14.Protection Control

14.1Protection Control For All Operations

14.1.1Restart Control (Time Delay Safety Control)

šThe 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.

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

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

14.1.230 Seconds Forced Operation

šOnce 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.

šThe 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.

14.1.3Total Running Current Control

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

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

šHowever, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for 3 minutes.

Model

E9NKUA

 

 

E12NKUA

Operation Mode

X (A)

 

Y (A)

X (A)

 

Y (A)

Cooling / Soft Dry (A)

3.89

 

15.00

6.55

 

15.00

Cooling / Soft Dry (B)

3.28

 

15.00

6.10

 

15.00

Heating

5.50

 

15.00

7.05

 

15.00

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

14.1.4IPM (Power Transistor) Prevention Control

šOverheating 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.

o If this condition repeats continuously 4 times within 20 minutes, timer LED will be blinking (“F96” is indicated).

šDC 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, timer LED will be blinking (“F99” is indicated).

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Panasonic CU-E9NKUA, CU-E12NKUA, CS-E9NKUAW, CS-E12NKUAW service manual Protection Control For All Operations

CS-E9NKUAW, CU-E9NKUA, CU-E12NKUA, CS-E12NKUAW specifications

Panasonic has established itself as a leader in the air conditioning market, offering a range of products that combine advanced technology with energy efficiency. The Panasonic models CS-E12NKUAW, CU-E12NKUA, CU-E9NKUA, CSU-2E18NBU, and CS-E9NKUAW exemplify this commitment to quality and innovation.

The CS-E12NKUAW and CS-E9NKUAW are split-type air conditioners designed for residential use. One of the standout features of these models is their energy-efficient inverter technology. This innovation allows the compressor to adjust its speed according to the cooling demand, leading to lower energy consumption and cost savings for homeowners. Additionally, these units operate quietly, ensuring a peaceful environment while effectively maintaining comfortable temperatures.

The CU-E12NKUA and CU-E9NKUA are the corresponding outdoor units that support the indoor models. These units are designed for durability and performance, using robust materials that withstand various weather conditions. Panasonic's outdoor units are equipped with a reliable cooling system that enhances the overall efficiency and longevity of the air conditioning system.

The CSU-2E18NBU model is perfect for larger spaces, handling greater loads while ensuring consistent cooling. This unit also leverages inverter technology for efficient operation. The CSU models often include advanced features such as a high-density filter that captures dust and allergens, promoting a healthier indoor environment.

All these units are designed with user-friendly interfaces, allowing for easy temperature control and adjustments. Many of the models also come with remote control options, enabling users to regulate their comfort from the convenience of their seat. Additionally, advanced air purifying technology enhances indoor air quality by eliminating harmful pollutants and odors.

Panasonic air conditioners are known for their environmentally friendly refrigerants, contributing to a reduced carbon footprint and compliance with international standards. These features reflect Panasonic's commitment to sustainability and innovation, making these models a leading choice for consumers looking to balance comfort, efficiency, and environmental responsibility.

In summary, Panasonic's CS-E12NKUAW, CU-E12NKUA, CU-E9NKUA, CSU-2E18NBU, and CS-E9NKUAW models represent some of the best in today's air conditioning market, with key features including energy efficiency, user-friendly controls, advanced air purification, and robust outdoor units designed for performance and reliability. These units provide an ideal solution for maintaining a comfortable home environment while being conscious of energy use and environmental impact.