Panasonic CU-S9NKU-1, CS-S18NKU-1 Protection Control, Restart Control Time Delay Safety Control

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12. Protection Control

12.1Restart Control (Time Delay Safety Control)

The compressor will not turn on within 3 minutes from the moment operation stops, although the unit is turned on again by pressing OFF/ON button at remote control within this period.

This control is not applicable if the power supply is cut off and on again.

This phenomenon is to balance the pressure inside the refrigerant cycle.

12.230 Seconds Forced Operation

Once the air conditioner is turned on, the compressor will not stop within 30 seconds in a normal operation although the intake air temperature has reached the thermo-off temperature. However, force stop by pressing the OFF/ON button at the remote control is permitted or the Auto OFF/ON button at indoor unit.

The reason for the compressor to force operation for minimum 30 seconds is to allow the refrigerant oil run in a full cycle and return back to the outdoor unit.

12.3Total Running Current Control

When the outdoor unit total running current (AC) exceeds X value, the frequency instructed for compressor operation will be decreased.

If the running current does not exceed X value for 5 seconds, the frequency instructed will be increased.

Model

S9***

S12***

S18***

S22***

Operation Mode

X (A)

X (A)

X (A)

X (A)

Cooling / Soft Dry (A)

3.89

5.19

8.77

11.05

 

 

 

 

 

Cooling / Soft Dry (B)

3.28

4.63

7.72

9.55

 

 

 

 

 

The first 30 minutes of cooling operation, (A) will be applied.

12.4IPM (Power Transistor) Prevention Control

12.4.1S9NK, S12NK

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 18.5A, the compressor will stop operate. Then, operation will restart after 3 minutes.

o If the set value exceeds again more than 30 seconds after the compressor starts, the operation will restart after 2 minutes.

o If the set value exceeds 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.

o Timer LED will be blinking (F99 is indicated).

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Contents CU-S12NKU-1 Indoor Unit Outdoor UnitCS-S18NKU-1 CU-S18NKU-1 CS-S22NKU-1 CU-S22NKU-1 Table of Contents Safety Precautions Items to be followed are classified by the symbolsPage Specification CU-S9NKU-1 CU-S12NKU-1 ARIDRY Bulb WET Bulb CS-S18NKU-1 CS-S22NKU-1 Piping Indoor Unit Outdoor Unit Remote Control Location of Controls and ComponentsIndoor Unit DimensionsCS-S9NKUW-1 CS-S12NKUW-1 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 Printed Circuit Board Main Printed Circuit BoardPower Printed Circuit Board Indicator Printed Circuit Board CU-S9NKU-1 CU-S12NKU-1 CU-S18NKU-1 CU-S22NKU-1 Installation Instruction Indoor/Outdoor Unit Installation Diagram10.1 S9NKUW-1 S12NKUW-1 Select the Best LocationHow to Fix Installation Plate Indoor UnitThis can be used for left rear piping and bottom piping also Connect the Cable to the Indoor Unit Page Install the Outdoor Unit 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 Internal Setting Temperature Operation ControlBasic Function Cooling OperationIndoor Fan Motor Operation Outdoor Fan Motor Operation For S9NK and S12NKOutdoor Fan Motor Operation For S18NK and S22NK Airflow Direction11.5.1 Vertical Airflow Quiet Operation Cooling Mode/Cooling Area of Dry ModeHorizontal Airflow Powerful Mode Operation Timer ControlOn Timer Control OFF Timer ControlLED Power Timer Quiet Powerful Indication PanelRestart Control Time Delay Safety Control IPM Power Transistor Prevention ControlProtection Control 12.2 30 Seconds Forced OperationLow Frequency Protection Control Low Pressure Protection Control Gas Leakage Detection12.4.2 S18NK, S22NK Outdoor Air Temperature Control Cooling Overload ControlFreeze Prevention Control Dew Prevention ControlServicing Mode Auto Off/On ButtonRemote Control Button Reset RCReset AC TimerTroubleshooting Guide Refrigeration Cycle SystemCondition Cooling Mode Air conditioner To Display Memorized Error Code Protective Operation Breakdown Self Diagnosis FunctionSelf Diagnosis Function Three Digits Alphanumeric Code To Make a DiagnosisError Code Table Abnormality / Protection controlTroubleshooting Flowchart 14.4.1 H11 Indoor/Outdoor Abnormal Communication14.4.2 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 Disassembly and Assembly Instructions To remove front grilleTo remove discharge grille Page Page Operation Characteristics Technical DataCS-S9NKUW-1 CU-S9NKU-1 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.