Mitsubishi Electronics MSZ-A24NA, MSY-A24NA, MSY-A15NA, MSY-A17NA Indoor unit failure mode table

Models: MSY-A15NA MSZ-A09NA MSZ-A17NA MSZ-A12NA MSZ-A24NA MSZ-A15NA MSY-A24NA MSY-A17NA

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2. Indoor unit failure mode table

Left lamp of OPERATION

Abnormal point

Condition

Correspondence

INDICATOR lamp

(Failure mode)

 

 

 

 

 

 

Not lighted

Normal

 

 

 

 

1-time flash

Room temperature

The room temperature thermistor short

Refer to the characteristics of the room

or open circuit is detected every 8

every 0.5-second

thermistor

temperature thermistor (8-7.).

seconds during operation.

 

 

 

 

 

 

 

2-time flash

 

The indoor coil thermistor short or open

Refer to the characteristics of the main

Indoor coil thermistor

circuit is detected every 8 seconds during

indoor coil thermistor, the sub indoor coil

2.5-second OFF

 

operation.

thermistor (8-7.).

 

 

 

 

 

 

3-time flash

Serial signal

The serial signal from outdoor unit is

Refer to 8-6.D"How to check mis-wiring

2.5-second OFF

not received for a maximum of 6 minutes.

and serial signal error".

 

 

 

 

 

11-time flash

 

The rotational frequency feedback

Refer to 8-6.A"Check of indoor fan

Indoor fan motor

signal is not emit during the 12 seconds the

2.5-second OFF

motor".

 

indoor fan operation.

 

 

 

 

 

 

 

12-time flash

 

It cannot properly read data in the

Replace the indoor electronic control

Indoor control system

nonvolatile memory of the indoor electronic

2.5-second OFF

P.C. board.

 

control P.C. board.

 

 

 

 

 

 

 

NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (8-4.).

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Mitsubishi Electronics MSZ-A24NA, MSY-A24NA, MSY-A15NA, MSY-A17NA, MSZ-A17NA, MSZ-A15NA Indoor unit failure mode table

MSY-A15NA, MSZ-A09NA, MSZ-A17NA, MSZ-A12NA, MSZ-A24NA specifications

Mitsubishi Electronics is a renowned name in the HVAC (heating, ventilation, and air conditioning) industry, known for innovative, efficient air conditioning solutions. The MSY-A17NA, MSY-A24NA, MSZ-A15NA, MSZ-A24NA, and MSZ-A12NA models exemplify this legacy, offering advanced features and cutting-edge technology. These models cater to various room sizes and requirements, providing comfortable and reliable climate control.

The MSY-A series, including the MSY-A17NA and MSY-A24NA, is designed for both cooling and heating. They feature inverter technology, which optimizes energy use by adjusting compressor speed based on demand, resulting in significant energy savings. The units come equipped with high-performance filters that capture dust and allergens, ensuring cleaner air.

Additionally, the MSY models incorporate a quiet operation mode, making them ideal for residential use. The user-friendly remote control allows for easy adjustments, while the programmable timer adds convenience for scheduling operation times to align with the user's lifestyle. Both models are built with durability in mind, featuring rust-resistant cabinets and high-quality components that extend the lifespan of the unit.

On the other hand, the MSZ-A models, which include the MSZ-A15NA, MSZ-A24NA, and MSZ-A12NA, are wall-mounted indoor units that complement the MSY outdoor models. With their sleek design, they blend seamlessly into any interior decor. The MSZ-A units also utilize inverter technology, enhancing energy efficiency and providing fast cooling and heating performance.

One notable feature of the MSZ-A series is the advanced air purification system, which goes beyond standard filtration. It includes technologies that neutralize odors and harmful gases, creating a healthier indoor environment. The models also come with a quiet operation mode, making them suitable for bedrooms and other quiet spaces.

All Mitsubishi MSY and MSZ models have been built with proactive environmental considerations, complying with high energy efficiency standards. They contribute to lower electricity bills and reduced carbon footprints. Furthermore, their compact design ensures easy installation in various settings without sacrificing performance.

In summary, Mitsubishi Electronics' MSY-A17NA, MSY-A24NA, MSZ-A15NA, MSZ-A24NA, and MSZ-A12NA models stand out in the competitive HVAC market. With features like inverter technology, advanced air purification, and user-friendly controls, these air conditioners deliver outstanding performance, comfort, and reliability while promoting energy efficiency and sustainability.