Mitsubishi Electronics MSZ-A15NA, MSY-A24NA, MSY-A15NA Indoor electronic control P.C.Board

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The unit does not operate with the remote controller.

Also, OPERATION INDICATOR lamp does not light up by pressing EMERGENCY OPERATION switch.

C Check of indoor electronic control P.C. board and indoor fan motor

Turn OFF the power supply.

Remove indoor fan motor connector CN211 and

vane motor connector CN151 from the indoor electronic control P.C. board and turn ON the power supply.

Yes

Does the unit operate with the remote controller? Does OPERATION INDICATOR lamp light up by pressing EMERGENCY OPERATION switch?

No

Turn OFF the power supply.

Measure the resistance between CN211 3 and 4 of the indoor fan motor connector.

Measure the resistance of the horizontal vane motor coil.

Refer to 8-5.

Replace the indoor electronic control P.C. board.

Yes

Are the varistor(NR11) burnt No and the fuse(F11) blown?

Short/open circuit:

Replace the indoor fan motor.

Short/open circuit:

Replace the horizontal vane motor and the indoor electronic control P.C. board.

Check both “parts side” and “pattern side” of the indoor electronic control P.C. board visually.

Be sure to check both the fuse and the varistor in any case.

No

Is the fuse(F11) blown only?

Yes

Measure the resistance between 1(+) and 3(-) of the indoor fan motor connector (to CN211 on the indoor electronic control P.C. board) . w1,w2

w1. The fan motor connector's1 lead wire is red, whereas 3 is black.

w2. Connect "+" of the tester to fan motor connector's1 lead wire, and "-" to 3 lead wire, otherwise the resistance cannot be measured properly.

Is the resistance 1M"

No

 

Replace the indoor electronic control

or more?

 

 

P.C. board and the indoor fan motor.

 

 

 

 

 

 

 

Yes

Replace the indoor electronic control P.C. board

Measure the resistance of cement resistance R111 on the indoor electronic control P.C. board.

Is the resistance approx. 4"?

Yes

No

Replace the indoor electronic control P.C. board and the indoor fan motor.

Indoor electronic control P.C.Board

Varistor(NR11)

Fuse(F11)

CN211

Replace the indoor electronic control P.C. board.

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Contents Contents Revised EDITION-ATechnical Changes MSZ-A24NA MSY-A24NA Accessories Part Names and FunctionsMSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSZ-A24NA MSY-A17NA MSY-A24NASpecification Operating Range Outlet AIR Speed and Coverage RangeUnit inch Outlines and DimensionsMSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA MSZ-A24NA Wiring Diagram Refrigerant System Diagram MSZ-A09NA MSZ-A12NAMSZ-A15NA MSY-A15NA MSZ-A17NA MSY-A17NAService Functions Timer Short ModeHow to modify the remote controller P.C. board P.C. Board Modification for Individual OperationOperation TroubleshootingAuto Restart Function Troubleshooting procedure How to replace batteriesInformation for Multi System AIR Conditioner Outdoor Unit MXZ seriesFailure mode recall function Those figures show about MSZ-A09/12/15/17Indoor unit failure mode table Instruction of troubleshooting OperationTroubleshooting check table Indicates abnormalitiesTrouble criterion of main parts MXZ typeTroubleshooting flow Check of indoor fan motorCheck of remote controller and receiver P.C. board Indoor electronic control P.C.Board How to check mis-wiring and serial signal error Electromagnetic noise enters into TV sets or radios Test point diagram and voltage Power monitor receiver P.C. boardIndoor electronic control P.C. board SW P.C. boardMSZ-A24NA MSY-24NA Display P.C. board Receiver BoardDisassembly Instructions Removing the panel PhotoOperating Procedure Photos Photo Removing the electrical boxRemoving the horizontal vane motor unit Photo Removing the indoor fan motor and the line flow PhotoFan Motor bandMSZ-A24NA MSY-A24NA Operating Procedure Photos Removing the front panelRemoving the electronic control P.C. board, the receiver Board and the display P.C. boardRemoving the vane motor Removing the line flow fan and the indoor fan motorParts List Accessory and Remote ControllerNozzle Assembly Switch HolderBearing Mount Sleeve BearingAIR Cleaning Filter ANTI-ALLERGY Enzyme Filter Front Panel Assembly CatchScrew CAP GrilleIndoor Unit Functional Parts and Electrical Parts AIR Cleaning Filter ANTI-ALLERGY Enzyme Filter Catechin AIR Filter Right AIR Cleaning Filter MAC-415FT-E RoHS Qty/unit Part nameE12 751 E12 A54 235RoHS Part name E12 A54 E12 A5611 G E12 A58 620 Indoor Heat Exchanger Symbol Wiring Qty/unit Remarks E1210 G E12 888 007 Lamp Panel Diagram E12 A58 300 Indoor FAN Motor Assembly W1 11 G E12 408 303 Vane Motor HorizontalMV2 MV1 Right & Left UP & DownAIR Cleaning Filter ANTI-ALLERGY Enzyme Filter Microprocessor Control Indoor Unit Display SectionCool Operation DRY OperationHeat Operation MSZ FAN d Operation MSYFuzzy control Auto Change Over ··· Auto Mode Operation MSZMode selection Auto Vane Operation MSZ-A09/12/15/17 MSY-A15/17MSZ-A24 MSY-A24 Upward3 4 Swing 5 COOL/DRY HeatTimer Operation Program TimerEMERGENCY/TEST Operation Made in Japan
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Manual 48 pages 11.54 Kb Manual 27 pages 7.37 Kb

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.
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