Mitsubishi Electronics MSZ-FD09NA service manual Indoor unit failure mode table, Power

Page 24

2. Indoor unit failure mode table

POWER

Abnormal point

Condition

 

Correspondence

(Failure mode)

 

 

 

 

 

Not lighted

Normal

—

 

—

1-time flash every

Room temperature

The room temperature thermistor short or open

Refer to the characteristics of the room temperature

circuit is detected every 8 seconds during op-

0.5-second

thermistor

eration.

thermistor (9-7.).

 

 

 

 

2-time flash

Indoor coil thermis-

The indoor coil thermistor short or open circuit

Refer to the characteristics of the main indoor coil

2.5-second OFF

tor

is detected every 8 seconds during operation.

thermistor, the sub indoor coil thermistor (9-7.).

3-time flash

Serial signal

The serial signal from outdoor unit is not re-

Refer to 9-6.

"How to check miswiring and serial

2.5-second OFF

ceived for a maximum of 6 minutes.

signal error".

 

 

 

11-time flash

 

The rotational frequency feedback signal is

 

 

Indoor fan motor

not emit during the 12 seconds the indoor fan

Refer to 9-6.

"Check of indoor fan motor".

2.5-second OFF

 

operation.

 

 

 

 

 

 

12-time flash

Indoor control

It cannot properly read data in the nonvolatile

 

 

memory of the indoor electronic control P.C.

Replace the indoor electronic control P.C. board.

2.5-second OFF

system

board.

 

 

 

 

 

 

NOTE : Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE (9-4.).

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Contents MSZ-FD09NA MSZ-FD12NA Specification has been corrected New model Accessories Part Names and FunctionsPower supply Phase, Hz 208/230 Weight External finishRemote controller Indoor modelOperating Range Outlet AIR Speed and Coverage RangeOutlines and Dimensions Unit inchAir Air outWiring Diagram Refrigerant System Diagram UnitinchRefrigerant flow in cooling Refrigerant flow in heating Service Functions Timer Short ModeHow to modify the remote controller P.C. board P.C. Board Modification for Individual OperationHow to release Auto Restart Function Auto Restart FunctionOperation Microprocessor Control Refer toLamp lights during operation Lamp blinks in abnormal conditionCool Operation DRY OperationHeat Operation Auto Change Over ··· Auto Mode Operation Mode selectionAuto Vane Operation Outdoor Unit MXZ seriesDirection Feet, set the horizontalVertical vane Area Setting See Control OperationSee Sensor 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 Troubleshooting Before troubleshooting, check the followingLead wiring Housing point Troubleshooting procedure 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.CRemoving the nozzle assembly Removing the electrical box PhotoPhoto Removing the vertical vane motor unit 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.
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