Mitsubishi Electronics MSZ-FD09NA service manual Auto Restart Function, Operation

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7-3. AUTO RESTART FUNCTION

When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation in the same mode just before the shutoff of the main power.

Operation

If the main power has been cut, the operation settings remain.

After the power is restored, the unit restarts automatically according to the memory. (However, it takes at least 3 minutes for the compressor to start running.)

How to release “AUTO RESTART FUNCTION”

Turn off the main power of the unit.

Solder the Jumper wire JR07 on the indoor electronic control P.C. board. (Refer to 9-7.)

CN130

IC156

JR07

CN1U1

CN212 CN151CN1T1 CN112CN1R1 CN211

NOTE:

•The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller.

•If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is cancelled.

•If the unit has been off with the remote controller before power failure, the auto restart function does not work as the power button of the remote controller is OFF.

•To prevent breaker OFF due to the rush of starting current, systematize other home appliance not to turn ON at the same time.

•When some air conditioners are connected to the same supply system, if they are operated before power failure, the starting current of all the compressors may flow simultaneously at restart.

Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current by adding to the system that allows the units to start one by one.

7-4. REMOTE CONTROLLER

Be sure to set the slide switch inside the remote controller to an appropriate position in accordance with the installed position of the indoor unit. If the switch is not set correctly, the air conditioner may not function properly.

Slide swich

Area

Left

Center

Right

Position of

 

 

 

the slide

 

 

 

switch

 

 

 

Display on the remote controller

Where is the indoor unit installed in your room?

Installed at left, if the distance is not more than 19-3/4 inch (50 cm).

Installed at right, if the distance is not more than 19-3/4 inch (50 cm).

(Left)

(Center)

(Right)

 

 

Is the indoor unit

 

 

installed at right,

 

 

left or center?

NOTE:If the indoor unit is installed more than 19-3/4 inch (50 cm) away from the side walls, cabinets or other nearby objects, set the slide switch to the “center” position.

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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 Refrigerant flow in cooling Refrigerant flow in heating Refrigerant System DiagramUnitinch P.C. Board Modification for Individual Operation Service FunctionsTimer Short Mode How to modify the remote controller P.C. boardOperation How to release Auto Restart FunctionAuto Restart Function Lamp blinks in abnormal condition Microprocessor ControlRefer to Lamp lights during operationHeat Operation Cool OperationDRY 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 SensorLighted Not lighted DaytimeNighttime Cold area Center ····· Operation and operating rangeProgram Timer EMERGENCY/TEST Operation Minute Time Delay OperationChanging temperature indication F/C 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 SW P.C. Board Test Point Diagram and VoltageIndoor electronic control 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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