OPERATION INDICATOR Lighted

Blinking

Not lighted

·Flashing of OPERATION INDICATOR lamp (right-hand side lamp) indicates abnormality.

·OPERATION INDICATOR lamp (left-hand side lamp) is lighted.

No.

Abnormal

Operation indicator lamp

Symptom

 

point

 

 

 

MXZ type

Right lamp flash

Outdoor unit

1

Operation

 

operates but

 

indoor unit

mode

 

 

2.5-second OFF

does not

 

setting

 

 

 

operate.

Condition

The operation mode of the each indoor

unit is differently set to COOL(includes DRY) and HEAT at the same time, the operation mode of the indoor unit that has operated at first has the priority.

Correspondence

Unify the operation mode. Refer to outdoor unit service manual.

8-5. Trouble criterion of main parts

MSZ-A09NA MSZ-A17NA MSY-A15NA

MSZ-A12NA MSZ-A15NA MSZ-A24NA MSY-A17NA MSY-A24NA

Part name

Room temperature thermistor(RT11)

Indoor coil thermistor (RT12(MAIN), RT13(SUB))

Check method and criterion

Figure

Measure the resistance with a tester.

Refer to 8-7. "Test point diagram and voltage",

"Indoor electronic control P.C. board", the chart of thermistor.

Indoor fan motor(MF)

Check 8-6. A.

 

 

 

Horizontal vane

Measure the resistance between the terminals with a tester.

RED

 

(Part temperature 50° F ~ 86° F)

ROTOR

motor(MV)

 

 

YLW

 

MSZ-A09/12/15/17NA

Color of the lead wire

Normal

 

BRN

 

MSY-A15/17NA

 

BRN-other one

235 " ~ 255 "

 

 

 

ORN

GRN

 

 

 

Horizontal vane

Measure the resistance between the terminals with a tester.

RED

 

motor(MV1)

 

(Part temperature 50° F ~ 86° F)

ROTOR

Vertical vane

 

 

YLW

 

motor(MV2)

Color of the lead wire

Normal

 

BRN

 

MSZ-A24NA

BRN-other one

282 " ~ 306 "

 

 

MSY-A24NA

ORN

GRN

 

 

17

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Mitsubishi Electronics MSY-A15NA, MSY-A24NA, MSY-A17NA, MSZ-A17NA, MSZ-A15NA Trouble criterion of main parts, MXZ type

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.