdoor Fan Motor Operation For S18NK and S22NKHorizontal Airflow Quiet Operation Cooling Mode/Cooling Area of Dry Mode11.5.1 Vertical Airflow OFF Timer Control Powerful Mode OperationTimer Control On Timer ControlIndication Panel LED Power Timer Quiet Powerful12.2 30 Seconds Forced Operation Restart Control Time Delay Safety ControlIPM Power Transistor Prevention Control Protection Control12.4.2 S18NK, S22NK Low Pressure Protection Control Gas Leakage DetectionLow Frequency Protection Control Dew Prevention Control Outdoor Air Temperature ControlCooling Overload Control Freeze Prevention ControlAuto Off/On Button Servicing ModeTimer Remote Control ButtonReset RC Reset ACRefrigeration Cycle System Troubleshooting GuideCondition Cooling Mode Air conditioner To Make a Diagnosis To Display Memorized Error Code Protective OperationBreakdown Self Diagnosis Function Self Diagnosis Function Three Digits Alphanumeric CodeAbnormality / Protection control Error Code Table14.4.1 H11 Indoor/Outdoor Abnormal Communication Troubleshooting Flowchart14.4.2 H12 Indoor/Outdoor Capacity Rank Mismatched 14.4.3 H14 Indoor Intake Air Temperature Sensor Abnormality 14.4.4 H15 Compressor Temperature Sensor Abnormality 14.4.5 H16 Outdoor Current Transformer Open Circuit 14.4.6 H19 Indoor Fan Motor DC Motor Mechanism Locked 14.4.7 H23 Indoor Pipe Temperature Sensor Abnormality 14.4.8 H27 Outdoor Air Temperature Sensor Abnormality 14.4.9 H28 Outdoor Pipe Temperature Sensor Abnormality Malfunction Decision Conditions 14.4.11 H33 Unspecified Voltage between Indoor and Outdoor 14.4.12 H97 Outdoor Fan Motor DC Motor Mechanism Locked 14.4.13 H98 Indoor High Pressure Protection Malfunction Decision Conditions 14.4.15 F11 Indoor Pipe Temperature Sensor Abnormality 14.4.16 F90 Power Factor Correction Protection 14.4.17 F91 Refrigeration Cycle Abnormality 14.4.18 F93 Compressor Rotation Failure 14.4.19 F95 Cooling High Pressure Abnormality 14.4.20 F96 IPM Overheating 14.4.21 F97 Compressor Overheating 14.4.22 F98 Input Over Current Detection 14.4.23 F99 Output Over Current Detection To remove front grille Disassembly and Assembly InstructionsTo remove discharge grille Page Page CS-S9NKUW-1 CU-S9NKU-1 Technical DataOperation Characteristics Page CS-S12NKUW-1 CU-S12NKU-1 Page CS-S18NKU-1 CU-S18NKU-1 Page CS-S22NKU-1 CU-S22NKU-1 Page Exploded View and Replacement Parts List CS-S12NKUW-1 Remark CS-S18NKU-1 CS-S22NKU-1 CS-S22NKU-1 Remark Outdoor Unit CU-S12NKU-1 Remark CU-S18NKU-1 CU-S22NKU-1 CU-S22NKU-1 Remark
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CS-S9NKUW-1, CS-S22NKU-1, CU-S18NKU-1, CS-S18NKU-1, CS-S12NKUW-1 specifications

Panasonic has long been a leader in the HVAC industry, and its latest range of air conditioning units—including the CU-S9NKU-1, CU-S12NKU-1, CU-S22NKU-1, CS-S12NKUW-1, and CS-S18NKU-1—showcases innovative features and robust technologies designed to enhance home comfort while reducing energy consumption.

The CU-S9NKU-1 model is notable for its compact design, making it ideal for smaller spaces without sacrificing performance. It boasts advanced inverter technology, enabling precise temperature control and energy efficiency. The built-in air purification system ensures that indoor air quality remains high, filtering out allergens and pollutants.

Similarly, the CU-S12NKU-1 variant provides a balance of power and efficiency for medium-sized rooms. This model incorporates a quiet operation feature, making it a perfect choice for bedrooms and living areas where noise levels need to be minimized. The adjustable airflow louvers ensure that air is distributed evenly throughout the space.

For larger spaces, the CU-S22NKU-1 stands out with its high cooling and heating capacity. This model is equipped with a dual inverter compressor that enhances both efficiency and performance, providing rapid cooling or heating when needed. The user-friendly remote control and smart connectivity options allow homeowners to adjust settings conveniently, even when they’re away from home.

The CS-S12NKUW-1 model features a sleek design and additional functionalities like the Eco Mode and Sleep Mode. Eco Mode adjusts the power consumption based on the user’s preferences, while Sleep Mode operates at low noise levels, promoting a restful environment during nighttime hours.

Lastly, the CS-S18NKU-1 combines innovative technology with aesthetic appeal. Its modern design is meant to complement contemporary interiors, and its high seasonal energy efficiency ratio (SEER) indicates strong performance in cooling seasons. Additionally, this model includes several energy-saving modes that adapt to changing thermal loads, ensuring that energy wastage is minimized.

Overall, Panasonic’s CU and CS series air conditioning units offer an impressive blend of technology and design, making them suitable for various needs and spaces while focusing on energy efficiency and user comfort. Whether for residential or light commercial use, these models provide reliable, effective solutions for climate control.