Mitsubishi Electronics MSZ-FD09NA service manual Replace the horizontal vane motor

Page 31

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

Turn OFF the power supply.

Remove indoor fan motor connector CN211, vane motor connector CN151 and the i-see Sensor motor connector CN110 from the indoor electronic control P.C. board and turn ON the power supply.

Does the unit operate with the remote controller?

Does POWER lamp light up by pressing EMERGENCY OPERATION switch?

No

Turn OFF the power supply.

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

 

 

 

 

 

 

 

 

 

 

 

 

Measure the resistance of the i-see

 

 

Short/open circuit:

 

 

 

 

Sensor motor coil.

 

 

Replace the i-see Sensor motor and the

 

 

 

 

(Refer to 9-5.)

 

 

indoor electronic control P.C. board.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Measure the resistance between

 

 

 

 

 

 

 

 

 

Short/open circuit:

 

 

 

 

CN211 and of the indoor fan motor

 

 

Yes

 

 

 

 

 

Replace the indoor fan motor.

 

 

 

connector.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Measure the resistance of the horizon-

 

 

Short/open circuit:

 

 

 

 

tal vane motor coil and the vertical vane

 

 

Replace the horizontal vane motor, the

 

 

 

 

motor coil.

 

 

vertical vane motor and the indoor electronic

 

 

 

 

(Refer to 9-5.)

 

 

control P.C. board.

 

 

 

 

 

 

 

 

Replace the varistor (NR11) and fuse (F11).

Yes

Are the varistor (NR11) burnt and the fuse (F11)

blown?No

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

Is the fuse (F11) blown

only?No

Yes

Measure the resistance between

(+) and (-) of the indoor fan motor connector. 1, 2

1. The fan motor connector's lead wire is red, whereas is black.

2. Connect "+" of the tester to fan motor connector's lead wire, and "-" to lead wire, otherwise the resistance can- not be measured properly.

Is the resistance 1 MΩ

or more?

No

Yes

Replace the fuse (F11) and the indoor fan motor.

Replace the fuse (F11).

Measure the resistance of cement resistor (R111) on the indoor elec-

tronic control P.C. board.

Is the resistance approx.

 

4 Ω?

No

 

Yes

 

 

 

 

 

 

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

Replace the indoor electronic control P.C. board.

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Contents MSZ-FD09NA MSZ-FD12NA Specification has been corrected New model Part Names and Functions AccessoriesIndoor model Power supply Phase, Hz 208/230Weight External finish Remote controllerOutlet AIR Speed and Coverage Range Operating RangeAir out Outlines and DimensionsUnit inch AirWiring Diagram Unitinch Refrigerant System DiagramRefrigerant flow in cooling Refrigerant flow in heating P.C. Board Modification for Individual Operation Service FunctionsTimer Short Mode How to modify the remote controller P.C. boardAuto Restart Function How to release Auto Restart FunctionOperation Lamp blinks in abnormal condition Microprocessor ControlRefer to Lamp lights during operationDRY Operation Cool OperationHeat Operation Outdoor Unit MXZ series Auto Change Over ··· Auto Mode OperationMode selection Auto Vane OperationFeet, set the horizontal DirectionVertical vane Enlarged view of i-see Sensor Area SettingSee Control Operation See SensorNighttime Cold area DaytimeLighted Not lighted Center ····· Operation and operating rangeProgram Timer Changing temperature indication F/C Minute Time Delay OperationEMERGENCY/TEST Operation How to replace batteries TroubleshootingBefore troubleshooting, check the following Lead wiring Housing point Troubleshooting procedureOFF Failure Mode Recall FunctionPower Indoor unit failure mode tableInstruction of Troubleshooting Lighted Blinking Troubleshooting Check TableArea R Power Trouble Criterion of Main Parts MSZ-FD09NAMSZ-FD12NA Check of indoor fan motor Troubleshooting FlowPage Replace the horizontal vane motor, How to check miswiring and serial signal error Electromagnetic noise enters into TV sets or radios Indoor electronic control P.C. board Test Point Diagram and VoltageSW P.C. Board Power monitor receiver P.C. board Monitor P.C. board Removing the panel Photo Disassembly InstructionsOpen the rear cover of the power monitor receiver P.C Operating Procedure PhotosCorrect position Removing the nozzle assemblyRemoving the electrical box Photo Photo Removing the vertical vane motor unitRemoving the indoor fan motor and the line flow fan Photo Removing the horizontal vane motor PhotoMade in Japan

MSZ-FD09NA specifications

The Mitsubishi Electronics MSZ-FD09NA is a wall-mounted split-type air conditioning unit that exemplifies the brand's commitment to efficiency, comfort, and advanced technology. This unit is designed to provide optimal cooling and heating solutions for residential and light commercial spaces, ensuring a comfortable environment year-round.

One of the standout features of the MSZ-FD09NA is its impressive energy efficiency rating. With a high SEER (Seasonal Energy Efficiency Ratio) rating, it utilizes less energy while maintaining high performance, which can lead to significant cost savings on utility bills. This unit adheres to modern energy conservation standards, making it an environmentally friendly choice that appeals to eco-conscious consumers.

The MSZ-FD09NA is equipped with Mitsubishi’s advanced inverter technology, which allows the compressor to adjust its speed according to the desired temperature. This ensures that energy is used efficiently and that fluctuations in temperature are minimized, resulting in enhanced comfort levels. The inverter technology also helps in reducing noise levels, creating a quieter operation compared to traditional HVAC systems.

Another remarkable characteristic of the MSZ-FD09NA is its sleek and modern design, which seamlessly integrates into various interior décors. The unit is available in a clean white finish, making it an unobtrusive addition to any room. Furthermore, it has a compact design that maximizes floor space while providing powerful performance.

The unit also features cutting-edge air filtration systems designed to purify indoor air. With a multi-stage filtration process, including a catechin filter and an anti-allergen enzyme filter, the MSZ-FD09NA effectively captures dust, allergens, and other airborne particles. This feature is particularly beneficial for those with respiratory issues or allergies, contributing to a healthier living environment.

In addition, the MSZ-FD09NA is compatible with smart control options. Users can control their air conditioner remotely through a smartphone app, making it convenient to adjust settings from anywhere. This smart technology allows for programmable scheduling, enabling users to optimize the unit's operation based on their lifestyle.

In summary, the Mitsubishi Electronics MSZ-FD09NA stands out due to its energy efficiency, advanced inverter technology, modern design, high-quality air filtration, and smart control options, making it an excellent choice for those seeking reliable heating and cooling solutions.
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