Mitsubishi Electronics Comprehensive Service Manual for Mitsubishi MSZ-A24NA and Similar Models

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

Revision A:

• PARTS LIST has been revised.

INDOOR UNIT

SERVICE MANUAL

No. OB450

REVISED EDITION-A

Wireless type Models

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

MSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA

Outdoor unit service manual

MUZ-A·NA Series (OB451)

MXZ-A·NA Series (OB444)

CONTENTS

1.TECHNICAL CHANGES ····································2

2.PART NAMES AND FUNCTIONS······················3

3.SPECIFICATION·················································4

4.OUTLINES AND DIMENSIONS ·························6

5.WIRING DIAGRAM ············································8

6.REFRIGERANT SYSTEM DIAGRAM ················9

7.SERVICE FUNCTIONS ····································10

8.TROUBLESHOOTING······································11

9.DISASSEMBLY INSTRUCTIONS ····················25

10.PARTS LIST······················································30 10-1. PARTS LIST·············································30

10-2. RoHS PARTS LIST ··································36

11.MICROPROCESSOR CONTROL·····················42

NOTE:

This service manual describes technical data of the intdoor units. RoHS compliant products have <G> mark on the spec name plate. For servicing of RoHS compliant products, refer to the PARTS LIST (RoHS compliant).

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Contents Revised EDITION-A ContentsTechnical Changes Part Names and Functions MSZ-A24NA MSY-A24NA AccessoriesMSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSZ-A24NA MSY-A17NA MSY-A24NASpecification Outlet AIR Speed and Coverage Range Operating RangeMSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA Outlines and DimensionsUnit inch MSZ-A24NA Wiring Diagram MSZ-A09NA MSZ-A12NA Refrigerant System DiagramMSZ-A15NA MSY-A15NA MSZ-A17NA MSY-A17NATimer Short Mode Service FunctionsHow to modify the remote controller P.C. board P.C. Board Modification for Individual OperationAuto Restart Function TroubleshootingOperation How to replace batteries Troubleshooting procedureInformation for Multi System AIR Conditioner Outdoor Unit MXZ seriesThose figures show about MSZ-A09/12/15/17 Failure mode recall functionIndoor unit failure mode table Operation Instruction of troubleshootingIndicates abnormalities Troubleshooting check tableMXZ type Trouble criterion of main partsCheck of indoor fan motor Troubleshooting flowCheck 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 Power monitor receiver P.C. board Test point diagram and voltageIndoor electronic control P.C. board SW P.C. boardDisplay P.C. board Receiver Board MSZ-A24NA MSY-24NARemoving the panel Photo Disassembly InstructionsPhoto Removing the electrical box Operating Procedure PhotosRemoving the indoor fan motor and the line flow Photo Removing the horizontal vane motor unit PhotoFan Motor bandRemoving the front panel MSZ-A24NA MSY-A24NA Operating Procedure PhotosRemoving the electronic control P.C. board, the receiver Board and the display P.C. boardRemoving the line flow fan and the indoor fan motor Removing the vane motorAccessory and Remote Controller Parts ListSwitch Holder Nozzle AssemblyBearing Mount Sleeve BearingAIR Cleaning Filter ANTI-ALLERGY Enzyme Filter Catch Front Panel AssemblyScrew 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 Qty/unit Part name RoHSE12 751 E12 A54 235E12 A56 RoHS Part name E12 A5410 G E12 888 007 Lamp Panel Diagram Symbol Wiring Qty/unit Remarks E1211 G E12 A58 620 Indoor Heat Exchanger 11 G E12 408 303 Vane Motor Horizontal E12 A58 300 Indoor FAN Motor Assembly W1MV2 MV1 Right & Left UP & DownAIR Cleaning Filter ANTI-ALLERGY Enzyme Filter Indoor Unit Display Section Microprocessor ControlDRY Operation Cool OperationHeat Operation MSZ FAN d Operation MSYMode selection Auto Change Over ··· Auto Mode Operation MSZFuzzy control MSZ-A09/12/15/17 MSY-A15/17 Auto Vane OperationMSZ-A24 MSY-A24 UpwardCOOL/DRY Heat 3 4 Swing 5Program Timer Timer OperationMade in Japan EMERGENCY/TEST Operation
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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.