Mitsubishi Electronics MSZ-FD09NA service manual Instruction of Troubleshooting

Page 25

9-3. INSTRUCTION OF TROUBLESHOOTING

Start

Indoor unit oper- ates.

Outdoor unit doesn't operate.

Indoor unit operates. Outdoor unit doesn't operate normally.

Indoor unit doesn't receive the signal from remote controller.

OPERATION INDICATOR lamp on the indoor unit is flashing on and off.

Outdoor unit

 

Outdoor

 

Unit doesn't

 

Indoor unit

 

Indoor unit

operates only

 

unit doesn't

 

operate nor-

 

operates, when

 

doesn't operate,

in Test Run

 

operate even

 

mal operation

 

EMERGENCY

 

when EMER-

operation.

 

in Test Run

 

in COOL or

 

OPERATION

 

GENCY OPERA-

 

 

 

operation.

 

HEAT mode.

 

switch is pressed.

 

TION switch is

 

 

 

 

 

 

 

 

 

 

 

 

pressed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

If blinking of OPERATION INDI- CATOR lamp cannot be checked, it can be checked with failure mode recall function.

"Test Run operation" means the operation within 30 minutes af- ter EMERGENCY OPERATION switch is pressed.

Check room temperature thermistor.

Refer to 9-7. "Test point diagram and voltage".

Refer to "How

 

Refer to

 

Refer to 9-6.

to check

 

"Check of R.V.

 

"Check of remote

inverter/

 

coil".

 

controller and

compressor".

 

 

 

indoor elec-

 

 

 

 

tronic control P.C.

 

 

 

 

board".

 

 

 

 

 

1.Check indoor/out- door connecting wire. (Check if the power is supplied to the indoor unit.)

2.Refer to 9-6. "Check of indoor electronic control P.C. board and indoor fan motor".

Refer to outdoor unit service manual.

POWER lamp

POWER lamp

 

POWER lamp

POWER lamp

 

POWER lamp

POWER lamp

POWER lamp

POWER lamp

Flash on and

2-time flash

 

3-time flash

4-time flash

 

5-time flash

6-time flash

7-time flash

14-time flash

off at 0.5-sec-

Cause:

 

Cause:

Cause:

 

Cause:

Cause:

Cause:

Cause:

ond intervals

Indoor unit

 

Indoor unit

Indoor unit

 

Outdoor unit

Outdoor unit

Outdoor unit

Outdoor unit

Cause:

• Trouble of

 

• Trouble of

• Trouble

 

• Outdoor

• Trouble of

• Trouble of

• Other ab-

Indoor/Outdoor

room tem-

 

indoor fan

of indoor

 

power

thermistor in

outdoor con-

normality

unit

perature /

 

motor

unit control

 

system

outdoor unit

trol system

 

• Miswiring or

indoor coil

 

 

 

system

 

abnormality

 

 

 

trouble of

thermistor

 

 

 

 

 

 

 

 

 

 

 

serial signal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Refer to 9-6.

Check room

 

Refer to 9-6.

 

Replace the

 

Refer to

 

Refer to

Replace the

Check "Flow

"How to

temperature

 

"Check of

 

indoor elec-

 

"How to

 

"Check of

inverter P.C.

chart of the

check miswir-

thermistor

 

indoor fan

 

tronic control

 

check invert-

 

outdoor

board or the

detailed

ing and serial

and indoor

 

motor".

 

P.C. board.

 

er/compres-

 

thermistors".

outdoor elec-

outdoor unit

signal error".

coil thermis-

 

 

 

 

 

sor".

 

 

tronic control

failure mode

 

 

tor. Refer

 

 

 

 

 

 

 

 

 

P.C. board.

recall func-

 

 

to 9-7."Test

 

 

 

 

 

 

 

 

 

 

tion."

 

 

point diagram

 

 

 

 

 

 

 

 

 

 

 

 

 

and voltage".

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25

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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 Unitinch Refrigerant System DiagramRefrigerant flow in cooling Refrigerant flow in heating Timer Short Mode Service FunctionsHow to modify the remote controller P.C. board P.C. Board Modification for Individual OperationAuto Restart Function How to release Auto Restart FunctionOperation Refer to Microprocessor ControlLamp lights during operation Lamp blinks in abnormal conditionDRY Operation Cool OperationHeat 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 SensorNighttime Cold area DaytimeLighted Not lighted Center ····· Operation and operating rangeProgram Timer Changing temperature indication F/C Minute Time Delay OperationEMERGENCY/TEST Operation 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 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 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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