Panasonic CU-S12NKU-1 Low Pressure Protection Control Gas Leakage Detection, 12.4.2 S18NK, S22NK

Models: CS-S9NKUW-1 CS-S22NKU-1 CU-S18NKU-1 CS-S18NKU-1 CS-S12NKUW-1 CU-S22NKU-1 CU-S12NKU-1 CU-S9NKU-1

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12.4.2S18NK, S22NK

Overheating Prevention Control

o When the IPM temperature rises to 212°F, compressor operation will stop immediately. o Compressor operation restarts after 3 minutes the temperature decreases to 203°F.

DC Peak Current Control

o When electric current to IPM exceeds set value of 29.9A, the compressor will stop operate. Then, operation will restart after 3 minutes.

o If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will restart after 2 minute.

o If the set value is exceeded again within 30 seconds after the compressor starts, the operation will restart after 1 minute. If this condition repeats continuously for 7 times, all indoor and outdoor relays will be cut off.

12.5Compressor Overheating Prevention Control (For S18, S22NK only)

Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The changes of frequency are as below.

If compressor discharge temperature exceeds 233.6°F, compressor will be stopped, occurs 4 times per 20 minutes, timer LED will be blinking. “F97” is indicated.

12.6Low Pressure Protection Control (Gas Leakage Detection)

Control start conditions

o For 5 minutes, the compressor continously operates and outdoor total current is between 0.66A and 1.25A (S9NK and S12NK) or 0.81A and 1.23A (S18NK and S22NK).

o During Cooling and Soft Dry operation:

Indoor suction temperature – indoor piping temperature is below 39.2°F

Control contents

o Compressor stops (and restart after 3 minutes).

o If the conditions above happened 2 times within 20 minutes, the unit will:

ƒStop operation

ƒTimer LED blinks and “F91” indicated.

12.7Low Frequency Protection Control 1

When the compressor operates at frequency lower than 26Hz continued for 20 minutes, the operation frequency will be changed to 25Hz for 2 minutes. (For S9NK and S12NK)

When the compressor operates at frequency lower than 25Hz continued for 240 minutes, the operation frequency will be change to 24Hz for 2 minutes. (For S18NK and S22NK)

12.8Low Frequency Protection Control 2

When all below conditions comply, minimum limit of compressor frequency will be set.

Temperature, T, for:

Cooling / Soft Dry

S9NK and S12NK

S18NK and S22NK

 

 

 

 

Indoor intake air (°F)

T < 59 or T ≥ 86

T < 57.2 or ≥ 86

Outdoor air (°F)

T < 60.8 or T ≥ 100.4

T < 55.4 or T ≥ 100.4

Indoor heat exchanger (°F)

T < 86

T < 86

 

 

 

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Panasonic CU-S12NKU-1, CS-S18NKU-1 Low Pressure Protection Control Gas Leakage Detection, Low Frequency Protection Control

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.