Mitsubishi Electronics MSZ-FD09NA service manual

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B Check of remote controller and indoor electronic control P.C. board

Check if the remote controller is exclusive for this air conditioner.

Press OPERATE/STOP (ON/OFF) button on the remote controller.

Is LCD display on the remote controller visible?

Yes

Remove the batteries, then set them back and press RESET button. (Refer to 9-1.4.) Check if the unit operates with the remote controller.

Does the unit operate with the remote controller?

Yes

			Replace the batteries. (Refer to 9-1.4.)
	No		Replace the batteries. (Refer to 9-1.4.)
	No
	(Not clear)

			Turn ON a radio to AM and press OP-
			ERATE/STOP (ON/OFF) button on the
	No		ERATE/STOP (ON/OFF) button on the
	No		remote controller.
			remote controller.

Is noise heard from radio?

Yes

Are there any ﬂuorescent lights of inverter or rapid-start type within the range of 3.28 ft.?

			Replace the remote controller.
	No

		•Reinstall the unit away from lights.
Yes		•Attach a ﬁlter on receiving part.

Replace the indoor electronic control P.C. board. (Including the receiver)

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Contents MSZ-FD09NA MSZ-FD12NA Specification has been corrected New model Accessories Part Names and FunctionsRemote controller Power supply Phase, Hz 208/230Weight External ﬁnish Indoor modelOperating Range Outlet AIR Speed and Coverage RangeAir Outlines and DimensionsUnit inch Air outWiring Diagram Refrigerant System Diagram UnitinchRefrigerant flow in cooling Refrigerant flow in heating How to modify the remote controller P.C. board Service FunctionsTimer Short Mode P.C. Board Modification for Individual OperationHow to release Auto Restart Function Auto Restart FunctionOperation Lamp lights during operation Microprocessor ControlRefer to Lamp blinks in abnormal conditionCool Operation DRY OperationHeat Operation Auto Vane Operation Auto Change Over ··· Auto Mode OperationMode selection Outdoor Unit MXZ seriesDirection Feet, set the horizontalVertical vane See Sensor Area SettingSee Control Operation Enlarged view of i-see SensorDaytime Nighttime Cold areaLighted Not lighted Operation and operating range Center ·····Program Timer Minute Time Delay Operation Changing temperature indication F/CEMERGENCY/TEST Operation Lead wiring Housing point Troubleshooting procedure TroubleshootingBefore troubleshooting, check the following How to replace batteriesFailure Mode Recall Function OFFIndoor unit failure mode table PowerInstruction of Troubleshooting Troubleshooting Check Table Lighted BlinkingArea R Power Trouble Criterion of Main Parts MSZ-FD09NAMSZ-FD12NA Troubleshooting Flow Check of indoor fan motorPage Replace the horizontal vane motor, How to check miswiring and serial signal error Electromagnetic noise enters into TV sets or radios Test Point Diagram and Voltage Indoor electronic control P.C. boardSW P.C. Board Power monitor receiver P.C. board Monitor P.C. board Disassembly Instructions Removing the panel PhotoOperating Procedure Photos Open the rear cover of the power monitor receiver P.CPhoto Removing the vertical vane motor unit Removing the nozzle assemblyRemoving the electrical box Photo Correct positionRemoving the horizontal vane motor Photo Removing the indoor fan motor and the line flow fan 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.