Mitsubishi Electronics MSY-A17NA, MSY-A24NA Check of indoor fan motor, Troubleshooting flow

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

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8-6. Troubleshooting flow

When OPERATION INDICATOR lamp flashes 3-time. Indoor fan does not operate.

A Check of indoor fan motor

The indoor fan motor error has occurred, and the indoor fan doesn't operate.

Turn OFF the power supply.

Is there any foreign matter that interferes the rotation of the line flow fan?

Yes

Remove the foreign matter and adjust the line flow fan.

No

Pay careful attention to the high voltage on the fan motor connector CN211.

Turn ON the power supply, wait 5 seconds or more, and then press EMERGENCY OPERATION switch.

Measure the supply voltage as follows within 12 seconds after EMERGENCY OPERATION switch is pressed.

If more than 12 seconds passes by, turn OFF the power supply and turn ON it again, then measure the voltage. w

1.Measure the voltage between CN211 1(+) and 3(-). 2.Measure the voltage between CN211 5(+) and 3(-).

wIf more than 12 seconds or more passes after EMERGENCY OPERATION switch is pressed, the voltage mentioned above 2 goes 0V DC although the indoor electric control P.C. board is normal.

Is there 294/325V DC between

 

 

 

CN211 1 (+) and 3 (-), and does

 

 

 

the voltage between CN211 5(+)

Yes

 

and 3(-) rise to the range of 3 to 6V

 

 

Replace the indoor fan motor.

 

DC within 12 seconds after

 

 

 

 

 

 

EMERGENCY OPERATION switch

 

 

 

is pressed?

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

Indoor electronic control P.C. board

CN211

Replace the indoor electronic control P.C. board.

The indoor fan motor error has occurred, and the indoor fan repeats "12-second ON and 30-second OFF" 3times, and then stops.

Measure the voltage between CN211 6(+) and 3(-) while the fan

motor is rotating.

 

No

Is it unchanged holding

(Changed)

Replace the indoor electronic control P.C. board.

0V DC or 15V DC?

 

Yes (Unchanged)

Replace the indoor fan motor.

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Mitsubishi Electronics MSY-A17NA, MSY-A24NA, MSY-A15NA, MSZ-A17NA, MSZ-A15NA Check of indoor fan motor, Troubleshooting flow

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.