Mitsubishi Electronics MSZ-FD09NA service manual Check of indoor fan motor, Troubleshooting Flow

Page 29

9-6. TROUBLESHOOTING FLOW

A Check of indoor fan motor

The indoor fan motor error has occurred, and the indoor fan doesn't operate.

Turn OFF the power supply.

 

 

 

 

 

 

Pay careful attention to the high voltage on the fan motor connector CN211.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Turn ON the power supply, wait 5 seconds or more, and then press

 

 

 

 

 

 

 

EMERGENCY OPERATION switch.

 

 

 

 

 

 

 

 

 

Measure the supply voltage as follows within 12 seconds after EMER-

 

 

Is there any foreign matter that interferes

 

 

 

GENCY OPERATION switch is pressed.

 

 

 

 

the rotation of the line flow fan?

 

No

 

If more than 12 seconds passes by, turn OFF the power supply and

 

 

 

 

 

 

 

turn ON it again, then measure the voltage.

 

 

 

 

Yes

 

 

 

1. Measure the voltage between CN211

(+) and

(-).

 

 

 

 

 

 

 

 

 

 

2. Measure the voltage between CN211

(+) and

(-).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

If more than 12 seconds passes after EMERGENCY OPERATION switch

 

 

 

 

 

 

Remove the foreign matter and

 

 

 

 

adjust the line flow fan.

 

 

 

is pressed, the voltage mentioned above 2 goes 0 VDC although the

 

 

 

 

 

 

indoor electronic control P.C. board is normal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is there 294/325 VDC between

 

 

 

CN211 (+) and (-), and does the

 

 

Indoor electronic

voltage between CN211 (+) and (-)

 

 

 

Replace the indoor fan motor.

control P.C. board

Yes

rise to the range of 3 to 6 VDC within

 

 

12 seconds after EMERGENCY

 

 

 

OPERATION switch is pressed?

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

CN211

Replace the indoor electronic control P.C. board.

The indoor fan motor error has occurred, and the indoor fan repeats "12-second ON and 30-second OFF" 3 times, and then stops.

Measure the voltage between CN211 (+) and (-) while the fan motor is rotating.

Is it unchanged holding

0 or 15 VDC?No (Changed)

Yes

(Unchanged)

Replace 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 AccessoriesWeight External finish Power supply Phase, Hz 208/230Remote controller Indoor modelOutlet AIR Speed and Coverage Range Operating RangeUnit inch Outlines and DimensionsAir Air outWiring Diagram Refrigerant flow in cooling Refrigerant flow in heating Refrigerant System DiagramUnitinch Timer Short Mode Service FunctionsHow to modify the remote controller P.C. board P.C. Board Modification for Individual OperationOperation How to release Auto Restart FunctionAuto Restart Function Refer to Microprocessor ControlLamp lights during operation Lamp blinks in abnormal conditionHeat Operation Cool OperationDRY Operation Mode selection Auto Change Over ··· Auto Mode OperationAuto Vane Operation Outdoor Unit MXZ seriesFeet, set the horizontal DirectionVertical vane See Control Operation Area SettingSee Sensor Enlarged view of i-see SensorLighted Not lighted DaytimeNighttime Cold area Center ····· Operation and operating rangeProgram Timer EMERGENCY/TEST Operation Minute Time Delay OperationChanging temperature indication F/C Before troubleshooting, check the following TroubleshootingLead wiring Housing point Troubleshooting procedure How to replace batteriesOFF 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 PhotosRemoving the electrical box Photo Removing the nozzle assemblyPhoto Removing the vertical vane motor unit Correct positionRemoving 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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